ACOF VI Frontier AIV A2, L.P.

SEC source: 0001104659-24-128032 · tm2430837-6_4seq1.xml · nonDerivative · entry 1

ARES MANAGEMENT LLC · CIK 0001259313 · 10% owner

ACOF VI Frontier AIV A1, L.P. · CIK 0001862494 · 10% owner

ACOF VI Frontier AIV A2, L.P. · CIK 0001862499 · 10% owner

ACOF VI Frontier AIV A3, L.P. · CIK 0001862534 · 10% owner

ACOF VI Frontier AIV A4, L.P. · CIK 0001862529 · 10% owner

ACOF VI Frontier AIV A5, L.P. · CIK 0001862526 · 10% owner

ACOF VI Frontier AIV A6, L.P. · CIK 0001862483 · 10% owner

ACOF VI Frontier AIV A7, L.P. · CIK 0001862482 · 10% owner

ACOF VI Frontier AIV A8, L.P. · CIK 0001862505 · 10% owner

ACOF VI Frontier AIV A9, L.P. · CIK 0001862533 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnotes

Disclosed balance after: 23,922,768

F1 · ownership.nature: Following the transactions reported herein, includes (i) 90,699 shares held by ACOF VI Frontier AIV A1, L.P.; (ii) 32,525 shares held by ACOF VI Frontier AIV A2, L.P.; (iii) 7,589 shares held by ACOF VI Frontier AIV A3, L.P.; (iv) 98,660 shares held by ACOF VI Frontier AIV A4, L.P.; (v) 108,416 shares held by ACOF VI Frontier AIV A5, L.P.; (vi) 60,714 shares held by ACOF VI Frontier AIV A6, L.P.; (vii) 109,873 shares held by ACOF VI Frontier AIV A7, L.P.; (viii) 110,369 shares held by ACOF VI Frontier AIV A8, L.P.; (ix) 103,647 shares held by ACOF VI Frontier AIV A9, L.P.; (x) 32,775 shares held by ACOF VI Frontier AIV A10, L.P.; (xi) 5,470,925 shares held by ACOF VI Frontier AIV B1, L.P. (together with the foregoing entities, the "ACOF VI Funds"); (continued in next footnote)

F2 · ownership.nature: (xii) 105,592 shares held by ASOF Frontier AIV A1, L.P.; (xiii) 18,032 shares held by ASOF Frontier AIV A2, L.P.; (xiv) 830,837 shares held by ASOF Frontier AIV A3, L.P.; (xv) 281,844 shares held by ASOF Frontier AIV A4, L.P.; (xvi) 167,160 shares held by ASOF Frontier AIV A5, L.P.; (xvii) 292,124 shares held by ASOF Frontier AIV A6, L.P.; (xviii) 289,417 shares held by ASOF Frontier AIV A7, L.P.; (xix) 238,026 shares held by ASOF Frontier AIV A8, L.P.; (xx) 360,644 shares held by ASOF Frontier AIV A9, L.P.; (xxi) 259,665 shares held by ASOF Frontier AIV A10, L.P.; (xxii) 245,236 shares held by ASOF Frontier AIV A11, L.P.; (xxiii) 9,597,579 shares held by ASOF Frontier AIV B1, L.P. (together with the foregoing entities, the "ASOF Funds"); (continued in next footnote)

F3 · ownership.nature: (xxiv) 2,003,418 shares held by ASOF II Frontier Holdings 1 L.P.; (xxv) 96,560 shares held by ASOF II Frontier Holdings 2 L.P.; (xxvi) 107,553 shares held by ASOF II Frontier Holdings 3 L.P.; (xxvii) 104,240 shares held by ASOF II Frontier Holdings 4 L.P.; (xxviii) 103,240 shares held by ASOF II Frontier Holdings 5 L.P.; (xxix) 109,407 shares held by ASOF II Frontier Holdings 6 L.P.; (xxx) 109,675 shares held by ASOF II Frontier Holdings 7 L.P.; (xxxi) 479,922 shares held by ASOF II A (DE) Frontier Holdings 1 L.P.; (xxxii) 17,664 shares held by ASOF II A (DE) Frontier Holdings 2 L.P. (together with the foregoing entities, the "ASOF II Funds"); (continued in next footnote)

F4 · ownership.nature: (xxxiii) 946,429 shares held by ASSF IV AIV B Holdings III, L.P. and (xxxiv) 932,312 shares held by ASSF IV AIV B, L.P. (together with the foregoing entity, the "ASSF Funds").

F5 · ownership.nature: Ares Partners Holdco LLC is the sole member of each of Ares Voting LLC and Ares Management GP LLC, which together are the majority shareholders of Ares Management Corporation. Ares Management Corporation is the sole member of Ares Holdco LLC, which is the general partner of Ares Management Holdings LP, which is the sole member of Ares Management LLC, which is (a) the sole member of ACOF Investment Management LLC, which is the manager of the ACOF VI Funds, (b) the sole member of ASOF Investment Management LLC, which is the manager of the ASOF Funds and ASOF II Funds and (c) the general partner of ASSF Operating Manager IV, L.P., which is the manager of the ASSF Funds.

F6 · ownership.nature: Each of the foregoing entities may be deemed to share beneficial ownership of the securities reported herein, but each disclaims any such beneficial ownership of securities not held of record by them. Ares Partners Holdco LLC is managed by a board of managers, which is composed of Michael J Arougheti, Ryan Berry, R. Kipp deVeer, David B. Kaplan, Antony P. Ressler and Bennett Rosenthal (collectively, the "Board Members"). Mr. Ressler generally has veto authority over Board Members' decisions. Each of these individuals disclaims beneficial ownership of the securities that may be deemed to be beneficially owned by Ares Partners Holdco LLC.

SEC source: 0001104659-24-127218 · tm2430634-5_4seq1.xml · nonDerivative · entry 2

ARES MANAGEMENT LLC · CIK 0001259313 · 10% owner

ACOF VI Frontier AIV A1, L.P. · CIK 0001862494 · 10% owner

ACOF VI Frontier AIV A2, L.P. · CIK 0001862499 · 10% owner

ACOF VI Frontier AIV A3, L.P. · CIK 0001862534 · 10% owner

ACOF VI Frontier AIV A4, L.P. · CIK 0001862529 · 10% owner

ACOF VI Frontier AIV A5, L.P. · CIK 0001862526 · 10% owner

ACOF VI Frontier AIV A6, L.P. · CIK 0001862483 · 10% owner

ACOF VI Frontier AIV A7, L.P. · CIK 0001862482 · 10% owner

ACOF VI Frontier AIV A8, L.P. · CIK 0001862505 · 10% owner

ACOF VI Frontier AIV A9, L.P. · CIK 0001862533 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnotes

Disclosed balance after: 35,422,768

F1 · ownership.nature: Following the transactions reported herein, includes (i) 219,391 shares held by ACOF VI Frontier AIV A1, L.P.; (ii) 78,674 shares held by ACOF VI Frontier AIV A2, L.P.; (iii) 18,357 shares held by ACOF VI Frontier AIV A3, L.P.; (iv) 238,647 shares held by ACOF VI Frontier AIV A4, L.P.; (v) 262,246 shares held by ACOF VI Frontier AIV A5, L.P.; (vi) 146,861 shares held by ACOF VI Frontier AIV A6, L.P.; (vii) 265,771 shares held by ACOF VI Frontier AIV A7, L.P.; (viii) 266,970 shares held by ACOF VI Frontier AIV A8, L.P.; (ix) 250,711 shares held by ACOF VI Frontier AIV A9, L.P.; (x) 79,278 shares held by ACOF VI Frontier AIV A10, L.P.; (xi) 13,233,562 shares held by ACOF VI Frontier AIV B1, L.P. (together with the foregoing entities, the "ACOF VI Funds"); (continued in next footnote)

F2 · ownership.nature: (xii) 105,592 shares held by ASOF Frontier AIV A1, L.P.; (xiii) 18,032 shares held by ASOF Frontier AIV A2, L.P.; (xiv) 830,837 shares held by ASOF Frontier AIV A3, L.P.; (xv) 281,844 shares held by ASOF Frontier AIV A4, L.P.; (xvi) 167,160 shares held by ASOF Frontier AIV A5, L.P.; (xvii) 292,124 shares held by ASOF Frontier AIV A6, L.P.; (xviii) 289,417 shares held by ASOF Frontier AIV A7, L.P.; (xix) 238,026 shares held by ASOF Frontier AIV A8, L.P.; (xx) 360,644 shares held by ASOF Frontier AIV A9, L.P.; (xxi) 259,665 shares held by ASOF Frontier AIV A10, L.P.; (xxii) 245,236 shares held by ASOF Frontier AIV A11, L.P.; (xxiii) 9,597,579 shares held by ASOF Frontier AIV B1, L.P. (together with the foregoing entities, the "ASOF Funds"); (continued in next footnote)

F3 · ownership.nature: (xxiv) 2,003,418 shares held by ASOF II Frontier Holdings 1 L.P.; (xxv) 96,560 shares held by ASOF II Frontier Holdings 2 L.P.; (xxvi) 107,553 shares held by ASOF II Frontier Holdings 3 L.P.; (xxvii) 104,240 shares held by ASOF II Frontier Holdings 4 L.P.; (xxviii) 103,240 shares held by ASOF II Frontier Holdings 5 L.P.; (xxix) 109,407 shares held by ASOF II Frontier Holdings 6 L.P.; (xxx) 109,675 shares held by ASOF II Frontier Holdings 7 L.P.; (xxxi) 479,922 shares held by ASOF II A (DE) Frontier Holdings 1 L.P.; (xxxii) 17,664 shares held by ASOF II A (DE) Frontier Holdings 2 L.P. (together with the foregoing entities, the "ASOF II Funds"); (continued in next footnote)

F4 · ownership.nature: (xxxiii) 2,289,306 shares held by ASSF IV AIV B Holdings III, L.P. and (xxxiv) 2,255,159 shares held by ASSF IV AIV B, L.P. (together with the foregoing entity, the "ASSF Funds").

F5 · ownership.nature: Ares Partners Holdco LLC is the sole member of each of Ares Voting LLC and Ares Management GP LLC, which together are the majority shareholders of Ares Management Corporation. Ares Management Corporation is the sole member of Ares Holdco LLC, which is the general partner of Ares Management Holdings LP, which is the sole member of Ares Management LLC, which is (a) the sole member of ACOF Investment Management LLC, which is the manager of the ACOF VI Funds, (b) the sole member of ASOF Investment Management LLC, which is the manager of the ASOF Funds and ASOF II Funds and (c) the general partner of ASSF Operating Manager IV, L.P., which is the manager of the ASSF Funds.

F6 · ownership.nature: Each of the foregoing entities may be deemed to share beneficial ownership of the securities reported herein, but each disclaims any such beneficial ownership of securities not held of record by them. Ares Partners Holdco LLC is managed by a board of managers, which is composed of Michael J Arougheti, Ryan Berry, R. Kipp deVeer, David B. Kaplan, Antony P. Ressler and Bennett Rosenthal (collectively, the "Board Members"). Mr. Ressler generally has veto authority over Board Members' decisions. Each of these individuals disclaims beneficial ownership of the securities that may be deemed to be beneficially owned by Ares Partners Holdco LLC.

SEC source: 0001104659-24-127218 · tm2430634-5_4seq1.xml · nonDerivative · entry 1

ARES MANAGEMENT LLC · CIK 0001259313 · 10% owner

ACOF VI Frontier AIV A1, L.P. · CIK 0001862494 · 10% owner

ACOF VI Frontier AIV A2, L.P. · CIK 0001862499 · 10% owner

ACOF VI Frontier AIV A3, L.P. · CIK 0001862534 · 10% owner

ACOF VI Frontier AIV A4, L.P. · CIK 0001862529 · 10% owner

ACOF VI Frontier AIV A5, L.P. · CIK 0001862526 · 10% owner

ACOF VI Frontier AIV A6, L.P. · CIK 0001862483 · 10% owner

ACOF VI Frontier AIV A7, L.P. · CIK 0001862482 · 10% owner

ACOF VI Frontier AIV A8, L.P. · CIK 0001862505 · 10% owner

ACOF VI Frontier AIV A9, L.P. · CIK 0001862533 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnotes

Disclosed balance after: 35,722,768

F1 · ownership.nature: Following the transactions reported herein, includes (i) 219,391 shares held by ACOF VI Frontier AIV A1, L.P.; (ii) 78,674 shares held by ACOF VI Frontier AIV A2, L.P.; (iii) 18,357 shares held by ACOF VI Frontier AIV A3, L.P.; (iv) 238,647 shares held by ACOF VI Frontier AIV A4, L.P.; (v) 262,246 shares held by ACOF VI Frontier AIV A5, L.P.; (vi) 146,861 shares held by ACOF VI Frontier AIV A6, L.P.; (vii) 265,771 shares held by ACOF VI Frontier AIV A7, L.P.; (viii) 266,970 shares held by ACOF VI Frontier AIV A8, L.P.; (ix) 250,711 shares held by ACOF VI Frontier AIV A9, L.P.; (x) 79,278 shares held by ACOF VI Frontier AIV A10, L.P.; (xi) 13,233,562 shares held by ACOF VI Frontier AIV B1, L.P. (together with the foregoing entities, the "ACOF VI Funds"); (continued in next footnote)

F2 · ownership.nature: (xii) 105,592 shares held by ASOF Frontier AIV A1, L.P.; (xiii) 18,032 shares held by ASOF Frontier AIV A2, L.P.; (xiv) 830,837 shares held by ASOF Frontier AIV A3, L.P.; (xv) 281,844 shares held by ASOF Frontier AIV A4, L.P.; (xvi) 167,160 shares held by ASOF Frontier AIV A5, L.P.; (xvii) 292,124 shares held by ASOF Frontier AIV A6, L.P.; (xviii) 289,417 shares held by ASOF Frontier AIV A7, L.P.; (xix) 238,026 shares held by ASOF Frontier AIV A8, L.P.; (xx) 360,644 shares held by ASOF Frontier AIV A9, L.P.; (xxi) 259,665 shares held by ASOF Frontier AIV A10, L.P.; (xxii) 245,236 shares held by ASOF Frontier AIV A11, L.P.; (xxiii) 9,597,579 shares held by ASOF Frontier AIV B1, L.P. (together with the foregoing entities, the "ASOF Funds"); (continued in next footnote)

F3 · ownership.nature: (xxiv) 2,003,418 shares held by ASOF II Frontier Holdings 1 L.P.; (xxv) 96,560 shares held by ASOF II Frontier Holdings 2 L.P.; (xxvi) 107,553 shares held by ASOF II Frontier Holdings 3 L.P.; (xxvii) 104,240 shares held by ASOF II Frontier Holdings 4 L.P.; (xxviii) 103,240 shares held by ASOF II Frontier Holdings 5 L.P.; (xxix) 109,407 shares held by ASOF II Frontier Holdings 6 L.P.; (xxx) 109,675 shares held by ASOF II Frontier Holdings 7 L.P.; (xxxi) 479,922 shares held by ASOF II A (DE) Frontier Holdings 1 L.P.; (xxxii) 17,664 shares held by ASOF II A (DE) Frontier Holdings 2 L.P. (together with the foregoing entities, the "ASOF II Funds"); (continued in next footnote)

F4 · ownership.nature: (xxxiii) 2,289,306 shares held by ASSF IV AIV B Holdings III, L.P. and (xxxiv) 2,255,159 shares held by ASSF IV AIV B, L.P. (together with the foregoing entity, the "ASSF Funds").

F5 · ownership.nature: Ares Partners Holdco LLC is the sole member of each of Ares Voting LLC and Ares Management GP LLC, which together are the majority shareholders of Ares Management Corporation. Ares Management Corporation is the sole member of Ares Holdco LLC, which is the general partner of Ares Management Holdings LP, which is the sole member of Ares Management LLC, which is (a) the sole member of ACOF Investment Management LLC, which is the manager of the ACOF VI Funds, (b) the sole member of ASOF Investment Management LLC, which is the manager of the ASOF Funds and ASOF II Funds and (c) the general partner of ASSF Operating Manager IV, L.P., which is the manager of the ASSF Funds.

F6 · ownership.nature: Each of the foregoing entities may be deemed to share beneficial ownership of the securities reported herein, but each disclaims any such beneficial ownership of securities not held of record by them. Ares Partners Holdco LLC is managed by a board of managers, which is composed of Michael J Arougheti, Ryan Berry, R. Kipp deVeer, David B. Kaplan, Antony P. Ressler and Bennett Rosenthal (collectively, the "Board Members"). Mr. Ressler generally has veto authority over Board Members' decisions. Each of these individuals disclaims beneficial ownership of the securities that may be deemed to be beneficially owned by Ares Partners Holdco LLC.

SEC source: 0001104659-24-125964 · tm2430270-5_4seq1.xml · nonDerivative · entry 2

ARES MANAGEMENT LLC · CIK 0001259313 · 10% owner

ACOF VI Frontier AIV A1, L.P. · CIK 0001862494 · 10% owner

ACOF VI Frontier AIV A2, L.P. · CIK 0001862499 · 10% owner

ACOF VI Frontier AIV A3, L.P. · CIK 0001862534 · 10% owner

ACOF VI Frontier AIV A4, L.P. · CIK 0001862529 · 10% owner

ACOF VI Frontier AIV A5, L.P. · CIK 0001862526 · 10% owner

ACOF VI Frontier AIV A6, L.P. · CIK 0001862483 · 10% owner

ACOF VI Frontier AIV A7, L.P. · CIK 0001862482 · 10% owner

ACOF VI Frontier AIV A8, L.P. · CIK 0001862505 · 10% owner

ACOF VI Frontier AIV A9, L.P. · CIK 0001862533 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnotes

Disclosed balance after: 35,997,768

F1 · ownership.nature: Following the transactions reported herein, includes (i) 225,825 shares held by ACOF VI Frontier AIV A1, L.P.; (ii) 80,982 shares held by ACOF VI Frontier AIV A2, L.P.; (iii) 18,895 shares held by ACOF VI Frontier AIV A3, L.P.; (iv) 245,647 shares held by ACOF VI Frontier AIV A4, L.P.; (v) 269,938 shares held by ACOF VI Frontier AIV A5, L.P.; (vi) 151,168 shares held by ACOF VI Frontier AIV A6, L.P.; (vii) 273,566 shares held by ACOF VI Frontier AIV A7, L.P.; (viii) 274,800 shares held by ACOF VI Frontier AIV A8, L.P.; (ix) 258,064 shares held by ACOF VI Frontier AIV A9, L.P.; (x) 81,603 shares held by ACOF VI Frontier AIV A10, L.P.; (xi) 13,621,694 shares held by ACOF VI Frontier AIV B1, L.P. (together with the foregoing entities, the "ACOF VI Funds"); (continued in next footnote)

F2 · ownership.nature: (xii) 105,592 shares held by ASOF Frontier AIV A1, L.P.; (xiii) 18,032 shares held by ASOF Frontier AIV A2, L.P.; (xiv) 830,837 shares held by ASOF Frontier AIV A3, L.P.; (xv) 281,844 shares held by ASOF Frontier AIV A4, L.P.; (xvi) 167,160 shares held by ASOF Frontier AIV A5, L.P.; (xvii) 292,124 shares held by ASOF Frontier AIV A6, L.P.; (xviii) 289,417 shares held by ASOF Frontier AIV A7, L.P.; (xix) 238,026 shares held by ASOF Frontier AIV A8, L.P.; (xx) 360,644 shares held by ASOF Frontier AIV A9, L.P.; (xxi) 259,665 shares held by ASOF Frontier AIV A10, L.P.; (xxii) 245,236 shares held by ASOF Frontier AIV A11, L.P.; (xxiii) 9,597,579 shares held by ASOF Frontier AIV B1, L.P. (together with the foregoing entities, the "ASOF Funds"); (continued in next footnote)

F3 · ownership.nature: (xxiv) 2,003,418 shares held by ASOF II Frontier Holdings 1 L.P.; (xxv) 96,560 shares held by ASOF II Frontier Holdings 2 L.P.; (xxvi) 107,553 shares held by ASOF II Frontier Holdings 3 L.P.; (xxvii) 104,240 shares held by ASOF II Frontier Holdings 4 L.P.; (xxviii) 103,240 shares held by ASOF II Frontier Holdings 5 L.P.; (xxix) 109,407 shares held by ASOF II Frontier Holdings 6 L.P.; (xxx) 109,675 shares held by ASOF II Frontier Holdings 7 L.P.; (xxxi) 479,922 shares held by ASOF II A (DE) Frontier Holdings 1 L.P.; (xxxii) 17,664 shares held by ASOF II A (DE) Frontier Holdings 2 L.P. (together with the foregoing entities, the "ASOF II Funds"); (continued in next footnote)

F4 · ownership.nature: (xxxiii) 2,356,450 shares held by ASSF IV AIV B Holdings III, L.P. and (xxxiv) 2,321,301 shares held by ASSF IV AIV B, L.P. (together with the foregoing entity, the "ASSF Funds").

F5 · ownership.nature: Ares Partners Holdco LLC is the sole member of each of Ares Voting LLC and Ares Management GP LLC, which together are the majority shareholders of Ares Management Corporation. Ares Management Corporation is the sole member of Ares Holdco LLC, which is the general partner of Ares Management Holdings LP, which is the sole member of Ares Management LLC, which is (a) the sole member of ACOF Investment Management LLC, which is the manager of the ACOF VI Funds, (b) the sole member of ASOF Investment Management LLC, which is the manager of the ASOF Funds and ASOF II Funds and (c) the general partner of ASSF Operating Manager IV, L.P., which is the manager of the ASSF Funds.

F6 · ownership.nature: Each of the foregoing entities may be deemed to share beneficial ownership of the securities reported herein, but each disclaims any such beneficial ownership of securities not held of record by them. Ares Partners Holdco LLC is managed by a board of managers, which is composed of Michael J Arougheti, Ryan Berry, R. Kipp deVeer, David B. Kaplan, Antony P. Ressler and Bennett Rosenthal (collectively, the "Board Members"). Mr. Ressler generally has veto authority over Board Members' decisions. Each of these individuals disclaims beneficial ownership of the securities that may be deemed to be beneficially owned by Ares Partners Holdco LLC.

SEC source: 0001104659-24-125964 · tm2430270-5_4seq1.xml · nonDerivative · entry 1

ARES MANAGEMENT LLC · CIK 0001259313 · 10% owner

ACOF VI Frontier AIV A1, L.P. · CIK 0001862494 · 10% owner

ACOF VI Frontier AIV A2, L.P. · CIK 0001862499 · 10% owner

ACOF VI Frontier AIV A3, L.P. · CIK 0001862534 · 10% owner

ACOF VI Frontier AIV A4, L.P. · CIK 0001862529 · 10% owner

ACOF VI Frontier AIV A5, L.P. · CIK 0001862526 · 10% owner

ACOF VI Frontier AIV A6, L.P. · CIK 0001862483 · 10% owner

ACOF VI Frontier AIV A7, L.P. · CIK 0001862482 · 10% owner

ACOF VI Frontier AIV A8, L.P. · CIK 0001862505 · 10% owner

ACOF VI Frontier AIV A9, L.P. · CIK 0001862533 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnotes

Disclosed balance after: 36,167,768

F1 · ownership.nature: Following the transactions reported herein, includes (i) 225,825 shares held by ACOF VI Frontier AIV A1, L.P.; (ii) 80,982 shares held by ACOF VI Frontier AIV A2, L.P.; (iii) 18,895 shares held by ACOF VI Frontier AIV A3, L.P.; (iv) 245,647 shares held by ACOF VI Frontier AIV A4, L.P.; (v) 269,938 shares held by ACOF VI Frontier AIV A5, L.P.; (vi) 151,168 shares held by ACOF VI Frontier AIV A6, L.P.; (vii) 273,566 shares held by ACOF VI Frontier AIV A7, L.P.; (viii) 274,800 shares held by ACOF VI Frontier AIV A8, L.P.; (ix) 258,064 shares held by ACOF VI Frontier AIV A9, L.P.; (x) 81,603 shares held by ACOF VI Frontier AIV A10, L.P.; (xi) 13,621,694 shares held by ACOF VI Frontier AIV B1, L.P. (together with the foregoing entities, the "ACOF VI Funds"); (continued in next footnote)

F2 · ownership.nature: (xii) 105,592 shares held by ASOF Frontier AIV A1, L.P.; (xiii) 18,032 shares held by ASOF Frontier AIV A2, L.P.; (xiv) 830,837 shares held by ASOF Frontier AIV A3, L.P.; (xv) 281,844 shares held by ASOF Frontier AIV A4, L.P.; (xvi) 167,160 shares held by ASOF Frontier AIV A5, L.P.; (xvii) 292,124 shares held by ASOF Frontier AIV A6, L.P.; (xviii) 289,417 shares held by ASOF Frontier AIV A7, L.P.; (xix) 238,026 shares held by ASOF Frontier AIV A8, L.P.; (xx) 360,644 shares held by ASOF Frontier AIV A9, L.P.; (xxi) 259,665 shares held by ASOF Frontier AIV A10, L.P.; (xxii) 245,236 shares held by ASOF Frontier AIV A11, L.P.; (xxiii) 9,597,579 shares held by ASOF Frontier AIV B1, L.P. (together with the foregoing entities, the "ASOF Funds"); (continued in next footnote)

F3 · ownership.nature: (xxiv) 2,003,418 shares held by ASOF II Frontier Holdings 1 L.P.; (xxv) 96,560 shares held by ASOF II Frontier Holdings 2 L.P.; (xxvi) 107,553 shares held by ASOF II Frontier Holdings 3 L.P.; (xxvii) 104,240 shares held by ASOF II Frontier Holdings 4 L.P.; (xxviii) 103,240 shares held by ASOF II Frontier Holdings 5 L.P.; (xxix) 109,407 shares held by ASOF II Frontier Holdings 6 L.P.; (xxx) 109,675 shares held by ASOF II Frontier Holdings 7 L.P.; (xxxi) 479,922 shares held by ASOF II A (DE) Frontier Holdings 1 L.P.; (xxxii) 17,664 shares held by ASOF II A (DE) Frontier Holdings 2 L.P. (together with the foregoing entities, the "ASOF II Funds"); (continued in next footnote)

F4 · ownership.nature: (xxxiii) 2,356,450 shares held by ASSF IV AIV B Holdings III, L.P. and (xxxiv) 2,321,301 shares held by ASSF IV AIV B, L.P. (together with the foregoing entity, the "ASSF Funds").

F5 · ownership.nature: Ares Partners Holdco LLC is the sole member of each of Ares Voting LLC and Ares Management GP LLC, which together are the majority shareholders of Ares Management Corporation. Ares Management Corporation is the sole member of Ares Holdco LLC, which is the general partner of Ares Management Holdings LP, which is the sole member of Ares Management LLC, which is (a) the sole member of ACOF Investment Management LLC, which is the manager of the ACOF VI Funds, (b) the sole member of ASOF Investment Management LLC, which is the manager of the ASOF Funds and ASOF II Funds and (c) the general partner of ASSF Operating Manager IV, L.P., which is the manager of the ASSF Funds.

F6 · ownership.nature: Each of the foregoing entities may be deemed to share beneficial ownership of the securities reported herein, but each disclaims any such beneficial ownership of securities not held of record by them. Ares Partners Holdco LLC is managed by a board of managers, which is composed of Michael J Arougheti, Ryan Berry, R. Kipp deVeer, David B. Kaplan, Antony P. Ressler and Bennett Rosenthal (collectively, the "Board Members"). Mr. Ressler generally has veto authority over Board Members' decisions. Each of these individuals disclaims beneficial ownership of the securities that may be deemed to be beneficially owned by Ares Partners Holdco LLC.

SEC source: 0001104659-24-125211 · tm2430031-5_4seq1.xml · nonDerivative · entry 2

ARES MANAGEMENT LLC · CIK 0001259313 · 10% owner

ACOF VI Frontier AIV A1, L.P. · CIK 0001862494 · 10% owner

ACOF VI Frontier AIV A2, L.P. · CIK 0001862499 · 10% owner

ACOF VI Frontier AIV A3, L.P. · CIK 0001862534 · 10% owner

ACOF VI Frontier AIV A4, L.P. · CIK 0001862529 · 10% owner

ACOF VI Frontier AIV A5, L.P. · CIK 0001862526 · 10% owner

ACOF VI Frontier AIV A6, L.P. · CIK 0001862483 · 10% owner

ACOF VI Frontier AIV A7, L.P. · CIK 0001862482 · 10% owner

ACOF VI Frontier AIV A8, L.P. · CIK 0001862505 · 10% owner

ACOF VI Frontier AIV A9, L.P. · CIK 0001862533 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnotes

Disclosed balance after: 36,827,768

F1 · ownership.nature: Following the transactions reported herein, includes (i) 235,113 shares held by ACOF VI Frontier AIV A1, L.P.; (ii) 84,313 shares held by ACOF VI Frontier AIV A2, L.P.; (iii) 19,672 shares held by ACOF VI Frontier AIV A3, L.P.; (iv) 255,750 shares held by ACOF VI Frontier AIV A4, L.P.; (v) 281,041 shares held by ACOF VI Frontier AIV A5, L.P.; (vi) 157,385 shares held by ACOF VI Frontier AIV A6, L.P.; (vii) 284,818 shares held by ACOF VI Frontier AIV A7, L.P.; (viii) 286,103 shares held by ACOF VI Frontier AIV A8, L.P.; (ix) 268,678 shares held by ACOF VI Frontier AIV A9, L.P.; (x) 84,959 shares held by ACOF VI Frontier AIV A10, L.P.; (xi) 14,181,955 shares held by ACOF VI Frontier AIV B1, L.P. (together with the foregoing entities, the "ACOF VI Funds"); (continued in next footnote)

F2 · ownership.nature: (xii) 105,592 shares held by ASOF Frontier AIV A1, L.P.; (xiii) 18,032 shares held by ASOF Frontier AIV A2, L.P.; (xiv) 830,837 shares held by ASOF Frontier AIV A3, L.P.; (xv) 281,844 shares held by ASOF Frontier AIV A4, L.P.; (xvi) 167,160 shares held by ASOF Frontier AIV A5, L.P.; (xvii) 292,124 shares held by ASOF Frontier AIV A6, L.P.; (xviii) 289,417 shares held by ASOF Frontier AIV A7, L.P.; (xix) 238,026 shares held by ASOF Frontier AIV A8, L.P.; (xx) 360,644 shares held by ASOF Frontier AIV A9, L.P.; (xxi) 259,665 shares held by ASOF Frontier AIV A10, L.P.; (xxii) 245,236 shares held by ASOF Frontier AIV A11, L.P.; (xxiii) 9,597,579 shares held by ASOF Frontier AIV B1, L.P. (together with the foregoing entities, the "ASOF Funds"); (continued in next footnote)

F3 · ownership.nature: (xxiv) 2,003,418 shares held by ASOF II Frontier Holdings 1 L.P.; (xxv) 96,560 shares held by ASOF II Frontier Holdings 2 L.P.; (xxvi) 107,553 shares held by ASOF II Frontier Holdings 3 L.P.; (xxvii) 104,240 shares held by ASOF II Frontier Holdings 4 L.P.; (xxviii) 103,240 shares held by ASOF II Frontier Holdings 5 L.P.; (xxix) 109,407 shares held by ASOF II Frontier Holdings 6 L.P.; (xxx) 109,675 shares held by ASOF II Frontier Holdings 7 L.P.; (xxxi) 479,922 shares held by ASOF II A (DE) Frontier Holdings 1 L.P.; (xxxii) 17,664 shares held by ASOF II A (DE) Frontier Holdings 2 L.P. (together with the foregoing entities, the "ASOF II Funds"); (continued in next footnote)

F4 · ownership.nature: (xxxiii) 2,453,371 shares held by ASSF IV AIV B Holdings III, L.P. and (xxxiv) 2,416,775 shares held by ASSF IV AIV B, L.P. (together with the foregoing entity, the "ASSF Funds").

F5 · ownership.nature: Ares Partners Holdco LLC is the sole member of each of Ares Voting LLC and Ares Management GP LLC, which together are the majority shareholders of Ares Management Corporation. Ares Management Corporation is the sole member of Ares Holdco LLC, which is the general partner of Ares Management Holdings LP, which is the sole member of Ares Management LLC, which is (a) the sole member of ACOF Investment Management LLC, which is the manager of the ACOF VI Funds, (b) the sole member of ASOF Investment Management LLC, which is the manager of the ASOF Funds and ASOF II Funds and (c) the general partner of ASSF Operating Manager IV, L.P., which is the manager of the ASSF Funds.

F6 · ownership.nature: Each of the foregoing entities may be deemed to share beneficial ownership of the securities reported herein, but each disclaims any such beneficial ownership of securities not held of record by them. Ares Partners Holdco LLC is managed by a board of managers, which is composed of Michael J Arougheti, Ryan Berry, R. Kipp deVeer, David B. Kaplan, Antony P. Ressler and Bennett Rosenthal (collectively, the "Board Members"). Mr. Ressler generally has veto authority over Board Members' decisions. Each of these individuals disclaims beneficial ownership of the securities that may be deemed to be beneficially owned by Ares Partners Holdco LLC.

SEC source: 0001104659-24-125211 · tm2430031-5_4seq1.xml · nonDerivative · entry 1

ARES MANAGEMENT LLC · CIK 0001259313 · 10% owner

ACOF VI Frontier AIV A1, L.P. · CIK 0001862494 · 10% owner

ACOF VI Frontier AIV A2, L.P. · CIK 0001862499 · 10% owner

ACOF VI Frontier AIV A3, L.P. · CIK 0001862534 · 10% owner

ACOF VI Frontier AIV A4, L.P. · CIK 0001862529 · 10% owner

ACOF VI Frontier AIV A5, L.P. · CIK 0001862526 · 10% owner

ACOF VI Frontier AIV A6, L.P. · CIK 0001862483 · 10% owner

ACOF VI Frontier AIV A7, L.P. · CIK 0001862482 · 10% owner

ACOF VI Frontier AIV A8, L.P. · CIK 0001862505 · 10% owner

ACOF VI Frontier AIV A9, L.P. · CIK 0001862533 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnotes

Disclosed balance after: 37,302,768

F1 · ownership.nature: Following the transactions reported herein, includes (i) 235,113 shares held by ACOF VI Frontier AIV A1, L.P.; (ii) 84,313 shares held by ACOF VI Frontier AIV A2, L.P.; (iii) 19,672 shares held by ACOF VI Frontier AIV A3, L.P.; (iv) 255,750 shares held by ACOF VI Frontier AIV A4, L.P.; (v) 281,041 shares held by ACOF VI Frontier AIV A5, L.P.; (vi) 157,385 shares held by ACOF VI Frontier AIV A6, L.P.; (vii) 284,818 shares held by ACOF VI Frontier AIV A7, L.P.; (viii) 286,103 shares held by ACOF VI Frontier AIV A8, L.P.; (ix) 268,678 shares held by ACOF VI Frontier AIV A9, L.P.; (x) 84,959 shares held by ACOF VI Frontier AIV A10, L.P.; (xi) 14,181,955 shares held by ACOF VI Frontier AIV B1, L.P. (together with the foregoing entities, the "ACOF VI Funds"); (continued in next footnote)

F2 · ownership.nature: (xii) 105,592 shares held by ASOF Frontier AIV A1, L.P.; (xiii) 18,032 shares held by ASOF Frontier AIV A2, L.P.; (xiv) 830,837 shares held by ASOF Frontier AIV A3, L.P.; (xv) 281,844 shares held by ASOF Frontier AIV A4, L.P.; (xvi) 167,160 shares held by ASOF Frontier AIV A5, L.P.; (xvii) 292,124 shares held by ASOF Frontier AIV A6, L.P.; (xviii) 289,417 shares held by ASOF Frontier AIV A7, L.P.; (xix) 238,026 shares held by ASOF Frontier AIV A8, L.P.; (xx) 360,644 shares held by ASOF Frontier AIV A9, L.P.; (xxi) 259,665 shares held by ASOF Frontier AIV A10, L.P.; (xxii) 245,236 shares held by ASOF Frontier AIV A11, L.P.; (xxiii) 9,597,579 shares held by ASOF Frontier AIV B1, L.P. (together with the foregoing entities, the "ASOF Funds"); (continued in next footnote)

F3 · ownership.nature: (xxiv) 2,003,418 shares held by ASOF II Frontier Holdings 1 L.P.; (xxv) 96,560 shares held by ASOF II Frontier Holdings 2 L.P.; (xxvi) 107,553 shares held by ASOF II Frontier Holdings 3 L.P.; (xxvii) 104,240 shares held by ASOF II Frontier Holdings 4 L.P.; (xxviii) 103,240 shares held by ASOF II Frontier Holdings 5 L.P.; (xxix) 109,407 shares held by ASOF II Frontier Holdings 6 L.P.; (xxx) 109,675 shares held by ASOF II Frontier Holdings 7 L.P.; (xxxi) 479,922 shares held by ASOF II A (DE) Frontier Holdings 1 L.P.; (xxxii) 17,664 shares held by ASOF II A (DE) Frontier Holdings 2 L.P. (together with the foregoing entities, the "ASOF II Funds"); (continued in next footnote)

F4 · ownership.nature: (xxxiii) 2,453,371 shares held by ASSF IV AIV B Holdings III, L.P. and (xxxiv) 2,416,775 shares held by ASSF IV AIV B, L.P. (together with the foregoing entity, the "ASSF Funds").

F5 · ownership.nature: Ares Partners Holdco LLC is the sole member of each of Ares Voting LLC and Ares Management GP LLC, which together are the majority shareholders of Ares Management Corporation. Ares Management Corporation is the sole member of Ares Holdco LLC, which is the general partner of Ares Management Holdings LP, which is the sole member of Ares Management LLC, which is (a) the sole member of ACOF Investment Management LLC, which is the manager of the ACOF VI Funds, (b) the sole member of ASOF Investment Management LLC, which is the manager of the ASOF Funds and ASOF II Funds and (c) the general partner of ASSF Operating Manager IV, L.P., which is the manager of the ASSF Funds.

F6 · ownership.nature: Each of the foregoing entities may be deemed to share beneficial ownership of the securities reported herein, but each disclaims any such beneficial ownership of securities not held of record by them. Ares Partners Holdco LLC is managed by a board of managers, which is composed of Michael J Arougheti, Ryan Berry, R. Kipp deVeer, David B. Kaplan, Antony P. Ressler and Bennett Rosenthal (collectively, the "Board Members"). Mr. Ressler generally has veto authority over Board Members' decisions. Each of these individuals disclaims beneficial ownership of the securities that may be deemed to be beneficially owned by Ares Partners Holdco LLC.

SEC source: 0001104659-24-124137 · tm2429787-5_4seq1.xml · nonDerivative · entry 2

ARES MANAGEMENT LLC · CIK 0001259313 · 10% owner

ACOF VI Frontier AIV A1, L.P. · CIK 0001862494 · 10% owner

ACOF VI Frontier AIV A2, L.P. · CIK 0001862499 · 10% owner

ACOF VI Frontier AIV A3, L.P. · CIK 0001862534 · 10% owner

ACOF VI Frontier AIV A4, L.P. · CIK 0001862529 · 10% owner

ACOF VI Frontier AIV A5, L.P. · CIK 0001862526 · 10% owner

ACOF VI Frontier AIV A6, L.P. · CIK 0001862483 · 10% owner

ACOF VI Frontier AIV A7, L.P. · CIK 0001862482 · 10% owner

ACOF VI Frontier AIV A8, L.P. · CIK 0001862505 · 10% owner

ACOF VI Frontier AIV A9, L.P. · CIK 0001862533 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnotes

Disclosed balance after: 37,347,708

F1 · ownership.nature: Following the transactions reported herein, includes (i) 240,932 shares held by ACOF VI Frontier AIV A1, L.P.; (ii) 86,399 shares held by ACOF VI Frontier AIV A2, L.P.; (iii) 20,159 shares held by ACOF VI Frontier AIV A3, L.P.; (iv) 262,079 shares held by ACOF VI Frontier AIV A4, L.P.; (v) 287,996 shares held by ACOF VI Frontier AIV A5, L.P.; (vi) 161,280 shares held by ACOF VI Frontier AIV A6, L.P.; (vii) 291,866 shares held by ACOF VI Frontier AIV A7, L.P.; (viii) 293,183 shares held by ACOF VI Frontier AIV A8, L.P.; (ix) 275,327 shares held by ACOF VI Frontier AIV A9, L.P.; (x) 87,062 shares held by ACOF VI Frontier AIV A10, L.P.; (xi) 14,543,656 shares held by ACOF VI Frontier AIV B1, L.P. (together with the foregoing entities, the "ACOF VI Funds"); (continued in next footnote)

F2 · ownership.nature: (xii) 105,592 shares held by ASOF Frontier AIV A1, L.P.; (xiii) 18,032 shares held by ASOF Frontier AIV A2, L.P.; (xiv) 830,837 shares held by ASOF Frontier AIV A3, L.P.; (xv) 281,844 shares held by ASOF Frontier AIV A4, L.P.; (xvi) 167,160 shares held by ASOF Frontier AIV A5, L.P.; (xvii) 292,124 shares held by ASOF Frontier AIV A6, L.P.; (xviii) 289,417 shares held by ASOF Frontier AIV A7, L.P.; (xix) 238,026 shares held by ASOF Frontier AIV A8, L.P.; (xx) 360,644 shares held by ASOF Frontier AIV A9, L.P.; (xxi) 259,665 shares held by ASOF Frontier AIV A10, L.P.; (xxii) 245,236 shares held by ASOF Frontier AIV A11, L.P.; (xxiii) 9,597,579 shares held by ASOF Frontier AIV B1, L.P. (together with the foregoing entities, the "ASOF Funds"); (continued in next footnote)

F3 · ownership.nature: (xxiv) 2,003,418 shares held by ASOF II Frontier Holdings 1 L.P.; (xxv) 96,560 shares held by ASOF II Frontier Holdings 2 L.P.; (xxvi) 107,553 shares held by ASOF II Frontier Holdings 3 L.P.; (xxvii) 104,240 shares held by ASOF II Frontier Holdings 4 L.P.; (xxviii) 103,240 shares held by ASOF II Frontier Holdings 5 L.P.; (xxix) 109,407 shares held by ASOF II Frontier Holdings 6 L.P.; (xxx) 109,675 shares held by ASOF II Frontier Holdings 7 L.P.; (xxxi) 479,922 shares held by ASOF II A (DE) Frontier Holdings 1 L.P.; (xxxii) 17,664 shares held by ASOF II A (DE) Frontier Holdings 2 L.P. (together with the foregoing entities, the "ASOF II Funds"); (continued in next footnote)

F4 · ownership.nature: (xxxiii) 2,514,086 shares held by ASSF IV AIV B Holdings III, L.P. and (xxxiv) 2,476,583 shares held by ASSF IV AIV B, L.P. (together with the foregoing entity, the "ASSF Funds").

F5 · ownership.nature: Ares Partners Holdco LLC is the sole member of each of Ares Voting LLC and Ares Management GP LLC, which together are the majority shareholders of Ares Management Corporation. Ares Management Corporation is the sole member of Ares Holdco LLC, which is the general partner of Ares Management Holdings LP, which is the sole member of Ares Management LLC, which is (a) the sole member of ACOF Investment Management LLC, which is the manager of the ACOF VI Funds, (b) the sole member of ASOF Investment Management LLC, which is the manager of the ASOF Funds and ASOF II Funds and (c) the general partner of ASSF Operating Manager IV, L.P., which is the manager of the ASSF Funds.

F6 · ownership.nature: Each of the foregoing entities may be deemed to share beneficial ownership of the securities reported herein, but each disclaims any such beneficial ownership of securities not held of record by them. Ares Partners Holdco LLC is managed by a board of managers, which is composed of Michael J Arougheti, Ryan Berry, R. Kipp deVeer, David B. Kaplan, Antony P. Ressler and Bennett Rosenthal (collectively, the "Board Members"). Mr. Ressler generally has veto authority over Board Members' decisions. Each of these individuals disclaims beneficial ownership of the securities that may be deemed to be beneficially owned by Ares Partners Holdco LLC.

SEC source: 0001104659-24-124137 · tm2429787-5_4seq1.xml · nonDerivative · entry 1

ARES MANAGEMENT LLC · CIK 0001259313 · 10% owner

ACOF VI Frontier AIV A1, L.P. · CIK 0001862494 · 10% owner

ACOF VI Frontier AIV A2, L.P. · CIK 0001862499 · 10% owner

ACOF VI Frontier AIV A3, L.P. · CIK 0001862534 · 10% owner

ACOF VI Frontier AIV A4, L.P. · CIK 0001862529 · 10% owner

ACOF VI Frontier AIV A5, L.P. · CIK 0001862526 · 10% owner

ACOF VI Frontier AIV A6, L.P. · CIK 0001862483 · 10% owner

ACOF VI Frontier AIV A7, L.P. · CIK 0001862482 · 10% owner

ACOF VI Frontier AIV A8, L.P. · CIK 0001862505 · 10% owner

ACOF VI Frontier AIV A9, L.P. · CIK 0001862533 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnotes

Disclosed balance after: 37,431,199

F1 · ownership.nature: Following the transactions reported herein, includes (i) 240,932 shares held by ACOF VI Frontier AIV A1, L.P.; (ii) 86,399 shares held by ACOF VI Frontier AIV A2, L.P.; (iii) 20,159 shares held by ACOF VI Frontier AIV A3, L.P.; (iv) 262,079 shares held by ACOF VI Frontier AIV A4, L.P.; (v) 287,996 shares held by ACOF VI Frontier AIV A5, L.P.; (vi) 161,280 shares held by ACOF VI Frontier AIV A6, L.P.; (vii) 291,866 shares held by ACOF VI Frontier AIV A7, L.P.; (viii) 293,183 shares held by ACOF VI Frontier AIV A8, L.P.; (ix) 275,327 shares held by ACOF VI Frontier AIV A9, L.P.; (x) 87,062 shares held by ACOF VI Frontier AIV A10, L.P.; (xi) 14,543,656 shares held by ACOF VI Frontier AIV B1, L.P. (together with the foregoing entities, the "ACOF VI Funds"); (continued in next footnote)

F2 · ownership.nature: (xii) 105,592 shares held by ASOF Frontier AIV A1, L.P.; (xiii) 18,032 shares held by ASOF Frontier AIV A2, L.P.; (xiv) 830,837 shares held by ASOF Frontier AIV A3, L.P.; (xv) 281,844 shares held by ASOF Frontier AIV A4, L.P.; (xvi) 167,160 shares held by ASOF Frontier AIV A5, L.P.; (xvii) 292,124 shares held by ASOF Frontier AIV A6, L.P.; (xviii) 289,417 shares held by ASOF Frontier AIV A7, L.P.; (xix) 238,026 shares held by ASOF Frontier AIV A8, L.P.; (xx) 360,644 shares held by ASOF Frontier AIV A9, L.P.; (xxi) 259,665 shares held by ASOF Frontier AIV A10, L.P.; (xxii) 245,236 shares held by ASOF Frontier AIV A11, L.P.; (xxiii) 9,597,579 shares held by ASOF Frontier AIV B1, L.P. (together with the foregoing entities, the "ASOF Funds"); (continued in next footnote)

F3 · ownership.nature: (xxiv) 2,003,418 shares held by ASOF II Frontier Holdings 1 L.P.; (xxv) 96,560 shares held by ASOF II Frontier Holdings 2 L.P.; (xxvi) 107,553 shares held by ASOF II Frontier Holdings 3 L.P.; (xxvii) 104,240 shares held by ASOF II Frontier Holdings 4 L.P.; (xxviii) 103,240 shares held by ASOF II Frontier Holdings 5 L.P.; (xxix) 109,407 shares held by ASOF II Frontier Holdings 6 L.P.; (xxx) 109,675 shares held by ASOF II Frontier Holdings 7 L.P.; (xxxi) 479,922 shares held by ASOF II A (DE) Frontier Holdings 1 L.P.; (xxxii) 17,664 shares held by ASOF II A (DE) Frontier Holdings 2 L.P. (together with the foregoing entities, the "ASOF II Funds"); (continued in next footnote)

F4 · ownership.nature: (xxxiii) 2,514,086 shares held by ASSF IV AIV B Holdings III, L.P. and (xxxiv) 2,476,583 shares held by ASSF IV AIV B, L.P. (together with the foregoing entity, the "ASSF Funds").

F5 · ownership.nature: Ares Partners Holdco LLC is the sole member of each of Ares Voting LLC and Ares Management GP LLC, which together are the majority shareholders of Ares Management Corporation. Ares Management Corporation is the sole member of Ares Holdco LLC, which is the general partner of Ares Management Holdings LP, which is the sole member of Ares Management LLC, which is (a) the sole member of ACOF Investment Management LLC, which is the manager of the ACOF VI Funds, (b) the sole member of ASOF Investment Management LLC, which is the manager of the ASOF Funds and ASOF II Funds and (c) the general partner of ASSF Operating Manager IV, L.P., which is the manager of the ASSF Funds.

F6 · ownership.nature: Each of the foregoing entities may be deemed to share beneficial ownership of the securities reported herein, but each disclaims any such beneficial ownership of securities not held of record by them. Ares Partners Holdco LLC is managed by a board of managers, which is composed of Michael J Arougheti, Ryan Berry, R. Kipp deVeer, David B. Kaplan, Antony P. Ressler and Bennett Rosenthal (collectively, the "Board Members"). Mr. Ressler generally has veto authority over Board Members' decisions. Each of these individuals disclaims beneficial ownership of the securities that may be deemed to be beneficially owned by Ares Partners Holdco LLC.

SEC source: 0001104659-24-123129 · tm2429619-5_4seq1.xml · nonDerivative · entry 2

ARES MANAGEMENT LLC · CIK 0001259313 · 10% owner

ACOF VI Frontier AIV A1, L.P. · CIK 0001862494 · 10% owner

ACOF VI Frontier AIV A2, L.P. · CIK 0001862499 · 10% owner

ACOF VI Frontier AIV A3, L.P. · CIK 0001862534 · 10% owner

ACOF VI Frontier AIV A4, L.P. · CIK 0001862529 · 10% owner

ACOF VI Frontier AIV A5, L.P. · CIK 0001862526 · 10% owner

ACOF VI Frontier AIV A6, L.P. · CIK 0001862483 · 10% owner

ACOF VI Frontier AIV A7, L.P. · CIK 0001862482 · 10% owner

ACOF VI Frontier AIV A8, L.P. · CIK 0001862505 · 10% owner

ACOF VI Frontier AIV A9, L.P. · CIK 0001862533 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnotes

Disclosed balance after: 37,537,847

F1 · ownership.nature: Following the transactions reported herein, includes (i) 243,059 shares held by ACOF VI Frontier AIV A1, L.P.; (ii) 87,162 shares held by ACOF VI Frontier AIV A2, L.P.; (iii) 20,337 shares held by ACOF VI Frontier AIV A3, L.P.; (iv) 264,393 shares held by ACOF VI Frontier AIV A4, L.P.; (v) 290,540 shares held by ACOF VI Frontier AIV A5, L.P.; (vi) 162,704 shares held by ACOF VI Frontier AIV A6, L.P.; (vii) 294,444 shares held by ACOF VI Frontier AIV A7, L.P.; (viii) 295,772 shares held by ACOF VI Frontier AIV A8, L.P.; (ix) 277,759 shares held by ACOF VI Frontier AIV A9, L.P.; (x) 87,831 shares held by ACOF VI Frontier AIV A10, L.P.; (xi) 14,661,268 shares held by ACOF VI Frontier AIV B1, L.P. (together with the foregoing entities, the "ACOF VI Funds"); (continued in next footnote)

F2 · ownership.nature: (xii) 105,592 shares held by ASOF Frontier AIV A1, L.P.; (xiii) 18,032 shares held by ASOF Frontier AIV A2, L.P.; (xiv) 830,837 shares held by ASOF Frontier AIV A3, L.P.; (xv) 281,844 shares held by ASOF Frontier AIV A4, L.P.; (xvi) 167,160 shares held by ASOF Frontier AIV A5, L.P.; (xvii) 292,124 shares held by ASOF Frontier AIV A6, L.P.; (xviii) 289,417 shares held by ASOF Frontier AIV A7, L.P.; (xix) 238,026 shares held by ASOF Frontier AIV A8, L.P.; (xx) 360,644 shares held by ASOF Frontier AIV A9, L.P.; (xxi) 259,665 shares held by ASOF Frontier AIV A10, L.P.; (xxii) 245,236 shares held by ASOF Frontier AIV A11, L.P.; (xxiii) 9,597,579 shares held by ASOF Frontier AIV B1, L.P. (together with the foregoing entities, the "ASOF Funds"); (continued in next footnote)

F3 · ownership.nature: (xxiv) 2,003,418 shares held by ASOF II Frontier Holdings 1 L.P.; (xxv) 96,560 shares held by ASOF II Frontier Holdings 2 L.P.; (xxvi) 107,553 shares held by ASOF II Frontier Holdings 3 L.P.; (xxvii) 104,240 shares held by ASOF II Frontier Holdings 4 L.P.; (xxviii) 103,240 shares held by ASOF II Frontier Holdings 5 L.P.; (xxix) 109,407 shares held by ASOF II Frontier Holdings 6 L.P.; (xxx) 109,675 shares held by ASOF II Frontier Holdings 7 L.P.; (xxxi) 479,922 shares held by ASOF II A (DE) Frontier Holdings 1 L.P.; (xxxii) 17,664 shares held by ASOF II A (DE) Frontier Holdings 2 L.P. (together with the foregoing entities, the "ASOF II Funds"); (continued in next footnote)

F4 · ownership.nature: (xxxiii) 2,536,289 shares held by ASSF IV AIV B Holdings III, L.P. and (xxxiv) 2,498,454 shares held by ASSF IV AIV B, L.P. (together with the foregoing entity, the "ASSF Funds").

F5 · ownership.nature: Ares Partners Holdco LLC is the sole member of each of Ares Voting LLC and Ares Management GP LLC, which together are the majority shareholders of Ares Management Corporation. Ares Management Corporation is the sole member of Ares Holdco LLC, which is the general partner of Ares Management Holdings LP, which is the sole member of Ares Management LLC, which is (a) the sole member of ACOF Investment Management LLC, which is the manager of the ACOF VI Funds, (b) the sole member of ASOF Investment Management LLC, which is the manager of the ASOF Funds and ASOF II Funds and (c) the general partner of ASSF Operating Manager IV, L.P., which is the manager of the ASSF Funds.

F6 · ownership.nature: Each of the foregoing entities may be deemed to share beneficial ownership of the securities reported herein, but each disclaims any such beneficial ownership of securities not held of record by them. Ares Partners Holdco LLC is managed by a board of managers, which is composed of Michael J Arougheti, Ryan Berry, R. Kipp deVeer, David B. Kaplan, Antony P. Ressler and Bennett Rosenthal (collectively, the "Board Members"). Mr. Ressler generally has veto authority over Board Members' decisions. Each of these individuals disclaims beneficial ownership of the securities that may be deemed to be beneficially owned by Ares Partners Holdco LLC.

SEC source: 0001104659-24-123129 · tm2429619-5_4seq1.xml · nonDerivative · entry 1

ARES MANAGEMENT LLC · CIK 0001259313 · 10% owner

ACOF VI Frontier AIV A1, L.P. · CIK 0001862494 · 10% owner

ACOF VI Frontier AIV A2, L.P. · CIK 0001862499 · 10% owner

ACOF VI Frontier AIV A3, L.P. · CIK 0001862534 · 10% owner

ACOF VI Frontier AIV A4, L.P. · CIK 0001862529 · 10% owner

ACOF VI Frontier AIV A5, L.P. · CIK 0001862526 · 10% owner

ACOF VI Frontier AIV A6, L.P. · CIK 0001862483 · 10% owner

ACOF VI Frontier AIV A7, L.P. · CIK 0001862482 · 10% owner

ACOF VI Frontier AIV A8, L.P. · CIK 0001862505 · 10% owner

ACOF VI Frontier AIV A9, L.P. · CIK 0001862533 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnotes

Disclosed balance after: 37,898,769

F1 · ownership.nature: Following the transactions reported herein, includes (i) 243,059 shares held by ACOF VI Frontier AIV A1, L.P.; (ii) 87,162 shares held by ACOF VI Frontier AIV A2, L.P.; (iii) 20,337 shares held by ACOF VI Frontier AIV A3, L.P.; (iv) 264,393 shares held by ACOF VI Frontier AIV A4, L.P.; (v) 290,540 shares held by ACOF VI Frontier AIV A5, L.P.; (vi) 162,704 shares held by ACOF VI Frontier AIV A6, L.P.; (vii) 294,444 shares held by ACOF VI Frontier AIV A7, L.P.; (viii) 295,772 shares held by ACOF VI Frontier AIV A8, L.P.; (ix) 277,759 shares held by ACOF VI Frontier AIV A9, L.P.; (x) 87,831 shares held by ACOF VI Frontier AIV A10, L.P.; (xi) 14,661,268 shares held by ACOF VI Frontier AIV B1, L.P. (together with the foregoing entities, the "ACOF VI Funds"); (continued in next footnote)

F2 · ownership.nature: (xii) 105,592 shares held by ASOF Frontier AIV A1, L.P.; (xiii) 18,032 shares held by ASOF Frontier AIV A2, L.P.; (xiv) 830,837 shares held by ASOF Frontier AIV A3, L.P.; (xv) 281,844 shares held by ASOF Frontier AIV A4, L.P.; (xvi) 167,160 shares held by ASOF Frontier AIV A5, L.P.; (xvii) 292,124 shares held by ASOF Frontier AIV A6, L.P.; (xviii) 289,417 shares held by ASOF Frontier AIV A7, L.P.; (xix) 238,026 shares held by ASOF Frontier AIV A8, L.P.; (xx) 360,644 shares held by ASOF Frontier AIV A9, L.P.; (xxi) 259,665 shares held by ASOF Frontier AIV A10, L.P.; (xxii) 245,236 shares held by ASOF Frontier AIV A11, L.P.; (xxiii) 9,597,579 shares held by ASOF Frontier AIV B1, L.P. (together with the foregoing entities, the "ASOF Funds"); (continued in next footnote)

F3 · ownership.nature: (xxiv) 2,003,418 shares held by ASOF II Frontier Holdings 1 L.P.; (xxv) 96,560 shares held by ASOF II Frontier Holdings 2 L.P.; (xxvi) 107,553 shares held by ASOF II Frontier Holdings 3 L.P.; (xxvii) 104,240 shares held by ASOF II Frontier Holdings 4 L.P.; (xxviii) 103,240 shares held by ASOF II Frontier Holdings 5 L.P.; (xxix) 109,407 shares held by ASOF II Frontier Holdings 6 L.P.; (xxx) 109,675 shares held by ASOF II Frontier Holdings 7 L.P.; (xxxi) 479,922 shares held by ASOF II A (DE) Frontier Holdings 1 L.P.; (xxxii) 17,664 shares held by ASOF II A (DE) Frontier Holdings 2 L.P. (together with the foregoing entities, the "ASOF II Funds"); (continued in next footnote)

F4 · ownership.nature: (xxxiii) 2,536,289 shares held by ASSF IV AIV B Holdings III, L.P. and (xxxiv) 2,498,454 shares held by ASSF IV AIV B, L.P. (together with the foregoing entity, the "ASSF Funds").

F5 · ownership.nature: Ares Partners Holdco LLC is the sole member of each of Ares Voting LLC and Ares Management GP LLC, which together are the majority shareholders of Ares Management Corporation. Ares Management Corporation is the sole member of Ares Holdco LLC, which is the general partner of Ares Management Holdings LP, which is the sole member of Ares Management LLC, which is (a) the sole member of ACOF Investment Management LLC, which is the manager of the ACOF VI Funds, (b) the sole member of ASOF Investment Management LLC, which is the manager of the ASOF Funds and ASOF II Funds and (c) the general partner of ASSF Operating Manager IV, L.P., which is the manager of the ASSF Funds.

F6 · ownership.nature: Each of the foregoing entities may be deemed to share beneficial ownership of the securities reported herein, but each disclaims any such beneficial ownership of securities not held of record by them. Ares Partners Holdco LLC is managed by a board of managers, which is composed of Michael J Arougheti, Ryan Berry, R. Kipp deVeer, David B. Kaplan, Antony P. Ressler and Bennett Rosenthal (collectively, the "Board Members"). Mr. Ressler generally has veto authority over Board Members' decisions. Each of these individuals disclaims beneficial ownership of the securities that may be deemed to be beneficially owned by Ares Partners Holdco LLC.

SEC source: 0001104659-24-122126 · tm2429251-5_4seq1.xml · nonDerivative · entry 2

ARES MANAGEMENT LLC · CIK 0001259313 · 10% owner

ACOF VI Frontier AIV A1, L.P. · CIK 0001862494 · 10% owner

ACOF VI Frontier AIV A2, L.P. · CIK 0001862499 · 10% owner

ACOF VI Frontier AIV A3, L.P. · CIK 0001862534 · 10% owner

ACOF VI Frontier AIV A4, L.P. · CIK 0001862529 · 10% owner

ACOF VI Frontier AIV A5, L.P. · CIK 0001862526 · 10% owner

ACOF VI Frontier AIV A6, L.P. · CIK 0001862483 · 10% owner

ACOF VI Frontier AIV A7, L.P. · CIK 0001862482 · 10% owner

ACOF VI Frontier AIV A8, L.P. · CIK 0001862505 · 10% owner

ACOF VI Frontier AIV A9, L.P. · CIK 0001862533 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnotes

Disclosed balance after: 38,126,671

F1 · ownership.nature: Following the transactions reported herein, includes (i) 249,648 shares held by ACOF VI Frontier AIV A1, L.P.; (ii) 89,525 shares held by ACOF VI Frontier AIV A2, L.P.; (iii) 20,888 shares held by ACOF VI Frontier AIV A3, L.P.; (iv) 271,560 shares held by ACOF VI Frontier AIV A4, L.P.; (v) 298,417 shares held by ACOF VI Frontier AIV A5, L.P.; (vi) 167,115 shares held by ACOF VI Frontier AIV A6, L.P.; (vii) 302,427 shares held by ACOF VI Frontier AIV A7, L.P.; (viii) 303,790 shares held by ACOF VI Frontier AIV A8, L.P.; (ix) 285,289 shares held by ACOF VI Frontier AIV A9, L.P.; (x) 90,213 shares held by ACOF VI Frontier AIV A10, L.P.; (xi) 15,058,732 shares held by ACOF VI Frontier AIV B1, L.P. (together with the foregoing entities, the "ACOF VI Funds"); (continued in next footnote)

F2 · ownership.nature: (xii) 105,592 shares held by ASOF Frontier AIV A1, L.P.; (xiii) 18,032 shares held by ASOF Frontier AIV A2, L.P.; (xiv) 830,837 shares held by ASOF Frontier AIV A3, L.P.; (xv) 281,844 shares held by ASOF Frontier AIV A4, L.P.; (xvi) 167,160 shares held by ASOF Frontier AIV A5, L.P.; (xvii) 292,124 shares held by ASOF Frontier AIV A6, L.P.; (xviii) 289,417 shares held by ASOF Frontier AIV A7, L.P.; (xix) 238,026 shares held by ASOF Frontier AIV A8, L.P.; (xx) 360,644 shares held by ASOF Frontier AIV A9, L.P.; (xxi) 259,665 shares held by ASOF Frontier AIV A10, L.P.; (xxii) 245,236 shares held by ASOF Frontier AIV A11, L.P.; (xxiii) 9,597,579 shares held by ASOF Frontier AIV B1, L.P. (together with the foregoing entities, the "ASOF Funds"); (continued in next footnote)

F3 · ownership.nature: (xxiv) 2,003,418 shares held by ASOF II Frontier Holdings 1 L.P.; (xxv) 96,560 shares held by ASOF II Frontier Holdings 2 L.P.; (xxvi) 107,553 shares held by ASOF II Frontier Holdings 3 L.P.; (xxvii) 104,240 shares held by ASOF II Frontier Holdings 4 L.P.; (xxviii) 103,240 shares held by ASOF II Frontier Holdings 5 L.P.; (xxix) 109,407 shares held by ASOF II Frontier Holdings 6 L.P.; (xxx) 109,675 shares held by ASOF II Frontier Holdings 7 L.P.; (xxxi) 479,922 shares held by ASOF II A (DE) Frontier Holdings 1 L.P.; (xxxii) 17,664 shares held by ASOF II A (DE) Frontier Holdings 2 L.P. (together with the foregoing entities, the "ASOF II Funds"); (continued in next footnote)

F4 · ownership.nature: (xxxiii) 2,605,048 shares held by ASSF IV AIV B Holdings III, L.P. and (xxxiv) 2,566,184 shares held by ASSF IV AIV B, L.P. (together with the foregoing entity, the "ASSF Funds").

F5 · ownership.nature: Ares Partners Holdco LLC is the sole member of each of Ares Voting LLC and Ares Management GP LLC, which together are the majority shareholders of Ares Management Corporation. Ares Management Corporation is the sole member of Ares Holdco LLC, which is the general partner of Ares Management Holdings LP, which is the sole member of Ares Management LLC, which is (a) the sole member of ACOF Investment Management LLC, which is the manager of the ACOF VI Funds, (b) the sole member of ASOF Investment Management LLC, which is the manager of the ASOF Funds and ASOF II Funds and (c) the general partner of ASSF Operating Manager IV, L.P., which is the manager of the ASSF Funds.

F6 · ownership.nature: Each of the foregoing entities may be deemed to share beneficial ownership of the securities reported herein, but each disclaims any such beneficial ownership of securities not held of record by them. Ares Partners Holdco LLC is managed by a board of managers, which is composed of Michael J Arougheti, Ryan Berry, R. Kipp deVeer, David B. Kaplan, Antony P. Ressler and Bennett Rosenthal (collectively, the "Board Members"). Mr. Ressler generally has veto authority over Board Members' decisions. Each of these individuals disclaims beneficial ownership of the securities that may be deemed to be beneficially owned by Ares Partners Holdco LLC.

SEC source: 0001104659-24-122126 · tm2429251-5_4seq1.xml · nonDerivative · entry 1

ARES MANAGEMENT LLC · CIK 0001259313 · 10% owner

ACOF VI Frontier AIV A1, L.P. · CIK 0001862494 · 10% owner

ACOF VI Frontier AIV A2, L.P. · CIK 0001862499 · 10% owner

ACOF VI Frontier AIV A3, L.P. · CIK 0001862534 · 10% owner

ACOF VI Frontier AIV A4, L.P. · CIK 0001862529 · 10% owner

ACOF VI Frontier AIV A5, L.P. · CIK 0001862526 · 10% owner

ACOF VI Frontier AIV A6, L.P. · CIK 0001862483 · 10% owner

ACOF VI Frontier AIV A7, L.P. · CIK 0001862482 · 10% owner

ACOF VI Frontier AIV A8, L.P. · CIK 0001862505 · 10% owner

ACOF VI Frontier AIV A9, L.P. · CIK 0001862533 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnotes

Disclosed balance after: 38,365,866

F1 · ownership.nature: Following the transactions reported herein, includes (i) 249,648 shares held by ACOF VI Frontier AIV A1, L.P.; (ii) 89,525 shares held by ACOF VI Frontier AIV A2, L.P.; (iii) 20,888 shares held by ACOF VI Frontier AIV A3, L.P.; (iv) 271,560 shares held by ACOF VI Frontier AIV A4, L.P.; (v) 298,417 shares held by ACOF VI Frontier AIV A5, L.P.; (vi) 167,115 shares held by ACOF VI Frontier AIV A6, L.P.; (vii) 302,427 shares held by ACOF VI Frontier AIV A7, L.P.; (viii) 303,790 shares held by ACOF VI Frontier AIV A8, L.P.; (ix) 285,289 shares held by ACOF VI Frontier AIV A9, L.P.; (x) 90,213 shares held by ACOF VI Frontier AIV A10, L.P.; (xi) 15,058,732 shares held by ACOF VI Frontier AIV B1, L.P. (together with the foregoing entities, the "ACOF VI Funds"); (continued in next footnote)

F2 · ownership.nature: (xii) 105,592 shares held by ASOF Frontier AIV A1, L.P.; (xiii) 18,032 shares held by ASOF Frontier AIV A2, L.P.; (xiv) 830,837 shares held by ASOF Frontier AIV A3, L.P.; (xv) 281,844 shares held by ASOF Frontier AIV A4, L.P.; (xvi) 167,160 shares held by ASOF Frontier AIV A5, L.P.; (xvii) 292,124 shares held by ASOF Frontier AIV A6, L.P.; (xviii) 289,417 shares held by ASOF Frontier AIV A7, L.P.; (xix) 238,026 shares held by ASOF Frontier AIV A8, L.P.; (xx) 360,644 shares held by ASOF Frontier AIV A9, L.P.; (xxi) 259,665 shares held by ASOF Frontier AIV A10, L.P.; (xxii) 245,236 shares held by ASOF Frontier AIV A11, L.P.; (xxiii) 9,597,579 shares held by ASOF Frontier AIV B1, L.P. (together with the foregoing entities, the "ASOF Funds"); (continued in next footnote)

F3 · ownership.nature: (xxiv) 2,003,418 shares held by ASOF II Frontier Holdings 1 L.P.; (xxv) 96,560 shares held by ASOF II Frontier Holdings 2 L.P.; (xxvi) 107,553 shares held by ASOF II Frontier Holdings 3 L.P.; (xxvii) 104,240 shares held by ASOF II Frontier Holdings 4 L.P.; (xxviii) 103,240 shares held by ASOF II Frontier Holdings 5 L.P.; (xxix) 109,407 shares held by ASOF II Frontier Holdings 6 L.P.; (xxx) 109,675 shares held by ASOF II Frontier Holdings 7 L.P.; (xxxi) 479,922 shares held by ASOF II A (DE) Frontier Holdings 1 L.P.; (xxxii) 17,664 shares held by ASOF II A (DE) Frontier Holdings 2 L.P. (together with the foregoing entities, the "ASOF II Funds"); (continued in next footnote)

F4 · ownership.nature: (xxxiii) 2,605,048 shares held by ASSF IV AIV B Holdings III, L.P. and (xxxiv) 2,566,184 shares held by ASSF IV AIV B, L.P. (together with the foregoing entity, the "ASSF Funds").

F5 · ownership.nature: Ares Partners Holdco LLC is the sole member of each of Ares Voting LLC and Ares Management GP LLC, which together are the majority shareholders of Ares Management Corporation. Ares Management Corporation is the sole member of Ares Holdco LLC, which is the general partner of Ares Management Holdings LP, which is the sole member of Ares Management LLC, which is (a) the sole member of ACOF Investment Management LLC, which is the manager of the ACOF VI Funds, (b) the sole member of ASOF Investment Management LLC, which is the manager of the ASOF Funds and ASOF II Funds and (c) the general partner of ASSF Operating Manager IV, L.P., which is the manager of the ASSF Funds.

F6 · ownership.nature: Each of the foregoing entities may be deemed to share beneficial ownership of the securities reported herein, but each disclaims any such beneficial ownership of securities not held of record by them. Ares Partners Holdco LLC is managed by a board of managers, which is composed of Michael J Arougheti, Ryan Berry, R. Kipp deVeer, David B. Kaplan, Antony P. Ressler and Bennett Rosenthal (collectively, the "Board Members"). Mr. Ressler generally has veto authority over Board Members' decisions. Each of these individuals disclaims beneficial ownership of the securities that may be deemed to be beneficially owned by Ares Partners Holdco LLC.

SEC source: 0001104659-24-121154 · tm2429046-5_4seq1.xml · nonDerivative · entry 2

ARES MANAGEMENT LLC · CIK 0001259313 · 10% owner

ACOF VI Frontier AIV A1, L.P. · CIK 0001862494 · 10% owner

ACOF VI Frontier AIV A2, L.P. · CIK 0001862499 · 10% owner

ACOF VI Frontier AIV A3, L.P. · CIK 0001862534 · 10% owner

ACOF VI Frontier AIV A4, L.P. · CIK 0001862529 · 10% owner

ACOF VI Frontier AIV A5, L.P. · CIK 0001862526 · 10% owner

ACOF VI Frontier AIV A6, L.P. · CIK 0001862483 · 10% owner

ACOF VI Frontier AIV A7, L.P. · CIK 0001862482 · 10% owner

ACOF VI Frontier AIV A8, L.P. · CIK 0001862505 · 10% owner

ACOF VI Frontier AIV A9, L.P. · CIK 0001862533 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnotes

Disclosed balance after: 38,606,806

F1 · ownership.nature: Following the transactions reported herein, includes (i) 255,021 shares held by ACOF VI Frontier AIV A1, L.P.; (ii) 91,452 shares held by ACOF VI Frontier AIV A2, L.P.; (iii) 21,338 shares held by ACOF VI Frontier AIV A3, L.P.; (iv) 277,405 shares held by ACOF VI Frontier AIV A4, L.P.; (v) 304,840 shares held by ACOF VI Frontier AIV A5, L.P.; (vi) 170,712 shares held by ACOF VI Frontier AIV A6, L.P.; (vii) 308,936 shares held by ACOF VI Frontier AIV A7, L.P.; (viii) 310,328 shares held by ACOF VI Frontier AIV A8, L.P.; (ix) 291,429 shares held by ACOF VI Frontier AIV A9, L.P.; (x) 92,154 shares held by ACOF VI Frontier AIV A10, L.P.; (xi) 15,382,829 shares held by ACOF VI Frontier AIV B1, L.P. (together with the foregoing entities, the "ACOF VI Funds"); (continued in next footnote)

F2 · ownership.nature: (xii) 105,592 shares held by ASOF Frontier AIV A1, L.P.; (xiii) 18,032 shares held by ASOF Frontier AIV A2, L.P.; (xiv) 830,837 shares held by ASOF Frontier AIV A3, L.P.; (xv) 281,844 shares held by ASOF Frontier AIV A4, L.P.; (xvi) 167,160 shares held by ASOF Frontier AIV A5, L.P.; (xvii) 292,124 shares held by ASOF Frontier AIV A6, L.P.; (xviii) 289,417 shares held by ASOF Frontier AIV A7, L.P.; (xix) 238,026 shares held by ASOF Frontier AIV A8, L.P.; (xx) 360,644 shares held by ASOF Frontier AIV A9, L.P.; (xxi) 259,665 shares held by ASOF Frontier AIV A10, L.P.; (xxii) 245,236 shares held by ASOF Frontier AIV A11, L.P.; (xxiii) 9,597,579 shares held by ASOF Frontier AIV B1, L.P. (together with the foregoing entities, the "ASOF Funds"); (continued in next footnote)

F3 · ownership.nature: (xxiv) 2,003,418 shares held by ASOF II Frontier Holdings 1 L.P.; (xxv) 96,560 shares held by ASOF II Frontier Holdings 2 L.P.; (xxvi) 107,553 shares held by ASOF II Frontier Holdings 3 L.P.; (xxvii) 104,240 shares held by ASOF II Frontier Holdings 4 L.P.; (xxviii) 103,240 shares held by ASOF II Frontier Holdings 5 L.P.; (xxix) 109,407 shares held by ASOF II Frontier Holdings 6 L.P.; (xxx) 109,675 shares held by ASOF II Frontier Holdings 7 L.P.; (xxxi) 479,922 shares held by ASOF II A (DE) Frontier Holdings 1 L.P.; (xxxii) 17,664 shares held by ASOF II A (DE) Frontier Holdings 2 L.P. (together with the foregoing entities, the "ASOF II Funds"); (continued in next footnote)

F4 · ownership.nature: (xxxiii) 2,661,114 shares held by ASSF IV AIV B Holdings III, L.P. and (xxxiv) 2,621,413 shares held by ASSF IV AIV B, L.P. (together with the foregoing entity, the "ASSF Funds").

F5 · ownership.nature: Ares Partners Holdco LLC is the sole member of each of Ares Voting LLC and Ares Management GP LLC, which together are the majority shareholders of Ares Management Corporation. Ares Management Corporation is the sole member of Ares Holdco LLC, which is the general partner of Ares Management Holdings LP, which is the sole member of Ares Management LLC, which is (a) the sole member of ACOF Investment Management LLC, which is the manager of the ACOF VI Funds, (b) the sole member of ASOF Investment Management LLC, which is the manager of the ASOF Funds and ASOF II Funds and (c) the general partner of ASSF Operating Manager IV, L.P., which is the manager of the ASSF Funds.

F6 · ownership.nature: Each of the foregoing entities may be deemed to share beneficial ownership of the securities reported herein, but each disclaims any such beneficial ownership of securities not held of record by them. Ares Partners Holdco LLC is managed by a board of managers, which is composed of Michael J Arougheti, Ryan Berry, R. Kipp deVeer, David B. Kaplan, Antony P. Ressler and Bennett Rosenthal (collectively, the "Board Members"). Mr. Ressler generally has veto authority over Board Members' decisions. Each of these individuals disclaims beneficial ownership of the securities that may be deemed to be beneficially owned by Ares Partners Holdco LLC.

SEC source: 0001104659-24-121154 · tm2429046-5_4seq1.xml · nonDerivative · entry 1

ARES MANAGEMENT LLC · CIK 0001259313 · 10% owner

ACOF VI Frontier AIV A1, L.P. · CIK 0001862494 · 10% owner

ACOF VI Frontier AIV A2, L.P. · CIK 0001862499 · 10% owner

ACOF VI Frontier AIV A3, L.P. · CIK 0001862534 · 10% owner

ACOF VI Frontier AIV A4, L.P. · CIK 0001862529 · 10% owner

ACOF VI Frontier AIV A5, L.P. · CIK 0001862526 · 10% owner

ACOF VI Frontier AIV A6, L.P. · CIK 0001862483 · 10% owner

ACOF VI Frontier AIV A7, L.P. · CIK 0001862482 · 10% owner

ACOF VI Frontier AIV A8, L.P. · CIK 0001862505 · 10% owner

ACOF VI Frontier AIV A9, L.P. · CIK 0001862533 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnotes

Disclosed balance after: 38,802,972

F1 · ownership.nature: Following the transactions reported herein, includes (i) 255,021 shares held by ACOF VI Frontier AIV A1, L.P.; (ii) 91,452 shares held by ACOF VI Frontier AIV A2, L.P.; (iii) 21,338 shares held by ACOF VI Frontier AIV A3, L.P.; (iv) 277,405 shares held by ACOF VI Frontier AIV A4, L.P.; (v) 304,840 shares held by ACOF VI Frontier AIV A5, L.P.; (vi) 170,712 shares held by ACOF VI Frontier AIV A6, L.P.; (vii) 308,936 shares held by ACOF VI Frontier AIV A7, L.P.; (viii) 310,328 shares held by ACOF VI Frontier AIV A8, L.P.; (ix) 291,429 shares held by ACOF VI Frontier AIV A9, L.P.; (x) 92,154 shares held by ACOF VI Frontier AIV A10, L.P.; (xi) 15,382,829 shares held by ACOF VI Frontier AIV B1, L.P. (together with the foregoing entities, the "ACOF VI Funds"); (continued in next footnote)

F2 · ownership.nature: (xii) 105,592 shares held by ASOF Frontier AIV A1, L.P.; (xiii) 18,032 shares held by ASOF Frontier AIV A2, L.P.; (xiv) 830,837 shares held by ASOF Frontier AIV A3, L.P.; (xv) 281,844 shares held by ASOF Frontier AIV A4, L.P.; (xvi) 167,160 shares held by ASOF Frontier AIV A5, L.P.; (xvii) 292,124 shares held by ASOF Frontier AIV A6, L.P.; (xviii) 289,417 shares held by ASOF Frontier AIV A7, L.P.; (xix) 238,026 shares held by ASOF Frontier AIV A8, L.P.; (xx) 360,644 shares held by ASOF Frontier AIV A9, L.P.; (xxi) 259,665 shares held by ASOF Frontier AIV A10, L.P.; (xxii) 245,236 shares held by ASOF Frontier AIV A11, L.P.; (xxiii) 9,597,579 shares held by ASOF Frontier AIV B1, L.P. (together with the foregoing entities, the "ASOF Funds"); (continued in next footnote)

F3 · ownership.nature: (xxiv) 2,003,418 shares held by ASOF II Frontier Holdings 1 L.P.; (xxv) 96,560 shares held by ASOF II Frontier Holdings 2 L.P.; (xxvi) 107,553 shares held by ASOF II Frontier Holdings 3 L.P.; (xxvii) 104,240 shares held by ASOF II Frontier Holdings 4 L.P.; (xxviii) 103,240 shares held by ASOF II Frontier Holdings 5 L.P.; (xxix) 109,407 shares held by ASOF II Frontier Holdings 6 L.P.; (xxx) 109,675 shares held by ASOF II Frontier Holdings 7 L.P.; (xxxi) 479,922 shares held by ASOF II A (DE) Frontier Holdings 1 L.P.; (xxxii) 17,664 shares held by ASOF II A (DE) Frontier Holdings 2 L.P. (together with the foregoing entities, the "ASOF II Funds"); (continued in next footnote)

F4 · ownership.nature: (xxxiii) 2,661,114 shares held by ASSF IV AIV B Holdings III, L.P. and (xxxiv) 2,621,413 shares held by ASSF IV AIV B, L.P. (together with the foregoing entity, the "ASSF Funds").

F5 · ownership.nature: Ares Partners Holdco LLC is the sole member of each of Ares Voting LLC and Ares Management GP LLC, which together are the majority shareholders of Ares Management Corporation. Ares Management Corporation is the sole member of Ares Holdco LLC, which is the general partner of Ares Management Holdings LP, which is the sole member of Ares Management LLC, which is (a) the sole member of ACOF Investment Management LLC, which is the manager of the ACOF VI Funds, (b) the sole member of ASOF Investment Management LLC, which is the manager of the ASOF Funds and ASOF II Funds and (c) the general partner of ASSF Operating Manager IV, L.P., which is the manager of the ASSF Funds.

F6 · ownership.nature: Each of the foregoing entities may be deemed to share beneficial ownership of the securities reported herein, but each disclaims any such beneficial ownership of securities not held of record by them. Ares Partners Holdco LLC is managed by a board of managers, which is composed of Michael J Arougheti, Ryan Berry, R. Kipp deVeer, David B. Kaplan, Antony P. Ressler and Bennett Rosenthal (collectively, the "Board Members"). Mr. Ressler generally has veto authority over Board Members' decisions. Each of these individuals disclaims beneficial ownership of the securities that may be deemed to be beneficially owned by Ares Partners Holdco LLC.

SEC source: 0001104659-23-110578 · tm2328808d1_4seq1.xml · nonDerivative · entry 1

ARES MANAGEMENT LLC · CIK 0001259313 · 10% owner

ACOF VI Frontier AIV A1, L.P. · CIK 0001862494 · 10% owner

ACOF VI Frontier AIV A2, L.P. · CIK 0001862499 · 10% owner

ACOF VI Frontier AIV A3, L.P. · CIK 0001862534 · 10% owner

ACOF VI Frontier AIV A4, L.P. · CIK 0001862529 · 10% owner

ACOF VI Frontier AIV A5, L.P. · CIK 0001862526 · 10% owner

ACOF VI Frontier AIV A6, L.P. · CIK 0001862483 · 10% owner

ACOF VI Frontier AIV A7, L.P. · CIK 0001862482 · 10% owner

ACOF VI Frontier AIV A8, L.P. · CIK 0001862505 · 10% owner

ACOF VI Frontier AIV A9, L.P. · CIK 0001862533 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnotes

Disclosed balance after: 38,912,895

F1 · balance_after: This statement is being filed by ACOF VI Frontier AIV A1, L.P. ("ACOF VI Frontier AIV A1"), ACOF VI Frontier AIV A2, L.P. ("ACOF VI Frontier AIV A2"), ACOF VI Frontier AIV A3, L.P. ("ACOF VI Frontier AIV A3"), ACOF VI Frontier AIV A4, L.P. ("ACOF VI Frontier AIV A4"), ACOF VI Frontier AIV A5, L.P. ("ACOF VI Frontier AIV A5"), ACOF VI Frontier AIV A6, L.P. ("ACOF VI Frontier AIV A6"), ACOF VI Frontier AIV A7, L.P. ("ACOF VI Frontier AIV A7"), ACOF VI Frontier AIV A8, L.P. ("ACOF VI Frontier AIV A8"), ACOF VI Frontier AIV A9, L.P. ("ACOF VI Frontier AIV A9"), ACOF VI Frontier AIV A10, L.P. ("ACOF VI Frontier AIV A10"), and ACOF VI Frontier AIV B1, L.P. ("ACOF VI Frontier AIV B1", together with the foregoing entities, the "ACOF Funds"), (continued in next footnote)

F2 · balance_after: ASOF Frontier AIV A1, L.P. ("ASOF Frontier AIV A1"), ASOF Frontier AIV A2, L.P. ("ASOF Frontier AIV A2"), ASOF Frontier AIV A3, L.P. ("ASOF Frontier AIV A3"), ASOF Frontier AIV A4, L.P. ("ASOF Frontier AIV A4"), ASOF Frontier AIV A5, L.P. ("ASOF Frontier AIV A5"), ASOF Frontier AIV A6, L.P. ("ASOF Frontier AIV A6"), ASOF Frontier AIV A7, L.P. ("ASOF Frontier AIV A7"), ASOF Frontier AIV A8, L.P. ("ASOF Frontier AIV A8"), ASOF Frontier AIV A9, L.P. ("ASOF Frontier AIV A9"), ASOF Frontier AIV A10, L.P. ("ASOF Frontier AIV A10"), ASOF Frontier AIV A11, L.P. ("ASOF Frontier AIV A11"), ASOF Frontier AIV B1, L.P. ("ASOF Frontier AIV B1"), (continued in next footnote)

F3 · balance_after: ASOF II Frontier Holdings 1 L.P. ("ASOF II Frontier Holdings 1"), ASOF II Frontier Holdings 2 L.P. ("ASOF II Frontier Holdings 2"), ASOF II Frontier Holdings 3 L.P. ("ASOF II Frontier Holdings 3"), ASOF II Frontier Holdings 4 L.P. ("ASOF II Frontier Holdings 4"), ASOF II Frontier Holdings 5 L.P. ("ASOF II Frontier Holdings 5"), ASOF II Frontier Holdings 6 L.P. ("ASOF II Frontier Holdings 6"), (continued in next footnote)

F4 · balance_after: ASOF II Frontier Holdings 7 L.P. ("ASOF II Frontier Holdings 7"), ASOF II A (DE) Frontier Holdings 1 L.P. ("ASOF II A (DE) Frontier Holdings 1") and ASOF II A (DE) Frontier Holdings 2 L.P. ("ASOF II A (DE) Frontier Holdings 2", and together with ASOF Frontier AIV A1, ASOF Frontier AIV A2, ASOF Frontier AIV A3, ASOF Frontier AIV A4, ASOF Frontier AIV A5, ASOF Frontier AIV A6, ASOF Frontier AIV A7, ASOF Frontier AIV A8, ASOF Frontier AIV A9, ASOF Frontier AIV A10, and ASOF Frontier AIV A11, ASOF II Frontier Holdings 1, ASOF II Frontier Holdings 2, ASOF II Frontier Holdings 3, ASOF II Frontier Holdings 4, ASOF II Frontier Holdings 5, ASOF II Frontier Holdings 6, ASOF II Frontier Holdings 7 and ASOF II A (DE) Frontier Holdings 1, the "ASOF Funds"), (continued in next footnote)

F5 · balance_after: ASSF IV AIV B Holdings III, L.P. ("ASSF IV AIV B Holdings III"), ASSF IV AIV B, L.P. ("ASSF IV AIV B", and together with ASSF IV AIV B Holdings III, the "ASSF Funds"), ACOF Investment Management LLC ("ACOF Investment Management"), ASOF Investment Management LLC ("ASOF Investment Management"), ASSF Operating Manager IV, L.P. ("ASSF Operating Manager IV"), (continued in next footnote)

F6 · balance_after: Ares Management LLC, Ares Management Holdings L.P. ("Ares Management Holdings"), Ares Holdco LLC ("Ares Holdco"), Ares Management Corporation ("Ares Management"), Ares Management GP LLC ("Ares Management GP"), Ares Voting LLC ("Ares Voting") and Ares Partners Holdco LLC ("Ares Partners", and together with the ACOF Funds, the ASOF Funds, the ASSF Funds, ACOF Investment Management, ASOF Investment Management, ASSF Operating Manager IV, Ares Management LLC, Ares Management Holdings, Ares Holdco, Ares Management, Ares Management GP, and Ares Voting, the "Reporting Persons"). Due to the electronic system's limitation of 10 Reporting Persons per joint filing, this statement is being filed in five parts.

F7 · balance_after: The Reporting Persons collectively beneficially own, or may be deemed to beneficially own, in the aggregate 38,912,895 shares of Common Stock by reason of the direct or indirect beneficial ownership of such shares as follows: (i) ACOF VI Frontier AIV A1 owns 258,196 shares of Common Stock; (ii) ACOF VI Frontier AIV A2 owns 92,590 shares of Common Stock; (iii) ACOF VI Frontier AIV A3 owns 21,604 shares of Common Stock; (iv) ACOF VI Frontier AIV A4 owns 280,859 shares of Common Stock; (v) ACOF VI Frontier AIV A5 owns 308,635 shares of Common Stock; (vi) ACOF VI Frontier AIV A6 owns 172,837 shares of Common Stock; (vii) ACOF VI Frontier AIV A7 owns 312,782 shares of Common Stock; (viii) ACOF VI Frontier AIV A8 owns 314,191 shares of Common Stock; (ix) ACOF VI Frontier AIV A9 owns 295,057 shares of Common Stock; (x) ACOF VI Frontier AIV A10 owns 93,301 shares of Common Stock; (xi) ACOF VI Frontier AIV B1 owns 15,574,332 shares of Common Stock; (continued in next footnote)

F8 · balance_after: (xii) ASOF Frontier AIV A1 owns 105,592 shares of Common Stock; (xiii) ASOF Frontier AIV A2 owns 18,032 shares of Common Stock; (xiv) ASOF Frontier AIV A3 owns 830,837 shares of Common Stock; (xv) ASOF Frontier AIV A4 owns 281,844 shares of Common Stock; (xvi) ASOF Frontier AIV A5 owns 167,160 shares of Common Stock; (xvii) ASOF Frontier AIV A6 owns 292,124 shares of Common Stock; (xviii) ASOF Frontier AIV A7 owns 289,417 shares of Common Stock; (xix) ASOF Frontier AIV A8 owns 238,026 shares of Common Stock; (xx) ASOF Frontier AIV A9 owns 360,644 shares of Common Stock; (xxi) ASOF Frontier AIV A10 owns 259,665 shares of Common Stock; (xxii) ASOF Frontier AIV A11 owns 245,236 shares of Common Stock; (xxiii) ASOF Frontier AIV B1 owns 9,597,579 shares of Common Stock; (continued in next footnote)

F9 · balance_after: (xxiv) ASOF II Frontier Holdings 1 owns 2,003,418 shares of Common Stock, (xxv) ASOF II Frontier Holdings 2 owns 96,560 shares of Common Stock, (xxvi) ASOF II Frontier Holdings 3 owns 107,553 shares of Common Stock, (xxvii) ASOF II Frontier Holdings 4 owns 104,240 shares of Common Stock, (xxviii) ASOF II Frontier Holdings 5 owns 103,240 shares of Common Stock, (xxix) ASOF II Frontier Holdings 6 owns 109,407 shares of Common Stock, (xxx) ASOF II Frontier Holdings 7 owns 109,675 shares of Common Stock, (xxxi) ASOF II A (DE) Frontier Holdings 1 owns 479,922 shares of Common Stock; (xxxii) ASOF II A (DE) Frontier Holdings 2 owns 17,664 shares of Common Stock; (xxxiii) ASSF IV AIV B Holdings III owns 2,694,243 shares of Common Stock and (xxxiv) ASSF IV AIV B directly or indirectly owns 5,348,289 shares of Common Stock.

F10 · balance_after: Ares Partners is the sole member of each of Ares Voting and Ares Management GP, which are respectively the holders of the Class B and Class C common stock of Ares Management, which common stock allows them, collectively, to generally have the majority of the votes on any matter submitted to the stockholders of Ares Management if certain conditions are met. Ares Management is the sole member of Ares Holdco, which is the general partner of Ares Management Holdings, which is the sole member of Ares Management LLC, which is: (a) the sole member of ACOF Investment Management, which is the manager of the ACOF Funds, (b) the sole member of ASOF Investment Management, which is the manager of the ASOF Funds, and (c) the general partner of ASSF Operating Manager IV, which is the manager of the ASSF Funds.

F11 · balance_after: Ares Partners is managed by a board of managers, which is composed of Michael J Arougheti, Ryan Berry, R. Kipp deVeer, David B. Kaplan, Antony P. Ressler and Bennett Rosenthal (collectively, the "Board Members"). Mr. Ressler generally has veto authority over Board Members' decisions.

F12 · balance_after: Each of the Reporting Persons, and the Board Members, and the other directors, officers, partners, stockholders, members and managers of the Reporting Persons, expressly disclaims beneficial ownership of the Common Stock, except to the extent of any pecuniary interest therein, and this Form 4 shall not be deemed an admission that any such person or entity is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purposes.

F1 · ownership.nature: This statement is being filed by ACOF VI Frontier AIV A1, L.P. ("ACOF VI Frontier AIV A1"), ACOF VI Frontier AIV A2, L.P. ("ACOF VI Frontier AIV A2"), ACOF VI Frontier AIV A3, L.P. ("ACOF VI Frontier AIV A3"), ACOF VI Frontier AIV A4, L.P. ("ACOF VI Frontier AIV A4"), ACOF VI Frontier AIV A5, L.P. ("ACOF VI Frontier AIV A5"), ACOF VI Frontier AIV A6, L.P. ("ACOF VI Frontier AIV A6"), ACOF VI Frontier AIV A7, L.P. ("ACOF VI Frontier AIV A7"), ACOF VI Frontier AIV A8, L.P. ("ACOF VI Frontier AIV A8"), ACOF VI Frontier AIV A9, L.P. ("ACOF VI Frontier AIV A9"), ACOF VI Frontier AIV A10, L.P. ("ACOF VI Frontier AIV A10"), and ACOF VI Frontier AIV B1, L.P. ("ACOF VI Frontier AIV B1", together with the foregoing entities, the "ACOF Funds"), (continued in next footnote)

F2 · ownership.nature: ASOF Frontier AIV A1, L.P. ("ASOF Frontier AIV A1"), ASOF Frontier AIV A2, L.P. ("ASOF Frontier AIV A2"), ASOF Frontier AIV A3, L.P. ("ASOF Frontier AIV A3"), ASOF Frontier AIV A4, L.P. ("ASOF Frontier AIV A4"), ASOF Frontier AIV A5, L.P. ("ASOF Frontier AIV A5"), ASOF Frontier AIV A6, L.P. ("ASOF Frontier AIV A6"), ASOF Frontier AIV A7, L.P. ("ASOF Frontier AIV A7"), ASOF Frontier AIV A8, L.P. ("ASOF Frontier AIV A8"), ASOF Frontier AIV A9, L.P. ("ASOF Frontier AIV A9"), ASOF Frontier AIV A10, L.P. ("ASOF Frontier AIV A10"), ASOF Frontier AIV A11, L.P. ("ASOF Frontier AIV A11"), ASOF Frontier AIV B1, L.P. ("ASOF Frontier AIV B1"), (continued in next footnote)

F3 · ownership.nature: ASOF II Frontier Holdings 1 L.P. ("ASOF II Frontier Holdings 1"), ASOF II Frontier Holdings 2 L.P. ("ASOF II Frontier Holdings 2"), ASOF II Frontier Holdings 3 L.P. ("ASOF II Frontier Holdings 3"), ASOF II Frontier Holdings 4 L.P. ("ASOF II Frontier Holdings 4"), ASOF II Frontier Holdings 5 L.P. ("ASOF II Frontier Holdings 5"), ASOF II Frontier Holdings 6 L.P. ("ASOF II Frontier Holdings 6"), (continued in next footnote)

F4 · ownership.nature: ASOF II Frontier Holdings 7 L.P. ("ASOF II Frontier Holdings 7"), ASOF II A (DE) Frontier Holdings 1 L.P. ("ASOF II A (DE) Frontier Holdings 1") and ASOF II A (DE) Frontier Holdings 2 L.P. ("ASOF II A (DE) Frontier Holdings 2", and together with ASOF Frontier AIV A1, ASOF Frontier AIV A2, ASOF Frontier AIV A3, ASOF Frontier AIV A4, ASOF Frontier AIV A5, ASOF Frontier AIV A6, ASOF Frontier AIV A7, ASOF Frontier AIV A8, ASOF Frontier AIV A9, ASOF Frontier AIV A10, and ASOF Frontier AIV A11, ASOF II Frontier Holdings 1, ASOF II Frontier Holdings 2, ASOF II Frontier Holdings 3, ASOF II Frontier Holdings 4, ASOF II Frontier Holdings 5, ASOF II Frontier Holdings 6, ASOF II Frontier Holdings 7 and ASOF II A (DE) Frontier Holdings 1, the "ASOF Funds"), (continued in next footnote)

F5 · ownership.nature: ASSF IV AIV B Holdings III, L.P. ("ASSF IV AIV B Holdings III"), ASSF IV AIV B, L.P. ("ASSF IV AIV B", and together with ASSF IV AIV B Holdings III, the "ASSF Funds"), ACOF Investment Management LLC ("ACOF Investment Management"), ASOF Investment Management LLC ("ASOF Investment Management"), ASSF Operating Manager IV, L.P. ("ASSF Operating Manager IV"), (continued in next footnote)

F6 · ownership.nature: Ares Management LLC, Ares Management Holdings L.P. ("Ares Management Holdings"), Ares Holdco LLC ("Ares Holdco"), Ares Management Corporation ("Ares Management"), Ares Management GP LLC ("Ares Management GP"), Ares Voting LLC ("Ares Voting") and Ares Partners Holdco LLC ("Ares Partners", and together with the ACOF Funds, the ASOF Funds, the ASSF Funds, ACOF Investment Management, ASOF Investment Management, ASSF Operating Manager IV, Ares Management LLC, Ares Management Holdings, Ares Holdco, Ares Management, Ares Management GP, and Ares Voting, the "Reporting Persons"). Due to the electronic system's limitation of 10 Reporting Persons per joint filing, this statement is being filed in five parts.

F7 · ownership.nature: The Reporting Persons collectively beneficially own, or may be deemed to beneficially own, in the aggregate 38,912,895 shares of Common Stock by reason of the direct or indirect beneficial ownership of such shares as follows: (i) ACOF VI Frontier AIV A1 owns 258,196 shares of Common Stock; (ii) ACOF VI Frontier AIV A2 owns 92,590 shares of Common Stock; (iii) ACOF VI Frontier AIV A3 owns 21,604 shares of Common Stock; (iv) ACOF VI Frontier AIV A4 owns 280,859 shares of Common Stock; (v) ACOF VI Frontier AIV A5 owns 308,635 shares of Common Stock; (vi) ACOF VI Frontier AIV A6 owns 172,837 shares of Common Stock; (vii) ACOF VI Frontier AIV A7 owns 312,782 shares of Common Stock; (viii) ACOF VI Frontier AIV A8 owns 314,191 shares of Common Stock; (ix) ACOF VI Frontier AIV A9 owns 295,057 shares of Common Stock; (x) ACOF VI Frontier AIV A10 owns 93,301 shares of Common Stock; (xi) ACOF VI Frontier AIV B1 owns 15,574,332 shares of Common Stock; (continued in next footnote)

F8 · ownership.nature: (xii) ASOF Frontier AIV A1 owns 105,592 shares of Common Stock; (xiii) ASOF Frontier AIV A2 owns 18,032 shares of Common Stock; (xiv) ASOF Frontier AIV A3 owns 830,837 shares of Common Stock; (xv) ASOF Frontier AIV A4 owns 281,844 shares of Common Stock; (xvi) ASOF Frontier AIV A5 owns 167,160 shares of Common Stock; (xvii) ASOF Frontier AIV A6 owns 292,124 shares of Common Stock; (xviii) ASOF Frontier AIV A7 owns 289,417 shares of Common Stock; (xix) ASOF Frontier AIV A8 owns 238,026 shares of Common Stock; (xx) ASOF Frontier AIV A9 owns 360,644 shares of Common Stock; (xxi) ASOF Frontier AIV A10 owns 259,665 shares of Common Stock; (xxii) ASOF Frontier AIV A11 owns 245,236 shares of Common Stock; (xxiii) ASOF Frontier AIV B1 owns 9,597,579 shares of Common Stock; (continued in next footnote)

F9 · ownership.nature: (xxiv) ASOF II Frontier Holdings 1 owns 2,003,418 shares of Common Stock, (xxv) ASOF II Frontier Holdings 2 owns 96,560 shares of Common Stock, (xxvi) ASOF II Frontier Holdings 3 owns 107,553 shares of Common Stock, (xxvii) ASOF II Frontier Holdings 4 owns 104,240 shares of Common Stock, (xxviii) ASOF II Frontier Holdings 5 owns 103,240 shares of Common Stock, (xxix) ASOF II Frontier Holdings 6 owns 109,407 shares of Common Stock, (xxx) ASOF II Frontier Holdings 7 owns 109,675 shares of Common Stock, (xxxi) ASOF II A (DE) Frontier Holdings 1 owns 479,922 shares of Common Stock; (xxxii) ASOF II A (DE) Frontier Holdings 2 owns 17,664 shares of Common Stock; (xxxiii) ASSF IV AIV B Holdings III owns 2,694,243 shares of Common Stock and (xxxiv) ASSF IV AIV B directly or indirectly owns 5,348,289 shares of Common Stock.

F10 · ownership.nature: Ares Partners is the sole member of each of Ares Voting and Ares Management GP, which are respectively the holders of the Class B and Class C common stock of Ares Management, which common stock allows them, collectively, to generally have the majority of the votes on any matter submitted to the stockholders of Ares Management if certain conditions are met. Ares Management is the sole member of Ares Holdco, which is the general partner of Ares Management Holdings, which is the sole member of Ares Management LLC, which is: (a) the sole member of ACOF Investment Management, which is the manager of the ACOF Funds, (b) the sole member of ASOF Investment Management, which is the manager of the ASOF Funds, and (c) the general partner of ASSF Operating Manager IV, which is the manager of the ASSF Funds.

F11 · ownership.nature: Ares Partners is managed by a board of managers, which is composed of Michael J Arougheti, Ryan Berry, R. Kipp deVeer, David B. Kaplan, Antony P. Ressler and Bennett Rosenthal (collectively, the "Board Members"). Mr. Ressler generally has veto authority over Board Members' decisions.

F12 · ownership.nature: Each of the Reporting Persons, and the Board Members, and the other directors, officers, partners, stockholders, members and managers of the Reporting Persons, expressly disclaims beneficial ownership of the Common Stock, except to the extent of any pecuniary interest therein, and this Form 4 shall not be deemed an admission that any such person or entity is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purposes.

SEC source: 0001104659-23-106828 · tm2327547-1_4seq1.xml · nonDerivative · entry 1

ARES MANAGEMENT LLC · CIK 0001259313 · 10% owner

ACOF VI Frontier AIV A1, L.P. · CIK 0001862494 · 10% owner

ACOF VI Frontier AIV A2, L.P. · CIK 0001862499 · 10% owner

ACOF VI Frontier AIV A3, L.P. · CIK 0001862534 · 10% owner

ACOF VI Frontier AIV A4, L.P. · CIK 0001862529 · 10% owner

ACOF VI Frontier AIV A5, L.P. · CIK 0001862526 · 10% owner

ACOF VI Frontier AIV A6, L.P. · CIK 0001862483 · 10% owner

ACOF VI Frontier AIV A7, L.P. · CIK 0001862482 · 10% owner

ACOF VI Frontier AIV A8, L.P. · CIK 0001862505 · 10% owner

ACOF VI Frontier AIV A9, L.P. · CIK 0001862533 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnotes

Disclosed balance after: 38,762,895

F1 · balance_after: This statement is being filed by ACOF VI Frontier AIV A1, L.P. ("ACOF VI Frontier AIV A1"), ACOF VI Frontier AIV A2, L.P. ("ACOF VI Frontier AIV A2"), ACOF VI Frontier AIV A3, L.P. ("ACOF VI Frontier AIV A3"), ACOF VI Frontier AIV A4, L.P. ("ACOF VI Frontier AIV A4"), ACOF VI Frontier AIV A5, L.P. ("ACOF VI Frontier AIV A5"), ACOF VI Frontier AIV A6, L.P. ("ACOF VI Frontier AIV A6"), ACOF VI Frontier AIV A7, L.P. ("ACOF VI Frontier AIV A7"), ACOF VI Frontier AIV A8, L.P. ("ACOF VI Frontier AIV A8"), ACOF VI Frontier AIV A9, L.P. ("ACOF VI Frontier AIV A9"), ACOF VI Frontier AIV A10, L.P. ("ACOF VI Frontier AIV A10"), and ACOF VI Frontier AIV B1, L.P. ("ACOF VI Frontier AIV B1", together with the foregoing entities, the "ACOF Funds"), (continued in next footnote)

F2 · balance_after: ASOF Frontier AIV A1, L.P. ("ASOF Frontier AIV A1"), ASOF Frontier AIV A2, L.P. ("ASOF Frontier AIV A2"), ASOF Frontier AIV A3, L.P. ("ASOF Frontier AIV A3"), ASOF Frontier AIV A4, L.P. ("ASOF Frontier AIV A4"), ASOF Frontier AIV A5, L.P. ("ASOF Frontier AIV A5"), ASOF Frontier AIV A6, L.P. ("ASOF Frontier AIV A6"), ASOF Frontier AIV A7, L.P. ("ASOF Frontier AIV A7"), ASOF Frontier AIV A8, L.P. ("ASOF Frontier AIV A8"), ASOF Frontier AIV A9, L.P. ("ASOF Frontier AIV A9"), ASOF Frontier AIV A10, L.P. ("ASOF Frontier AIV A10"), ASOF Frontier AIV A11, L.P. ("ASOF Frontier AIV A11"), ASOF Frontier AIV B1, L.P. ("ASOF Frontier AIV B1"), (continued in next footnote)

F3 · balance_after: ASOF II Frontier Holdings 1 L.P. ("ASOF II Frontier Holdings 1"), ASOF II Frontier Holdings 2 L.P. ("ASOF II Frontier Holdings 2"), ASOF II Frontier Holdings 3 L.P. ("ASOF II Frontier Holdings 3"), ASOF II Frontier Holdings 4 L.P. ("ASOF II Frontier Holdings 4"), ASOF II Frontier Holdings 5 L.P. ("ASOF II Frontier Holdings 5"), ASOF II Frontier Holdings 6 L.P. ("ASOF II Frontier Holdings 6"), (continued in next footnote)

F4 · balance_after: ASOF II Frontier Holdings 7 L.P. ("ASOF II Frontier Holdings 7"), ASOF II A (DE) Frontier Holdings 1 L.P. ("ASOF II A (DE) Frontier Holdings 1") and ASOF II A (DE) Frontier Holdings 2 L.P. ("ASOF II A (DE) Frontier Holdings 2", and together with ASOF Frontier AIV A1, ASOF Frontier AIV A2, ASOF Frontier AIV A3, ASOF Frontier AIV A4, ASOF Frontier AIV A5, ASOF Frontier AIV A6, ASOF Frontier AIV A7, ASOF Frontier AIV A8, ASOF Frontier AIV A9, ASOF Frontier AIV A10, and ASOF Frontier AIV A11, ASOF II Frontier Holdings 1, ASOF II Frontier Holdings 2, ASOF II Frontier Holdings 3, ASOF II Frontier Holdings 4, ASOF II Frontier Holdings 5, ASOF II Frontier Holdings 6, ASOF II Frontier Holdings 7 and ASOF II A (DE) Frontier Holdings 1, the "ASOF Funds"), (continued in next footnote)

F5 · balance_after: ASSF IV AIV B Holdings III, L.P. ("ASSF IV AIV B Holdings III"), ASSF IV AIV B, L.P. ("ASSF IV AIV B", and together with ASSF IV AIV B Holdings III, the "ASSF Funds"), ACOF Investment Management LLC ("ACOF Investment Management"), ASOF Investment Management LLC ("ASOF Investment Management"), ASSF Operating Manager IV, L.P. ("ASSF Operating Manager IV"), (continued in next footnote)

F6 · balance_after: Ares Management LLC, Ares Management Holdings L.P. ("Ares Management Holdings"), Ares Holdco LLC ("Ares Holdco"), Ares Management Corporation ("Ares Management"), Ares Management GP LLC ("Ares Management GP"), Ares Voting LLC ("Ares Voting") and Ares Partners Holdco LLC ("Ares Partners", and together with the ACOF Funds, the ASOF Funds, the ASSF Funds, ACOF Investment Management, ASOF Investment Management, ASSF Operating Manager IV, Ares Management LLC, Ares Management Holdings, Ares Holdco, Ares Management, Ares Management GP, and Ares Voting, the "Reporting Persons"). Due to the electronic system's limitation of 10 Reporting Persons per joint filing, this statement is being filed in five parts.

F7 · balance_after: The Reporting Persons collectively beneficially own, or may be deemed to beneficially own, in the aggregate 38,762,895 shares of Common Stock by reason of the direct or indirect beneficial ownership of such shares as follows: (i) ACOF VI Frontier AIV A1 owns 258,196 shares of Common Stock; (ii) ACOF VI Frontier AIV A2 owns 92,590 shares of Common Stock; (iii) ACOF VI Frontier AIV A3 owns 21,604 shares of Common Stock; (iv) ACOF VI Frontier AIV A4 owns 280,859 shares of Common Stock; (v) ACOF VI Frontier AIV A5 owns 308,635 shares of Common Stock; (vi) ACOF VI Frontier AIV A6 owns 172,837 shares of Common Stock; (vii) ACOF VI Frontier AIV A7 owns 312,782 shares of Common Stock; (viii) ACOF VI Frontier AIV A8 owns 314,191 shares of Common Stock; (ix) ACOF VI Frontier AIV A9 owns 295,057 shares of Common Stock; (x) ACOF VI Frontier AIV A10 owns 93,301 shares of Common Stock; (xi) ACOF VI Frontier AIV B1 owns 15,574,332 shares of Common Stock; (continued in next footnote)

F8 · balance_after: (xii) ASOF Frontier AIV A1 owns 105,592 shares of Common Stock; (xiii) ASOF Frontier AIV A2 owns 18,032 shares of Common Stock; (xiv) ASOF Frontier AIV A3 owns 830,837 shares of Common Stock; (xv) ASOF Frontier AIV A4 owns 281,844 shares of Common Stock; (xvi) ASOF Frontier AIV A5 owns 167,160 shares of Common Stock; (xvii) ASOF Frontier AIV A6 owns 292,124 shares of Common Stock; (xviii) ASOF Frontier AIV A7 owns 289,417 shares of Common Stock; (xix) ASOF Frontier AIV A8 owns 238,026 shares of Common Stock; (xx) ASOF Frontier AIV A9 owns 360,644 shares of Common Stock; (xxi) ASOF Frontier AIV A10 owns 259,665 shares of Common Stock; (xxii) ASOF Frontier AIV A11 owns 245,236 shares of Common Stock; (xxiii) ASOF Frontier AIV B1 owns 9,597,579 shares of Common Stock; (continued in next footnote)

F9 · balance_after: (xxiv) ASOF II Frontier Holdings 1 owns 1,907,462 shares of Common Stock, (xxv) ASOF II Frontier Holdings 2 owns 91,937 shares of Common Stock, (xxvi) ASOF II Frontier Holdings 3 owns 102,400 shares of Common Stock, (xxvii) ASOF II Frontier Holdings 4 owns 99,247 shares of Common Stock, (xxviii) ASOF II Frontier Holdings 5 owns 98,293 shares of Common Stock, (xxix) ASOF II Frontier Holdings 6 owns 104,167 shares of Common Stock, (xxx) ASOF II Frontier Holdings 7 owns 104,424 shares of Common Stock, (xxxi) ASOF II A (DE) Frontier Holdings 1 owns 456,934 shares of Common Stock; (xxxii) ASOF II A (DE) Frontier Holdings 2 owns 16,815 shares of Common Stock; (xxxiii) ASSF IV AIV B Holdings III owns 2,694,243 shares of Common Stock and (xxxiv) ASSF IV AIV B directly or indirectly owns 5,348,289 shares of Common Stock.

F10 · balance_after: Ares Partners is the sole member of each of Ares Voting and Ares Management GP, which are respectively the holders of the Class B and Class C common stock of Ares Management, which common stock allows them, collectively, to generally have the majority of the votes on any matter submitted to the stockholders of Ares Management if certain conditions are met. Ares Management is the sole member of Ares Holdco, which is the general partner of Ares Management Holdings, which is the sole member of Ares Management LLC, which is: (a) the sole member of ACOF Investment Management, which is the manager of the ACOF Funds, (b) the sole member of ASOF Investment Management, which is the manager of the ASOF Funds, and (c) the general partner of ASSF Operating Manager IV, which is the manager of the ASSF Funds.

F11 · balance_after: Ares Partners is managed by a board of managers, which is composed of Michael J Arougheti, Ryan Berry, R. Kipp deVeer, David B. Kaplan, Antony P. Ressler and Bennett Rosenthal (collectively, the "Board Members"). Mr. Ressler generally has veto authority over Board Members' decisions.

F12 · balance_after: Each of the Reporting Persons, and the Board Members, and the other directors, officers, partners, stockholders, members and managers of the Reporting Persons, expressly disclaims beneficial ownership of the Common Stock, except to the extent of any pecuniary interest therein, and this Form 4 shall not be deemed an admission that any such person or entity is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purposes.

F1 · ownership.nature: This statement is being filed by ACOF VI Frontier AIV A1, L.P. ("ACOF VI Frontier AIV A1"), ACOF VI Frontier AIV A2, L.P. ("ACOF VI Frontier AIV A2"), ACOF VI Frontier AIV A3, L.P. ("ACOF VI Frontier AIV A3"), ACOF VI Frontier AIV A4, L.P. ("ACOF VI Frontier AIV A4"), ACOF VI Frontier AIV A5, L.P. ("ACOF VI Frontier AIV A5"), ACOF VI Frontier AIV A6, L.P. ("ACOF VI Frontier AIV A6"), ACOF VI Frontier AIV A7, L.P. ("ACOF VI Frontier AIV A7"), ACOF VI Frontier AIV A8, L.P. ("ACOF VI Frontier AIV A8"), ACOF VI Frontier AIV A9, L.P. ("ACOF VI Frontier AIV A9"), ACOF VI Frontier AIV A10, L.P. ("ACOF VI Frontier AIV A10"), and ACOF VI Frontier AIV B1, L.P. ("ACOF VI Frontier AIV B1", together with the foregoing entities, the "ACOF Funds"), (continued in next footnote)

F2 · ownership.nature: ASOF Frontier AIV A1, L.P. ("ASOF Frontier AIV A1"), ASOF Frontier AIV A2, L.P. ("ASOF Frontier AIV A2"), ASOF Frontier AIV A3, L.P. ("ASOF Frontier AIV A3"), ASOF Frontier AIV A4, L.P. ("ASOF Frontier AIV A4"), ASOF Frontier AIV A5, L.P. ("ASOF Frontier AIV A5"), ASOF Frontier AIV A6, L.P. ("ASOF Frontier AIV A6"), ASOF Frontier AIV A7, L.P. ("ASOF Frontier AIV A7"), ASOF Frontier AIV A8, L.P. ("ASOF Frontier AIV A8"), ASOF Frontier AIV A9, L.P. ("ASOF Frontier AIV A9"), ASOF Frontier AIV A10, L.P. ("ASOF Frontier AIV A10"), ASOF Frontier AIV A11, L.P. ("ASOF Frontier AIV A11"), ASOF Frontier AIV B1, L.P. ("ASOF Frontier AIV B1"), (continued in next footnote)

F3 · ownership.nature: ASOF II Frontier Holdings 1 L.P. ("ASOF II Frontier Holdings 1"), ASOF II Frontier Holdings 2 L.P. ("ASOF II Frontier Holdings 2"), ASOF II Frontier Holdings 3 L.P. ("ASOF II Frontier Holdings 3"), ASOF II Frontier Holdings 4 L.P. ("ASOF II Frontier Holdings 4"), ASOF II Frontier Holdings 5 L.P. ("ASOF II Frontier Holdings 5"), ASOF II Frontier Holdings 6 L.P. ("ASOF II Frontier Holdings 6"), (continued in next footnote)

F4 · ownership.nature: ASOF II Frontier Holdings 7 L.P. ("ASOF II Frontier Holdings 7"), ASOF II A (DE) Frontier Holdings 1 L.P. ("ASOF II A (DE) Frontier Holdings 1") and ASOF II A (DE) Frontier Holdings 2 L.P. ("ASOF II A (DE) Frontier Holdings 2", and together with ASOF Frontier AIV A1, ASOF Frontier AIV A2, ASOF Frontier AIV A3, ASOF Frontier AIV A4, ASOF Frontier AIV A5, ASOF Frontier AIV A6, ASOF Frontier AIV A7, ASOF Frontier AIV A8, ASOF Frontier AIV A9, ASOF Frontier AIV A10, and ASOF Frontier AIV A11, ASOF II Frontier Holdings 1, ASOF II Frontier Holdings 2, ASOF II Frontier Holdings 3, ASOF II Frontier Holdings 4, ASOF II Frontier Holdings 5, ASOF II Frontier Holdings 6, ASOF II Frontier Holdings 7 and ASOF II A (DE) Frontier Holdings 1, the "ASOF Funds"), (continued in next footnote)

F5 · ownership.nature: ASSF IV AIV B Holdings III, L.P. ("ASSF IV AIV B Holdings III"), ASSF IV AIV B, L.P. ("ASSF IV AIV B", and together with ASSF IV AIV B Holdings III, the "ASSF Funds"), ACOF Investment Management LLC ("ACOF Investment Management"), ASOF Investment Management LLC ("ASOF Investment Management"), ASSF Operating Manager IV, L.P. ("ASSF Operating Manager IV"), (continued in next footnote)

F6 · ownership.nature: Ares Management LLC, Ares Management Holdings L.P. ("Ares Management Holdings"), Ares Holdco LLC ("Ares Holdco"), Ares Management Corporation ("Ares Management"), Ares Management GP LLC ("Ares Management GP"), Ares Voting LLC ("Ares Voting") and Ares Partners Holdco LLC ("Ares Partners", and together with the ACOF Funds, the ASOF Funds, the ASSF Funds, ACOF Investment Management, ASOF Investment Management, ASSF Operating Manager IV, Ares Management LLC, Ares Management Holdings, Ares Holdco, Ares Management, Ares Management GP, and Ares Voting, the "Reporting Persons"). Due to the electronic system's limitation of 10 Reporting Persons per joint filing, this statement is being filed in five parts.

F7 · ownership.nature: The Reporting Persons collectively beneficially own, or may be deemed to beneficially own, in the aggregate 38,762,895 shares of Common Stock by reason of the direct or indirect beneficial ownership of such shares as follows: (i) ACOF VI Frontier AIV A1 owns 258,196 shares of Common Stock; (ii) ACOF VI Frontier AIV A2 owns 92,590 shares of Common Stock; (iii) ACOF VI Frontier AIV A3 owns 21,604 shares of Common Stock; (iv) ACOF VI Frontier AIV A4 owns 280,859 shares of Common Stock; (v) ACOF VI Frontier AIV A5 owns 308,635 shares of Common Stock; (vi) ACOF VI Frontier AIV A6 owns 172,837 shares of Common Stock; (vii) ACOF VI Frontier AIV A7 owns 312,782 shares of Common Stock; (viii) ACOF VI Frontier AIV A8 owns 314,191 shares of Common Stock; (ix) ACOF VI Frontier AIV A9 owns 295,057 shares of Common Stock; (x) ACOF VI Frontier AIV A10 owns 93,301 shares of Common Stock; (xi) ACOF VI Frontier AIV B1 owns 15,574,332 shares of Common Stock; (continued in next footnote)

F8 · ownership.nature: (xii) ASOF Frontier AIV A1 owns 105,592 shares of Common Stock; (xiii) ASOF Frontier AIV A2 owns 18,032 shares of Common Stock; (xiv) ASOF Frontier AIV A3 owns 830,837 shares of Common Stock; (xv) ASOF Frontier AIV A4 owns 281,844 shares of Common Stock; (xvi) ASOF Frontier AIV A5 owns 167,160 shares of Common Stock; (xvii) ASOF Frontier AIV A6 owns 292,124 shares of Common Stock; (xviii) ASOF Frontier AIV A7 owns 289,417 shares of Common Stock; (xix) ASOF Frontier AIV A8 owns 238,026 shares of Common Stock; (xx) ASOF Frontier AIV A9 owns 360,644 shares of Common Stock; (xxi) ASOF Frontier AIV A10 owns 259,665 shares of Common Stock; (xxii) ASOF Frontier AIV A11 owns 245,236 shares of Common Stock; (xxiii) ASOF Frontier AIV B1 owns 9,597,579 shares of Common Stock; (continued in next footnote)

F9 · ownership.nature: (xxiv) ASOF II Frontier Holdings 1 owns 1,907,462 shares of Common Stock, (xxv) ASOF II Frontier Holdings 2 owns 91,937 shares of Common Stock, (xxvi) ASOF II Frontier Holdings 3 owns 102,400 shares of Common Stock, (xxvii) ASOF II Frontier Holdings 4 owns 99,247 shares of Common Stock, (xxviii) ASOF II Frontier Holdings 5 owns 98,293 shares of Common Stock, (xxix) ASOF II Frontier Holdings 6 owns 104,167 shares of Common Stock, (xxx) ASOF II Frontier Holdings 7 owns 104,424 shares of Common Stock, (xxxi) ASOF II A (DE) Frontier Holdings 1 owns 456,934 shares of Common Stock; (xxxii) ASOF II A (DE) Frontier Holdings 2 owns 16,815 shares of Common Stock; (xxxiii) ASSF IV AIV B Holdings III owns 2,694,243 shares of Common Stock and (xxxiv) ASSF IV AIV B directly or indirectly owns 5,348,289 shares of Common Stock.

F10 · ownership.nature: Ares Partners is the sole member of each of Ares Voting and Ares Management GP, which are respectively the holders of the Class B and Class C common stock of Ares Management, which common stock allows them, collectively, to generally have the majority of the votes on any matter submitted to the stockholders of Ares Management if certain conditions are met. Ares Management is the sole member of Ares Holdco, which is the general partner of Ares Management Holdings, which is the sole member of Ares Management LLC, which is: (a) the sole member of ACOF Investment Management, which is the manager of the ACOF Funds, (b) the sole member of ASOF Investment Management, which is the manager of the ASOF Funds, and (c) the general partner of ASSF Operating Manager IV, which is the manager of the ASSF Funds.

F11 · ownership.nature: Ares Partners is managed by a board of managers, which is composed of Michael J Arougheti, Ryan Berry, R. Kipp deVeer, David B. Kaplan, Antony P. Ressler and Bennett Rosenthal (collectively, the "Board Members"). Mr. Ressler generally has veto authority over Board Members' decisions.

F12 · ownership.nature: Each of the Reporting Persons, and the Board Members, and the other directors, officers, partners, stockholders, members and managers of the Reporting Persons, expressly disclaims beneficial ownership of the Common Stock, except to the extent of any pecuniary interest therein, and this Form 4 shall not be deemed an admission that any such person or entity is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purposes.

SEC source: 0001104659-23-101943 · tm2326372-2_4seq1.xml · nonDerivative · entry 1

ARES MANAGEMENT LLC · CIK 0001259313 · 10% owner

ACOF VI Frontier AIV A1, L.P. · CIK 0001862494 · 10% owner

ACOF VI Frontier AIV A2, L.P. · CIK 0001862499 · 10% owner

ACOF VI Frontier AIV A3, L.P. · CIK 0001862534 · 10% owner

ACOF VI Frontier AIV A4, L.P. · CIK 0001862529 · 10% owner

ACOF VI Frontier AIV A5, L.P. · CIK 0001862526 · 10% owner

ACOF VI Frontier AIV A6, L.P. · CIK 0001862483 · 10% owner

ACOF VI Frontier AIV A7, L.P. · CIK 0001862482 · 10% owner

ACOF VI Frontier AIV A8, L.P. · CIK 0001862505 · 10% owner

ACOF VI Frontier AIV A9, L.P. · CIK 0001862533 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnotes

Disclosed balance after: 38,612,895

F1 · balance_after: This statement is being filed by ACOF VI Frontier AIV A1, L.P. ("ACOF VI Frontier AIV A1"), ACOF VI Frontier AIV A2, L.P. ("ACOF VI Frontier AIV A2"), ACOF VI Frontier AIV A3, L.P. ("ACOF VI Frontier AIV A3"), ACOF VI Frontier AIV A4, L.P. ("ACOF VI Frontier AIV A4"), ACOF VI Frontier AIV A5, L.P. ("ACOF VI Frontier AIV A5"), ACOF VI Frontier AIV A6, L.P. ("ACOF VI Frontier AIV A6"), ACOF VI Frontier AIV A7, L.P. ("ACOF VI Frontier AIV A7"), ACOF VI Frontier AIV A8, L.P. ("ACOF VI Frontier AIV A8"), ACOF VI Frontier AIV A9, L.P. ("ACOF VI Frontier AIV A9"), ACOF VI Frontier AIV A10, L.P. ("ACOF VI Frontier AIV A10"), and ACOF VI Frontier AIV B1, L.P. ("ACOF VI Frontier AIV B1", together with the foregoing entities, the "ACOF Funds"), (continued in next footnote)

F2 · balance_after: ASOF Frontier AIV A1, L.P. ("ASOF Frontier AIV A1"), ASOF Frontier AIV A2, L.P. ("ASOF Frontier AIV A2"), ASOF Frontier AIV A3, L.P. ("ASOF Frontier AIV A3"), ASOF Frontier AIV A4, L.P. ("ASOF Frontier AIV A4"), ASOF Frontier AIV A5, L.P. ("ASOF Frontier AIV A5"), ASOF Frontier AIV A6, L.P. ("ASOF Frontier AIV A6"), ASOF Frontier AIV A7, L.P. ("ASOF Frontier AIV A7"), ASOF Frontier AIV A8, L.P. ("ASOF Frontier AIV A8"), ASOF Frontier AIV A9, L.P. ("ASOF Frontier AIV A9"), ASOF Frontier AIV A10, L.P. ("ASOF Frontier AIV A10"), ASOF Frontier AIV A11, L.P. ("ASOF Frontier AIV A11"), ASOF Frontier AIV B1, L.P. ("ASOF Frontier AIV B1"), (continued in next footnote)

F3 · balance_after: ASOF II Frontier Holdings 1 L.P. ("ASOF II Frontier Holdings 1"), ASOF II Frontier Holdings 2 L.P. ("ASOF II Frontier Holdings 2"), ASOF II Frontier Holdings 3 L.P. ("ASOF II Frontier Holdings 3"), ASOF II Frontier Holdings 4 L.P. ("ASOF II Frontier Holdings 4"), ASOF II Frontier Holdings 5 L.P. ("ASOF II Frontier Holdings 5"), ASOF II Frontier Holdings 6 L.P. ("ASOF II Frontier Holdings 6"), (continued in next footnote)

F4 · balance_after: ASOF II Frontier Holdings 7 L.P. ("ASOF II Frontier Holdings 7"), ASOF II A (DE) Frontier Holdings 1 L.P. ("ASOF II A (DE) Frontier Holdings 1") and ASOF II A (DE) Frontier Holdings 2 L.P. ("ASOF II A (DE) Frontier Holdings 2", and together with ASOF Frontier AIV A1, ASOF Frontier AIV A2, ASOF Frontier AIV A3, ASOF Frontier AIV A4, ASOF Frontier AIV A5, ASOF Frontier AIV A6, ASOF Frontier AIV A7, ASOF Frontier AIV A8, ASOF Frontier AIV A9, ASOF Frontier AIV A10, and ASOF Frontier AIV A11, ASOF II Frontier Holdings 1, ASOF II Frontier Holdings 2, ASOF II Frontier Holdings 3, ASOF II Frontier Holdings 4, ASOF II Frontier Holdings 5, ASOF II Frontier Holdings 6, ASOF II Frontier Holdings 7 and ASOF II A (DE) Frontier Holdings 1, the "ASOF Funds"), (continued in next footnote)

F5 · balance_after: ASSF IV AIV B Holdings III, L.P. ("ASSF IV AIV B Holdings III"), ASSF IV AIV B, L.P. ("ASSF IV AIV B", and together with ASSF IV AIV B Holdings III, the "ASSF Funds"), ACOF Investment Management LLC ("ACOF Investment Management"), ASOF Investment Management LLC ("ASOF Investment Management"), ASSF Operating Manager IV, L.P. ("ASSF Operating Manager IV"), (continued in next footnote)

F6 · balance_after: Ares Management LLC, Ares Management Holdings L.P. ("Ares Management Holdings"), Ares Holdco LLC ("Ares Holdco"), Ares Management Corporation ("Ares Management"), Ares Management GP LLC ("Ares Management GP"), Ares Voting LLC ("Ares Voting") and Ares Partners Holdco LLC ("Ares Partners", and together with the ACOF Funds, the ASOF Funds, the ASSF Funds, ACOF Investment Management, ASOF Investment Management, ASSF Operating Manager IV, Ares Management LLC, Ares Management Holdings, Ares Holdco, Ares Management, Ares Management GP, and Ares Voting, the "Reporting Persons"). Due to the electronic system's limitation of 10 Reporting Persons per joint filing, this statement is being filed in five parts.

F7 · balance_after: The Reporting Persons collectively beneficially own, or may be deemed to beneficially own, in the aggregate 38,612,895 shares of Common Stock by reason of the direct or indirect beneficial ownership of such shares as follows: (i) ACOF VI Frontier AIV A1 owns 258,196 shares of Common Stock; (ii) ACOF VI Frontier AIV A2 owns 92,590 shares of Common Stock; (iii) ACOF VI Frontier AIV A3 owns 21,604 shares of Common Stock; (iv) ACOF VI Frontier AIV A4 owns 280,859 shares of Common Stock; (v) ACOF VI Frontier AIV A5 owns 308,635 shares of Common Stock; (vi) ACOF VI Frontier AIV A6 owns 172,837 shares of Common Stock; (vii) ACOF VI Frontier AIV A7 owns 312,782 shares of Common Stock; (viii) ACOF VI Frontier AIV A8 owns 314,191 shares of Common Stock; (ix) ACOF VI Frontier AIV A9 owns 295,057 shares of Common Stock; (x) ACOF VI Frontier AIV A10 owns 93,301 shares of Common Stock; (xi) ACOF VI Frontier AIV B1 owns 15,574,332 shares of Common Stock; (continued in next footnote)

F8 · balance_after: (xii) ASOF Frontier AIV A1 owns 105,592 shares of Common Stock; (xiii) ASOF Frontier AIV A2 owns 18,032 shares of Common Stock; (xiv) ASOF Frontier AIV A3 owns 830,837 shares of Common Stock; (xv) ASOF Frontier AIV A4 owns 281,844 shares of Common Stock; (xvi) ASOF Frontier AIV A5 owns 167,160 shares of Common Stock; (xvii) ASOF Frontier AIV A6 owns 292,124 shares of Common Stock; (xviii) ASOF Frontier AIV A7 owns 289,417 shares of Common Stock; (xix) ASOF Frontier AIV A8 owns 238,026 shares of Common Stock; (xx) ASOF Frontier AIV A9 owns 360,644 shares of Common Stock; (xxi) ASOF Frontier AIV A10 owns 259,665 shares of Common Stock; (xxii) ASOF Frontier AIV A11 owns 245,236 shares of Common Stock; (xxiii) ASOF Frontier AIV B1 owns 9,597,579 shares of Common Stock; (continued in next footnote)

F9 · balance_after: (xxiv) ASOF II Frontier Holdings 1 owns 1,811,502 shares of Common Stock, (xxv) ASOF II Frontier Holdings 2 owns 87,312 shares of Common Stock, (xxvi) ASOF II Frontier Holdings 3 owns 97,249 shares of Common Stock, (xxvii) ASOF II Frontier Holdings 4 owns 94,254 shares of Common Stock, (xxviii) ASOF II Frontier Holdings 5 owns 93,348 shares of Common Stock, (xxix) ASOF II Frontier Holdings 6 owns 98,926 shares of Common Stock, (xxx) ASOF II Frontier Holdings 7 owns 99,171 shares of Common Stock, (xxxi) ASOF II A (DE) Frontier Holdings 1 owns 433,948 shares of Common Stock; (xxxii) ASOF II A (DE) Frontier Holdings 2 owns 15,969 shares of Common Stock; (xxxiii) ASSF IV AIV B Holdings III owns 2,694,243 shares of Common Stock and (xxxiv) ASSF IV AIV B directly or indirectly owns 5,348,289 shares of Common Stock.

F10 · balance_after: Ares Partners is the sole member of each of Ares Voting and Ares Management GP, which are respectively the holders of the Class B and Class C common stock of Ares Management, which common stock allows them, collectively, to generally have the majority of the votes on any matter submitted to the stockholders of Ares Management if certain conditions are met. Ares Management is the sole member of Ares Holdco, which is the general partner of Ares Management Holdings, which is the sole member of Ares Management LLC, which is: (a) the sole member of ACOF Investment Management, which is the manager of the ACOF Funds, (b) the sole member of ASOF Investment Management, which is the manager of the ASOF Funds, and (c) the general partner of ASSF Operating Manager IV, which is the manager of the ASSF Funds.

F11 · balance_after: Ares Partners is managed by a board of managers, which is composed of Michael J Arougheti, Ryan Berry, R. Kipp deVeer, David B. Kaplan, Antony P. Ressler and Bennett Rosenthal (collectively, the "Board Members"). Mr. Ressler generally has veto authority over Board Members' decisions.

F12 · balance_after: Each of the Reporting Persons, and the Board Members, and the other directors, officers, partners, stockholders, members and managers of the Reporting Persons, expressly disclaims beneficial ownership of the Common Stock, except to the extent of any pecuniary interest therein, and this Form 4 shall not be deemed an admission that any such person or entity is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purposes.

F1 · ownership.nature: This statement is being filed by ACOF VI Frontier AIV A1, L.P. ("ACOF VI Frontier AIV A1"), ACOF VI Frontier AIV A2, L.P. ("ACOF VI Frontier AIV A2"), ACOF VI Frontier AIV A3, L.P. ("ACOF VI Frontier AIV A3"), ACOF VI Frontier AIV A4, L.P. ("ACOF VI Frontier AIV A4"), ACOF VI Frontier AIV A5, L.P. ("ACOF VI Frontier AIV A5"), ACOF VI Frontier AIV A6, L.P. ("ACOF VI Frontier AIV A6"), ACOF VI Frontier AIV A7, L.P. ("ACOF VI Frontier AIV A7"), ACOF VI Frontier AIV A8, L.P. ("ACOF VI Frontier AIV A8"), ACOF VI Frontier AIV A9, L.P. ("ACOF VI Frontier AIV A9"), ACOF VI Frontier AIV A10, L.P. ("ACOF VI Frontier AIV A10"), and ACOF VI Frontier AIV B1, L.P. ("ACOF VI Frontier AIV B1", together with the foregoing entities, the "ACOF Funds"), (continued in next footnote)

F2 · ownership.nature: ASOF Frontier AIV A1, L.P. ("ASOF Frontier AIV A1"), ASOF Frontier AIV A2, L.P. ("ASOF Frontier AIV A2"), ASOF Frontier AIV A3, L.P. ("ASOF Frontier AIV A3"), ASOF Frontier AIV A4, L.P. ("ASOF Frontier AIV A4"), ASOF Frontier AIV A5, L.P. ("ASOF Frontier AIV A5"), ASOF Frontier AIV A6, L.P. ("ASOF Frontier AIV A6"), ASOF Frontier AIV A7, L.P. ("ASOF Frontier AIV A7"), ASOF Frontier AIV A8, L.P. ("ASOF Frontier AIV A8"), ASOF Frontier AIV A9, L.P. ("ASOF Frontier AIV A9"), ASOF Frontier AIV A10, L.P. ("ASOF Frontier AIV A10"), ASOF Frontier AIV A11, L.P. ("ASOF Frontier AIV A11"), ASOF Frontier AIV B1, L.P. ("ASOF Frontier AIV B1"), (continued in next footnote)

F3 · ownership.nature: ASOF II Frontier Holdings 1 L.P. ("ASOF II Frontier Holdings 1"), ASOF II Frontier Holdings 2 L.P. ("ASOF II Frontier Holdings 2"), ASOF II Frontier Holdings 3 L.P. ("ASOF II Frontier Holdings 3"), ASOF II Frontier Holdings 4 L.P. ("ASOF II Frontier Holdings 4"), ASOF II Frontier Holdings 5 L.P. ("ASOF II Frontier Holdings 5"), ASOF II Frontier Holdings 6 L.P. ("ASOF II Frontier Holdings 6"), (continued in next footnote)

F4 · ownership.nature: ASOF II Frontier Holdings 7 L.P. ("ASOF II Frontier Holdings 7"), ASOF II A (DE) Frontier Holdings 1 L.P. ("ASOF II A (DE) Frontier Holdings 1") and ASOF II A (DE) Frontier Holdings 2 L.P. ("ASOF II A (DE) Frontier Holdings 2", and together with ASOF Frontier AIV A1, ASOF Frontier AIV A2, ASOF Frontier AIV A3, ASOF Frontier AIV A4, ASOF Frontier AIV A5, ASOF Frontier AIV A6, ASOF Frontier AIV A7, ASOF Frontier AIV A8, ASOF Frontier AIV A9, ASOF Frontier AIV A10, and ASOF Frontier AIV A11, ASOF II Frontier Holdings 1, ASOF II Frontier Holdings 2, ASOF II Frontier Holdings 3, ASOF II Frontier Holdings 4, ASOF II Frontier Holdings 5, ASOF II Frontier Holdings 6, ASOF II Frontier Holdings 7 and ASOF II A (DE) Frontier Holdings 1, the "ASOF Funds"), (continued in next footnote)

F5 · ownership.nature: ASSF IV AIV B Holdings III, L.P. ("ASSF IV AIV B Holdings III"), ASSF IV AIV B, L.P. ("ASSF IV AIV B", and together with ASSF IV AIV B Holdings III, the "ASSF Funds"), ACOF Investment Management LLC ("ACOF Investment Management"), ASOF Investment Management LLC ("ASOF Investment Management"), ASSF Operating Manager IV, L.P. ("ASSF Operating Manager IV"), (continued in next footnote)

F6 · ownership.nature: Ares Management LLC, Ares Management Holdings L.P. ("Ares Management Holdings"), Ares Holdco LLC ("Ares Holdco"), Ares Management Corporation ("Ares Management"), Ares Management GP LLC ("Ares Management GP"), Ares Voting LLC ("Ares Voting") and Ares Partners Holdco LLC ("Ares Partners", and together with the ACOF Funds, the ASOF Funds, the ASSF Funds, ACOF Investment Management, ASOF Investment Management, ASSF Operating Manager IV, Ares Management LLC, Ares Management Holdings, Ares Holdco, Ares Management, Ares Management GP, and Ares Voting, the "Reporting Persons"). Due to the electronic system's limitation of 10 Reporting Persons per joint filing, this statement is being filed in five parts.

F7 · ownership.nature: The Reporting Persons collectively beneficially own, or may be deemed to beneficially own, in the aggregate 38,612,895 shares of Common Stock by reason of the direct or indirect beneficial ownership of such shares as follows: (i) ACOF VI Frontier AIV A1 owns 258,196 shares of Common Stock; (ii) ACOF VI Frontier AIV A2 owns 92,590 shares of Common Stock; (iii) ACOF VI Frontier AIV A3 owns 21,604 shares of Common Stock; (iv) ACOF VI Frontier AIV A4 owns 280,859 shares of Common Stock; (v) ACOF VI Frontier AIV A5 owns 308,635 shares of Common Stock; (vi) ACOF VI Frontier AIV A6 owns 172,837 shares of Common Stock; (vii) ACOF VI Frontier AIV A7 owns 312,782 shares of Common Stock; (viii) ACOF VI Frontier AIV A8 owns 314,191 shares of Common Stock; (ix) ACOF VI Frontier AIV A9 owns 295,057 shares of Common Stock; (x) ACOF VI Frontier AIV A10 owns 93,301 shares of Common Stock; (xi) ACOF VI Frontier AIV B1 owns 15,574,332 shares of Common Stock; (continued in next footnote)

F8 · ownership.nature: (xii) ASOF Frontier AIV A1 owns 105,592 shares of Common Stock; (xiii) ASOF Frontier AIV A2 owns 18,032 shares of Common Stock; (xiv) ASOF Frontier AIV A3 owns 830,837 shares of Common Stock; (xv) ASOF Frontier AIV A4 owns 281,844 shares of Common Stock; (xvi) ASOF Frontier AIV A5 owns 167,160 shares of Common Stock; (xvii) ASOF Frontier AIV A6 owns 292,124 shares of Common Stock; (xviii) ASOF Frontier AIV A7 owns 289,417 shares of Common Stock; (xix) ASOF Frontier AIV A8 owns 238,026 shares of Common Stock; (xx) ASOF Frontier AIV A9 owns 360,644 shares of Common Stock; (xxi) ASOF Frontier AIV A10 owns 259,665 shares of Common Stock; (xxii) ASOF Frontier AIV A11 owns 245,236 shares of Common Stock; (xxiii) ASOF Frontier AIV B1 owns 9,597,579 shares of Common Stock; (continued in next footnote)

F9 · ownership.nature: (xxiv) ASOF II Frontier Holdings 1 owns 1,811,502 shares of Common Stock, (xxv) ASOF II Frontier Holdings 2 owns 87,312 shares of Common Stock, (xxvi) ASOF II Frontier Holdings 3 owns 97,249 shares of Common Stock, (xxvii) ASOF II Frontier Holdings 4 owns 94,254 shares of Common Stock, (xxviii) ASOF II Frontier Holdings 5 owns 93,348 shares of Common Stock, (xxix) ASOF II Frontier Holdings 6 owns 98,926 shares of Common Stock, (xxx) ASOF II Frontier Holdings 7 owns 99,171 shares of Common Stock, (xxxi) ASOF II A (DE) Frontier Holdings 1 owns 433,948 shares of Common Stock; (xxxii) ASOF II A (DE) Frontier Holdings 2 owns 15,969 shares of Common Stock; (xxxiii) ASSF IV AIV B Holdings III owns 2,694,243 shares of Common Stock and (xxxiv) ASSF IV AIV B directly or indirectly owns 5,348,289 shares of Common Stock.

F10 · ownership.nature: Ares Partners is the sole member of each of Ares Voting and Ares Management GP, which are respectively the holders of the Class B and Class C common stock of Ares Management, which common stock allows them, collectively, to generally have the majority of the votes on any matter submitted to the stockholders of Ares Management if certain conditions are met. Ares Management is the sole member of Ares Holdco, which is the general partner of Ares Management Holdings, which is the sole member of Ares Management LLC, which is: (a) the sole member of ACOF Investment Management, which is the manager of the ACOF Funds, (b) the sole member of ASOF Investment Management, which is the manager of the ASOF Funds, and (c) the general partner of ASSF Operating Manager IV, which is the manager of the ASSF Funds.

F11 · ownership.nature: Ares Partners is managed by a board of managers, which is composed of Michael J Arougheti, Ryan Berry, R. Kipp deVeer, David B. Kaplan, Antony P. Ressler and Bennett Rosenthal (collectively, the "Board Members"). Mr. Ressler generally has veto authority over Board Members' decisions.

F12 · ownership.nature: Each of the Reporting Persons, and the Board Members, and the other directors, officers, partners, stockholders, members and managers of the Reporting Persons, expressly disclaims beneficial ownership of the Common Stock, except to the extent of any pecuniary interest therein, and this Form 4 shall not be deemed an admission that any such person or entity is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purposes.

SEC source: 0001104659-23-100439 · tm2326031d1_4seq1.xml · nonDerivative · entry 1

ARES MANAGEMENT LLC · CIK 0001259313 · 10% owner

ACOF VI Frontier AIV A1, L.P. · CIK 0001862494 · 10% owner

ACOF VI Frontier AIV A2, L.P. · CIK 0001862499 · 10% owner

ACOF VI Frontier AIV A3, L.P. · CIK 0001862534 · 10% owner

ACOF VI Frontier AIV A4, L.P. · CIK 0001862529 · 10% owner

ACOF VI Frontier AIV A5, L.P. · CIK 0001862526 · 10% owner

ACOF VI Frontier AIV A6, L.P. · CIK 0001862483 · 10% owner

ACOF VI Frontier AIV A7, L.P. · CIK 0001862482 · 10% owner

ACOF VI Frontier AIV A8, L.P. · CIK 0001862505 · 10% owner

ACOF VI Frontier AIV A9, L.P. · CIK 0001862533 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnotes

Disclosed balance after: 38,512,895

F1 · balance_after: This statement is being filed by ACOF VI Frontier AIV A1, L.P. ("ACOF VI Frontier AIV A1"), ACOF VI Frontier AIV A2, L.P. ("ACOF VI Frontier AIV A2"), ACOF VI Frontier AIV A3, L.P. ("ACOF VI Frontier AIV A3"), ACOF VI Frontier AIV A4, L.P. ("ACOF VI Frontier AIV A4"), ACOF VI Frontier AIV A5, L.P. ("ACOF VI Frontier AIV A5"), ACOF VI Frontier AIV A6, L.P. ("ACOF VI Frontier AIV A6"), ACOF VI Frontier AIV A7, L.P. ("ACOF VI Frontier AIV A7"), ACOF VI Frontier AIV A8, L.P. ("ACOF VI Frontier AIV A8"), ACOF VI Frontier AIV A9, L.P. ("ACOF VI Frontier AIV A9"), ACOF VI Frontier AIV A10, L.P. ("ACOF VI Frontier AIV A10"), and ACOF VI Frontier AIV B1, L.P. ("ACOF VI Frontier AIV B1", together with the foregoing entities, the "ACOF Funds"), (continued in next footnote)

F2 · balance_after: ASOF Frontier AIV A1, L.P. ("ASOF Frontier AIV A1"), ASOF Frontier AIV A2, L.P. ("ASOF Frontier AIV A2"), ASOF Frontier AIV A3, L.P. ("ASOF Frontier AIV A3"), ASOF Frontier AIV A4, L.P. ("ASOF Frontier AIV A4"), ASOF Frontier AIV A5, L.P. ("ASOF Frontier AIV A5"), ASOF Frontier AIV A6, L.P. ("ASOF Frontier AIV A6"), ASOF Frontier AIV A7, L.P. ("ASOF Frontier AIV A7"), ASOF Frontier AIV A8, L.P. ("ASOF Frontier AIV A8"), ASOF Frontier AIV A9, L.P. ("ASOF Frontier AIV A9"), ASOF Frontier AIV A10, L.P. ("ASOF Frontier AIV A10"), ASOF Frontier AIV A11, L.P. ("ASOF Frontier AIV A11"), ASOF Frontier AIV B1, L.P. ("ASOF Frontier AIV B1"), (continued in next footnote)

F3 · balance_after: ASOF II Frontier Holdings 1 L.P. ("ASOF II Frontier Holdings 1"), ASOF II Frontier Holdings 2 L.P. ("ASOF II Frontier Holdings 2"), ASOF II Frontier Holdings 3 L.P. ("ASOF II Frontier Holdings 3"), ASOF II Frontier Holdings 4 L.P. ("ASOF II Frontier Holdings 4"), ASOF II Frontier Holdings 5 L.P. ("ASOF II Frontier Holdings 5"), ASOF II Frontier Holdings 6 L.P. ("ASOF II Frontier Holdings 6"), (continued in next footnote)

F4 · balance_after: ASOF II Frontier Holdings 7 L.P. ("ASOF II Frontier Holdings 7"), ASOF II A (DE) Frontier Holdings 1 L.P. ("ASOF II A (DE) Frontier Holdings 1") and ASOF II A (DE) Frontier Holdings 2 L.P. ("ASOF II A (DE) Frontier Holdings 2", and together with ASOF Frontier AIV A1, ASOF Frontier AIV A2, ASOF Frontier AIV A3, ASOF Frontier AIV A4, ASOF Frontier AIV A5, ASOF Frontier AIV A6, ASOF Frontier AIV A7, ASOF Frontier AIV A8, ASOF Frontier AIV A9, ASOF Frontier AIV A10, and ASOF Frontier AIV A11, ASOF II Frontier Holdings 1, ASOF II Frontier Holdings 2, ASOF II Frontier Holdings 3, ASOF II Frontier Holdings 4, ASOF II Frontier Holdings 5, ASOF II Frontier Holdings 6, ASOF II Frontier Holdings 7 and ASOF II A (DE) Frontier Holdings 1, the "ASOF Funds"), (continued in next footnote)

F5 · balance_after: ASSF IV AIV B Holdings III, L.P. ("ASSF IV AIV B Holdings III"), ASSF IV AIV B, L.P. ("ASSF IV AIV B", and together with ASSF IV AIV B Holdings III, the "ASSF Funds"), ACOF Investment Management LLC ("ACOF Investment Management"), ASOF Investment Management LLC ("ASOF Investment Management"), ASSF Operating Manager IV, L.P. ("ASSF Operating Manager IV"), (continued in next footnote)

F6 · balance_after: Ares Management LLC, Ares Management Holdings L.P. ("Ares Management Holdings"), Ares Holdco LLC ("Ares Holdco"), Ares Management Corporation ("Ares Management"), Ares Management GP LLC ("Ares Management GP"), Ares Voting LLC ("Ares Voting") and Ares Partners Holdco LLC ("Ares Partners", and together with the ACOF Funds, the ASOF Funds, the ASSF Funds, ACOF Investment Management, ASOF Investment Management, ASSF Operating Manager IV, Ares Management LLC, Ares Management Holdings, Ares Holdco, Ares Management, Ares Management GP, and Ares Voting, the "Reporting Persons"). Due to the electronic system's limitation of 10 Reporting Persons per joint filing, this statement is being filed in five parts.

F7 · balance_after: The Reporting Persons collectively beneficially own, or may be deemed to beneficially own, in the aggregate 38,512,895 shares of Common Stock by reason of the direct or indirect beneficial ownership of such shares as follows: (i) ACOF VI Frontier AIV A1 owns 258,196 shares of Common Stock; (ii) ACOF VI Frontier AIV A2 owns 92,590 shares of Common Stock; (iii) ACOF VI Frontier AIV A3 owns 21,604 shares of Common Stock; (iv) ACOF VI Frontier AIV A4 owns 280,859 shares of Common Stock; (v) ACOF VI Frontier AIV A5 owns 308,635 shares of Common Stock; (vi) ACOF VI Frontier AIV A6 owns 172,837 shares of Common Stock; (vii) ACOF VI Frontier AIV A7 owns 312,782 shares of Common Stock; (viii) ACOF VI Frontier AIV A8 owns 314,191 shares of Common Stock; (ix) ACOF VI Frontier AIV A9 owns 295,057 shares of Common Stock; (x) ACOF VI Frontier AIV A10 owns 93,301 shares of Common Stock; (xi) ACOF VI Frontier AIV B1 owns 15,574,332 shares of Common Stock; (continued in next footnote)

F8 · balance_after: (xii) ASOF Frontier AIV A1 owns 105,592 shares of Common Stock; (xiii) ASOF Frontier AIV A2 owns 18,032 shares of Common Stock; (xiv) ASOF Frontier AIV A3 owns 830,837 shares of Common Stock; (xv) ASOF Frontier AIV A4 owns 281,844 shares of Common Stock; (xvi) ASOF Frontier AIV A5 owns 167,160 shares of Common Stock; (xvii) ASOF Frontier AIV A6 owns 292,124 shares of Common Stock; (xviii) ASOF Frontier AIV A7 owns 289,417 shares of Common Stock; (xix) ASOF Frontier AIV A8 owns 238,026 shares of Common Stock; (xx) ASOF Frontier AIV A9 owns 360,644 shares of Common Stock; (xxi) ASOF Frontier AIV A10 owns 259,665 shares of Common Stock; (xxii) ASOF Frontier AIV A11 owns 245,236 shares of Common Stock; (xxiii) ASOF Frontier AIV B1 owns 9,597,579 shares of Common Stock; (continued in next footnote)

F9 · balance_after: (xxiv) ASOF II Frontier Holdings 1 owns 1,747,528 shares of Common Stock, (xxv) ASOF II Frontier Holdings 2 owns 84,229 shares of Common Stock, (xxvi) ASOF II Frontier Holdings 3 owns 93,815 shares of Common Stock, (xxvii) ASOF II Frontier Holdings 4 owns 90,925 shares of Common Stock, (xxviii) ASOF II Frontier Holdings 5 owns 90,052 shares of Common Stock, (xxix) ASOF II Frontier Holdings 6 owns 95,433 shares of Common Stock, (xxx) ASOF II Frontier Holdings 7 owns 95,669 shares of Common Stock, (xxxi) ASOF II A (DE) Frontier Holdings 1 owns 418,623 shares of Common Stock; (xxxii) ASOF II A (DE) Frontier Holdings 2 owns 15,405 shares of Common Stock; (xxxiii) ASSF IV AIV B Holdings III owns 2,694,243 shares of Common Stock and (xxxiv) ASSF IV AIV B directly or indirectly owns 5,348,289 shares of Common Stock.

F10 · balance_after: Ares Partners is the sole member of each of Ares Voting and Ares Management GP, which are respectively the holders of the Class B and Class C common stock of Ares Management, which common stock allows them, collectively, to generally have the majority of the votes on any matter submitted to the stockholders of Ares Management if certain conditions are met. Ares Management is the sole member of Ares Holdco, which is the general partner of Ares Management Holdings, which is the sole member of Ares Management LLC, which is: (a) the sole member of ACOF Investment Management, which is the manager of the ACOF Funds, (b) the sole member of ASOF Investment Management, which is the manager of the ASOF Funds, and (c) the general partner of ASSF Operating Manager IV, which is the manager of the ASSF Funds.

F11 · balance_after: Ares Partners is managed by a board of managers, which is composed of Michael J Arougheti, Ryan Berry, R. Kipp deVeer, David B. Kaplan, Antony P. Ressler and Bennett Rosenthal (collectively, the "Board Members"). Mr. Ressler generally has veto authority over Board Members' decisions.

F12 · balance_after: Each of the Reporting Persons, and the Board Members, and the other directors, officers, partners, stockholders, members and managers of the Reporting Persons, expressly disclaims beneficial ownership of the Common Stock, except to the extent of any pecuniary interest therein, and this Form 4 shall not be deemed an admission that any such person or entity is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purposes.

F1 · ownership.nature: This statement is being filed by ACOF VI Frontier AIV A1, L.P. ("ACOF VI Frontier AIV A1"), ACOF VI Frontier AIV A2, L.P. ("ACOF VI Frontier AIV A2"), ACOF VI Frontier AIV A3, L.P. ("ACOF VI Frontier AIV A3"), ACOF VI Frontier AIV A4, L.P. ("ACOF VI Frontier AIV A4"), ACOF VI Frontier AIV A5, L.P. ("ACOF VI Frontier AIV A5"), ACOF VI Frontier AIV A6, L.P. ("ACOF VI Frontier AIV A6"), ACOF VI Frontier AIV A7, L.P. ("ACOF VI Frontier AIV A7"), ACOF VI Frontier AIV A8, L.P. ("ACOF VI Frontier AIV A8"), ACOF VI Frontier AIV A9, L.P. ("ACOF VI Frontier AIV A9"), ACOF VI Frontier AIV A10, L.P. ("ACOF VI Frontier AIV A10"), and ACOF VI Frontier AIV B1, L.P. ("ACOF VI Frontier AIV B1", together with the foregoing entities, the "ACOF Funds"), (continued in next footnote)

F2 · ownership.nature: ASOF Frontier AIV A1, L.P. ("ASOF Frontier AIV A1"), ASOF Frontier AIV A2, L.P. ("ASOF Frontier AIV A2"), ASOF Frontier AIV A3, L.P. ("ASOF Frontier AIV A3"), ASOF Frontier AIV A4, L.P. ("ASOF Frontier AIV A4"), ASOF Frontier AIV A5, L.P. ("ASOF Frontier AIV A5"), ASOF Frontier AIV A6, L.P. ("ASOF Frontier AIV A6"), ASOF Frontier AIV A7, L.P. ("ASOF Frontier AIV A7"), ASOF Frontier AIV A8, L.P. ("ASOF Frontier AIV A8"), ASOF Frontier AIV A9, L.P. ("ASOF Frontier AIV A9"), ASOF Frontier AIV A10, L.P. ("ASOF Frontier AIV A10"), ASOF Frontier AIV A11, L.P. ("ASOF Frontier AIV A11"), ASOF Frontier AIV B1, L.P. ("ASOF Frontier AIV B1"), (continued in next footnote)

F3 · ownership.nature: ASOF II Frontier Holdings 1 L.P. ("ASOF II Frontier Holdings 1"), ASOF II Frontier Holdings 2 L.P. ("ASOF II Frontier Holdings 2"), ASOF II Frontier Holdings 3 L.P. ("ASOF II Frontier Holdings 3"), ASOF II Frontier Holdings 4 L.P. ("ASOF II Frontier Holdings 4"), ASOF II Frontier Holdings 5 L.P. ("ASOF II Frontier Holdings 5"), ASOF II Frontier Holdings 6 L.P. ("ASOF II Frontier Holdings 6"), (continued in next footnote)

F4 · ownership.nature: ASOF II Frontier Holdings 7 L.P. ("ASOF II Frontier Holdings 7"), ASOF II A (DE) Frontier Holdings 1 L.P. ("ASOF II A (DE) Frontier Holdings 1") and ASOF II A (DE) Frontier Holdings 2 L.P. ("ASOF II A (DE) Frontier Holdings 2", and together with ASOF Frontier AIV A1, ASOF Frontier AIV A2, ASOF Frontier AIV A3, ASOF Frontier AIV A4, ASOF Frontier AIV A5, ASOF Frontier AIV A6, ASOF Frontier AIV A7, ASOF Frontier AIV A8, ASOF Frontier AIV A9, ASOF Frontier AIV A10, and ASOF Frontier AIV A11, ASOF II Frontier Holdings 1, ASOF II Frontier Holdings 2, ASOF II Frontier Holdings 3, ASOF II Frontier Holdings 4, ASOF II Frontier Holdings 5, ASOF II Frontier Holdings 6, ASOF II Frontier Holdings 7 and ASOF II A (DE) Frontier Holdings 1, the "ASOF Funds"), (continued in next footnote)

F5 · ownership.nature: ASSF IV AIV B Holdings III, L.P. ("ASSF IV AIV B Holdings III"), ASSF IV AIV B, L.P. ("ASSF IV AIV B", and together with ASSF IV AIV B Holdings III, the "ASSF Funds"), ACOF Investment Management LLC ("ACOF Investment Management"), ASOF Investment Management LLC ("ASOF Investment Management"), ASSF Operating Manager IV, L.P. ("ASSF Operating Manager IV"), (continued in next footnote)

F6 · ownership.nature: Ares Management LLC, Ares Management Holdings L.P. ("Ares Management Holdings"), Ares Holdco LLC ("Ares Holdco"), Ares Management Corporation ("Ares Management"), Ares Management GP LLC ("Ares Management GP"), Ares Voting LLC ("Ares Voting") and Ares Partners Holdco LLC ("Ares Partners", and together with the ACOF Funds, the ASOF Funds, the ASSF Funds, ACOF Investment Management, ASOF Investment Management, ASSF Operating Manager IV, Ares Management LLC, Ares Management Holdings, Ares Holdco, Ares Management, Ares Management GP, and Ares Voting, the "Reporting Persons"). Due to the electronic system's limitation of 10 Reporting Persons per joint filing, this statement is being filed in five parts.

F7 · ownership.nature: The Reporting Persons collectively beneficially own, or may be deemed to beneficially own, in the aggregate 38,512,895 shares of Common Stock by reason of the direct or indirect beneficial ownership of such shares as follows: (i) ACOF VI Frontier AIV A1 owns 258,196 shares of Common Stock; (ii) ACOF VI Frontier AIV A2 owns 92,590 shares of Common Stock; (iii) ACOF VI Frontier AIV A3 owns 21,604 shares of Common Stock; (iv) ACOF VI Frontier AIV A4 owns 280,859 shares of Common Stock; (v) ACOF VI Frontier AIV A5 owns 308,635 shares of Common Stock; (vi) ACOF VI Frontier AIV A6 owns 172,837 shares of Common Stock; (vii) ACOF VI Frontier AIV A7 owns 312,782 shares of Common Stock; (viii) ACOF VI Frontier AIV A8 owns 314,191 shares of Common Stock; (ix) ACOF VI Frontier AIV A9 owns 295,057 shares of Common Stock; (x) ACOF VI Frontier AIV A10 owns 93,301 shares of Common Stock; (xi) ACOF VI Frontier AIV B1 owns 15,574,332 shares of Common Stock; (continued in next footnote)

F8 · ownership.nature: (xii) ASOF Frontier AIV A1 owns 105,592 shares of Common Stock; (xiii) ASOF Frontier AIV A2 owns 18,032 shares of Common Stock; (xiv) ASOF Frontier AIV A3 owns 830,837 shares of Common Stock; (xv) ASOF Frontier AIV A4 owns 281,844 shares of Common Stock; (xvi) ASOF Frontier AIV A5 owns 167,160 shares of Common Stock; (xvii) ASOF Frontier AIV A6 owns 292,124 shares of Common Stock; (xviii) ASOF Frontier AIV A7 owns 289,417 shares of Common Stock; (xix) ASOF Frontier AIV A8 owns 238,026 shares of Common Stock; (xx) ASOF Frontier AIV A9 owns 360,644 shares of Common Stock; (xxi) ASOF Frontier AIV A10 owns 259,665 shares of Common Stock; (xxii) ASOF Frontier AIV A11 owns 245,236 shares of Common Stock; (xxiii) ASOF Frontier AIV B1 owns 9,597,579 shares of Common Stock; (continued in next footnote)

F9 · ownership.nature: (xxiv) ASOF II Frontier Holdings 1 owns 1,747,528 shares of Common Stock, (xxv) ASOF II Frontier Holdings 2 owns 84,229 shares of Common Stock, (xxvi) ASOF II Frontier Holdings 3 owns 93,815 shares of Common Stock, (xxvii) ASOF II Frontier Holdings 4 owns 90,925 shares of Common Stock, (xxviii) ASOF II Frontier Holdings 5 owns 90,052 shares of Common Stock, (xxix) ASOF II Frontier Holdings 6 owns 95,433 shares of Common Stock, (xxx) ASOF II Frontier Holdings 7 owns 95,669 shares of Common Stock, (xxxi) ASOF II A (DE) Frontier Holdings 1 owns 418,623 shares of Common Stock; (xxxii) ASOF II A (DE) Frontier Holdings 2 owns 15,405 shares of Common Stock; (xxxiii) ASSF IV AIV B Holdings III owns 2,694,243 shares of Common Stock and (xxxiv) ASSF IV AIV B directly or indirectly owns 5,348,289 shares of Common Stock.

F10 · ownership.nature: Ares Partners is the sole member of each of Ares Voting and Ares Management GP, which are respectively the holders of the Class B and Class C common stock of Ares Management, which common stock allows them, collectively, to generally have the majority of the votes on any matter submitted to the stockholders of Ares Management if certain conditions are met. Ares Management is the sole member of Ares Holdco, which is the general partner of Ares Management Holdings, which is the sole member of Ares Management LLC, which is: (a) the sole member of ACOF Investment Management, which is the manager of the ACOF Funds, (b) the sole member of ASOF Investment Management, which is the manager of the ASOF Funds, and (c) the general partner of ASSF Operating Manager IV, which is the manager of the ASSF Funds.

F11 · ownership.nature: Ares Partners is managed by a board of managers, which is composed of Michael J Arougheti, Ryan Berry, R. Kipp deVeer, David B. Kaplan, Antony P. Ressler and Bennett Rosenthal (collectively, the "Board Members"). Mr. Ressler generally has veto authority over Board Members' decisions.

F12 · ownership.nature: Each of the Reporting Persons, and the Board Members, and the other directors, officers, partners, stockholders, members and managers of the Reporting Persons, expressly disclaims beneficial ownership of the Common Stock, except to the extent of any pecuniary interest therein, and this Form 4 shall not be deemed an admission that any such person or entity is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purposes.

SEC source: 0001104659-23-096972 · tm2325138-1_4seq1.xml · nonDerivative · entry 1

ARES MANAGEMENT LLC · CIK 0001259313 · 10% owner

ACOF VI Frontier AIV A1, L.P. · CIK 0001862494 · 10% owner

ACOF VI Frontier AIV A2, L.P. · CIK 0001862499 · 10% owner

ACOF VI Frontier AIV A3, L.P. · CIK 0001862534 · 10% owner

ACOF VI Frontier AIV A4, L.P. · CIK 0001862529 · Director

ACOF VI Frontier AIV A5, L.P. · CIK 0001862526 · Director

ACOF VI Frontier AIV A6, L.P. · CIK 0001862483 · 10% owner

ACOF VI Frontier AIV A7, L.P. · CIK 0001862482 · 10% owner

ACOF VI Frontier AIV A8, L.P. · CIK 0001862505 · 10% owner

ACOF VI Frontier AIV A9, L.P. · CIK 0001862533 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnotes

Disclosed balance after: 38,362,895

F1 · balance_after: This statement is being filed by ACOF VI Frontier AIV A1, L.P. ("ACOF VI Frontier AIV A1"), ACOF VI Frontier AIV A2, L.P. ("ACOF VI Frontier AIV A2"), ACOF VI Frontier AIV A3, L.P. ("ACOF VI Frontier AIV A3"), ACOF VI Frontier AIV A4, L.P. ("ACOF VI Frontier AIV A4"), ACOF VI Frontier AIV A5, L.P. ("ACOF VI Frontier AIV A5"), ACOF VI Frontier AIV A6, L.P. ("ACOF VI Frontier AIV A6"), ACOF VI Frontier AIV A7, L.P. ("ACOF VI Frontier AIV A7"), ACOF VI Frontier AIV A8, L.P. ("ACOF VI Frontier AIV A8"), ACOF VI Frontier AIV A9, L.P. ("ACOF VI Frontier AIV A9"), ACOF VI Frontier AIV A10, L.P. ("ACOF VI Frontier AIV A10"), and ACOF VI Frontier AIV B1, L.P. ("ACOF VI Frontier AIV B1", together with the foregoing entities, the "ACOF Funds"), (continued in next footnote)

F2 · balance_after: ASOF Frontier AIV A1, L.P. ("ASOF Frontier AIV A1"), ASOF Frontier AIV A2, L.P. ("ASOF Frontier AIV A2"), ASOF Frontier AIV A3, L.P. ("ASOF Frontier AIV A3"), ASOF Frontier AIV A4, L.P. ("ASOF Frontier AIV A4"), ASOF Frontier AIV A5, L.P. ("ASOF Frontier AIV A5"), ASOF Frontier AIV A6, L.P. ("ASOF Frontier AIV A6"), ASOF Frontier AIV A7, L.P. ("ASOF Frontier AIV A7"), ASOF Frontier AIV A8, L.P. ("ASOF Frontier AIV A8"), ASOF Frontier AIV A9, L.P. ("ASOF Frontier AIV A9"), ASOF Frontier AIV A10, L.P. ("ASOF Frontier AIV A10"), ASOF Frontier AIV A11, L.P. ("ASOF Frontier AIV A11"), ASOF Frontier AIV B1, L.P. ("ASOF Frontier AIV B1"), (continued in next footnote)

F3 · balance_after: ASOF II Frontier Holdings 1 L.P. ("ASOF II Frontier Holdings 1"), ASOF II Frontier Holdings 2 L.P. ("ASOF II Frontier Holdings 2"), ASOF II Frontier Holdings 3 L.P. ("ASOF II Frontier Holdings 3"), ASOF II Frontier Holdings 4 L.P. ("ASOF II Frontier Holdings 4"), ASOF II Frontier Holdings 5 L.P. ("ASOF II Frontier Holdings 5"), ASOF II Frontier Holdings 6 L.P. ("ASOF II Frontier Holdings 6"), (continued in next footnote)

F4 · balance_after: ASOF II Frontier Holdings 7 L.P. ("ASOF II Frontier Holdings 7"), ASOF II A (DE) Frontier Holdings 1 L.P. ("ASOF II A (DE) Frontier Holdings 1") and ASOF II A (DE) Frontier Holdings 2 L.P. ("ASOF II A (DE) Frontier Holdings 2", and together with ASOF Frontier AIV A1, ASOF Frontier AIV A2, ASOF Frontier AIV A3, ASOF Frontier AIV A4, ASOF Frontier AIV A5, ASOF Frontier AIV A6, ASOF Frontier AIV A7, ASOF Frontier AIV A8, ASOF Frontier AIV A9, ASOF Frontier AIV A10, and ASOF Frontier AIV A11, ASOF II Frontier Holdings 1, ASOF II Frontier Holdings 2, ASOF II Frontier Holdings 3, ASOF II Frontier Holdings 4, ASOF II Frontier Holdings 5, ASOF II Frontier Holdings 6, ASOF II Frontier Holdings 7 and ASOF II A (DE) Frontier Holdings 1, the "ASOF Funds"), (continued in next footnote)

F5 · balance_after: ASSF IV AIV B Holdings III, L.P. ("ASSF IV AIV B Holdings III"), ASSF IV AIV B, L.P. ("ASSF IV AIV B", and together with ASSF IV AIV B Holdings III, the "ASSF Funds"), ACOF Investment Management LLC ("ACOF Investment Management"), ASOF Investment Management LLC ("ASOF Investment Management"), ASSF Operating Manager IV, L.P. ("ASSF Operating Manager IV"), (continued in next footnote)

F6 · balance_after: Ares Management LLC, Ares Management Holdings L.P. ("Ares Management Holdings"), Ares Holdco LLC ("Ares Holdco"), Ares Management Corporation ("Ares Management"), Ares Management GP LLC ("Ares Management GP"), Ares Voting LLC ("Ares Voting") and Ares Partners Holdco LLC ("Ares Partners", and together with the ACOF Funds, the ASOF Funds, the ASSF Funds, ACOF Investment Management, ASOF Investment Management, ASSF Operating Manager IV, Ares Management LLC, Ares Management Holdings, Ares Holdco, Ares Management, Ares Management GP, and Ares Voting, the "Reporting Persons"). Due to the electronic system's limitation of 10 Reporting Persons per joint filing, this statement is being filed in five parts.

F7 · balance_after: The Reporting Persons collectively beneficially own, or may be deemed to beneficially own, in the aggregate 38,362,895 shares of Common Stock by reason of the direct or indirect beneficial ownership of such shares as follows: (i) ACOF VI Frontier AIV A1 owns 258,196 shares of Common Stock; (ii) ACOF VI Frontier AIV A2 owns 92,590 shares of Common Stock; (iii) ACOF VI Frontier AIV A3 owns 21,604 shares of Common Stock; (iv) ACOF VI Frontier AIV A4 owns 280,859 shares of Common Stock; (v) ACOF VI Frontier AIV A5 owns 308,635 shares of Common Stock; (vi) ACOF VI Frontier AIV A6 owns 172,837 shares of Common Stock; (vii) ACOF VI Frontier AIV A7 owns 312,782 shares of Common Stock; (viii) ACOF VI Frontier AIV A8 owns 314,191 shares of Common Stock; (ix) ACOF VI Frontier AIV A9 owns 295,057 shares of Common Stock; (x) ACOF VI Frontier AIV A10 owns 93,301 shares of Common Stock; (xi) ACOF VI Frontier AIV B1 owns 15,574,332 shares of Common Stock; (continued in next footnote)

F8 · balance_after: (xii) ASOF Frontier AIV A1 owns 105,592 shares of Common Stock; (xiii) ASOF Frontier AIV A2 owns 18,032 shares of Common Stock; (xiv) ASOF Frontier AIV A3 owns 830,837 shares of Common Stock; (xv) ASOF Frontier AIV A4 owns 281,844 shares of Common Stock; (xvi) ASOF Frontier AIV A5 owns 167,160 shares of Common Stock; (xvii) ASOF Frontier AIV A6 owns 292,124 shares of Common Stock; (xviii) ASOF Frontier AIV A7 owns 289,417 shares of Common Stock; (xix) ASOF Frontier AIV A8 owns 238,026 shares of Common Stock; (xx) ASOF Frontier AIV A9 owns 360,644 shares of Common Stock; (xxi) ASOF Frontier AIV A10 owns 259,665 shares of Common Stock; (xxii) ASOF Frontier AIV A11 owns 245,236 shares of Common Stock; (xxiii) ASOF Frontier AIV B1 owns 9,597,579 shares of Common Stock; (continued in next footnote)

F9 · balance_after: (xxiv) ASOF II Frontier Holdings 1 owns 1,651,569 shares of Common Stock, (xxv) ASOF II Frontier Holdings 2 owns 79,603 shares of Common Stock, (xxvi) ASOF II Frontier Holdings 3 owns 88,663 shares of Common Stock, (xxvii) ASOF II Frontier Holdings 4 owns 85,933 shares of Common Stock, (xxviii) ASOF II Frontier Holdings 5 owns 85,108 shares of Common Stock, (xxix) ASOF II Frontier Holdings 6 owns 90,192 shares of Common Stock, (xxx) ASOF II Frontier Holdings 7 owns 90,415 shares of Common Stock, (xxxi) ASOF II A (DE) Frontier Holdings 1 owns 395,636 shares of Common Stock; (xxxii) ASOF II A (DE) Frontier Holdings 2 owns 14,560 shares of Common Stock; (xxxiii) ASSF IV AIV B Holdings III owns 2,694,243 shares of Common Stock and (xxxiv) ASSF IV AIV B directly or indirectly owns 5,348,289 shares of Common Stock.

F10 · balance_after: Ares Partners is the sole member of each of Ares Voting and Ares Management GP, which are respectively the holders of the Class B and Class C common stock of Ares Management, which common stock allows them, collectively, to generally have the majority of the votes on any matter submitted to the stockholders of Ares Management if certain conditions are met. Ares Management is the sole member of Ares Holdco, which is the general partner of Ares Management Holdings, which is the sole member of Ares Management LLC, which is: (a) the sole member of ACOF Investment Management, which is the manager of the ACOF Funds, (b) the sole member of ASOF Investment Management, which is the manager of the ASOF Funds, and (c) the general partner of ASSF Operating Manager IV, which is the manager of the ASSF Funds.

F11 · balance_after: Ares Partners is managed by a board of managers, which is composed of Michael J Arougheti, Ryan Berry, R. Kipp deVeer, David B. Kaplan, Antony P. Ressler and Bennett Rosenthal (collectively, the "Board Members"). Mr. Ressler generally has veto authority over Board Members' decisions.

F12 · balance_after: Each of the Reporting Persons, and the Board Members, and the other directors, officers, partners, stockholders, members and managers of the Reporting Persons, expressly disclaims beneficial ownership of the Common Stock, except to the extent of any pecuniary interest therein, and this Form 4 shall not be deemed an admission that any such person or entity is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purposes.

F1 · ownership.nature: This statement is being filed by ACOF VI Frontier AIV A1, L.P. ("ACOF VI Frontier AIV A1"), ACOF VI Frontier AIV A2, L.P. ("ACOF VI Frontier AIV A2"), ACOF VI Frontier AIV A3, L.P. ("ACOF VI Frontier AIV A3"), ACOF VI Frontier AIV A4, L.P. ("ACOF VI Frontier AIV A4"), ACOF VI Frontier AIV A5, L.P. ("ACOF VI Frontier AIV A5"), ACOF VI Frontier AIV A6, L.P. ("ACOF VI Frontier AIV A6"), ACOF VI Frontier AIV A7, L.P. ("ACOF VI Frontier AIV A7"), ACOF VI Frontier AIV A8, L.P. ("ACOF VI Frontier AIV A8"), ACOF VI Frontier AIV A9, L.P. ("ACOF VI Frontier AIV A9"), ACOF VI Frontier AIV A10, L.P. ("ACOF VI Frontier AIV A10"), and ACOF VI Frontier AIV B1, L.P. ("ACOF VI Frontier AIV B1", together with the foregoing entities, the "ACOF Funds"), (continued in next footnote)

F2 · ownership.nature: ASOF Frontier AIV A1, L.P. ("ASOF Frontier AIV A1"), ASOF Frontier AIV A2, L.P. ("ASOF Frontier AIV A2"), ASOF Frontier AIV A3, L.P. ("ASOF Frontier AIV A3"), ASOF Frontier AIV A4, L.P. ("ASOF Frontier AIV A4"), ASOF Frontier AIV A5, L.P. ("ASOF Frontier AIV A5"), ASOF Frontier AIV A6, L.P. ("ASOF Frontier AIV A6"), ASOF Frontier AIV A7, L.P. ("ASOF Frontier AIV A7"), ASOF Frontier AIV A8, L.P. ("ASOF Frontier AIV A8"), ASOF Frontier AIV A9, L.P. ("ASOF Frontier AIV A9"), ASOF Frontier AIV A10, L.P. ("ASOF Frontier AIV A10"), ASOF Frontier AIV A11, L.P. ("ASOF Frontier AIV A11"), ASOF Frontier AIV B1, L.P. ("ASOF Frontier AIV B1"), (continued in next footnote)

F3 · ownership.nature: ASOF II Frontier Holdings 1 L.P. ("ASOF II Frontier Holdings 1"), ASOF II Frontier Holdings 2 L.P. ("ASOF II Frontier Holdings 2"), ASOF II Frontier Holdings 3 L.P. ("ASOF II Frontier Holdings 3"), ASOF II Frontier Holdings 4 L.P. ("ASOF II Frontier Holdings 4"), ASOF II Frontier Holdings 5 L.P. ("ASOF II Frontier Holdings 5"), ASOF II Frontier Holdings 6 L.P. ("ASOF II Frontier Holdings 6"), (continued in next footnote)

F4 · ownership.nature: ASOF II Frontier Holdings 7 L.P. ("ASOF II Frontier Holdings 7"), ASOF II A (DE) Frontier Holdings 1 L.P. ("ASOF II A (DE) Frontier Holdings 1") and ASOF II A (DE) Frontier Holdings 2 L.P. ("ASOF II A (DE) Frontier Holdings 2", and together with ASOF Frontier AIV A1, ASOF Frontier AIV A2, ASOF Frontier AIV A3, ASOF Frontier AIV A4, ASOF Frontier AIV A5, ASOF Frontier AIV A6, ASOF Frontier AIV A7, ASOF Frontier AIV A8, ASOF Frontier AIV A9, ASOF Frontier AIV A10, and ASOF Frontier AIV A11, ASOF II Frontier Holdings 1, ASOF II Frontier Holdings 2, ASOF II Frontier Holdings 3, ASOF II Frontier Holdings 4, ASOF II Frontier Holdings 5, ASOF II Frontier Holdings 6, ASOF II Frontier Holdings 7 and ASOF II A (DE) Frontier Holdings 1, the "ASOF Funds"), (continued in next footnote)

F5 · ownership.nature: ASSF IV AIV B Holdings III, L.P. ("ASSF IV AIV B Holdings III"), ASSF IV AIV B, L.P. ("ASSF IV AIV B", and together with ASSF IV AIV B Holdings III, the "ASSF Funds"), ACOF Investment Management LLC ("ACOF Investment Management"), ASOF Investment Management LLC ("ASOF Investment Management"), ASSF Operating Manager IV, L.P. ("ASSF Operating Manager IV"), (continued in next footnote)

F6 · ownership.nature: Ares Management LLC, Ares Management Holdings L.P. ("Ares Management Holdings"), Ares Holdco LLC ("Ares Holdco"), Ares Management Corporation ("Ares Management"), Ares Management GP LLC ("Ares Management GP"), Ares Voting LLC ("Ares Voting") and Ares Partners Holdco LLC ("Ares Partners", and together with the ACOF Funds, the ASOF Funds, the ASSF Funds, ACOF Investment Management, ASOF Investment Management, ASSF Operating Manager IV, Ares Management LLC, Ares Management Holdings, Ares Holdco, Ares Management, Ares Management GP, and Ares Voting, the "Reporting Persons"). Due to the electronic system's limitation of 10 Reporting Persons per joint filing, this statement is being filed in five parts.

F7 · ownership.nature: The Reporting Persons collectively beneficially own, or may be deemed to beneficially own, in the aggregate 38,362,895 shares of Common Stock by reason of the direct or indirect beneficial ownership of such shares as follows: (i) ACOF VI Frontier AIV A1 owns 258,196 shares of Common Stock; (ii) ACOF VI Frontier AIV A2 owns 92,590 shares of Common Stock; (iii) ACOF VI Frontier AIV A3 owns 21,604 shares of Common Stock; (iv) ACOF VI Frontier AIV A4 owns 280,859 shares of Common Stock; (v) ACOF VI Frontier AIV A5 owns 308,635 shares of Common Stock; (vi) ACOF VI Frontier AIV A6 owns 172,837 shares of Common Stock; (vii) ACOF VI Frontier AIV A7 owns 312,782 shares of Common Stock; (viii) ACOF VI Frontier AIV A8 owns 314,191 shares of Common Stock; (ix) ACOF VI Frontier AIV A9 owns 295,057 shares of Common Stock; (x) ACOF VI Frontier AIV A10 owns 93,301 shares of Common Stock; (xi) ACOF VI Frontier AIV B1 owns 15,574,332 shares of Common Stock; (continued in next footnote)

F8 · ownership.nature: (xii) ASOF Frontier AIV A1 owns 105,592 shares of Common Stock; (xiii) ASOF Frontier AIV A2 owns 18,032 shares of Common Stock; (xiv) ASOF Frontier AIV A3 owns 830,837 shares of Common Stock; (xv) ASOF Frontier AIV A4 owns 281,844 shares of Common Stock; (xvi) ASOF Frontier AIV A5 owns 167,160 shares of Common Stock; (xvii) ASOF Frontier AIV A6 owns 292,124 shares of Common Stock; (xviii) ASOF Frontier AIV A7 owns 289,417 shares of Common Stock; (xix) ASOF Frontier AIV A8 owns 238,026 shares of Common Stock; (xx) ASOF Frontier AIV A9 owns 360,644 shares of Common Stock; (xxi) ASOF Frontier AIV A10 owns 259,665 shares of Common Stock; (xxii) ASOF Frontier AIV A11 owns 245,236 shares of Common Stock; (xxiii) ASOF Frontier AIV B1 owns 9,597,579 shares of Common Stock; (continued in next footnote)

F9 · ownership.nature: (xxiv) ASOF II Frontier Holdings 1 owns 1,651,569 shares of Common Stock, (xxv) ASOF II Frontier Holdings 2 owns 79,603 shares of Common Stock, (xxvi) ASOF II Frontier Holdings 3 owns 88,663 shares of Common Stock, (xxvii) ASOF II Frontier Holdings 4 owns 85,933 shares of Common Stock, (xxviii) ASOF II Frontier Holdings 5 owns 85,108 shares of Common Stock, (xxix) ASOF II Frontier Holdings 6 owns 90,192 shares of Common Stock, (xxx) ASOF II Frontier Holdings 7 owns 90,415 shares of Common Stock, (xxxi) ASOF II A (DE) Frontier Holdings 1 owns 395,636 shares of Common Stock; (xxxii) ASOF II A (DE) Frontier Holdings 2 owns 14,560 shares of Common Stock; (xxxiii) ASSF IV AIV B Holdings III owns 2,694,243 shares of Common Stock and (xxxiv) ASSF IV AIV B directly or indirectly owns 5,348,289 shares of Common Stock.

F10 · ownership.nature: Ares Partners is the sole member of each of Ares Voting and Ares Management GP, which are respectively the holders of the Class B and Class C common stock of Ares Management, which common stock allows them, collectively, to generally have the majority of the votes on any matter submitted to the stockholders of Ares Management if certain conditions are met. Ares Management is the sole member of Ares Holdco, which is the general partner of Ares Management Holdings, which is the sole member of Ares Management LLC, which is: (a) the sole member of ACOF Investment Management, which is the manager of the ACOF Funds, (b) the sole member of ASOF Investment Management, which is the manager of the ASOF Funds, and (c) the general partner of ASSF Operating Manager IV, which is the manager of the ASSF Funds.

F11 · ownership.nature: Ares Partners is managed by a board of managers, which is composed of Michael J Arougheti, Ryan Berry, R. Kipp deVeer, David B. Kaplan, Antony P. Ressler and Bennett Rosenthal (collectively, the "Board Members"). Mr. Ressler generally has veto authority over Board Members' decisions.

F12 · ownership.nature: Each of the Reporting Persons, and the Board Members, and the other directors, officers, partners, stockholders, members and managers of the Reporting Persons, expressly disclaims beneficial ownership of the Common Stock, except to the extent of any pecuniary interest therein, and this Form 4 shall not be deemed an admission that any such person or entity is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purposes.

SEC source: 0001104659-23-095958 · tm2324930-1_4seq1.xml · nonDerivative · entry 1

ARES MANAGEMENT LLC · CIK 0001259313 · 10% owner

ACOF VI Frontier AIV A1, L.P. · CIK 0001862494 · 10% owner

ACOF VI Frontier AIV A2, L.P. · CIK 0001862499 · 10% owner

ACOF VI Frontier AIV A3, L.P. · CIK 0001862534 · 10% owner

ACOF VI Frontier AIV A4, L.P. · CIK 0001862529 · Director

ACOF VI Frontier AIV A5, L.P. · CIK 0001862526 · Director

ACOF VI Frontier AIV A6, L.P. · CIK 0001862483 · 10% owner

ACOF VI Frontier AIV A7, L.P. · CIK 0001862482 · 10% owner

ACOF VI Frontier AIV A8, L.P. · CIK 0001862505 · 10% owner

ACOF VI Frontier AIV A9, L.P. · CIK 0001862533 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnotes

Disclosed balance after: 38,355,498

F1 · balance_after: This statement is being filed by ACOF VI Frontier AIV A1, L.P. ("ACOF VI Frontier AIV A1"), ACOF VI Frontier AIV A2, L.P. ("ACOF VI Frontier AIV A2"), ACOF VI Frontier AIV A3, L.P. ("ACOF VI Frontier AIV A3"), ACOF VI Frontier AIV A4, L.P. ("ACOF VI Frontier AIV A4"), ACOF VI Frontier AIV A5, L.P. ("ACOF VI Frontier AIV A5"), ACOF VI Frontier AIV A6, L.P. ("ACOF VI Frontier AIV A6"), ACOF VI Frontier AIV A7, L.P. ("ACOF VI Frontier AIV A7"), ACOF VI Frontier AIV A8, L.P. ("ACOF VI Frontier AIV A8"), ACOF VI Frontier AIV A9, L.P. ("ACOF VI Frontier AIV A9"), ACOF VI Frontier AIV A10, L.P. ("ACOF VI Frontier AIV A10"), and ACOF VI Frontier AIV B1, L.P. ("ACOF VI Frontier AIV B1", together with the foregoing entities, the "ACOF Funds"), (continued in next footnote)

F2 · balance_after: ASOF Frontier AIV A1, L.P. ("ASOF Frontier AIV A1"), ASOF Frontier AIV A2, L.P. ("ASOF Frontier AIV A2"), ASOF Frontier AIV A3, L.P. ("ASOF Frontier AIV A3"), ASOF Frontier AIV A4, L.P. ("ASOF Frontier AIV A4"), ASOF Frontier AIV A5, L.P. ("ASOF Frontier AIV A5"), ASOF Frontier AIV A6, L.P. ("ASOF Frontier AIV A6"), ASOF Frontier AIV A7, L.P. ("ASOF Frontier AIV A7"), ASOF Frontier AIV A8, L.P. ("ASOF Frontier AIV A8"), ASOF Frontier AIV A9, L.P. ("ASOF Frontier AIV A9"), ASOF Frontier AIV A10, L.P. ("ASOF Frontier AIV A10"), ASOF Frontier AIV A11, L.P. ("ASOF Frontier AIV A11"), ASOF Frontier AIV B1, L.P. ("ASOF Frontier AIV B1"), (continued in next footnote)

F3 · balance_after: ASOF II Frontier Holdings 1 L.P. ("ASOF II Frontier Holdings 1"), ASOF II Frontier Holdings 2 L.P. ("ASOF II Frontier Holdings 2"), ASOF II Frontier Holdings 3 L.P. ("ASOF II Frontier Holdings 3"), ASOF II Frontier Holdings 4 L.P. ("ASOF II Frontier Holdings 4"), ASOF II Frontier Holdings 5 L.P. ("ASOF II Frontier Holdings 5"), ASOF II Frontier Holdings 6 L.P. ("ASOF II Frontier Holdings 6"), (continued in next footnote)

F4 · balance_after: ASOF II Frontier Holdings 7 L.P. ("ASOF II Frontier Holdings 7"), ASOF II A (DE) Frontier Holdings 1 L.P. ("ASOF II A (DE) Frontier Holdings 1") and ASOF II A (DE) Frontier Holdings 2 L.P. ("ASOF II A (DE) Frontier Holdings 2", and together with ASOF Frontier AIV A1, ASOF Frontier AIV A2, ASOF Frontier AIV A3, ASOF Frontier AIV A4, ASOF Frontier AIV A5, ASOF Frontier AIV A6, ASOF Frontier AIV A7, ASOF Frontier AIV A8, ASOF Frontier AIV A9, ASOF Frontier AIV A10, and ASOF Frontier AIV A11, ASOF II Frontier Holdings 1, ASOF II Frontier Holdings 2, ASOF II Frontier Holdings 3, ASOF II Frontier Holdings 4, ASOF II Frontier Holdings 5, ASOF II Frontier Holdings 6, ASOF II Frontier Holdings 7 and ASOF II A (DE) Frontier Holdings 1, the "ASOF Funds"), (continued in next footnote)

F5 · balance_after: ASSF IV AIV B Holdings III, L.P. ("ASSF IV AIV B Holdings III"), ASSF IV AIV B, L.P. ("ASSF IV AIV B", and together with ASSF IV AIV B Holdings III, the "ASSF Funds"), ACOF Investment Management LLC ("ACOF Investment Management"), ASOF Investment Management LLC ("ASOF Investment Management"), ASSF Operating Manager IV, L.P. ("ASSF Operating Manager IV"), (continued in next footnote)

F6 · balance_after: Ares Management LLC, Ares Management Holdings L.P. ("Ares Management Holdings"), Ares Holdco LLC ("Ares Holdco"), Ares Management Corporation ("Ares Management"), Ares Management GP LLC ("Ares Management GP"), Ares Voting LLC ("Ares Voting") and Ares Partners Holdco LLC ("Ares Partners", and together with the ACOF Funds, the ASOF Funds, the ASSF Funds, ACOF Investment Management, ASOF Investment Management, ASSF Operating Manager IV, Ares Management LLC, Ares Management Holdings, Ares Holdco, Ares Management, Ares Management GP, and Ares Voting, the "Reporting Persons"). Due to the electronic system's limitation of 10 Reporting Persons per joint filing, this statement is being filed in five parts.

F7 · balance_after: The Reporting Persons collectively beneficially own, or may be deemed to beneficially own, in the aggregate 38,355,498 shares of Common Stock by reason of the direct or indirect beneficial ownership of such shares as follows: (i) ACOF VI Frontier AIV A1 owns 258,196 shares of Common Stock; (ii) ACOF VI Frontier AIV A2 owns 92,590 shares of Common Stock; (iii) ACOF VI Frontier AIV A3 owns 21,604 shares of Common Stock; (iv) ACOF VI Frontier AIV A4 owns 280,859 shares of Common Stock; (v) ACOF VI Frontier AIV A5 owns 308,635 shares of Common Stock; (vi) ACOF VI Frontier AIV A6 owns 172,837 shares of Common Stock; (vii) ACOF VI Frontier AIV A7 owns 312,782 shares of Common Stock; (viii) ACOF VI Frontier AIV A8 owns 314,191 shares of Common Stock; (ix) ACOF VI Frontier AIV A9 owns 295,057 shares of Common Stock; (x) ACOF VI Frontier AIV A10 owns 93,301 shares of Common Stock; (xi) ACOF VI Frontier AIV B1 owns 15,574,332 shares of Common Stock; (continued in next footnote)

F8 · balance_after: (xii) ASOF Frontier AIV A1 owns 105,592 shares of Common Stock; (xiii) ASOF Frontier AIV A2 owns 18,032 shares of Common Stock; (xiv) ASOF Frontier AIV A3 owns 830,837 shares of Common Stock; (xv) ASOF Frontier AIV A4 owns 281,844 shares of Common Stock; (xvi) ASOF Frontier AIV A5 owns 167,160 shares of Common Stock; (xvii) ASOF Frontier AIV A6 owns 292,124 shares of Common Stock; (xviii) ASOF Frontier AIV A7 owns 289,417 shares of Common Stock; (xix) ASOF Frontier AIV A8 owns 238,026 shares of Common Stock; (xx) ASOF Frontier AIV A9 owns 360,644 shares of Common Stock; (xxi) ASOF Frontier AIV A10 owns 259,665 shares of Common Stock; (xxii) ASOF Frontier AIV A11 owns 245,236 shares of Common Stock; (xxiii) ASOF Frontier AIV B1 owns 9,597,579 shares of Common Stock; (continued in next footnote)

F9 · balance_after: (xxiv) ASOF II Frontier Holdings 1 owns 1,646,837 shares of Common Stock, (xxv) ASOF II Frontier Holdings 2 owns 79,375 shares of Common Stock, (xxvi) ASOF II Frontier Holdings 3 owns 88,409 shares of Common Stock, (xxvii) ASOF II Frontier Holdings 4 owns 85,687 shares of Common Stock, (xxviii) ASOF II Frontier Holdings 5 owns 84,864 shares of Common Stock, (xxix) ASOF II Frontier Holdings 6 owns 89,934 shares of Common Stock, (xxx) ASOF II Frontier Holdings 7 owns 90,156 shares of Common Stock, (xxxi) ASOF II A (DE) Frontier Holdings 1 owns 394,502 shares of Common Stock; (xxxii) ASOF II A (DE) Frontier Holdings 2 owns 14,518 shares of Common Stock; (xxxiii) ASSF IV AIV B Holdings III owns 2,694,243 shares of Common Stock and (xxxiv) ASSF IV AIV B directly or indirectly owns 5,348,289 shares of Common Stock.

F10 · balance_after: Ares Partners is the sole member of each of Ares Voting and Ares Management GP, which are respectively the holders of the Class B and Class C common stock of Ares Management, which common stock allows them, collectively, to generally have the majority of the votes on any matter submitted to the stockholders of Ares Management if certain conditions are met. Ares Management is the sole member of Ares Holdco, which is the general partner of Ares Management Holdings, which is the sole member of Ares Management LLC, which is: (a) the sole member of ACOF Investment Management, which is the manager of the ACOF Funds, (b) the sole member of ASOF Investment Management, which is the manager of the ASOF Funds, and (c) the general partner of ASSF Operating Manager IV, which is the manager of the ASSF Funds.

F11 · balance_after: Ares Partners is managed by a board of managers, which is composed of Michael J Arougheti, Ryan Berry, R. Kipp deVeer, David B. Kaplan, Antony P. Ressler and Bennett Rosenthal (collectively, the "Board Members"). Mr. Ressler generally has veto authority over Board Members' decisions.

F12 · balance_after: Each of the Reporting Persons, and the Board Members, and the other directors, officers, partners, stockholders, members and managers of the Reporting Persons, expressly disclaims beneficial ownership of the Common Stock, except to the extent of any pecuniary interest therein, and this Form 4 shall not be deemed an admission that any such person or entity is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purposes.

F1 · ownership.nature: This statement is being filed by ACOF VI Frontier AIV A1, L.P. ("ACOF VI Frontier AIV A1"), ACOF VI Frontier AIV A2, L.P. ("ACOF VI Frontier AIV A2"), ACOF VI Frontier AIV A3, L.P. ("ACOF VI Frontier AIV A3"), ACOF VI Frontier AIV A4, L.P. ("ACOF VI Frontier AIV A4"), ACOF VI Frontier AIV A5, L.P. ("ACOF VI Frontier AIV A5"), ACOF VI Frontier AIV A6, L.P. ("ACOF VI Frontier AIV A6"), ACOF VI Frontier AIV A7, L.P. ("ACOF VI Frontier AIV A7"), ACOF VI Frontier AIV A8, L.P. ("ACOF VI Frontier AIV A8"), ACOF VI Frontier AIV A9, L.P. ("ACOF VI Frontier AIV A9"), ACOF VI Frontier AIV A10, L.P. ("ACOF VI Frontier AIV A10"), and ACOF VI Frontier AIV B1, L.P. ("ACOF VI Frontier AIV B1", together with the foregoing entities, the "ACOF Funds"), (continued in next footnote)

F2 · ownership.nature: ASOF Frontier AIV A1, L.P. ("ASOF Frontier AIV A1"), ASOF Frontier AIV A2, L.P. ("ASOF Frontier AIV A2"), ASOF Frontier AIV A3, L.P. ("ASOF Frontier AIV A3"), ASOF Frontier AIV A4, L.P. ("ASOF Frontier AIV A4"), ASOF Frontier AIV A5, L.P. ("ASOF Frontier AIV A5"), ASOF Frontier AIV A6, L.P. ("ASOF Frontier AIV A6"), ASOF Frontier AIV A7, L.P. ("ASOF Frontier AIV A7"), ASOF Frontier AIV A8, L.P. ("ASOF Frontier AIV A8"), ASOF Frontier AIV A9, L.P. ("ASOF Frontier AIV A9"), ASOF Frontier AIV A10, L.P. ("ASOF Frontier AIV A10"), ASOF Frontier AIV A11, L.P. ("ASOF Frontier AIV A11"), ASOF Frontier AIV B1, L.P. ("ASOF Frontier AIV B1"), (continued in next footnote)

F3 · ownership.nature: ASOF II Frontier Holdings 1 L.P. ("ASOF II Frontier Holdings 1"), ASOF II Frontier Holdings 2 L.P. ("ASOF II Frontier Holdings 2"), ASOF II Frontier Holdings 3 L.P. ("ASOF II Frontier Holdings 3"), ASOF II Frontier Holdings 4 L.P. ("ASOF II Frontier Holdings 4"), ASOF II Frontier Holdings 5 L.P. ("ASOF II Frontier Holdings 5"), ASOF II Frontier Holdings 6 L.P. ("ASOF II Frontier Holdings 6"), (continued in next footnote)

F4 · ownership.nature: ASOF II Frontier Holdings 7 L.P. ("ASOF II Frontier Holdings 7"), ASOF II A (DE) Frontier Holdings 1 L.P. ("ASOF II A (DE) Frontier Holdings 1") and ASOF II A (DE) Frontier Holdings 2 L.P. ("ASOF II A (DE) Frontier Holdings 2", and together with ASOF Frontier AIV A1, ASOF Frontier AIV A2, ASOF Frontier AIV A3, ASOF Frontier AIV A4, ASOF Frontier AIV A5, ASOF Frontier AIV A6, ASOF Frontier AIV A7, ASOF Frontier AIV A8, ASOF Frontier AIV A9, ASOF Frontier AIV A10, and ASOF Frontier AIV A11, ASOF II Frontier Holdings 1, ASOF II Frontier Holdings 2, ASOF II Frontier Holdings 3, ASOF II Frontier Holdings 4, ASOF II Frontier Holdings 5, ASOF II Frontier Holdings 6, ASOF II Frontier Holdings 7 and ASOF II A (DE) Frontier Holdings 1, the "ASOF Funds"), (continued in next footnote)

F5 · ownership.nature: ASSF IV AIV B Holdings III, L.P. ("ASSF IV AIV B Holdings III"), ASSF IV AIV B, L.P. ("ASSF IV AIV B", and together with ASSF IV AIV B Holdings III, the "ASSF Funds"), ACOF Investment Management LLC ("ACOF Investment Management"), ASOF Investment Management LLC ("ASOF Investment Management"), ASSF Operating Manager IV, L.P. ("ASSF Operating Manager IV"), (continued in next footnote)

F6 · ownership.nature: Ares Management LLC, Ares Management Holdings L.P. ("Ares Management Holdings"), Ares Holdco LLC ("Ares Holdco"), Ares Management Corporation ("Ares Management"), Ares Management GP LLC ("Ares Management GP"), Ares Voting LLC ("Ares Voting") and Ares Partners Holdco LLC ("Ares Partners", and together with the ACOF Funds, the ASOF Funds, the ASSF Funds, ACOF Investment Management, ASOF Investment Management, ASSF Operating Manager IV, Ares Management LLC, Ares Management Holdings, Ares Holdco, Ares Management, Ares Management GP, and Ares Voting, the "Reporting Persons"). Due to the electronic system's limitation of 10 Reporting Persons per joint filing, this statement is being filed in five parts.

F7 · ownership.nature: The Reporting Persons collectively beneficially own, or may be deemed to beneficially own, in the aggregate 38,355,498 shares of Common Stock by reason of the direct or indirect beneficial ownership of such shares as follows: (i) ACOF VI Frontier AIV A1 owns 258,196 shares of Common Stock; (ii) ACOF VI Frontier AIV A2 owns 92,590 shares of Common Stock; (iii) ACOF VI Frontier AIV A3 owns 21,604 shares of Common Stock; (iv) ACOF VI Frontier AIV A4 owns 280,859 shares of Common Stock; (v) ACOF VI Frontier AIV A5 owns 308,635 shares of Common Stock; (vi) ACOF VI Frontier AIV A6 owns 172,837 shares of Common Stock; (vii) ACOF VI Frontier AIV A7 owns 312,782 shares of Common Stock; (viii) ACOF VI Frontier AIV A8 owns 314,191 shares of Common Stock; (ix) ACOF VI Frontier AIV A9 owns 295,057 shares of Common Stock; (x) ACOF VI Frontier AIV A10 owns 93,301 shares of Common Stock; (xi) ACOF VI Frontier AIV B1 owns 15,574,332 shares of Common Stock; (continued in next footnote)

F8 · ownership.nature: (xii) ASOF Frontier AIV A1 owns 105,592 shares of Common Stock; (xiii) ASOF Frontier AIV A2 owns 18,032 shares of Common Stock; (xiv) ASOF Frontier AIV A3 owns 830,837 shares of Common Stock; (xv) ASOF Frontier AIV A4 owns 281,844 shares of Common Stock; (xvi) ASOF Frontier AIV A5 owns 167,160 shares of Common Stock; (xvii) ASOF Frontier AIV A6 owns 292,124 shares of Common Stock; (xviii) ASOF Frontier AIV A7 owns 289,417 shares of Common Stock; (xix) ASOF Frontier AIV A8 owns 238,026 shares of Common Stock; (xx) ASOF Frontier AIV A9 owns 360,644 shares of Common Stock; (xxi) ASOF Frontier AIV A10 owns 259,665 shares of Common Stock; (xxii) ASOF Frontier AIV A11 owns 245,236 shares of Common Stock; (xxiii) ASOF Frontier AIV B1 owns 9,597,579 shares of Common Stock; (continued in next footnote)

F9 · ownership.nature: (xxiv) ASOF II Frontier Holdings 1 owns 1,646,837 shares of Common Stock, (xxv) ASOF II Frontier Holdings 2 owns 79,375 shares of Common Stock, (xxvi) ASOF II Frontier Holdings 3 owns 88,409 shares of Common Stock, (xxvii) ASOF II Frontier Holdings 4 owns 85,687 shares of Common Stock, (xxviii) ASOF II Frontier Holdings 5 owns 84,864 shares of Common Stock, (xxix) ASOF II Frontier Holdings 6 owns 89,934 shares of Common Stock, (xxx) ASOF II Frontier Holdings 7 owns 90,156 shares of Common Stock, (xxxi) ASOF II A (DE) Frontier Holdings 1 owns 394,502 shares of Common Stock; (xxxii) ASOF II A (DE) Frontier Holdings 2 owns 14,518 shares of Common Stock; (xxxiii) ASSF IV AIV B Holdings III owns 2,694,243 shares of Common Stock and (xxxiv) ASSF IV AIV B directly or indirectly owns 5,348,289 shares of Common Stock.

F10 · ownership.nature: Ares Partners is the sole member of each of Ares Voting and Ares Management GP, which are respectively the holders of the Class B and Class C common stock of Ares Management, which common stock allows them, collectively, to generally have the majority of the votes on any matter submitted to the stockholders of Ares Management if certain conditions are met. Ares Management is the sole member of Ares Holdco, which is the general partner of Ares Management Holdings, which is the sole member of Ares Management LLC, which is: (a) the sole member of ACOF Investment Management, which is the manager of the ACOF Funds, (b) the sole member of ASOF Investment Management, which is the manager of the ASOF Funds, and (c) the general partner of ASSF Operating Manager IV, which is the manager of the ASSF Funds.

F11 · ownership.nature: Ares Partners is managed by a board of managers, which is composed of Michael J Arougheti, Ryan Berry, R. Kipp deVeer, David B. Kaplan, Antony P. Ressler and Bennett Rosenthal (collectively, the "Board Members"). Mr. Ressler generally has veto authority over Board Members' decisions.

F12 · ownership.nature: Each of the Reporting Persons, and the Board Members, and the other directors, officers, partners, stockholders, members and managers of the Reporting Persons, expressly disclaims beneficial ownership of the Common Stock, except to the extent of any pecuniary interest therein, and this Form 4 shall not be deemed an admission that any such person or entity is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purposes.

SEC source: 0001104659-23-094979 · tm2324701-1_4seq1.xml · nonDerivative · entry 2

ARES MANAGEMENT LLC · CIK 0001259313 · 10% owner

ACOF VI Frontier AIV A1, L.P. · CIK 0001862494 · 10% owner

ACOF VI Frontier AIV A2, L.P. · CIK 0001862499 · 10% owner

ACOF VI Frontier AIV A3, L.P. · CIK 0001862534 · 10% owner

ACOF VI Frontier AIV A4, L.P. · CIK 0001862529 · 10% owner

ACOF VI Frontier AIV A5, L.P. · CIK 0001862526 · 10% owner

ACOF VI Frontier AIV A6, L.P. · CIK 0001862483 · 10% owner

ACOF VI Frontier AIV A7, L.P. · CIK 0001862482 · 10% owner

ACOF VI Frontier AIV A8, L.P. · CIK 0001862505 · 10% owner

ACOF VI Frontier AIV A9, L.P. · CIK 0001862533 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnotes

Disclosed balance after: 38,317,941

F1 · balance_after: This statement is being filed by ACOF VI Frontier AIV A1, L.P. ("ACOF VI Frontier AIV A1"), ACOF VI Frontier AIV A2, L.P. ("ACOF VI Frontier AIV A2"), ACOF VI Frontier AIV A3, L.P. ("ACOF VI Frontier AIV A3"), ACOF VI Frontier AIV A4, L.P. ("ACOF VI Frontier AIV A4"), ACOF VI Frontier AIV A5, L.P. ("ACOF VI Frontier AIV A5"), ACOF VI Frontier AIV A6, L.P. ("ACOF VI Frontier AIV A6"), ACOF VI Frontier AIV A7, L.P. ("ACOF VI Frontier AIV A7"), ACOF VI Frontier AIV A8, L.P. ("ACOF VI Frontier AIV A8"), ACOF VI Frontier AIV A9, L.P. ("ACOF VI Frontier AIV A9"), ACOF VI Frontier AIV A10, L.P. ("ACOF VI Frontier AIV A10"), and ACOF VI Frontier AIV B1, L.P. ("ACOF VI Frontier AIV B1", together with the foregoing entities, the "ACOF Funds"), (continued in next footnote)

F2 · balance_after: ASOF Frontier AIV A1, L.P. ("ASOF Frontier AIV A1"), ASOF Frontier AIV A2, L.P. ("ASOF Frontier AIV A2"), ASOF Frontier AIV A3, L.P. ("ASOF Frontier AIV A3"), ASOF Frontier AIV A4, L.P. ("ASOF Frontier AIV A4"), ASOF Frontier AIV A5, L.P. ("ASOF Frontier AIV A5"), ASOF Frontier AIV A6, L.P. ("ASOF Frontier AIV A6"), ASOF Frontier AIV A7, L.P. ("ASOF Frontier AIV A7"), ASOF Frontier AIV A8, L.P. ("ASOF Frontier AIV A8"), ASOF Frontier AIV A9, L.P. ("ASOF Frontier AIV A9"), ASOF Frontier AIV A10, L.P. ("ASOF Frontier AIV A10"), ASOF Frontier AIV A11, L.P. ("ASOF Frontier AIV A11"), ASOF Frontier AIV B1, L.P. ("ASOF Frontier AIV B1"), (continued in next footnote)

F3 · balance_after: ASOF II Frontier Holdings 1 L.P. ("ASOF II Frontier Holdings 1"), ASOF II Frontier Holdings 2 L.P. ("ASOF II Frontier Holdings 2"), ASOF II Frontier Holdings 3 L.P. ("ASOF II Frontier Holdings 3"), ASOF II Frontier Holdings 4 L.P. ("ASOF II Frontier Holdings 4"), ASOF II Frontier Holdings 5 L.P. ("ASOF II Frontier Holdings 5"), ASOF II Frontier Holdings 6 L.P. ("ASOF II Frontier Holdings 6"), (continued in next footnote)

F4 · balance_after: ASOF II Frontier Holdings 7 L.P. ("ASOF II Frontier Holdings 7"), ASOF II A (DE) Frontier Holdings 1 L.P. ("ASOF II A (DE) Frontier Holdings 1") and ASOF II A (DE) Frontier Holdings 2 L.P. ("ASOF II A (DE) Frontier Holdings 2", and together with ASOF Frontier AIV A1, ASOF Frontier AIV A2, ASOF Frontier AIV A3, ASOF Frontier AIV A4, ASOF Frontier AIV A5, ASOF Frontier AIV A6, ASOF Frontier AIV A7, ASOF Frontier AIV A8, ASOF Frontier AIV A9, ASOF Frontier AIV A10, and ASOF Frontier AIV A11, ASOF II Frontier Holdings 1, ASOF II Frontier Holdings 2, ASOF II Frontier Holdings 3, ASOF II Frontier Holdings 4, ASOF II Frontier Holdings 5, ASOF II Frontier Holdings 6, ASOF II Frontier Holdings 7 and ASOF II A (DE) Frontier Holdings 1, the "ASOF Funds"), (continued in next footnote)

F5 · balance_after: ASSF IV AIV B Holdings III, L.P. ("ASSF IV AIV B Holdings III"), ASSF IV AIV B, L.P. ("ASSF IV AIV B", and together with ASSF IV AIV B Holdings III, the "ASSF Funds"), ACOF Investment Management LLC ("ACOF Investment Management"), ASOF Investment Management LLC ("ASOF Investment Management"), ASSF Operating Manager IV, L.P. ("ASSF Operating Manager IV"), (continued in next footnote)

F6 · balance_after: Ares Management LLC, Ares Management Holdings L.P. ("Ares Management Holdings"), Ares Holdco LLC ("Ares Holdco"), Ares Management Corporation ("Ares Management"), Ares Management GP LLC ("Ares Management GP"), Ares Voting LLC ("Ares Voting") and Ares Partners Holdco LLC ("Ares Partners", and together with the ACOF Funds, the ASOF Funds, the ASSF Funds, ACOF Investment Management, ASOF Investment Management, ASSF Operating Manager IV, Ares Management LLC, Ares Management Holdings, Ares Holdco, Ares Management, Ares Management GP, and Ares Voting, the "Reporting Persons"). Due to the electronic system's limitation of 10 Reporting Persons per joint filing, this statement is being filed in five parts.

F7 · balance_after: The Reporting Persons collectively beneficially own, or may be deemed to beneficially own, in the aggregate 38,317,941 shares of Common Stock by reason of the direct or indirect beneficial ownership of such shares as follows: (i) ACOF VI Frontier AIV A1 owns 258,196 shares of Common Stock; (ii) ACOF VI Frontier AIV A2 owns 92,590 shares of Common Stock; (iii) ACOF VI Frontier AIV A3 owns 21,604 shares of Common Stock; (iv) ACOF VI Frontier AIV A4 owns 280,859 shares of Common Stock; (v) ACOF VI Frontier AIV A5 owns 308,635 shares of Common Stock; (vi) ACOF VI Frontier AIV A6 owns 172,837 shares of Common Stock; (vii) ACOF VI Frontier AIV A7 owns 312,782 shares of Common Stock; (viii) ACOF VI Frontier AIV A8 owns 314,191 shares of Common Stock; (ix) ACOF VI Frontier AIV A9 owns 295,057 shares of Common Stock; (x) ACOF VI Frontier AIV A10 owns 93,301 shares of Common Stock; (xi) ACOF VI Frontier AIV B1 owns 15,574,332 shares of Common Stock; (continued in next footnote)

F8 · balance_after: (xii) ASOF Frontier AIV A1 owns 105,592 shares of Common Stock; (xiii) ASOF Frontier AIV A2 owns 18,032 shares of Common Stock; (xiv) ASOF Frontier AIV A3 owns 830,837 shares of Common Stock; (xv) ASOF Frontier AIV A4 owns 281,844 shares of Common Stock; (xvi) ASOF Frontier AIV A5 owns 167,160 shares of Common Stock; (xvii) ASOF Frontier AIV A6 owns 292,124 shares of Common Stock; (xviii) ASOF Frontier AIV A7 owns 289,417 shares of Common Stock; (xix) ASOF Frontier AIV A8 owns 238,026 shares of Common Stock; (xx) ASOF Frontier AIV A9 owns 360,644 shares of Common Stock; (xxi) ASOF Frontier AIV A10 owns 259,665 shares of Common Stock; (xxii) ASOF Frontier AIV A11 owns 245,236 shares of Common Stock; (xxiii) ASOF Frontier AIV B1 owns 9,597,579 shares of Common Stock; (continued in next footnote)

F9 · balance_after: (xxiv) ASOF II Frontier Holdings 1 owns 1,622,811 shares of Common Stock, (xxv) ASOF II Frontier Holdings 2 owns 78,217 shares of Common Stock, (xxvi) ASOF II Frontier Holdings 3 owns 87,119 shares of Common Stock, (xxvii) ASOF II Frontier Holdings 4 owns 84,437 shares of Common Stock, (xxviii) ASOF II Frontier Holdings 5 owns 83,626 shares of Common Stock, (xxix) ASOF II Frontier Holdings 6 owns 88,622 shares of Common Stock, (xxx) ASOF II Frontier Holdings 7 owns 88,841 shares of Common Stock, (xxxi) ASOF II A (DE) Frontier Holdings 1 owns 388,746 shares of Common Stock; (xxxii) ASOF II A (DE) Frontier Holdings 2 owns 14,306 shares of Common Stock; (xxxiii) ASSF IV AIV B Holdings III owns 2,694,243 shares of Common Stock and (xxxiv) ASSF IV AIV B directly or indirectly owns 5,348,289 shares of Common Stock.

F10 · balance_after: Ares Partners is the sole member of each of Ares Voting and Ares Management GP, which are respectively the holders of the Class B and Class C common stock of Ares Management, which common stock allows them, collectively, to generally have the majority of the votes on any matter submitted to the stockholders of Ares Management if certain conditions are met. Ares Management is the sole member of Ares Holdco, which is the general partner of Ares Management Holdings, which is the sole member of Ares Management LLC, which is: (a) the sole member of ACOF Investment Management, which is the manager of the ACOF Funds, (b) the sole member of ASOF Investment Management, which is the manager of the ASOF Funds, and (c) the general partner of ASSF Operating Manager IV, which is the manager of the ASSF Funds.

F11 · balance_after: Ares Partners is managed by a board of managers, which is composed of Michael J Arougheti, Ryan Berry, R. Kipp deVeer, David B. Kaplan, Antony P. Ressler and Bennett Rosenthal (collectively, the "Board Members"). Mr. Ressler generally has veto authority over Board Members' decisions.

F12 · balance_after: Each of the Reporting Persons, and the Board Members, and the other directors, officers, partners, stockholders, members and managers of the Reporting Persons, expressly disclaims beneficial ownership of the Common Stock, except to the extent of any pecuniary interest therein, and this Form 4 shall not be deemed an admission that any such person or entity is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purposes.

F1 · ownership.nature: This statement is being filed by ACOF VI Frontier AIV A1, L.P. ("ACOF VI Frontier AIV A1"), ACOF VI Frontier AIV A2, L.P. ("ACOF VI Frontier AIV A2"), ACOF VI Frontier AIV A3, L.P. ("ACOF VI Frontier AIV A3"), ACOF VI Frontier AIV A4, L.P. ("ACOF VI Frontier AIV A4"), ACOF VI Frontier AIV A5, L.P. ("ACOF VI Frontier AIV A5"), ACOF VI Frontier AIV A6, L.P. ("ACOF VI Frontier AIV A6"), ACOF VI Frontier AIV A7, L.P. ("ACOF VI Frontier AIV A7"), ACOF VI Frontier AIV A8, L.P. ("ACOF VI Frontier AIV A8"), ACOF VI Frontier AIV A9, L.P. ("ACOF VI Frontier AIV A9"), ACOF VI Frontier AIV A10, L.P. ("ACOF VI Frontier AIV A10"), and ACOF VI Frontier AIV B1, L.P. ("ACOF VI Frontier AIV B1", together with the foregoing entities, the "ACOF Funds"), (continued in next footnote)

F2 · ownership.nature: ASOF Frontier AIV A1, L.P. ("ASOF Frontier AIV A1"), ASOF Frontier AIV A2, L.P. ("ASOF Frontier AIV A2"), ASOF Frontier AIV A3, L.P. ("ASOF Frontier AIV A3"), ASOF Frontier AIV A4, L.P. ("ASOF Frontier AIV A4"), ASOF Frontier AIV A5, L.P. ("ASOF Frontier AIV A5"), ASOF Frontier AIV A6, L.P. ("ASOF Frontier AIV A6"), ASOF Frontier AIV A7, L.P. ("ASOF Frontier AIV A7"), ASOF Frontier AIV A8, L.P. ("ASOF Frontier AIV A8"), ASOF Frontier AIV A9, L.P. ("ASOF Frontier AIV A9"), ASOF Frontier AIV A10, L.P. ("ASOF Frontier AIV A10"), ASOF Frontier AIV A11, L.P. ("ASOF Frontier AIV A11"), ASOF Frontier AIV B1, L.P. ("ASOF Frontier AIV B1"), (continued in next footnote)

F3 · ownership.nature: ASOF II Frontier Holdings 1 L.P. ("ASOF II Frontier Holdings 1"), ASOF II Frontier Holdings 2 L.P. ("ASOF II Frontier Holdings 2"), ASOF II Frontier Holdings 3 L.P. ("ASOF II Frontier Holdings 3"), ASOF II Frontier Holdings 4 L.P. ("ASOF II Frontier Holdings 4"), ASOF II Frontier Holdings 5 L.P. ("ASOF II Frontier Holdings 5"), ASOF II Frontier Holdings 6 L.P. ("ASOF II Frontier Holdings 6"), (continued in next footnote)

F4 · ownership.nature: ASOF II Frontier Holdings 7 L.P. ("ASOF II Frontier Holdings 7"), ASOF II A (DE) Frontier Holdings 1 L.P. ("ASOF II A (DE) Frontier Holdings 1") and ASOF II A (DE) Frontier Holdings 2 L.P. ("ASOF II A (DE) Frontier Holdings 2", and together with ASOF Frontier AIV A1, ASOF Frontier AIV A2, ASOF Frontier AIV A3, ASOF Frontier AIV A4, ASOF Frontier AIV A5, ASOF Frontier AIV A6, ASOF Frontier AIV A7, ASOF Frontier AIV A8, ASOF Frontier AIV A9, ASOF Frontier AIV A10, and ASOF Frontier AIV A11, ASOF II Frontier Holdings 1, ASOF II Frontier Holdings 2, ASOF II Frontier Holdings 3, ASOF II Frontier Holdings 4, ASOF II Frontier Holdings 5, ASOF II Frontier Holdings 6, ASOF II Frontier Holdings 7 and ASOF II A (DE) Frontier Holdings 1, the "ASOF Funds"), (continued in next footnote)

F5 · ownership.nature: ASSF IV AIV B Holdings III, L.P. ("ASSF IV AIV B Holdings III"), ASSF IV AIV B, L.P. ("ASSF IV AIV B", and together with ASSF IV AIV B Holdings III, the "ASSF Funds"), ACOF Investment Management LLC ("ACOF Investment Management"), ASOF Investment Management LLC ("ASOF Investment Management"), ASSF Operating Manager IV, L.P. ("ASSF Operating Manager IV"), (continued in next footnote)

F6 · ownership.nature: Ares Management LLC, Ares Management Holdings L.P. ("Ares Management Holdings"), Ares Holdco LLC ("Ares Holdco"), Ares Management Corporation ("Ares Management"), Ares Management GP LLC ("Ares Management GP"), Ares Voting LLC ("Ares Voting") and Ares Partners Holdco LLC ("Ares Partners", and together with the ACOF Funds, the ASOF Funds, the ASSF Funds, ACOF Investment Management, ASOF Investment Management, ASSF Operating Manager IV, Ares Management LLC, Ares Management Holdings, Ares Holdco, Ares Management, Ares Management GP, and Ares Voting, the "Reporting Persons"). Due to the electronic system's limitation of 10 Reporting Persons per joint filing, this statement is being filed in five parts.

F7 · ownership.nature: The Reporting Persons collectively beneficially own, or may be deemed to beneficially own, in the aggregate 38,317,941 shares of Common Stock by reason of the direct or indirect beneficial ownership of such shares as follows: (i) ACOF VI Frontier AIV A1 owns 258,196 shares of Common Stock; (ii) ACOF VI Frontier AIV A2 owns 92,590 shares of Common Stock; (iii) ACOF VI Frontier AIV A3 owns 21,604 shares of Common Stock; (iv) ACOF VI Frontier AIV A4 owns 280,859 shares of Common Stock; (v) ACOF VI Frontier AIV A5 owns 308,635 shares of Common Stock; (vi) ACOF VI Frontier AIV A6 owns 172,837 shares of Common Stock; (vii) ACOF VI Frontier AIV A7 owns 312,782 shares of Common Stock; (viii) ACOF VI Frontier AIV A8 owns 314,191 shares of Common Stock; (ix) ACOF VI Frontier AIV A9 owns 295,057 shares of Common Stock; (x) ACOF VI Frontier AIV A10 owns 93,301 shares of Common Stock; (xi) ACOF VI Frontier AIV B1 owns 15,574,332 shares of Common Stock; (continued in next footnote)

F8 · ownership.nature: (xii) ASOF Frontier AIV A1 owns 105,592 shares of Common Stock; (xiii) ASOF Frontier AIV A2 owns 18,032 shares of Common Stock; (xiv) ASOF Frontier AIV A3 owns 830,837 shares of Common Stock; (xv) ASOF Frontier AIV A4 owns 281,844 shares of Common Stock; (xvi) ASOF Frontier AIV A5 owns 167,160 shares of Common Stock; (xvii) ASOF Frontier AIV A6 owns 292,124 shares of Common Stock; (xviii) ASOF Frontier AIV A7 owns 289,417 shares of Common Stock; (xix) ASOF Frontier AIV A8 owns 238,026 shares of Common Stock; (xx) ASOF Frontier AIV A9 owns 360,644 shares of Common Stock; (xxi) ASOF Frontier AIV A10 owns 259,665 shares of Common Stock; (xxii) ASOF Frontier AIV A11 owns 245,236 shares of Common Stock; (xxiii) ASOF Frontier AIV B1 owns 9,597,579 shares of Common Stock; (continued in next footnote)

F9 · ownership.nature: (xxiv) ASOF II Frontier Holdings 1 owns 1,622,811 shares of Common Stock, (xxv) ASOF II Frontier Holdings 2 owns 78,217 shares of Common Stock, (xxvi) ASOF II Frontier Holdings 3 owns 87,119 shares of Common Stock, (xxvii) ASOF II Frontier Holdings 4 owns 84,437 shares of Common Stock, (xxviii) ASOF II Frontier Holdings 5 owns 83,626 shares of Common Stock, (xxix) ASOF II Frontier Holdings 6 owns 88,622 shares of Common Stock, (xxx) ASOF II Frontier Holdings 7 owns 88,841 shares of Common Stock, (xxxi) ASOF II A (DE) Frontier Holdings 1 owns 388,746 shares of Common Stock; (xxxii) ASOF II A (DE) Frontier Holdings 2 owns 14,306 shares of Common Stock; (xxxiii) ASSF IV AIV B Holdings III owns 2,694,243 shares of Common Stock and (xxxiv) ASSF IV AIV B directly or indirectly owns 5,348,289 shares of Common Stock.

F10 · ownership.nature: Ares Partners is the sole member of each of Ares Voting and Ares Management GP, which are respectively the holders of the Class B and Class C common stock of Ares Management, which common stock allows them, collectively, to generally have the majority of the votes on any matter submitted to the stockholders of Ares Management if certain conditions are met. Ares Management is the sole member of Ares Holdco, which is the general partner of Ares Management Holdings, which is the sole member of Ares Management LLC, which is: (a) the sole member of ACOF Investment Management, which is the manager of the ACOF Funds, (b) the sole member of ASOF Investment Management, which is the manager of the ASOF Funds, and (c) the general partner of ASSF Operating Manager IV, which is the manager of the ASSF Funds.

F11 · ownership.nature: Ares Partners is managed by a board of managers, which is composed of Michael J Arougheti, Ryan Berry, R. Kipp deVeer, David B. Kaplan, Antony P. Ressler and Bennett Rosenthal (collectively, the "Board Members"). Mr. Ressler generally has veto authority over Board Members' decisions.

F12 · ownership.nature: Each of the Reporting Persons, and the Board Members, and the other directors, officers, partners, stockholders, members and managers of the Reporting Persons, expressly disclaims beneficial ownership of the Common Stock, except to the extent of any pecuniary interest therein, and this Form 4 shall not be deemed an admission that any such person or entity is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purposes.

SEC source: 0001104659-23-094979 · tm2324701-1_4seq1.xml · nonDerivative · entry 1

ARES MANAGEMENT LLC · CIK 0001259313 · 10% owner

ACOF VI Frontier AIV A1, L.P. · CIK 0001862494 · 10% owner

ACOF VI Frontier AIV A2, L.P. · CIK 0001862499 · 10% owner

ACOF VI Frontier AIV A3, L.P. · CIK 0001862534 · 10% owner

ACOF VI Frontier AIV A4, L.P. · CIK 0001862529 · 10% owner

ACOF VI Frontier AIV A5, L.P. · CIK 0001862526 · 10% owner

ACOF VI Frontier AIV A6, L.P. · CIK 0001862483 · 10% owner

ACOF VI Frontier AIV A7, L.P. · CIK 0001862482 · 10% owner

ACOF VI Frontier AIV A8, L.P. · CIK 0001862505 · 10% owner

ACOF VI Frontier AIV A9, L.P. · CIK 0001862533 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnotes

Disclosed balance after: 38,284,666

F1 · balance_after: This statement is being filed by ACOF VI Frontier AIV A1, L.P. ("ACOF VI Frontier AIV A1"), ACOF VI Frontier AIV A2, L.P. ("ACOF VI Frontier AIV A2"), ACOF VI Frontier AIV A3, L.P. ("ACOF VI Frontier AIV A3"), ACOF VI Frontier AIV A4, L.P. ("ACOF VI Frontier AIV A4"), ACOF VI Frontier AIV A5, L.P. ("ACOF VI Frontier AIV A5"), ACOF VI Frontier AIV A6, L.P. ("ACOF VI Frontier AIV A6"), ACOF VI Frontier AIV A7, L.P. ("ACOF VI Frontier AIV A7"), ACOF VI Frontier AIV A8, L.P. ("ACOF VI Frontier AIV A8"), ACOF VI Frontier AIV A9, L.P. ("ACOF VI Frontier AIV A9"), ACOF VI Frontier AIV A10, L.P. ("ACOF VI Frontier AIV A10"), and ACOF VI Frontier AIV B1, L.P. ("ACOF VI Frontier AIV B1", together with the foregoing entities, the "ACOF Funds"), (continued in next footnote)

F2 · balance_after: ASOF Frontier AIV A1, L.P. ("ASOF Frontier AIV A1"), ASOF Frontier AIV A2, L.P. ("ASOF Frontier AIV A2"), ASOF Frontier AIV A3, L.P. ("ASOF Frontier AIV A3"), ASOF Frontier AIV A4, L.P. ("ASOF Frontier AIV A4"), ASOF Frontier AIV A5, L.P. ("ASOF Frontier AIV A5"), ASOF Frontier AIV A6, L.P. ("ASOF Frontier AIV A6"), ASOF Frontier AIV A7, L.P. ("ASOF Frontier AIV A7"), ASOF Frontier AIV A8, L.P. ("ASOF Frontier AIV A8"), ASOF Frontier AIV A9, L.P. ("ASOF Frontier AIV A9"), ASOF Frontier AIV A10, L.P. ("ASOF Frontier AIV A10"), ASOF Frontier AIV A11, L.P. ("ASOF Frontier AIV A11"), ASOF Frontier AIV B1, L.P. ("ASOF Frontier AIV B1"), (continued in next footnote)

F3 · balance_after: ASOF II Frontier Holdings 1 L.P. ("ASOF II Frontier Holdings 1"), ASOF II Frontier Holdings 2 L.P. ("ASOF II Frontier Holdings 2"), ASOF II Frontier Holdings 3 L.P. ("ASOF II Frontier Holdings 3"), ASOF II Frontier Holdings 4 L.P. ("ASOF II Frontier Holdings 4"), ASOF II Frontier Holdings 5 L.P. ("ASOF II Frontier Holdings 5"), ASOF II Frontier Holdings 6 L.P. ("ASOF II Frontier Holdings 6"), (continued in next footnote)

F4 · balance_after: ASOF II Frontier Holdings 7 L.P. ("ASOF II Frontier Holdings 7"), ASOF II A (DE) Frontier Holdings 1 L.P. ("ASOF II A (DE) Frontier Holdings 1") and ASOF II A (DE) Frontier Holdings 2 L.P. ("ASOF II A (DE) Frontier Holdings 2", and together with ASOF Frontier AIV A1, ASOF Frontier AIV A2, ASOF Frontier AIV A3, ASOF Frontier AIV A4, ASOF Frontier AIV A5, ASOF Frontier AIV A6, ASOF Frontier AIV A7, ASOF Frontier AIV A8, ASOF Frontier AIV A9, ASOF Frontier AIV A10, and ASOF Frontier AIV A11, ASOF II Frontier Holdings 1, ASOF II Frontier Holdings 2, ASOF II Frontier Holdings 3, ASOF II Frontier Holdings 4, ASOF II Frontier Holdings 5, ASOF II Frontier Holdings 6, ASOF II Frontier Holdings 7 and ASOF II A (DE) Frontier Holdings 1, the "ASOF Funds"), (continued in next footnote)

F5 · balance_after: ASSF IV AIV B Holdings III, L.P. ("ASSF IV AIV B Holdings III"), ASSF IV AIV B, L.P. ("ASSF IV AIV B", and together with ASSF IV AIV B Holdings III, the "ASSF Funds"), ACOF Investment Management LLC ("ACOF Investment Management"), ASOF Investment Management LLC ("ASOF Investment Management"), ASSF Operating Manager IV, L.P. ("ASSF Operating Manager IV"), (continued in next footnote)

F6 · balance_after: Ares Management LLC, Ares Management Holdings L.P. ("Ares Management Holdings"), Ares Holdco LLC ("Ares Holdco"), Ares Management Corporation ("Ares Management"), Ares Management GP LLC ("Ares Management GP"), Ares Voting LLC ("Ares Voting") and Ares Partners Holdco LLC ("Ares Partners", and together with the ACOF Funds, the ASOF Funds, the ASSF Funds, ACOF Investment Management, ASOF Investment Management, ASSF Operating Manager IV, Ares Management LLC, Ares Management Holdings, Ares Holdco, Ares Management, Ares Management GP, and Ares Voting, the "Reporting Persons"). Due to the electronic system's limitation of 10 Reporting Persons per joint filing, this statement is being filed in five parts.

F7 · balance_after: The Reporting Persons collectively beneficially own, or may be deemed to beneficially own, in the aggregate 38,317,941 shares of Common Stock by reason of the direct or indirect beneficial ownership of such shares as follows: (i) ACOF VI Frontier AIV A1 owns 258,196 shares of Common Stock; (ii) ACOF VI Frontier AIV A2 owns 92,590 shares of Common Stock; (iii) ACOF VI Frontier AIV A3 owns 21,604 shares of Common Stock; (iv) ACOF VI Frontier AIV A4 owns 280,859 shares of Common Stock; (v) ACOF VI Frontier AIV A5 owns 308,635 shares of Common Stock; (vi) ACOF VI Frontier AIV A6 owns 172,837 shares of Common Stock; (vii) ACOF VI Frontier AIV A7 owns 312,782 shares of Common Stock; (viii) ACOF VI Frontier AIV A8 owns 314,191 shares of Common Stock; (ix) ACOF VI Frontier AIV A9 owns 295,057 shares of Common Stock; (x) ACOF VI Frontier AIV A10 owns 93,301 shares of Common Stock; (xi) ACOF VI Frontier AIV B1 owns 15,574,332 shares of Common Stock; (continued in next footnote)

F8 · balance_after: (xii) ASOF Frontier AIV A1 owns 105,592 shares of Common Stock; (xiii) ASOF Frontier AIV A2 owns 18,032 shares of Common Stock; (xiv) ASOF Frontier AIV A3 owns 830,837 shares of Common Stock; (xv) ASOF Frontier AIV A4 owns 281,844 shares of Common Stock; (xvi) ASOF Frontier AIV A5 owns 167,160 shares of Common Stock; (xvii) ASOF Frontier AIV A6 owns 292,124 shares of Common Stock; (xviii) ASOF Frontier AIV A7 owns 289,417 shares of Common Stock; (xix) ASOF Frontier AIV A8 owns 238,026 shares of Common Stock; (xx) ASOF Frontier AIV A9 owns 360,644 shares of Common Stock; (xxi) ASOF Frontier AIV A10 owns 259,665 shares of Common Stock; (xxii) ASOF Frontier AIV A11 owns 245,236 shares of Common Stock; (xxiii) ASOF Frontier AIV B1 owns 9,597,579 shares of Common Stock; (continued in next footnote)

F9 · balance_after: (xxiv) ASOF II Frontier Holdings 1 owns 1,622,811 shares of Common Stock, (xxv) ASOF II Frontier Holdings 2 owns 78,217 shares of Common Stock, (xxvi) ASOF II Frontier Holdings 3 owns 87,119 shares of Common Stock, (xxvii) ASOF II Frontier Holdings 4 owns 84,437 shares of Common Stock, (xxviii) ASOF II Frontier Holdings 5 owns 83,626 shares of Common Stock, (xxix) ASOF II Frontier Holdings 6 owns 88,622 shares of Common Stock, (xxx) ASOF II Frontier Holdings 7 owns 88,841 shares of Common Stock, (xxxi) ASOF II A (DE) Frontier Holdings 1 owns 388,746 shares of Common Stock; (xxxii) ASOF II A (DE) Frontier Holdings 2 owns 14,306 shares of Common Stock; (xxxiii) ASSF IV AIV B Holdings III owns 2,694,243 shares of Common Stock and (xxxiv) ASSF IV AIV B directly or indirectly owns 5,348,289 shares of Common Stock.

F10 · balance_after: Ares Partners is the sole member of each of Ares Voting and Ares Management GP, which are respectively the holders of the Class B and Class C common stock of Ares Management, which common stock allows them, collectively, to generally have the majority of the votes on any matter submitted to the stockholders of Ares Management if certain conditions are met. Ares Management is the sole member of Ares Holdco, which is the general partner of Ares Management Holdings, which is the sole member of Ares Management LLC, which is: (a) the sole member of ACOF Investment Management, which is the manager of the ACOF Funds, (b) the sole member of ASOF Investment Management, which is the manager of the ASOF Funds, and (c) the general partner of ASSF Operating Manager IV, which is the manager of the ASSF Funds.

F11 · balance_after: Ares Partners is managed by a board of managers, which is composed of Michael J Arougheti, Ryan Berry, R. Kipp deVeer, David B. Kaplan, Antony P. Ressler and Bennett Rosenthal (collectively, the "Board Members"). Mr. Ressler generally has veto authority over Board Members' decisions.

F12 · balance_after: Each of the Reporting Persons, and the Board Members, and the other directors, officers, partners, stockholders, members and managers of the Reporting Persons, expressly disclaims beneficial ownership of the Common Stock, except to the extent of any pecuniary interest therein, and this Form 4 shall not be deemed an admission that any such person or entity is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purposes.

F1 · ownership.nature: This statement is being filed by ACOF VI Frontier AIV A1, L.P. ("ACOF VI Frontier AIV A1"), ACOF VI Frontier AIV A2, L.P. ("ACOF VI Frontier AIV A2"), ACOF VI Frontier AIV A3, L.P. ("ACOF VI Frontier AIV A3"), ACOF VI Frontier AIV A4, L.P. ("ACOF VI Frontier AIV A4"), ACOF VI Frontier AIV A5, L.P. ("ACOF VI Frontier AIV A5"), ACOF VI Frontier AIV A6, L.P. ("ACOF VI Frontier AIV A6"), ACOF VI Frontier AIV A7, L.P. ("ACOF VI Frontier AIV A7"), ACOF VI Frontier AIV A8, L.P. ("ACOF VI Frontier AIV A8"), ACOF VI Frontier AIV A9, L.P. ("ACOF VI Frontier AIV A9"), ACOF VI Frontier AIV A10, L.P. ("ACOF VI Frontier AIV A10"), and ACOF VI Frontier AIV B1, L.P. ("ACOF VI Frontier AIV B1", together with the foregoing entities, the "ACOF Funds"), (continued in next footnote)

F2 · ownership.nature: ASOF Frontier AIV A1, L.P. ("ASOF Frontier AIV A1"), ASOF Frontier AIV A2, L.P. ("ASOF Frontier AIV A2"), ASOF Frontier AIV A3, L.P. ("ASOF Frontier AIV A3"), ASOF Frontier AIV A4, L.P. ("ASOF Frontier AIV A4"), ASOF Frontier AIV A5, L.P. ("ASOF Frontier AIV A5"), ASOF Frontier AIV A6, L.P. ("ASOF Frontier AIV A6"), ASOF Frontier AIV A7, L.P. ("ASOF Frontier AIV A7"), ASOF Frontier AIV A8, L.P. ("ASOF Frontier AIV A8"), ASOF Frontier AIV A9, L.P. ("ASOF Frontier AIV A9"), ASOF Frontier AIV A10, L.P. ("ASOF Frontier AIV A10"), ASOF Frontier AIV A11, L.P. ("ASOF Frontier AIV A11"), ASOF Frontier AIV B1, L.P. ("ASOF Frontier AIV B1"), (continued in next footnote)

F3 · ownership.nature: ASOF II Frontier Holdings 1 L.P. ("ASOF II Frontier Holdings 1"), ASOF II Frontier Holdings 2 L.P. ("ASOF II Frontier Holdings 2"), ASOF II Frontier Holdings 3 L.P. ("ASOF II Frontier Holdings 3"), ASOF II Frontier Holdings 4 L.P. ("ASOF II Frontier Holdings 4"), ASOF II Frontier Holdings 5 L.P. ("ASOF II Frontier Holdings 5"), ASOF II Frontier Holdings 6 L.P. ("ASOF II Frontier Holdings 6"), (continued in next footnote)

F4 · ownership.nature: ASOF II Frontier Holdings 7 L.P. ("ASOF II Frontier Holdings 7"), ASOF II A (DE) Frontier Holdings 1 L.P. ("ASOF II A (DE) Frontier Holdings 1") and ASOF II A (DE) Frontier Holdings 2 L.P. ("ASOF II A (DE) Frontier Holdings 2", and together with ASOF Frontier AIV A1, ASOF Frontier AIV A2, ASOF Frontier AIV A3, ASOF Frontier AIV A4, ASOF Frontier AIV A5, ASOF Frontier AIV A6, ASOF Frontier AIV A7, ASOF Frontier AIV A8, ASOF Frontier AIV A9, ASOF Frontier AIV A10, and ASOF Frontier AIV A11, ASOF II Frontier Holdings 1, ASOF II Frontier Holdings 2, ASOF II Frontier Holdings 3, ASOF II Frontier Holdings 4, ASOF II Frontier Holdings 5, ASOF II Frontier Holdings 6, ASOF II Frontier Holdings 7 and ASOF II A (DE) Frontier Holdings 1, the "ASOF Funds"), (continued in next footnote)

F5 · ownership.nature: ASSF IV AIV B Holdings III, L.P. ("ASSF IV AIV B Holdings III"), ASSF IV AIV B, L.P. ("ASSF IV AIV B", and together with ASSF IV AIV B Holdings III, the "ASSF Funds"), ACOF Investment Management LLC ("ACOF Investment Management"), ASOF Investment Management LLC ("ASOF Investment Management"), ASSF Operating Manager IV, L.P. ("ASSF Operating Manager IV"), (continued in next footnote)

F6 · ownership.nature: Ares Management LLC, Ares Management Holdings L.P. ("Ares Management Holdings"), Ares Holdco LLC ("Ares Holdco"), Ares Management Corporation ("Ares Management"), Ares Management GP LLC ("Ares Management GP"), Ares Voting LLC ("Ares Voting") and Ares Partners Holdco LLC ("Ares Partners", and together with the ACOF Funds, the ASOF Funds, the ASSF Funds, ACOF Investment Management, ASOF Investment Management, ASSF Operating Manager IV, Ares Management LLC, Ares Management Holdings, Ares Holdco, Ares Management, Ares Management GP, and Ares Voting, the "Reporting Persons"). Due to the electronic system's limitation of 10 Reporting Persons per joint filing, this statement is being filed in five parts.

F7 · ownership.nature: The Reporting Persons collectively beneficially own, or may be deemed to beneficially own, in the aggregate 38,317,941 shares of Common Stock by reason of the direct or indirect beneficial ownership of such shares as follows: (i) ACOF VI Frontier AIV A1 owns 258,196 shares of Common Stock; (ii) ACOF VI Frontier AIV A2 owns 92,590 shares of Common Stock; (iii) ACOF VI Frontier AIV A3 owns 21,604 shares of Common Stock; (iv) ACOF VI Frontier AIV A4 owns 280,859 shares of Common Stock; (v) ACOF VI Frontier AIV A5 owns 308,635 shares of Common Stock; (vi) ACOF VI Frontier AIV A6 owns 172,837 shares of Common Stock; (vii) ACOF VI Frontier AIV A7 owns 312,782 shares of Common Stock; (viii) ACOF VI Frontier AIV A8 owns 314,191 shares of Common Stock; (ix) ACOF VI Frontier AIV A9 owns 295,057 shares of Common Stock; (x) ACOF VI Frontier AIV A10 owns 93,301 shares of Common Stock; (xi) ACOF VI Frontier AIV B1 owns 15,574,332 shares of Common Stock; (continued in next footnote)

F8 · ownership.nature: (xii) ASOF Frontier AIV A1 owns 105,592 shares of Common Stock; (xiii) ASOF Frontier AIV A2 owns 18,032 shares of Common Stock; (xiv) ASOF Frontier AIV A3 owns 830,837 shares of Common Stock; (xv) ASOF Frontier AIV A4 owns 281,844 shares of Common Stock; (xvi) ASOF Frontier AIV A5 owns 167,160 shares of Common Stock; (xvii) ASOF Frontier AIV A6 owns 292,124 shares of Common Stock; (xviii) ASOF Frontier AIV A7 owns 289,417 shares of Common Stock; (xix) ASOF Frontier AIV A8 owns 238,026 shares of Common Stock; (xx) ASOF Frontier AIV A9 owns 360,644 shares of Common Stock; (xxi) ASOF Frontier AIV A10 owns 259,665 shares of Common Stock; (xxii) ASOF Frontier AIV A11 owns 245,236 shares of Common Stock; (xxiii) ASOF Frontier AIV B1 owns 9,597,579 shares of Common Stock; (continued in next footnote)

F9 · ownership.nature: (xxiv) ASOF II Frontier Holdings 1 owns 1,622,811 shares of Common Stock, (xxv) ASOF II Frontier Holdings 2 owns 78,217 shares of Common Stock, (xxvi) ASOF II Frontier Holdings 3 owns 87,119 shares of Common Stock, (xxvii) ASOF II Frontier Holdings 4 owns 84,437 shares of Common Stock, (xxviii) ASOF II Frontier Holdings 5 owns 83,626 shares of Common Stock, (xxix) ASOF II Frontier Holdings 6 owns 88,622 shares of Common Stock, (xxx) ASOF II Frontier Holdings 7 owns 88,841 shares of Common Stock, (xxxi) ASOF II A (DE) Frontier Holdings 1 owns 388,746 shares of Common Stock; (xxxii) ASOF II A (DE) Frontier Holdings 2 owns 14,306 shares of Common Stock; (xxxiii) ASSF IV AIV B Holdings III owns 2,694,243 shares of Common Stock and (xxxiv) ASSF IV AIV B directly or indirectly owns 5,348,289 shares of Common Stock.

F10 · ownership.nature: Ares Partners is the sole member of each of Ares Voting and Ares Management GP, which are respectively the holders of the Class B and Class C common stock of Ares Management, which common stock allows them, collectively, to generally have the majority of the votes on any matter submitted to the stockholders of Ares Management if certain conditions are met. Ares Management is the sole member of Ares Holdco, which is the general partner of Ares Management Holdings, which is the sole member of Ares Management LLC, which is: (a) the sole member of ACOF Investment Management, which is the manager of the ACOF Funds, (b) the sole member of ASOF Investment Management, which is the manager of the ASOF Funds, and (c) the general partner of ASSF Operating Manager IV, which is the manager of the ASSF Funds.

F11 · ownership.nature: Ares Partners is managed by a board of managers, which is composed of Michael J Arougheti, Ryan Berry, R. Kipp deVeer, David B. Kaplan, Antony P. Ressler and Bennett Rosenthal (collectively, the "Board Members"). Mr. Ressler generally has veto authority over Board Members' decisions.

F12 · ownership.nature: Each of the Reporting Persons, and the Board Members, and the other directors, officers, partners, stockholders, members and managers of the Reporting Persons, expressly disclaims beneficial ownership of the Common Stock, except to the extent of any pecuniary interest therein, and this Form 4 shall not be deemed an admission that any such person or entity is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purposes.

SEC source: 0001104659-23-057128 · tm2314962-1_4seq1.xml · nonDerivative · entry 2

ARES MANAGEMENT LLC · CIK 0001259313 · 10% owner

ACOF VI Frontier AIV A1, L.P. · CIK 0001862494 · 10% owner

ACOF VI Frontier AIV A2, L.P. · CIK 0001862499 · 10% owner

ACOF VI Frontier AIV A3, L.P. · CIK 0001862534 · 10% owner

ACOF VI Frontier AIV A4, L.P. · CIK 0001862529 · 10% owner

ACOF VI Frontier AIV A5, L.P. · CIK 0001862526 · 10% owner

ACOF VI Frontier AIV A6, L.P. · CIK 0001862483 · 10% owner

ACOF VI Frontier AIV A7, L.P. · CIK 0001862482 · 10% owner

ACOF VI Frontier AIV A8, L.P. · CIK 0001862505 · 10% owner

ACOF VI Frontier AIV A9, L.P. · CIK 0001862533 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnotes

Disclosed balance after: 38,105,498

F1 · balance_after: This statement is being filed by ACOF VI Frontier AIV A1, L.P. ("ACOF VI Frontier AIV A1"), ACOF VI Frontier AIV A2, L.P. ("ACOF VI Frontier AIV A2"), ACOF VI Frontier AIV A3, L.P. ("ACOF VI Frontier AIV A3"), ACOF VI Frontier AIV A4, L.P. ("ACOF VI Frontier AIV A4"), ACOF VI Frontier AIV A5, L.P. ("ACOF VI Frontier AIV A5"), ACOF VI Frontier AIV A6, L.P. ("ACOF VI Frontier AIV A6"), ACOF VI Frontier AIV A7, L.P. ("ACOF VI Frontier AIV A7"), ACOF VI Frontier AIV A8, L.P. ("ACOF VI Frontier AIV A8"), ACOF VI Frontier AIV A9, L.P. ("ACOF VI Frontier AIV A9"), ACOF VI Frontier AIV A10, L.P. ("ACOF VI Frontier AIV A10"), and ACOF VI Frontier AIV B1, L.P. ("ACOF VI Frontier AIV B1", together with the foregoing entities, the "ACOF Funds"), (continued in next footnote)

F2 · balance_after: ASOF Frontier AIV A1, L.P. ("ASOF Frontier AIV A1"), ASOF Frontier AIV A2, L.P. ("ASOF Frontier AIV A2"), ASOF Frontier AIV A3, L.P. ("ASOF Frontier AIV A3"), ASOF Frontier AIV A4, L.P. ("ASOF Frontier AIV A4"), ASOF Frontier AIV A5, L.P. ("ASOF Frontier AIV A5"), ASOF Frontier AIV A6, L.P. ("ASOF Frontier AIV A6"), ASOF Frontier AIV A7, L.P. ("ASOF Frontier AIV A7"), ASOF Frontier AIV A8, L.P. ("ASOF Frontier AIV A8"), ASOF Frontier AIV A9, L.P. ("ASOF Frontier AIV A9"), ASOF Frontier AIV A10, L.P. ("ASOF Frontier AIV A10"), ASOF Frontier AIV A11, L.P. ("ASOF Frontier AIV A11"), ASOF Frontier AIV B1, L.P. ("ASOF Frontier AIV B1"), (continued in next footnote)

F3 · balance_after: ASOF II Frontier Holdings 1 L.P. ("ASOF II Frontier Holdings 1"), ASOF II Frontier Holdings 2 L.P. ("ASOF II Frontier Holdings 2"), ASOF II Frontier Holdings 3 L.P. ("ASOF II Frontier Holdings 3"), ASOF II Frontier Holdings 4 L.P. ("ASOF II Frontier Holdings 4"), ASOF II Frontier Holdings 5 L.P. ("ASOF II Frontier Holdings 5"), ASOF II Frontier Holdings 6 L.P. ("ASOF II Frontier Holdings 6"), (continued in next footnote)

F4 · balance_after: ASOF II Frontier Holdings 7 L.P. ("ASOF II Frontier Holdings 7"), ASOF II A (DE) Frontier Holdings 1 L.P. ("ASOF II A (DE) Frontier Holdings 1") and ASOF II A (DE) Frontier Holdings 2 L.P. ("ASOF II A (DE) Frontier Holdings 2", and together with ASOF Frontier AIV A1, ASOF Frontier AIV A2, ASOF Frontier AIV A3, ASOF Frontier AIV A4, ASOF Frontier AIV A5, ASOF Frontier AIV A6, ASOF Frontier AIV A7, ASOF Frontier AIV A8, ASOF Frontier AIV A9, ASOF Frontier AIV A10, and ASOF Frontier AIV A11, ASOF II Frontier Holdings 1, ASOF II Frontier Holdings 2, ASOF II Frontier Holdings 3, ASOF II Frontier Holdings 4, ASOF II Frontier Holdings 5, ASOF II Frontier Holdings 6, ASOF II Frontier Holdings 7 and ASOF II A (DE) Frontier Holdings 1, the "ASOF Funds"), (continued in next footnote)

F5 · balance_after: ASSF IV AIV B Holdings III, L.P. ("ASSF IV AIV B Holdings III"), ASSF IV AIV B, L.P. ("ASSF IV AIV B", and together with ASSF IV AIV B Holdings III, the "ASSF Funds"), ACOF Investment Management LLC ("ACOF Investment Management"), ASOF Investment Management LLC ("ASOF Investment Management"), ASSF Operating Manager IV, L.P. ("ASSF Operating Manager IV"), (continued in next footnote)

F6 · balance_after: Ares Management LLC, Ares Management Holdings L.P. ("Ares Management Holdings"), Ares Holdco LLC ("Ares Holdco"), Ares Management Corporation ("Ares Management"), Ares Management GP LLC ("Ares Management GP"), Ares Voting LLC ("Ares Voting") and Ares Partners Holdco LLC ("Ares Partners", and together with the ACOF Funds, the ASOF Funds, the ASSF Funds, ACOF Investment Management, ASOF Investment Management, ASSF Operating Manager IV, Ares Management LLC, Ares Management Holdings, Ares Holdco, Ares Management, Ares Management GP, and Ares Voting, the "Reporting Persons"). Due to the electronic system's limitation of 10 Reporting Persons per joint filing, this statement is being filed in five parts.

F7 · balance_after: The Reporting Persons collectively beneficially own, or may be deemed to beneficially own, in the aggregate 38,105,498 shares of Common Stock by reason of the direct or indirect beneficial ownership of such shares as follows: (i) ACOF VI Frontier AIV A1 owns 258,196 shares of Common Stock; (ii) ACOF VI Frontier AIV A2 owns 92,590 shares of Common Stock; (iii) ACOF VI Frontier AIV A3 owns 21,604 shares of Common Stock; (iv) ACOF VI Frontier AIV A4 owns 280,859 shares of Common Stock; (v) ACOF VI Frontier AIV A5 owns 308,635 shares of Common Stock; (vi) ACOF VI Frontier AIV A6 owns 172,837 shares of Common Stock; (vii) ACOF VI Frontier AIV A7 owns 312,782 shares of Common Stock; (viii) ACOF VI Frontier AIV A8 owns 314,191 shares of Common Stock; (ix) ACOF VI Frontier AIV A9 owns 295,057 shares of Common Stock; (x) ACOF VI Frontier AIV A10 owns 93,301 shares of Common Stock; (xi) ACOF VI Frontier AIV B1 owns 15,574,332 shares of Common Stock; (continued in next footnote)

F8 · balance_after: (xii) ASOF Frontier AIV A1 owns 105,592 shares of Common Stock; (xiii) ASOF Frontier AIV A2 owns 18,032 shares of Common Stock; (xiv) ASOF Frontier AIV A3 owns 830,837 shares of Common Stock; (xv) ASOF Frontier AIV A4 owns 281,844 shares of Common Stock; (xvi) ASOF Frontier AIV A5 owns 167,160 shares of Common Stock; (xvii) ASOF Frontier AIV A6 owns 292,124 shares of Common Stock; (xviii) ASOF Frontier AIV A7 owns 289,417 shares of Common Stock; (xix) ASOF Frontier AIV A8 owns 238,026 shares of Common Stock; (xx) ASOF Frontier AIV A9 owns 360,644 shares of Common Stock; (xxi) ASOF Frontier AIV A10 owns 259,665 shares of Common Stock; (xxii) ASOF Frontier AIV A11 owns 245,236 shares of Common Stock; (xxiii) ASOF Frontier AIV B1 owns 9,597,579 shares of Common Stock; (continued in next footnote)

F9 · balance_after: (xxiv) ASOF II Frontier Holdings 1 owns 1,486,906 shares of Common Stock, (xxv) ASOF II Frontier Holdings 2 owns 71,667 shares of Common Stock, (xxvi) ASOF II Frontier Holdings 3 owns 79,823 shares of Common Stock, (xxvii) ASOF II Frontier Holdings 4 owns 77,365 shares of Common Stock, (xxviii) ASOF II Frontier Holdings 5 owns 76,622 shares of Common Stock, (xxix) ASOF II Frontier Holdings 6 owns 81,200 shares of Common Stock, (xxx) ASOF II Frontier Holdings 7 owns 81,401 shares of Common Stock, (xxxi) ASOF II A (DE) Frontier Holdings 1 owns 356,191 shares of Common Stock; (xxxii) ASOF II A (DE) Frontier Holdings 2 owns 13,107 shares of Common Stock; (xxxiii) ASSF IV AIV B Holdings III owns 2,694,243 shares of Common Stock and (xxxiv) ASSF IV AIV B directly or indirectly owns 5,348,289 shares of Common Stock.

F10 · balance_after: Ares Partners is the sole member of each of Ares Voting and Ares Management GP, which are respectively the holders of the Class B and Class C common stock of Ares Management, which common stock allows them, collectively, to generally have the majority of the votes on any matter submitted to the stockholders of Ares Management if certain conditions are met. Ares Management is the sole member of Ares Holdco, which is the general partner of Ares Management Holdings, which is the sole member of Ares Management LLC, which is: (a) the sole member of ACOF Investment Management, which is the manager of the ACOF Funds, (b) the sole member of ASOF Investment Management, which is the manager of the ASOF Funds, and (c) the general partner of ASSF Operating Manager IV, which is the manager of the ASSF Funds.

F11 · balance_after: Ares Partners is managed by a board of managers, which is composed of Michael J Arougheti, Ryan Berry, R. Kipp deVeer, David B. Kaplan, Antony P. Ressler and Bennett Rosenthal (collectively, the "Board Members"). Mr. Ressler generally has veto authority over Board Members' decisions.

F12 · balance_after: Each of the Reporting Persons, and the Board Members, and the other directors, officers, partners, stockholders, members and managers of the Reporting Persons, expressly disclaims beneficial ownership of the Common Stock, except to the extent of any pecuniary interest therein, and this Form 4 shall not be deemed an admission that any such person or entity is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purposes.

F1 · ownership.nature: This statement is being filed by ACOF VI Frontier AIV A1, L.P. ("ACOF VI Frontier AIV A1"), ACOF VI Frontier AIV A2, L.P. ("ACOF VI Frontier AIV A2"), ACOF VI Frontier AIV A3, L.P. ("ACOF VI Frontier AIV A3"), ACOF VI Frontier AIV A4, L.P. ("ACOF VI Frontier AIV A4"), ACOF VI Frontier AIV A5, L.P. ("ACOF VI Frontier AIV A5"), ACOF VI Frontier AIV A6, L.P. ("ACOF VI Frontier AIV A6"), ACOF VI Frontier AIV A7, L.P. ("ACOF VI Frontier AIV A7"), ACOF VI Frontier AIV A8, L.P. ("ACOF VI Frontier AIV A8"), ACOF VI Frontier AIV A9, L.P. ("ACOF VI Frontier AIV A9"), ACOF VI Frontier AIV A10, L.P. ("ACOF VI Frontier AIV A10"), and ACOF VI Frontier AIV B1, L.P. ("ACOF VI Frontier AIV B1", together with the foregoing entities, the "ACOF Funds"), (continued in next footnote)

F2 · ownership.nature: ASOF Frontier AIV A1, L.P. ("ASOF Frontier AIV A1"), ASOF Frontier AIV A2, L.P. ("ASOF Frontier AIV A2"), ASOF Frontier AIV A3, L.P. ("ASOF Frontier AIV A3"), ASOF Frontier AIV A4, L.P. ("ASOF Frontier AIV A4"), ASOF Frontier AIV A5, L.P. ("ASOF Frontier AIV A5"), ASOF Frontier AIV A6, L.P. ("ASOF Frontier AIV A6"), ASOF Frontier AIV A7, L.P. ("ASOF Frontier AIV A7"), ASOF Frontier AIV A8, L.P. ("ASOF Frontier AIV A8"), ASOF Frontier AIV A9, L.P. ("ASOF Frontier AIV A9"), ASOF Frontier AIV A10, L.P. ("ASOF Frontier AIV A10"), ASOF Frontier AIV A11, L.P. ("ASOF Frontier AIV A11"), ASOF Frontier AIV B1, L.P. ("ASOF Frontier AIV B1"), (continued in next footnote)

F3 · ownership.nature: ASOF II Frontier Holdings 1 L.P. ("ASOF II Frontier Holdings 1"), ASOF II Frontier Holdings 2 L.P. ("ASOF II Frontier Holdings 2"), ASOF II Frontier Holdings 3 L.P. ("ASOF II Frontier Holdings 3"), ASOF II Frontier Holdings 4 L.P. ("ASOF II Frontier Holdings 4"), ASOF II Frontier Holdings 5 L.P. ("ASOF II Frontier Holdings 5"), ASOF II Frontier Holdings 6 L.P. ("ASOF II Frontier Holdings 6"), (continued in next footnote)

F4 · ownership.nature: ASOF II Frontier Holdings 7 L.P. ("ASOF II Frontier Holdings 7"), ASOF II A (DE) Frontier Holdings 1 L.P. ("ASOF II A (DE) Frontier Holdings 1") and ASOF II A (DE) Frontier Holdings 2 L.P. ("ASOF II A (DE) Frontier Holdings 2", and together with ASOF Frontier AIV A1, ASOF Frontier AIV A2, ASOF Frontier AIV A3, ASOF Frontier AIV A4, ASOF Frontier AIV A5, ASOF Frontier AIV A6, ASOF Frontier AIV A7, ASOF Frontier AIV A8, ASOF Frontier AIV A9, ASOF Frontier AIV A10, and ASOF Frontier AIV A11, ASOF II Frontier Holdings 1, ASOF II Frontier Holdings 2, ASOF II Frontier Holdings 3, ASOF II Frontier Holdings 4, ASOF II Frontier Holdings 5, ASOF II Frontier Holdings 6, ASOF II Frontier Holdings 7 and ASOF II A (DE) Frontier Holdings 1, the "ASOF Funds"), (continued in next footnote)

F5 · ownership.nature: ASSF IV AIV B Holdings III, L.P. ("ASSF IV AIV B Holdings III"), ASSF IV AIV B, L.P. ("ASSF IV AIV B", and together with ASSF IV AIV B Holdings III, the "ASSF Funds"), ACOF Investment Management LLC ("ACOF Investment Management"), ASOF Investment Management LLC ("ASOF Investment Management"), ASSF Operating Manager IV, L.P. ("ASSF Operating Manager IV"), (continued in next footnote)

F6 · ownership.nature: Ares Management LLC, Ares Management Holdings L.P. ("Ares Management Holdings"), Ares Holdco LLC ("Ares Holdco"), Ares Management Corporation ("Ares Management"), Ares Management GP LLC ("Ares Management GP"), Ares Voting LLC ("Ares Voting") and Ares Partners Holdco LLC ("Ares Partners", and together with the ACOF Funds, the ASOF Funds, the ASSF Funds, ACOF Investment Management, ASOF Investment Management, ASSF Operating Manager IV, Ares Management LLC, Ares Management Holdings, Ares Holdco, Ares Management, Ares Management GP, and Ares Voting, the "Reporting Persons"). Due to the electronic system's limitation of 10 Reporting Persons per joint filing, this statement is being filed in five parts.

F7 · ownership.nature: The Reporting Persons collectively beneficially own, or may be deemed to beneficially own, in the aggregate 38,105,498 shares of Common Stock by reason of the direct or indirect beneficial ownership of such shares as follows: (i) ACOF VI Frontier AIV A1 owns 258,196 shares of Common Stock; (ii) ACOF VI Frontier AIV A2 owns 92,590 shares of Common Stock; (iii) ACOF VI Frontier AIV A3 owns 21,604 shares of Common Stock; (iv) ACOF VI Frontier AIV A4 owns 280,859 shares of Common Stock; (v) ACOF VI Frontier AIV A5 owns 308,635 shares of Common Stock; (vi) ACOF VI Frontier AIV A6 owns 172,837 shares of Common Stock; (vii) ACOF VI Frontier AIV A7 owns 312,782 shares of Common Stock; (viii) ACOF VI Frontier AIV A8 owns 314,191 shares of Common Stock; (ix) ACOF VI Frontier AIV A9 owns 295,057 shares of Common Stock; (x) ACOF VI Frontier AIV A10 owns 93,301 shares of Common Stock; (xi) ACOF VI Frontier AIV B1 owns 15,574,332 shares of Common Stock; (continued in next footnote)

F8 · ownership.nature: (xii) ASOF Frontier AIV A1 owns 105,592 shares of Common Stock; (xiii) ASOF Frontier AIV A2 owns 18,032 shares of Common Stock; (xiv) ASOF Frontier AIV A3 owns 830,837 shares of Common Stock; (xv) ASOF Frontier AIV A4 owns 281,844 shares of Common Stock; (xvi) ASOF Frontier AIV A5 owns 167,160 shares of Common Stock; (xvii) ASOF Frontier AIV A6 owns 292,124 shares of Common Stock; (xviii) ASOF Frontier AIV A7 owns 289,417 shares of Common Stock; (xix) ASOF Frontier AIV A8 owns 238,026 shares of Common Stock; (xx) ASOF Frontier AIV A9 owns 360,644 shares of Common Stock; (xxi) ASOF Frontier AIV A10 owns 259,665 shares of Common Stock; (xxii) ASOF Frontier AIV A11 owns 245,236 shares of Common Stock; (xxiii) ASOF Frontier AIV B1 owns 9,597,579 shares of Common Stock; (continued in next footnote)

F9 · ownership.nature: (xxiv) ASOF II Frontier Holdings 1 owns 1,486,906 shares of Common Stock, (xxv) ASOF II Frontier Holdings 2 owns 71,667 shares of Common Stock, (xxvi) ASOF II Frontier Holdings 3 owns 79,823 shares of Common Stock, (xxvii) ASOF II Frontier Holdings 4 owns 77,365 shares of Common Stock, (xxviii) ASOF II Frontier Holdings 5 owns 76,622 shares of Common Stock, (xxix) ASOF II Frontier Holdings 6 owns 81,200 shares of Common Stock, (xxx) ASOF II Frontier Holdings 7 owns 81,401 shares of Common Stock, (xxxi) ASOF II A (DE) Frontier Holdings 1 owns 356,191 shares of Common Stock; (xxxii) ASOF II A (DE) Frontier Holdings 2 owns 13,107 shares of Common Stock; (xxxiii) ASSF IV AIV B Holdings III owns 2,694,243 shares of Common Stock and (xxxiv) ASSF IV AIV B directly or indirectly owns 5,348,289 shares of Common Stock.

F10 · ownership.nature: Ares Partners is the sole member of each of Ares Voting and Ares Management GP, which are respectively the holders of the Class B and Class C common stock of Ares Management, which common stock allows them, collectively, to generally have the majority of the votes on any matter submitted to the stockholders of Ares Management if certain conditions are met. Ares Management is the sole member of Ares Holdco, which is the general partner of Ares Management Holdings, which is the sole member of Ares Management LLC, which is: (a) the sole member of ACOF Investment Management, which is the manager of the ACOF Funds, (b) the sole member of ASOF Investment Management, which is the manager of the ASOF Funds, and (c) the general partner of ASSF Operating Manager IV, which is the manager of the ASSF Funds.

F11 · ownership.nature: Ares Partners is managed by a board of managers, which is composed of Michael J Arougheti, Ryan Berry, R. Kipp deVeer, David B. Kaplan, Antony P. Ressler and Bennett Rosenthal (collectively, the "Board Members"). Mr. Ressler generally has veto authority over Board Members' decisions.

F12 · ownership.nature: Each of the Reporting Persons, and the Board Members, and the other directors, officers, partners, stockholders, members and managers of the Reporting Persons, expressly disclaims beneficial ownership of the Common Stock, except to the extent of any pecuniary interest therein, and this Form 4 shall not be deemed an admission that any such person or entity is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purposes.

SEC source: 0001104659-23-057128 · tm2314962-1_4seq1.xml · nonDerivative · entry 1

ARES MANAGEMENT LLC · CIK 0001259313 · 10% owner

ACOF VI Frontier AIV A1, L.P. · CIK 0001862494 · 10% owner

ACOF VI Frontier AIV A2, L.P. · CIK 0001862499 · 10% owner

ACOF VI Frontier AIV A3, L.P. · CIK 0001862534 · 10% owner

ACOF VI Frontier AIV A4, L.P. · CIK 0001862529 · 10% owner

ACOF VI Frontier AIV A5, L.P. · CIK 0001862526 · 10% owner

ACOF VI Frontier AIV A6, L.P. · CIK 0001862483 · 10% owner

ACOF VI Frontier AIV A7, L.P. · CIK 0001862482 · 10% owner

ACOF VI Frontier AIV A8, L.P. · CIK 0001862505 · 10% owner

ACOF VI Frontier AIV A9, L.P. · CIK 0001862533 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnotes

Disclosed balance after: 37,944,654

F1 · balance_after: This statement is being filed by ACOF VI Frontier AIV A1, L.P. ("ACOF VI Frontier AIV A1"), ACOF VI Frontier AIV A2, L.P. ("ACOF VI Frontier AIV A2"), ACOF VI Frontier AIV A3, L.P. ("ACOF VI Frontier AIV A3"), ACOF VI Frontier AIV A4, L.P. ("ACOF VI Frontier AIV A4"), ACOF VI Frontier AIV A5, L.P. ("ACOF VI Frontier AIV A5"), ACOF VI Frontier AIV A6, L.P. ("ACOF VI Frontier AIV A6"), ACOF VI Frontier AIV A7, L.P. ("ACOF VI Frontier AIV A7"), ACOF VI Frontier AIV A8, L.P. ("ACOF VI Frontier AIV A8"), ACOF VI Frontier AIV A9, L.P. ("ACOF VI Frontier AIV A9"), ACOF VI Frontier AIV A10, L.P. ("ACOF VI Frontier AIV A10"), and ACOF VI Frontier AIV B1, L.P. ("ACOF VI Frontier AIV B1", together with the foregoing entities, the "ACOF Funds"), (continued in next footnote)

F2 · balance_after: ASOF Frontier AIV A1, L.P. ("ASOF Frontier AIV A1"), ASOF Frontier AIV A2, L.P. ("ASOF Frontier AIV A2"), ASOF Frontier AIV A3, L.P. ("ASOF Frontier AIV A3"), ASOF Frontier AIV A4, L.P. ("ASOF Frontier AIV A4"), ASOF Frontier AIV A5, L.P. ("ASOF Frontier AIV A5"), ASOF Frontier AIV A6, L.P. ("ASOF Frontier AIV A6"), ASOF Frontier AIV A7, L.P. ("ASOF Frontier AIV A7"), ASOF Frontier AIV A8, L.P. ("ASOF Frontier AIV A8"), ASOF Frontier AIV A9, L.P. ("ASOF Frontier AIV A9"), ASOF Frontier AIV A10, L.P. ("ASOF Frontier AIV A10"), ASOF Frontier AIV A11, L.P. ("ASOF Frontier AIV A11"), ASOF Frontier AIV B1, L.P. ("ASOF Frontier AIV B1"), (continued in next footnote)

F3 · balance_after: ASOF II Frontier Holdings 1 L.P. ("ASOF II Frontier Holdings 1"), ASOF II Frontier Holdings 2 L.P. ("ASOF II Frontier Holdings 2"), ASOF II Frontier Holdings 3 L.P. ("ASOF II Frontier Holdings 3"), ASOF II Frontier Holdings 4 L.P. ("ASOF II Frontier Holdings 4"), ASOF II Frontier Holdings 5 L.P. ("ASOF II Frontier Holdings 5"), ASOF II Frontier Holdings 6 L.P. ("ASOF II Frontier Holdings 6"), (continued in next footnote)

F4 · balance_after: ASOF II Frontier Holdings 7 L.P. ("ASOF II Frontier Holdings 7"), ASOF II A (DE) Frontier Holdings 1 L.P. ("ASOF II A (DE) Frontier Holdings 1") and ASOF II A (DE) Frontier Holdings 2 L.P. ("ASOF II A (DE) Frontier Holdings 2", and together with ASOF Frontier AIV A1, ASOF Frontier AIV A2, ASOF Frontier AIV A3, ASOF Frontier AIV A4, ASOF Frontier AIV A5, ASOF Frontier AIV A6, ASOF Frontier AIV A7, ASOF Frontier AIV A8, ASOF Frontier AIV A9, ASOF Frontier AIV A10, and ASOF Frontier AIV A11, ASOF II Frontier Holdings 1, ASOF II Frontier Holdings 2, ASOF II Frontier Holdings 3, ASOF II Frontier Holdings 4, ASOF II Frontier Holdings 5, ASOF II Frontier Holdings 6, ASOF II Frontier Holdings 7 and ASOF II A (DE) Frontier Holdings 1, the "ASOF Funds"), (continued in next footnote)

F5 · balance_after: ASSF IV AIV B Holdings III, L.P. ("ASSF IV AIV B Holdings III"), ASSF IV AIV B, L.P. ("ASSF IV AIV B", and together with ASSF IV AIV B Holdings III, the "ASSF Funds"), ACOF Investment Management LLC ("ACOF Investment Management"), ASOF Investment Management LLC ("ASOF Investment Management"), ASSF Operating Manager IV, L.P. ("ASSF Operating Manager IV"), (continued in next footnote)

F6 · balance_after: Ares Management LLC, Ares Management Holdings L.P. ("Ares Management Holdings"), Ares Holdco LLC ("Ares Holdco"), Ares Management Corporation ("Ares Management"), Ares Management GP LLC ("Ares Management GP"), Ares Voting LLC ("Ares Voting") and Ares Partners Holdco LLC ("Ares Partners", and together with the ACOF Funds, the ASOF Funds, the ASSF Funds, ACOF Investment Management, ASOF Investment Management, ASSF Operating Manager IV, Ares Management LLC, Ares Management Holdings, Ares Holdco, Ares Management, Ares Management GP, and Ares Voting, the "Reporting Persons"). Due to the electronic system's limitation of 10 Reporting Persons per joint filing, this statement is being filed in five parts.

F7 · balance_after: The Reporting Persons collectively beneficially own, or may be deemed to beneficially own, in the aggregate 38,105,498 shares of Common Stock by reason of the direct or indirect beneficial ownership of such shares as follows: (i) ACOF VI Frontier AIV A1 owns 258,196 shares of Common Stock; (ii) ACOF VI Frontier AIV A2 owns 92,590 shares of Common Stock; (iii) ACOF VI Frontier AIV A3 owns 21,604 shares of Common Stock; (iv) ACOF VI Frontier AIV A4 owns 280,859 shares of Common Stock; (v) ACOF VI Frontier AIV A5 owns 308,635 shares of Common Stock; (vi) ACOF VI Frontier AIV A6 owns 172,837 shares of Common Stock; (vii) ACOF VI Frontier AIV A7 owns 312,782 shares of Common Stock; (viii) ACOF VI Frontier AIV A8 owns 314,191 shares of Common Stock; (ix) ACOF VI Frontier AIV A9 owns 295,057 shares of Common Stock; (x) ACOF VI Frontier AIV A10 owns 93,301 shares of Common Stock; (xi) ACOF VI Frontier AIV B1 owns 15,574,332 shares of Common Stock; (continued in next footnote)

F8 · balance_after: (xii) ASOF Frontier AIV A1 owns 105,592 shares of Common Stock; (xiii) ASOF Frontier AIV A2 owns 18,032 shares of Common Stock; (xiv) ASOF Frontier AIV A3 owns 830,837 shares of Common Stock; (xv) ASOF Frontier AIV A4 owns 281,844 shares of Common Stock; (xvi) ASOF Frontier AIV A5 owns 167,160 shares of Common Stock; (xvii) ASOF Frontier AIV A6 owns 292,124 shares of Common Stock; (xviii) ASOF Frontier AIV A7 owns 289,417 shares of Common Stock; (xix) ASOF Frontier AIV A8 owns 238,026 shares of Common Stock; (xx) ASOF Frontier AIV A9 owns 360,644 shares of Common Stock; (xxi) ASOF Frontier AIV A10 owns 259,665 shares of Common Stock; (xxii) ASOF Frontier AIV A11 owns 245,236 shares of Common Stock; (xxiii) ASOF Frontier AIV B1 owns 9,597,579 shares of Common Stock; (continued in next footnote)

F9 · balance_after: (xxiv) ASOF II Frontier Holdings 1 owns 1,486,906 shares of Common Stock, (xxv) ASOF II Frontier Holdings 2 owns 71,667 shares of Common Stock, (xxvi) ASOF II Frontier Holdings 3 owns 79,823 shares of Common Stock, (xxvii) ASOF II Frontier Holdings 4 owns 77,365 shares of Common Stock, (xxviii) ASOF II Frontier Holdings 5 owns 76,622 shares of Common Stock, (xxix) ASOF II Frontier Holdings 6 owns 81,200 shares of Common Stock, (xxx) ASOF II Frontier Holdings 7 owns 81,401 shares of Common Stock, (xxxi) ASOF II A (DE) Frontier Holdings 1 owns 356,191 shares of Common Stock; (xxxii) ASOF II A (DE) Frontier Holdings 2 owns 13,107 shares of Common Stock; (xxxiii) ASSF IV AIV B Holdings III owns 2,694,243 shares of Common Stock and (xxxiv) ASSF IV AIV B directly or indirectly owns 5,348,289 shares of Common Stock.

F10 · balance_after: Ares Partners is the sole member of each of Ares Voting and Ares Management GP, which are respectively the holders of the Class B and Class C common stock of Ares Management, which common stock allows them, collectively, to generally have the majority of the votes on any matter submitted to the stockholders of Ares Management if certain conditions are met. Ares Management is the sole member of Ares Holdco, which is the general partner of Ares Management Holdings, which is the sole member of Ares Management LLC, which is: (a) the sole member of ACOF Investment Management, which is the manager of the ACOF Funds, (b) the sole member of ASOF Investment Management, which is the manager of the ASOF Funds, and (c) the general partner of ASSF Operating Manager IV, which is the manager of the ASSF Funds.

F11 · balance_after: Ares Partners is managed by a board of managers, which is composed of Michael J Arougheti, Ryan Berry, R. Kipp deVeer, David B. Kaplan, Antony P. Ressler and Bennett Rosenthal (collectively, the "Board Members"). Mr. Ressler generally has veto authority over Board Members' decisions.

F12 · balance_after: Each of the Reporting Persons, and the Board Members, and the other directors, officers, partners, stockholders, members and managers of the Reporting Persons, expressly disclaims beneficial ownership of the Common Stock, except to the extent of any pecuniary interest therein, and this Form 4 shall not be deemed an admission that any such person or entity is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purposes.

F1 · ownership.nature: This statement is being filed by ACOF VI Frontier AIV A1, L.P. ("ACOF VI Frontier AIV A1"), ACOF VI Frontier AIV A2, L.P. ("ACOF VI Frontier AIV A2"), ACOF VI Frontier AIV A3, L.P. ("ACOF VI Frontier AIV A3"), ACOF VI Frontier AIV A4, L.P. ("ACOF VI Frontier AIV A4"), ACOF VI Frontier AIV A5, L.P. ("ACOF VI Frontier AIV A5"), ACOF VI Frontier AIV A6, L.P. ("ACOF VI Frontier AIV A6"), ACOF VI Frontier AIV A7, L.P. ("ACOF VI Frontier AIV A7"), ACOF VI Frontier AIV A8, L.P. ("ACOF VI Frontier AIV A8"), ACOF VI Frontier AIV A9, L.P. ("ACOF VI Frontier AIV A9"), ACOF VI Frontier AIV A10, L.P. ("ACOF VI Frontier AIV A10"), and ACOF VI Frontier AIV B1, L.P. ("ACOF VI Frontier AIV B1", together with the foregoing entities, the "ACOF Funds"), (continued in next footnote)

F2 · ownership.nature: ASOF Frontier AIV A1, L.P. ("ASOF Frontier AIV A1"), ASOF Frontier AIV A2, L.P. ("ASOF Frontier AIV A2"), ASOF Frontier AIV A3, L.P. ("ASOF Frontier AIV A3"), ASOF Frontier AIV A4, L.P. ("ASOF Frontier AIV A4"), ASOF Frontier AIV A5, L.P. ("ASOF Frontier AIV A5"), ASOF Frontier AIV A6, L.P. ("ASOF Frontier AIV A6"), ASOF Frontier AIV A7, L.P. ("ASOF Frontier AIV A7"), ASOF Frontier AIV A8, L.P. ("ASOF Frontier AIV A8"), ASOF Frontier AIV A9, L.P. ("ASOF Frontier AIV A9"), ASOF Frontier AIV A10, L.P. ("ASOF Frontier AIV A10"), ASOF Frontier AIV A11, L.P. ("ASOF Frontier AIV A11"), ASOF Frontier AIV B1, L.P. ("ASOF Frontier AIV B1"), (continued in next footnote)

F3 · ownership.nature: ASOF II Frontier Holdings 1 L.P. ("ASOF II Frontier Holdings 1"), ASOF II Frontier Holdings 2 L.P. ("ASOF II Frontier Holdings 2"), ASOF II Frontier Holdings 3 L.P. ("ASOF II Frontier Holdings 3"), ASOF II Frontier Holdings 4 L.P. ("ASOF II Frontier Holdings 4"), ASOF II Frontier Holdings 5 L.P. ("ASOF II Frontier Holdings 5"), ASOF II Frontier Holdings 6 L.P. ("ASOF II Frontier Holdings 6"), (continued in next footnote)

F4 · ownership.nature: ASOF II Frontier Holdings 7 L.P. ("ASOF II Frontier Holdings 7"), ASOF II A (DE) Frontier Holdings 1 L.P. ("ASOF II A (DE) Frontier Holdings 1") and ASOF II A (DE) Frontier Holdings 2 L.P. ("ASOF II A (DE) Frontier Holdings 2", and together with ASOF Frontier AIV A1, ASOF Frontier AIV A2, ASOF Frontier AIV A3, ASOF Frontier AIV A4, ASOF Frontier AIV A5, ASOF Frontier AIV A6, ASOF Frontier AIV A7, ASOF Frontier AIV A8, ASOF Frontier AIV A9, ASOF Frontier AIV A10, and ASOF Frontier AIV A11, ASOF II Frontier Holdings 1, ASOF II Frontier Holdings 2, ASOF II Frontier Holdings 3, ASOF II Frontier Holdings 4, ASOF II Frontier Holdings 5, ASOF II Frontier Holdings 6, ASOF II Frontier Holdings 7 and ASOF II A (DE) Frontier Holdings 1, the "ASOF Funds"), (continued in next footnote)

F5 · ownership.nature: ASSF IV AIV B Holdings III, L.P. ("ASSF IV AIV B Holdings III"), ASSF IV AIV B, L.P. ("ASSF IV AIV B", and together with ASSF IV AIV B Holdings III, the "ASSF Funds"), ACOF Investment Management LLC ("ACOF Investment Management"), ASOF Investment Management LLC ("ASOF Investment Management"), ASSF Operating Manager IV, L.P. ("ASSF Operating Manager IV"), (continued in next footnote)

F6 · ownership.nature: Ares Management LLC, Ares Management Holdings L.P. ("Ares Management Holdings"), Ares Holdco LLC ("Ares Holdco"), Ares Management Corporation ("Ares Management"), Ares Management GP LLC ("Ares Management GP"), Ares Voting LLC ("Ares Voting") and Ares Partners Holdco LLC ("Ares Partners", and together with the ACOF Funds, the ASOF Funds, the ASSF Funds, ACOF Investment Management, ASOF Investment Management, ASSF Operating Manager IV, Ares Management LLC, Ares Management Holdings, Ares Holdco, Ares Management, Ares Management GP, and Ares Voting, the "Reporting Persons"). Due to the electronic system's limitation of 10 Reporting Persons per joint filing, this statement is being filed in five parts.

F7 · ownership.nature: The Reporting Persons collectively beneficially own, or may be deemed to beneficially own, in the aggregate 38,105,498 shares of Common Stock by reason of the direct or indirect beneficial ownership of such shares as follows: (i) ACOF VI Frontier AIV A1 owns 258,196 shares of Common Stock; (ii) ACOF VI Frontier AIV A2 owns 92,590 shares of Common Stock; (iii) ACOF VI Frontier AIV A3 owns 21,604 shares of Common Stock; (iv) ACOF VI Frontier AIV A4 owns 280,859 shares of Common Stock; (v) ACOF VI Frontier AIV A5 owns 308,635 shares of Common Stock; (vi) ACOF VI Frontier AIV A6 owns 172,837 shares of Common Stock; (vii) ACOF VI Frontier AIV A7 owns 312,782 shares of Common Stock; (viii) ACOF VI Frontier AIV A8 owns 314,191 shares of Common Stock; (ix) ACOF VI Frontier AIV A9 owns 295,057 shares of Common Stock; (x) ACOF VI Frontier AIV A10 owns 93,301 shares of Common Stock; (xi) ACOF VI Frontier AIV B1 owns 15,574,332 shares of Common Stock; (continued in next footnote)

F8 · ownership.nature: (xii) ASOF Frontier AIV A1 owns 105,592 shares of Common Stock; (xiii) ASOF Frontier AIV A2 owns 18,032 shares of Common Stock; (xiv) ASOF Frontier AIV A3 owns 830,837 shares of Common Stock; (xv) ASOF Frontier AIV A4 owns 281,844 shares of Common Stock; (xvi) ASOF Frontier AIV A5 owns 167,160 shares of Common Stock; (xvii) ASOF Frontier AIV A6 owns 292,124 shares of Common Stock; (xviii) ASOF Frontier AIV A7 owns 289,417 shares of Common Stock; (xix) ASOF Frontier AIV A8 owns 238,026 shares of Common Stock; (xx) ASOF Frontier AIV A9 owns 360,644 shares of Common Stock; (xxi) ASOF Frontier AIV A10 owns 259,665 shares of Common Stock; (xxii) ASOF Frontier AIV A11 owns 245,236 shares of Common Stock; (xxiii) ASOF Frontier AIV B1 owns 9,597,579 shares of Common Stock; (continued in next footnote)

F9 · ownership.nature: (xxiv) ASOF II Frontier Holdings 1 owns 1,486,906 shares of Common Stock, (xxv) ASOF II Frontier Holdings 2 owns 71,667 shares of Common Stock, (xxvi) ASOF II Frontier Holdings 3 owns 79,823 shares of Common Stock, (xxvii) ASOF II Frontier Holdings 4 owns 77,365 shares of Common Stock, (xxviii) ASOF II Frontier Holdings 5 owns 76,622 shares of Common Stock, (xxix) ASOF II Frontier Holdings 6 owns 81,200 shares of Common Stock, (xxx) ASOF II Frontier Holdings 7 owns 81,401 shares of Common Stock, (xxxi) ASOF II A (DE) Frontier Holdings 1 owns 356,191 shares of Common Stock; (xxxii) ASOF II A (DE) Frontier Holdings 2 owns 13,107 shares of Common Stock; (xxxiii) ASSF IV AIV B Holdings III owns 2,694,243 shares of Common Stock and (xxxiv) ASSF IV AIV B directly or indirectly owns 5,348,289 shares of Common Stock.

F10 · ownership.nature: Ares Partners is the sole member of each of Ares Voting and Ares Management GP, which are respectively the holders of the Class B and Class C common stock of Ares Management, which common stock allows them, collectively, to generally have the majority of the votes on any matter submitted to the stockholders of Ares Management if certain conditions are met. Ares Management is the sole member of Ares Holdco, which is the general partner of Ares Management Holdings, which is the sole member of Ares Management LLC, which is: (a) the sole member of ACOF Investment Management, which is the manager of the ACOF Funds, (b) the sole member of ASOF Investment Management, which is the manager of the ASOF Funds, and (c) the general partner of ASSF Operating Manager IV, which is the manager of the ASSF Funds.

F11 · ownership.nature: Ares Partners is managed by a board of managers, which is composed of Michael J Arougheti, Ryan Berry, R. Kipp deVeer, David B. Kaplan, Antony P. Ressler and Bennett Rosenthal (collectively, the "Board Members"). Mr. Ressler generally has veto authority over Board Members' decisions.

F12 · ownership.nature: Each of the Reporting Persons, and the Board Members, and the other directors, officers, partners, stockholders, members and managers of the Reporting Persons, expressly disclaims beneficial ownership of the Common Stock, except to the extent of any pecuniary interest therein, and this Form 4 shall not be deemed an admission that any such person or entity is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purposes.

SEC source: 0001104659-23-051304 · tm2313949-1_4seq.xml · nonDerivative · entry 1

ARES MANAGEMENT LLC · CIK 0001259313 · 10% owner

ACOF VI Frontier AIV A1, L.P. · CIK 0001862494 · 10% owner

ACOF VI Frontier AIV A2, L.P. · CIK 0001862499 · 10% owner

ACOF VI Frontier AIV A3, L.P. · CIK 0001862534 · 10% owner

ACOF VI Frontier AIV A4, L.P. · CIK 0001862529 · 10% owner

ACOF VI Frontier AIV A5, L.P. · CIK 0001862526 · 10% owner

ACOF VI Frontier AIV A6, L.P. · CIK 0001862483 · 10% owner

ACOF VI Frontier AIV A7, L.P. · CIK 0001862482 · 10% owner

ACOF VI Frontier AIV A8, L.P. · CIK 0001862505 · 10% owner

ACOF VI Frontier AIV A9, L.P. · CIK 0001862533 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnotes

Disclosed balance after: 37,744,654

F1 · balance_after: This statement is being filed by ACOF VI Frontier AIV A1, L.P. ("ACOF VI Frontier AIV A1"), ACOF VI Frontier AIV A2, L.P. ("ACOF VI Frontier AIV A2"), ACOF VI Frontier AIV A3, L.P. ("ACOF VI Frontier AIV A3"), ACOF VI Frontier AIV A4, L.P. ("ACOF VI Frontier AIV A4"), ACOF VI Frontier AIV A5, L.P. ("ACOF VI Frontier AIV A5"), ACOF VI Frontier AIV A6, L.P. ("ACOF VI Frontier AIV A6"), ACOF VI Frontier AIV A7, L.P. ("ACOF VI Frontier AIV A7"), ACOF VI Frontier AIV A8, L.P. ("ACOF VI Frontier AIV A8"), ACOF VI Frontier AIV A9, L.P. ("ACOF VI Frontier AIV A9"), ACOF VI Frontier AIV A10, L.P. ("ACOF VI Frontier AIV A10"), and ACOF VI Frontier AIV B1, L.P. ("ACOF VI Frontier AIV B1", together with the foregoing entities, the "ACOF Funds"), (continued in next footnote)

F2 · balance_after: ASOF Frontier AIV A1, L.P. ("ASOF Frontier AIV A1"), ASOF Frontier AIV A2, L.P. ("ASOF Frontier AIV A2"), ASOF Frontier AIV A3, L.P. ("ASOF Frontier AIV A3"), ASOF Frontier AIV A4, L.P. ("ASOF Frontier AIV A4"), ASOF Frontier AIV A5, L.P. ("ASOF Frontier AIV A5"), ASOF Frontier AIV A6, L.P. ("ASOF Frontier AIV A6"), ASOF Frontier AIV A7, L.P. ("ASOF Frontier AIV A7"), ASOF Frontier AIV A8, L.P. ("ASOF Frontier AIV A8"), ASOF Frontier AIV A9, L.P. ("ASOF Frontier AIV A9"), ASOF Frontier AIV A10, L.P. ("ASOF Frontier AIV A10"), ASOF Frontier AIV A11, L.P. ("ASOF Frontier AIV A11"), ASOF Frontier AIV B1, L.P. ("ASOF Frontier AIV B1"), (continued in next footnote)

F3 · balance_after: ASOF II Frontier Holdings 1 L.P. ("ASOF II Frontier Holdings 1"), ASOF II Frontier Holdings 2 L.P. ("ASOF II Frontier Holdings 2"), ASOF II Frontier Holdings 3 L.P. ("ASOF II Frontier Holdings 3"), ASOF II Frontier Holdings 4 L.P. ("ASOF II Frontier Holdings 4"), ASOF II Frontier Holdings 5 L.P. ("ASOF II Frontier Holdings 5"), ASOF II Frontier Holdings 6 L.P. ("ASOF II Frontier Holdings 6"), (continued in next footnote)

F4 · balance_after: ASOF II Frontier Holdings 7 L.P. ("ASOF II Frontier Holdings 7"), ASOF II A (DE) Frontier Holdings 1 L.P. ("ASOF II A (DE) Frontier Holdings 1") and ASOF II A (DE) Frontier Holdings 2 L.P. ("ASOF II A (DE) Frontier Holdings 2", and together with ASOF Frontier AIV A1, ASOF Frontier AIV A2, ASOF Frontier AIV A3, ASOF Frontier AIV A4, ASOF Frontier AIV A5, ASOF Frontier AIV A6, ASOF Frontier AIV A7, ASOF Frontier AIV A8, ASOF Frontier AIV A9, ASOF Frontier AIV A10, and ASOF Frontier AIV A11, ASOF II Frontier Holdings 1, ASOF II Frontier Holdings 2, ASOF II Frontier Holdings 3, ASOF II Frontier Holdings 4, ASOF II Frontier Holdings 5, ASOF II Frontier Holdings 6, ASOF II Frontier Holdings 7 and ASOF II A (DE) Frontier Holdings 1, the "ASOF Funds"), (continued in next footnote)

F5 · balance_after: ASSF IV AIV B Holdings III, L.P. ("ASSF IV AIV B Holdings III"), ASSF IV AIV B, L.P. ("ASSF IV AIV B", and together with ASSF IV AIV B Holdings III, the "ASSF Funds"), ACOF Investment Management LLC ("ACOF Investment Management"), ASOF Investment Management LLC ("ASOF Investment Management"), ASSF Operating Manager IV, L.P. ("ASSF Operating Manager IV"), (continued in next footnote)

F6 · balance_after: Ares Management LLC, Ares Management Holdings L.P. ("Ares Management Holdings"), Ares Holdco LLC ("Ares Holdco"), Ares Management Corporation ("Ares Management"), Ares Management GP LLC ("Ares Management GP"), Ares Voting LLC ("Ares Voting") and Ares Partners Holdco LLC ("Ares Partners", and together with the ACOF Funds, the ASOF Funds, the ASSF Funds, ACOF Investment Management, ASOF Investment Management, ASSF Operating Manager IV, Ares Management LLC, Ares Management Holdings, Ares Holdco, Ares Management, Ares Management GP, and Ares Voting, the "Reporting Persons"). Due to the electronic system's limitation of 10 Reporting Persons per joint filing, this statement is being filed in five parts.

F7 · balance_after: The Reporting Persons collectively beneficially own, or may be deemed to beneficially own, in the aggregate 37,744,654 shares of Common Stock by reason of the direct or indirect beneficial ownership of such shares as follows: (i) ACOF VI Frontier AIV A1 owns 256,935 shares of Common Stock; (ii) ACOF VI Frontier AIV A2 owns 92,138 shares of Common Stock; (iii) ACOF VI Frontier AIV A3 owns 21,499 shares of Common Stock; (iv) ACOF VI Frontier AIV A4 owns 279,486 shares of Common Stock; (v) ACOF VI Frontier AIV A5 owns 307,127 shares of Common Stock; (vi) ACOF VI Frontier AIV A6 owns 171,993 shares of Common Stock; (vii) ACOF VI Frontier AIV A7 owns 311,254 shares of Common Stock; (viii) ACOF VI Frontier AIV A8 owns 312,656 shares of Common Stock; (ix) ACOF VI Frontier AIV A9 owns 293,615 shares of Common Stock; (x) ACOF VI Frontier AIV A10 owns 92,845 shares of Common Stock; (xi) ACOF VI Frontier AIV B1 owns 15,498,235 shares of Common Stock; (continued in next footnote)

F8 · balance_after: (xii) ASOF Frontier AIV A1 owns 105,592 shares of Common Stock; (xiii) ASOF Frontier AIV A2 owns 18,032 shares of Common Stock; (xiv) ASOF Frontier AIV A3 owns 830,837 shares of Common Stock; (xv) ASOF Frontier AIV A4 owns 281,844 shares of Common Stock; (xvi) ASOF Frontier AIV A5 owns 167,160 shares of Common Stock; (xvii) ASOF Frontier AIV A6 owns 292,124 shares of Common Stock; (xviii) ASOF Frontier AIV A7 owns 289,417 shares of Common Stock; (xix) ASOF Frontier AIV A8 owns 238,026 shares of Common Stock; (xx) ASOF Frontier AIV A9 owns 360,644 shares of Common Stock; (xxi) ASOF Frontier AIV A10 owns 259,665 shares of Common Stock; (xxii) ASOF Frontier AIV A11 owns 245,236 shares of Common Stock; (xxiii) ASOF Frontier AIV B1 owns 9,597,579 shares of Common Stock; (continued in next footnote)

F9 · balance_after: (xxiv) ASOF II Frontier Holdings 1 owns 1,311,465 shares of Common Stock, (xxv) ASOF II Frontier Holdings 2 owns 63,211 shares of Common Stock, (xxvi) ASOF II Frontier Holdings 3 owns 70,405 shares of Common Stock, (xxvii) ASOF II Frontier Holdings 4 owns 68,237 shares of Common Stock, (xxviii) ASOF II Frontier Holdings 5 owns 67,581 shares of Common Stock, (xxix) ASOF II Frontier Holdings 6 owns 71,619 shares of Common Stock, (xxx) ASOF II Frontier Holdings 7 owns 71,797 shares of Common Stock, (xxxi) ASOF II A (DE) Frontier Holdings 1 owns 314,164 shares of Common Stock; (xxxii) ASOF II A (DE) Frontier Holdings 2 owns 11,560 shares of Common Stock; (xxxiii) ASSF IV AIV B Holdings III owns 2,694,243 shares of Common Stock and (xxxiv) ASSF IV AIV B directly or indirectly owns 5,348,289 shares of Common Stock.

F10 · balance_after: Ares Partners is the sole member of each of Ares Voting and Ares Management GP, which are respectively the holders of the Class B and Class C common stock of Ares Management, which common stock allows them, collectively, to generally have the majority of the votes on any matter submitted to the stockholders of Ares Management if certain conditions are met. Ares Management is the sole member of Ares Holdco, which is the general partner of Ares Management Holdings, which is the sole member of Ares Management LLC, which is: (a) the sole member of ACOF Investment Management, which is the manager of the ACOF Funds, (b) the sole member of ASOF Investment Management, which is the manager of the ASOF Funds, and (c) the general partner of ASSF Operating Manager IV, which is the manager of the ASSF Funds.

F11 · balance_after: Ares Partners is managed by a board of managers, which is composed of Michael J Arougheti, Ryan Berry, R. Kipp deVeer, David B. Kaplan, Antony P. Ressler and Bennett Rosenthal (collectively, the "Board Members"). Mr. Ressler generally has veto authority over Board Members' decisions.

F12 · balance_after: Each of the Reporting Persons, and the Board Members, and the other directors, officers, partners, stockholders, members and managers of the Reporting Persons, expressly disclaims beneficial ownership of the Common Stock, except to the extent of any pecuniary interest therein, and this Form 4 shall not be deemed an admission that any such person or entity is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purposes.

F1 · ownership.nature: This statement is being filed by ACOF VI Frontier AIV A1, L.P. ("ACOF VI Frontier AIV A1"), ACOF VI Frontier AIV A2, L.P. ("ACOF VI Frontier AIV A2"), ACOF VI Frontier AIV A3, L.P. ("ACOF VI Frontier AIV A3"), ACOF VI Frontier AIV A4, L.P. ("ACOF VI Frontier AIV A4"), ACOF VI Frontier AIV A5, L.P. ("ACOF VI Frontier AIV A5"), ACOF VI Frontier AIV A6, L.P. ("ACOF VI Frontier AIV A6"), ACOF VI Frontier AIV A7, L.P. ("ACOF VI Frontier AIV A7"), ACOF VI Frontier AIV A8, L.P. ("ACOF VI Frontier AIV A8"), ACOF VI Frontier AIV A9, L.P. ("ACOF VI Frontier AIV A9"), ACOF VI Frontier AIV A10, L.P. ("ACOF VI Frontier AIV A10"), and ACOF VI Frontier AIV B1, L.P. ("ACOF VI Frontier AIV B1", together with the foregoing entities, the "ACOF Funds"), (continued in next footnote)

F2 · ownership.nature: ASOF Frontier AIV A1, L.P. ("ASOF Frontier AIV A1"), ASOF Frontier AIV A2, L.P. ("ASOF Frontier AIV A2"), ASOF Frontier AIV A3, L.P. ("ASOF Frontier AIV A3"), ASOF Frontier AIV A4, L.P. ("ASOF Frontier AIV A4"), ASOF Frontier AIV A5, L.P. ("ASOF Frontier AIV A5"), ASOF Frontier AIV A6, L.P. ("ASOF Frontier AIV A6"), ASOF Frontier AIV A7, L.P. ("ASOF Frontier AIV A7"), ASOF Frontier AIV A8, L.P. ("ASOF Frontier AIV A8"), ASOF Frontier AIV A9, L.P. ("ASOF Frontier AIV A9"), ASOF Frontier AIV A10, L.P. ("ASOF Frontier AIV A10"), ASOF Frontier AIV A11, L.P. ("ASOF Frontier AIV A11"), ASOF Frontier AIV B1, L.P. ("ASOF Frontier AIV B1"), (continued in next footnote)

F3 · ownership.nature: ASOF II Frontier Holdings 1 L.P. ("ASOF II Frontier Holdings 1"), ASOF II Frontier Holdings 2 L.P. ("ASOF II Frontier Holdings 2"), ASOF II Frontier Holdings 3 L.P. ("ASOF II Frontier Holdings 3"), ASOF II Frontier Holdings 4 L.P. ("ASOF II Frontier Holdings 4"), ASOF II Frontier Holdings 5 L.P. ("ASOF II Frontier Holdings 5"), ASOF II Frontier Holdings 6 L.P. ("ASOF II Frontier Holdings 6"), (continued in next footnote)

F4 · ownership.nature: ASOF II Frontier Holdings 7 L.P. ("ASOF II Frontier Holdings 7"), ASOF II A (DE) Frontier Holdings 1 L.P. ("ASOF II A (DE) Frontier Holdings 1") and ASOF II A (DE) Frontier Holdings 2 L.P. ("ASOF II A (DE) Frontier Holdings 2", and together with ASOF Frontier AIV A1, ASOF Frontier AIV A2, ASOF Frontier AIV A3, ASOF Frontier AIV A4, ASOF Frontier AIV A5, ASOF Frontier AIV A6, ASOF Frontier AIV A7, ASOF Frontier AIV A8, ASOF Frontier AIV A9, ASOF Frontier AIV A10, and ASOF Frontier AIV A11, ASOF II Frontier Holdings 1, ASOF II Frontier Holdings 2, ASOF II Frontier Holdings 3, ASOF II Frontier Holdings 4, ASOF II Frontier Holdings 5, ASOF II Frontier Holdings 6, ASOF II Frontier Holdings 7 and ASOF II A (DE) Frontier Holdings 1, the "ASOF Funds"), (continued in next footnote)

F5 · ownership.nature: ASSF IV AIV B Holdings III, L.P. ("ASSF IV AIV B Holdings III"), ASSF IV AIV B, L.P. ("ASSF IV AIV B", and together with ASSF IV AIV B Holdings III, the "ASSF Funds"), ACOF Investment Management LLC ("ACOF Investment Management"), ASOF Investment Management LLC ("ASOF Investment Management"), ASSF Operating Manager IV, L.P. ("ASSF Operating Manager IV"), (continued in next footnote)

F6 · ownership.nature: Ares Management LLC, Ares Management Holdings L.P. ("Ares Management Holdings"), Ares Holdco LLC ("Ares Holdco"), Ares Management Corporation ("Ares Management"), Ares Management GP LLC ("Ares Management GP"), Ares Voting LLC ("Ares Voting") and Ares Partners Holdco LLC ("Ares Partners", and together with the ACOF Funds, the ASOF Funds, the ASSF Funds, ACOF Investment Management, ASOF Investment Management, ASSF Operating Manager IV, Ares Management LLC, Ares Management Holdings, Ares Holdco, Ares Management, Ares Management GP, and Ares Voting, the "Reporting Persons"). Due to the electronic system's limitation of 10 Reporting Persons per joint filing, this statement is being filed in five parts.

F7 · ownership.nature: The Reporting Persons collectively beneficially own, or may be deemed to beneficially own, in the aggregate 37,744,654 shares of Common Stock by reason of the direct or indirect beneficial ownership of such shares as follows: (i) ACOF VI Frontier AIV A1 owns 256,935 shares of Common Stock; (ii) ACOF VI Frontier AIV A2 owns 92,138 shares of Common Stock; (iii) ACOF VI Frontier AIV A3 owns 21,499 shares of Common Stock; (iv) ACOF VI Frontier AIV A4 owns 279,486 shares of Common Stock; (v) ACOF VI Frontier AIV A5 owns 307,127 shares of Common Stock; (vi) ACOF VI Frontier AIV A6 owns 171,993 shares of Common Stock; (vii) ACOF VI Frontier AIV A7 owns 311,254 shares of Common Stock; (viii) ACOF VI Frontier AIV A8 owns 312,656 shares of Common Stock; (ix) ACOF VI Frontier AIV A9 owns 293,615 shares of Common Stock; (x) ACOF VI Frontier AIV A10 owns 92,845 shares of Common Stock; (xi) ACOF VI Frontier AIV B1 owns 15,498,235 shares of Common Stock; (continued in next footnote)

F8 · ownership.nature: (xii) ASOF Frontier AIV A1 owns 105,592 shares of Common Stock; (xiii) ASOF Frontier AIV A2 owns 18,032 shares of Common Stock; (xiv) ASOF Frontier AIV A3 owns 830,837 shares of Common Stock; (xv) ASOF Frontier AIV A4 owns 281,844 shares of Common Stock; (xvi) ASOF Frontier AIV A5 owns 167,160 shares of Common Stock; (xvii) ASOF Frontier AIV A6 owns 292,124 shares of Common Stock; (xviii) ASOF Frontier AIV A7 owns 289,417 shares of Common Stock; (xix) ASOF Frontier AIV A8 owns 238,026 shares of Common Stock; (xx) ASOF Frontier AIV A9 owns 360,644 shares of Common Stock; (xxi) ASOF Frontier AIV A10 owns 259,665 shares of Common Stock; (xxii) ASOF Frontier AIV A11 owns 245,236 shares of Common Stock; (xxiii) ASOF Frontier AIV B1 owns 9,597,579 shares of Common Stock; (continued in next footnote)

F9 · ownership.nature: (xxiv) ASOF II Frontier Holdings 1 owns 1,311,465 shares of Common Stock, (xxv) ASOF II Frontier Holdings 2 owns 63,211 shares of Common Stock, (xxvi) ASOF II Frontier Holdings 3 owns 70,405 shares of Common Stock, (xxvii) ASOF II Frontier Holdings 4 owns 68,237 shares of Common Stock, (xxviii) ASOF II Frontier Holdings 5 owns 67,581 shares of Common Stock, (xxix) ASOF II Frontier Holdings 6 owns 71,619 shares of Common Stock, (xxx) ASOF II Frontier Holdings 7 owns 71,797 shares of Common Stock, (xxxi) ASOF II A (DE) Frontier Holdings 1 owns 314,164 shares of Common Stock; (xxxii) ASOF II A (DE) Frontier Holdings 2 owns 11,560 shares of Common Stock; (xxxiii) ASSF IV AIV B Holdings III owns 2,694,243 shares of Common Stock and (xxxiv) ASSF IV AIV B directly or indirectly owns 5,348,289 shares of Common Stock.

F10 · ownership.nature: Ares Partners is the sole member of each of Ares Voting and Ares Management GP, which are respectively the holders of the Class B and Class C common stock of Ares Management, which common stock allows them, collectively, to generally have the majority of the votes on any matter submitted to the stockholders of Ares Management if certain conditions are met. Ares Management is the sole member of Ares Holdco, which is the general partner of Ares Management Holdings, which is the sole member of Ares Management LLC, which is: (a) the sole member of ACOF Investment Management, which is the manager of the ACOF Funds, (b) the sole member of ASOF Investment Management, which is the manager of the ASOF Funds, and (c) the general partner of ASSF Operating Manager IV, which is the manager of the ASSF Funds.

F11 · ownership.nature: Ares Partners is managed by a board of managers, which is composed of Michael J Arougheti, Ryan Berry, R. Kipp deVeer, David B. Kaplan, Antony P. Ressler and Bennett Rosenthal (collectively, the "Board Members"). Mr. Ressler generally has veto authority over Board Members' decisions.

F12 · ownership.nature: Each of the Reporting Persons, and the Board Members, and the other directors, officers, partners, stockholders, members and managers of the Reporting Persons, expressly disclaims beneficial ownership of the Common Stock, except to the extent of any pecuniary interest therein, and this Form 4 shall not be deemed an admission that any such person or entity is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purposes.

SEC source: 0001104659-23-048962 · tm2313493-1_4seq1.xml · nonDerivative · entry 1

ARES MANAGEMENT LLC · CIK 0001259313 · 10% owner

ACOF VI Frontier AIV A1, L.P. · CIK 0001862494 · 10% owner

ACOF VI Frontier AIV A2, L.P. · CIK 0001862499 · 10% owner

ACOF VI Frontier AIV A3, L.P. · CIK 0001862534 · 10% owner

ACOF VI Frontier AIV A4, L.P. · CIK 0001862529 · 10% owner

ACOF VI Frontier AIV A5, L.P. · CIK 0001862526 · 10% owner

ACOF VI Frontier AIV A6, L.P. · CIK 0001862483 · 10% owner

ACOF VI Frontier AIV A7, L.P. · CIK 0001862482 · 10% owner

ACOF VI Frontier AIV A8, L.P. · CIK 0001862505 · 10% owner

ACOF VI Frontier AIV A9, L.P. · CIK 0001862533 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnotes

Disclosed balance after: 37,494,654

F1 · balance_after: This statement is being filed by ACOF VI Frontier AIV A1, L.P. ("ACOF VI Frontier AIV A1"), ACOF VI Frontier AIV A2, L.P. ("ACOF VI Frontier AIV A2"), ACOF VI Frontier AIV A3, L.P. ("ACOF VI Frontier AIV A3"), ACOF VI Frontier AIV A4, L.P. ("ACOF VI Frontier AIV A4"), ACOF VI Frontier AIV A5, L.P. ("ACOF VI Frontier AIV A5"), ACOF VI Frontier AIV A6, L.P. ("ACOF VI Frontier AIV A6"), ACOF VI Frontier AIV A7, L.P. ("ACOF VI Frontier AIV A7"), ACOF VI Frontier AIV A8, L.P. ("ACOF VI Frontier AIV A8"), ACOF VI Frontier AIV A9, L.P. ("ACOF VI Frontier AIV A9"), ACOF VI Frontier AIV A10, L.P. ("ACOF VI Frontier AIV A10"), and ACOF VI Frontier AIV B1, L.P. ("ACOF VI Frontier AIV B1", together with the foregoing entities, the "ACOF Funds"), (continued in next footnote)

F2 · balance_after: ASOF Frontier AIV A1, L.P. ("ASOF Frontier AIV A1"), ASOF Frontier AIV A2, L.P. ("ASOF Frontier AIV A2"), ASOF Frontier AIV A3, L.P. ("ASOF Frontier AIV A3"), ASOF Frontier AIV A4, L.P. ("ASOF Frontier AIV A4"), ASOF Frontier AIV A5, L.P. ("ASOF Frontier AIV A5"), ASOF Frontier AIV A6, L.P. ("ASOF Frontier AIV A6"), ASOF Frontier AIV A7, L.P. ("ASOF Frontier AIV A7"), ASOF Frontier AIV A8, L.P. ("ASOF Frontier AIV A8"), ASOF Frontier AIV A9, L.P. ("ASOF Frontier AIV A9"), ASOF Frontier AIV A10, L.P. ("ASOF Frontier AIV A10"), ASOF Frontier AIV A11, L.P. ("ASOF Frontier AIV A11"), ASOF Frontier AIV B1, L.P. ("ASOF Frontier AIV B1"), (continued in next footnote)

F3 · balance_after: ASOF II Frontier Holdings 1 L.P. ("ASOF II Frontier Holdings 1"), ASOF II Frontier Holdings 2 L.P. ("ASOF II Frontier Holdings 2"), ASOF II Frontier Holdings 3 L.P. ("ASOF II Frontier Holdings 3"), ASOF II Frontier Holdings 4 L.P. ("ASOF II Frontier Holdings 4"), ASOF II Frontier Holdings 5 L.P. ("ASOF II Frontier Holdings 5"), ASOF II Frontier Holdings 6 L.P. ("ASOF II Frontier Holdings 6"), (continued in next footnote)

F4 · balance_after: ASOF II Frontier Holdings 7 L.P. ("ASOF II Frontier Holdings 7"), ASOF II A (DE) Frontier Holdings 1 L.P. ("ASOF II A (DE) Frontier Holdings 1") and ASOF II A (DE) Frontier Holdings 2 L.P. ("ASOF II A (DE) Frontier Holdings 2", and together with ASOF Frontier AIV A1, ASOF Frontier AIV A2, ASOF Frontier AIV A3, ASOF Frontier AIV A4, ASOF Frontier AIV A5, ASOF Frontier AIV A6, ASOF Frontier AIV A7, ASOF Frontier AIV A8, ASOF Frontier AIV A9, ASOF Frontier AIV A10, and ASOF Frontier AIV A11, ASOF II Frontier Holdings 1, ASOF II Frontier Holdings 2, ASOF II Frontier Holdings 3, ASOF II Frontier Holdings 4, ASOF II Frontier Holdings 5, ASOF II Frontier Holdings 6, ASOF II Frontier Holdings 7 and ASOF II A (DE) Frontier Holdings 1, the "ASOF Funds"), (continued in next footnote)

F5 · balance_after: ASSF IV AIV B Holdings III, L.P. ("ASSF IV AIV B Holdings III"), ASSF IV AIV B, L.P. ("ASSF IV AIV B", and together with ASSF IV AIV B Holdings III, the "ASSF Funds"), ACOF Investment Management LLC ("ACOF Investment Management"), ASOF Investment Management LLC ("ASOF Investment Management"), ASSF Operating Manager IV, L.P. ("ASSF Operating Manager IV"), (continued in next footnote)

F6 · balance_after: Ares Management LLC, Ares Management Holdings L.P. ("Ares Management Holdings"), Ares Holdco LLC ("Ares Holdco"), Ares Management Corporation ("Ares Management"), Ares Management GP LLC ("Ares Management GP"), Ares Voting LLC ("Ares Voting") and Ares Partners Holdco LLC ("Ares Partners", and together with the ACOF Funds, the ASOF Funds, the ASSF Funds, ACOF Investment Management, ASOF Investment Management, ASSF Operating Manager IV, Ares Management LLC, Ares Management Holdings, Ares Holdco, Ares Management, Ares Management GP, and Ares Voting, the "Reporting Persons"). Due to the electronic system's limitation of 10 Reporting Persons per joint filing, this statement is being filed in five parts.

F7 · balance_after: The Reporting Persons collectively beneficially own, or may be deemed to beneficially own, in the aggregate 37,494,654 shares of Common Stock by reason of the direct or indirect beneficial ownership of such shares as follows: (i) ACOF VI Frontier AIV A1 owns 256,061 shares of Common Stock; (ii) ACOF VI Frontier AIV A2 owns 91,824 shares of Common Stock; (iii) ACOF VI Frontier AIV A3 owns 21,425 shares of Common Stock; (iv) ACOF VI Frontier AIV A4 owns 278,536 shares of Common Stock; (v) ACOF VI Frontier AIV A5 owns 306,083 shares of Common Stock; (vi) ACOF VI Frontier AIV A6 owns 171,407 shares of Common Stock; (vii) ACOF VI Frontier AIV A7 owns 310,196 shares of Common Stock; (viii) ACOF VI Frontier AIV A8 owns shares 311,593 of Common Stock; (ix) ACOF VI Frontier AIV A9 owns 292,616 shares of Common Stock; (x) ACOF VI Frontier AIV A10 owns 92,529 shares of Common Stock; (xi) ACOF VI Frontier AIV B1 owns 15,445,513 shares of Common Stock; (continued in next footnote)

F8 · balance_after: (xii) ASOF Frontier AIV A1 owns 105,592 shares of Common Stock; (xiii) ASOF Frontier AIV A2 owns 18,032 shares of Common Stock; (xiv) ASOF Frontier AIV A3 owns 830,837 shares of Common Stock; (xv) ASOF Frontier AIV A4 owns 281,844 shares of Common Stock; (xvi) ASOF Frontier AIV A5 owns 167,160 shares of Common Stock; (xvii) ASOF Frontier AIV A6 owns 292,124 shares of Common Stock; (xviii) ASOF Frontier AIV A7 owns 289,417 shares of Common Stock; (xix) ASOF Frontier AIV A8 owns 238,026 shares of Common Stock; (xx) ASOF Frontier AIV A9 owns 360,644 shares of Common Stock; (xxi) ASOF Frontier AIV A10 owns 259,665 shares of Common Stock; (xxii) ASOF Frontier AIV A11 owns 245,236 shares of Common Stock; (xxiii) ASOF Frontier AIV B1 owns 9,597,579 shares of Common Stock; (continued in next footnote)

F9 · balance_after: (xxiv) ASOF II Frontier Holdings 1 owns 1,189,917 shares of Common Stock, (xxv) ASOF II Frontier Holdings 2 owns 57,353 shares of Common Stock, (xxvi) ASOF II Frontier Holdings 3 owns 63,879 shares of Common Stock, (xxvii) ASOF II Frontier Holdings 4 owns 61,912 shares of Common Stock, (xxviii) ASOF II Frontier Holdings 5 owns 61,318 shares of Common Stock, (xxix) ASOF II Frontier Holdings 6 owns 64,981 shares of Common Stock, (xxx) ASOF II Frontier Holdings 7 owns 65,143 shares of Common Stock, (xxxi) ASOF II A (DE) Frontier Holdings 1 owns 285,047 shares of Common Stock; (xxxii) ASOF II A (DE) Frontier Holdings 2 owns 10,489 shares of Common Stock; (xxxiii) ASSF IV AIV B Holdings III owns 2,694,243 shares of Common Stock and (xxxiv) ASSF IV AIV B directly or indirectly owns 5,348,289 shares of Common Stock.

F10 · balance_after: Ares Partners is the sole member of each of Ares Voting and Ares Management GP, which are respectively the holders of the Class B and Class C common stock of Ares Management, which common stock allows them, collectively, to generally have the majority of the votes on any matter submitted to the stockholders of Ares Management if certain conditions are met. Ares Management is the sole member of Ares Holdco, which is the general partner of Ares Management Holdings, which is the sole member of Ares Management LLC, which is: (a) the sole member of ACOF Investment Management, which is the manager of the ACOF Funds, (b) the sole member of ASOF Investment Management, which is the manager of the ASOF Funds, and (c) the general partner of ASSF Operating Manager IV, which is the manager of the ASSF Funds.

F11 · balance_after: Ares Partners is managed by a board of managers, which is composed of Michael J Arougheti, Ryan Berry, R. Kipp deVeer, David B. Kaplan, Antony P. Ressler and Bennett Rosenthal (collectively, the "Board Members"). Mr. Ressler generally has veto authority over Board Members' decisions.

F12 · balance_after: Each of the Reporting Persons, and the Board Members, and the other directors, officers, partners, stockholders, members and managers of the Reporting Persons, expressly disclaims beneficial ownership of the Common Stock, except to the extent of any pecuniary interest therein, and this Form 4 shall not be deemed an admission that any such person or entity is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purposes.

F1 · ownership.nature: This statement is being filed by ACOF VI Frontier AIV A1, L.P. ("ACOF VI Frontier AIV A1"), ACOF VI Frontier AIV A2, L.P. ("ACOF VI Frontier AIV A2"), ACOF VI Frontier AIV A3, L.P. ("ACOF VI Frontier AIV A3"), ACOF VI Frontier AIV A4, L.P. ("ACOF VI Frontier AIV A4"), ACOF VI Frontier AIV A5, L.P. ("ACOF VI Frontier AIV A5"), ACOF VI Frontier AIV A6, L.P. ("ACOF VI Frontier AIV A6"), ACOF VI Frontier AIV A7, L.P. ("ACOF VI Frontier AIV A7"), ACOF VI Frontier AIV A8, L.P. ("ACOF VI Frontier AIV A8"), ACOF VI Frontier AIV A9, L.P. ("ACOF VI Frontier AIV A9"), ACOF VI Frontier AIV A10, L.P. ("ACOF VI Frontier AIV A10"), and ACOF VI Frontier AIV B1, L.P. ("ACOF VI Frontier AIV B1", together with the foregoing entities, the "ACOF Funds"), (continued in next footnote)

F2 · ownership.nature: ASOF Frontier AIV A1, L.P. ("ASOF Frontier AIV A1"), ASOF Frontier AIV A2, L.P. ("ASOF Frontier AIV A2"), ASOF Frontier AIV A3, L.P. ("ASOF Frontier AIV A3"), ASOF Frontier AIV A4, L.P. ("ASOF Frontier AIV A4"), ASOF Frontier AIV A5, L.P. ("ASOF Frontier AIV A5"), ASOF Frontier AIV A6, L.P. ("ASOF Frontier AIV A6"), ASOF Frontier AIV A7, L.P. ("ASOF Frontier AIV A7"), ASOF Frontier AIV A8, L.P. ("ASOF Frontier AIV A8"), ASOF Frontier AIV A9, L.P. ("ASOF Frontier AIV A9"), ASOF Frontier AIV A10, L.P. ("ASOF Frontier AIV A10"), ASOF Frontier AIV A11, L.P. ("ASOF Frontier AIV A11"), ASOF Frontier AIV B1, L.P. ("ASOF Frontier AIV B1"), (continued in next footnote)

F3 · ownership.nature: ASOF II Frontier Holdings 1 L.P. ("ASOF II Frontier Holdings 1"), ASOF II Frontier Holdings 2 L.P. ("ASOF II Frontier Holdings 2"), ASOF II Frontier Holdings 3 L.P. ("ASOF II Frontier Holdings 3"), ASOF II Frontier Holdings 4 L.P. ("ASOF II Frontier Holdings 4"), ASOF II Frontier Holdings 5 L.P. ("ASOF II Frontier Holdings 5"), ASOF II Frontier Holdings 6 L.P. ("ASOF II Frontier Holdings 6"), (continued in next footnote)

F4 · ownership.nature: ASOF II Frontier Holdings 7 L.P. ("ASOF II Frontier Holdings 7"), ASOF II A (DE) Frontier Holdings 1 L.P. ("ASOF II A (DE) Frontier Holdings 1") and ASOF II A (DE) Frontier Holdings 2 L.P. ("ASOF II A (DE) Frontier Holdings 2", and together with ASOF Frontier AIV A1, ASOF Frontier AIV A2, ASOF Frontier AIV A3, ASOF Frontier AIV A4, ASOF Frontier AIV A5, ASOF Frontier AIV A6, ASOF Frontier AIV A7, ASOF Frontier AIV A8, ASOF Frontier AIV A9, ASOF Frontier AIV A10, and ASOF Frontier AIV A11, ASOF II Frontier Holdings 1, ASOF II Frontier Holdings 2, ASOF II Frontier Holdings 3, ASOF II Frontier Holdings 4, ASOF II Frontier Holdings 5, ASOF II Frontier Holdings 6, ASOF II Frontier Holdings 7 and ASOF II A (DE) Frontier Holdings 1, the "ASOF Funds"), (continued in next footnote)

F5 · ownership.nature: ASSF IV AIV B Holdings III, L.P. ("ASSF IV AIV B Holdings III"), ASSF IV AIV B, L.P. ("ASSF IV AIV B", and together with ASSF IV AIV B Holdings III, the "ASSF Funds"), ACOF Investment Management LLC ("ACOF Investment Management"), ASOF Investment Management LLC ("ASOF Investment Management"), ASSF Operating Manager IV, L.P. ("ASSF Operating Manager IV"), (continued in next footnote)

F6 · ownership.nature: Ares Management LLC, Ares Management Holdings L.P. ("Ares Management Holdings"), Ares Holdco LLC ("Ares Holdco"), Ares Management Corporation ("Ares Management"), Ares Management GP LLC ("Ares Management GP"), Ares Voting LLC ("Ares Voting") and Ares Partners Holdco LLC ("Ares Partners", and together with the ACOF Funds, the ASOF Funds, the ASSF Funds, ACOF Investment Management, ASOF Investment Management, ASSF Operating Manager IV, Ares Management LLC, Ares Management Holdings, Ares Holdco, Ares Management, Ares Management GP, and Ares Voting, the "Reporting Persons"). Due to the electronic system's limitation of 10 Reporting Persons per joint filing, this statement is being filed in five parts.

F7 · ownership.nature: The Reporting Persons collectively beneficially own, or may be deemed to beneficially own, in the aggregate 37,494,654 shares of Common Stock by reason of the direct or indirect beneficial ownership of such shares as follows: (i) ACOF VI Frontier AIV A1 owns 256,061 shares of Common Stock; (ii) ACOF VI Frontier AIV A2 owns 91,824 shares of Common Stock; (iii) ACOF VI Frontier AIV A3 owns 21,425 shares of Common Stock; (iv) ACOF VI Frontier AIV A4 owns 278,536 shares of Common Stock; (v) ACOF VI Frontier AIV A5 owns 306,083 shares of Common Stock; (vi) ACOF VI Frontier AIV A6 owns 171,407 shares of Common Stock; (vii) ACOF VI Frontier AIV A7 owns 310,196 shares of Common Stock; (viii) ACOF VI Frontier AIV A8 owns shares 311,593 of Common Stock; (ix) ACOF VI Frontier AIV A9 owns 292,616 shares of Common Stock; (x) ACOF VI Frontier AIV A10 owns 92,529 shares of Common Stock; (xi) ACOF VI Frontier AIV B1 owns 15,445,513 shares of Common Stock; (continued in next footnote)

F8 · ownership.nature: (xii) ASOF Frontier AIV A1 owns 105,592 shares of Common Stock; (xiii) ASOF Frontier AIV A2 owns 18,032 shares of Common Stock; (xiv) ASOF Frontier AIV A3 owns 830,837 shares of Common Stock; (xv) ASOF Frontier AIV A4 owns 281,844 shares of Common Stock; (xvi) ASOF Frontier AIV A5 owns 167,160 shares of Common Stock; (xvii) ASOF Frontier AIV A6 owns 292,124 shares of Common Stock; (xviii) ASOF Frontier AIV A7 owns 289,417 shares of Common Stock; (xix) ASOF Frontier AIV A8 owns 238,026 shares of Common Stock; (xx) ASOF Frontier AIV A9 owns 360,644 shares of Common Stock; (xxi) ASOF Frontier AIV A10 owns 259,665 shares of Common Stock; (xxii) ASOF Frontier AIV A11 owns 245,236 shares of Common Stock; (xxiii) ASOF Frontier AIV B1 owns 9,597,579 shares of Common Stock; (continued in next footnote)

F9 · ownership.nature: (xxiv) ASOF II Frontier Holdings 1 owns 1,189,917 shares of Common Stock, (xxv) ASOF II Frontier Holdings 2 owns 57,353 shares of Common Stock, (xxvi) ASOF II Frontier Holdings 3 owns 63,879 shares of Common Stock, (xxvii) ASOF II Frontier Holdings 4 owns 61,912 shares of Common Stock, (xxviii) ASOF II Frontier Holdings 5 owns 61,318 shares of Common Stock, (xxix) ASOF II Frontier Holdings 6 owns 64,981 shares of Common Stock, (xxx) ASOF II Frontier Holdings 7 owns 65,143 shares of Common Stock, (xxxi) ASOF II A (DE) Frontier Holdings 1 owns 285,047 shares of Common Stock; (xxxii) ASOF II A (DE) Frontier Holdings 2 owns 10,489 shares of Common Stock; (xxxiii) ASSF IV AIV B Holdings III owns 2,694,243 shares of Common Stock and (xxxiv) ASSF IV AIV B directly or indirectly owns 5,348,289 shares of Common Stock.

F10 · ownership.nature: Ares Partners is the sole member of each of Ares Voting and Ares Management GP, which are respectively the holders of the Class B and Class C common stock of Ares Management, which common stock allows them, collectively, to generally have the majority of the votes on any matter submitted to the stockholders of Ares Management if certain conditions are met. Ares Management is the sole member of Ares Holdco, which is the general partner of Ares Management Holdings, which is the sole member of Ares Management LLC, which is: (a) the sole member of ACOF Investment Management, which is the manager of the ACOF Funds, (b) the sole member of ASOF Investment Management, which is the manager of the ASOF Funds, and (c) the general partner of ASSF Operating Manager IV, which is the manager of the ASSF Funds.

F11 · ownership.nature: Ares Partners is managed by a board of managers, which is composed of Michael J Arougheti, Ryan Berry, R. Kipp deVeer, David B. Kaplan, Antony P. Ressler and Bennett Rosenthal (collectively, the "Board Members"). Mr. Ressler generally has veto authority over Board Members' decisions.

F12 · ownership.nature: Each of the Reporting Persons, and the Board Members, and the other directors, officers, partners, stockholders, members and managers of the Reporting Persons, expressly disclaims beneficial ownership of the Common Stock, except to the extent of any pecuniary interest therein, and this Form 4 shall not be deemed an admission that any such person or entity is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purposes.

SEC source: 0001104659-23-046857 · tm2313099-1_4seq1.xml · nonDerivative · entry 1

ARES MANAGEMENT LLC · CIK 0001259313 · 10% owner

ACOF VI Frontier AIV A1, L.P. · CIK 0001862494 · 10% owner

ACOF VI Frontier AIV A2, L.P. · CIK 0001862499 · 10% owner

ACOF VI Frontier AIV A3, L.P. · CIK 0001862534 · 10% owner

ACOF VI Frontier AIV A4, L.P. · CIK 0001862529 · 10% owner

ACOF VI Frontier AIV A5, L.P. · CIK 0001862526 · 10% owner

ACOF VI Frontier AIV A6, L.P. · CIK 0001862483 · 10% owner

ACOF VI Frontier AIV A7, L.P. · CIK 0001862482 · 10% owner

ACOF VI Frontier AIV A8, L.P. · CIK 0001862505 · 10% owner

ACOF VI Frontier AIV A9, L.P. · CIK 0001862533 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnotes

Disclosed balance after: 37,294,654

F1 · balance_after: This statement is being filed by ACOF VI Frontier AIV A1, L.P. ("ACOF VI Frontier AIV A1"), ACOF VI Frontier AIV A2, L.P. ("ACOF VI Frontier AIV A2"), ACOF VI Frontier AIV A3, L.P. ("ACOF VI Frontier AIV A3"), ACOF VI Frontier AIV A4, L.P. ("ACOF VI Frontier AIV A4"), ACOF VI Frontier AIV A5, L.P. ("ACOF VI Frontier AIV A5"), ACOF VI Frontier AIV A6, L.P. ("ACOF VI Frontier AIV A6"), ACOF VI Frontier AIV A7, L.P. ("ACOF VI Frontier AIV A7"), ACOF VI Frontier AIV A8, L.P. ("ACOF VI Frontier AIV A8"), ACOF VI Frontier AIV A9, L.P. ("ACOF VI Frontier AIV A9"), ACOF VI Frontier AIV A10, L.P. ("ACOF VI Frontier AIV A10"), and ACOF VI Frontier AIV B1, L.P. ("ACOF VI Frontier AIV B1", together with the foregoing entities, the "ACOF Funds"), (continued in next footnote)

F2 · balance_after: ASOF Frontier AIV A1, L.P. ("ASOF Frontier AIV A1"), ASOF Frontier AIV A2, L.P. ("ASOF Frontier AIV A2"), ASOF Frontier AIV A3, L.P. ("ASOF Frontier AIV A3"), ASOF Frontier AIV A4, L.P. ("ASOF Frontier AIV A4"), ASOF Frontier AIV A5, L.P. ("ASOF Frontier AIV A5"), ASOF Frontier AIV A6, L.P. ("ASOF Frontier AIV A6"), ASOF Frontier AIV A7, L.P. ("ASOF Frontier AIV A7"), ASOF Frontier AIV A8, L.P. ("ASOF Frontier AIV A8"), ASOF Frontier AIV A9, L.P. ("ASOF Frontier AIV A9"), ASOF Frontier AIV A10, L.P. ("ASOF Frontier AIV A10"), ASOF Frontier AIV A11, L.P. ("ASOF Frontier AIV A11"), ASOF Frontier AIV B1, L.P. ("ASOF Frontier AIV B1"), (continued in next footnote)

F3 · balance_after: ASOF II Frontier Holdings 1 L.P. ("ASOF II Frontier Holdings 1"), ASOF II Frontier Holdings 2 L.P. ("ASOF II Frontier Holdings 2"), ASOF II Frontier Holdings 3 L.P. ("ASOF II Frontier Holdings 3"), ASOF II Frontier Holdings 4 L.P. ("ASOF II Frontier Holdings 4"), ASOF II Frontier Holdings 5 L.P. ("ASOF II Frontier Holdings 5"), ASOF II Frontier Holdings 6 L.P. ("ASOF II Frontier Holdings 6"), (continued in next footnote)

F4 · balance_after: ASOF II Frontier Holdings 7 L.P. ("ASOF II Frontier Holdings 7"), ASOF II A (DE) Frontier Holdings 1 L.P. ("ASOF II A (DE) Frontier Holdings 1") and ASOF II A (DE) Frontier Holdings 2 L.P. ("ASOF II A (DE) Frontier Holdings 2", and together with ASOF Frontier AIV A1, ASOF Frontier AIV A2, ASOF Frontier AIV A3, ASOF Frontier AIV A4, ASOF Frontier AIV A5, ASOF Frontier AIV A6, ASOF Frontier AIV A7, ASOF Frontier AIV A8, ASOF Frontier AIV A9, ASOF Frontier AIV A10, and ASOF Frontier AIV A11, ASOF II Frontier Holdings 1, ASOF II Frontier Holdings 2, ASOF II Frontier Holdings 3, ASOF II Frontier Holdings 4, ASOF II Frontier Holdings 5, ASOF II Frontier Holdings 6, ASOF II Frontier Holdings 7 and ASOF II A (DE) Frontier Holdings 1, the "ASOF Funds"), (continued in next footnote)

F5 · balance_after: ASSF IV AIV B Holdings III, L.P. ("ASSF IV AIV B Holdings III"), ASSF IV AIV B, L.P. ("ASSF IV AIV B", and together with ASSF IV AIV B Holdings III, the "ASSF Funds"), ACOF Investment Management LLC ("ACOF Investment Management"), ASOF Investment Management LLC ("ASOF Investment Management"), ASSF Operating Manager IV, L.P. ("ASSF Operating Manager IV"), (continued in next footnote)

F6 · balance_after: Ares Management LLC, Ares Management Holdings L.P. ("Ares Management Holdings"), Ares Holdco LLC ("Ares Holdco"), Ares Management Corporation ("Ares Management"), Ares Management GP LLC ("Ares Management GP"), Ares Voting LLC ("Ares Voting") and Ares Partners Holdco LLC ("Ares Partners", and together with the ACOF Funds, the ASOF Funds, the ASSF Funds, ACOF Investment Management, ASOF Investment Management, ASSF Operating Manager IV, Ares Management LLC, Ares Management Holdings, Ares Holdco, Ares Management, Ares Management GP, and Ares Voting, the "Reporting Persons"). Due to the electronic system's limitation of 10 Reporting Persons per joint filing, this statement is being filed in five parts.

F7 · balance_after: The Reporting Persons collectively beneficially own, or may be deemed to beneficially own, in the aggregate 37,294,654 shares of Common Stock by reason of the direct or indirect beneficial ownership of such shares as follows: (i) ACOF VI Frontier AIV A1 owns 255,362 shares of Common Stock; (ii) ACOF VI Frontier AIV A2 owns 91,574 shares of Common Stock; (iii) ACOF VI Frontier AIV A3 owns 21,367 shares of Common Stock; (iv) ACOF VI Frontier AIV A4 owns 277,775 shares of Common Stock; (v) ACOF VI Frontier AIV A5 owns 305,247 shares of Common Stock; (vi) ACOF VI Frontier AIV A6 owns 170,939 shares of Common Stock; (vii) ACOF VI Frontier AIV A7 owns 309,349 shares of Common Stock; (viii) ACOF VI Frontier AIV A8 owns shares 310,742 of Common Stock; (ix) ACOF VI Frontier AIV A9 owns 291,817 shares of Common Stock; (x) ACOF VI Frontier AIV A10 owns 92,277 shares of Common Stock; (xi) ACOF VI Frontier AIV B1 owns 15,403,335 shares of Common Stock; (continued in next footnote)

F8 · balance_after: (xii) ASOF Frontier AIV A1 owns 105,592 shares of Common Stock; (xiii) ASOF Frontier AIV A2 owns 18,032 shares of Common Stock; (xiv) ASOF Frontier AIV A3 owns 830,837 shares of Common Stock; (xv) ASOF Frontier AIV A4 owns 281,844 shares of Common Stock; (xvi) ASOF Frontier AIV A5 owns 167,160 shares of Common Stock; (xvii) ASOF Frontier AIV A6 owns 292,124 shares of Common Stock; (xviii) ASOF Frontier AIV A7 owns 289,417 shares of Common Stock; (xix) ASOF Frontier AIV A8 owns 238,026 shares of Common Stock; (xx) ASOF Frontier AIV A9 owns 360,644 shares of Common Stock; (xxi) ASOF Frontier AIV A10 owns 259,665 shares of Common Stock; (xxii) ASOF Frontier AIV A11 owns 245,236 shares of Common Stock; (xxiii) ASOF Frontier AIV B1 owns 9,597,579 shares of Common Stock; (continued in next footnote)

F9 · balance_after: (xxiv) ASOF II Frontier Holdings 1 owns 1,092,678 shares of Common Stock, (xxv) ASOF II Frontier Holdings 2 owns 52,666 shares of Common Stock, (xxvi) ASOF II Frontier Holdings 3 owns 58,659 shares of Common Stock, (xxvii) ASOF II Frontier Holdings 4 owns 56,853 shares of Common Stock, (xxviii) ASOF II Frontier Holdings 5 owns 56,307 shares of Common Stock, (xxix) ASOF II Frontier Holdings 6 owns 59,671 shares of Common Stock, (xxx) ASOF II Frontier Holdings 7 owns 59,820 shares of Common Stock, (xxxi) ASOF II A (DE) Frontier Holdings 1 owns 261,753 shares of Common Stock; (xxxii) ASOF II A (DE) Frontier Holdings 2 owns 9,631 shares of Common Stock; (xxxiii) ASSF IV AIV B Holdings III owns 2,694,243 shares of Common Stock and (xxxiv) ASSF IV AIV B directly or indirectly owns 5,348,289 shares of Common Stock.

F10 · balance_after: Ares Partners is the sole member of each of Ares Voting and Ares Management GP, which are respectively the holders of the Class B and Class C common stock of Ares Management, which common stock allows them, collectively, to generally have the majority of the votes on any matter submitted to the stockholders of Ares Management if certain conditions are met. Ares Management is the sole member of Ares Holdco, which is the general partner of Ares Management Holdings, which is the sole member of Ares Management LLC, which is: (a) the sole member of ACOF Investment Management, which is the manager of the ACOF Funds, (b) the sole member of ASOF Investment Management, which is the manager of the ASOF Funds, and (c) the general partner of ASSF Operating Manager IV, which is the manager of the ASSF Funds.

F11 · balance_after: Ares Partners is managed by a board of managers, which is composed of Michael J Arougheti, Ryan Berry, R. Kipp deVeer, David B. Kaplan, Antony P. Ressler and Bennett Rosenthal (collectively, the "Board Members"). Mr. Ressler generally has veto authority over Board Members' decisions.

F12 · balance_after: Each of the Reporting Persons, and the Board Members, and the other directors, officers, partners, stockholders, members and managers of the Reporting Persons, expressly disclaims beneficial ownership of the Common Stock, except to the extent of any pecuniary interest therein, and this Form 4 shall not be deemed an admission that any such person or entity is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purposes.

F1 · ownership.nature: This statement is being filed by ACOF VI Frontier AIV A1, L.P. ("ACOF VI Frontier AIV A1"), ACOF VI Frontier AIV A2, L.P. ("ACOF VI Frontier AIV A2"), ACOF VI Frontier AIV A3, L.P. ("ACOF VI Frontier AIV A3"), ACOF VI Frontier AIV A4, L.P. ("ACOF VI Frontier AIV A4"), ACOF VI Frontier AIV A5, L.P. ("ACOF VI Frontier AIV A5"), ACOF VI Frontier AIV A6, L.P. ("ACOF VI Frontier AIV A6"), ACOF VI Frontier AIV A7, L.P. ("ACOF VI Frontier AIV A7"), ACOF VI Frontier AIV A8, L.P. ("ACOF VI Frontier AIV A8"), ACOF VI Frontier AIV A9, L.P. ("ACOF VI Frontier AIV A9"), ACOF VI Frontier AIV A10, L.P. ("ACOF VI Frontier AIV A10"), and ACOF VI Frontier AIV B1, L.P. ("ACOF VI Frontier AIV B1", together with the foregoing entities, the "ACOF Funds"), (continued in next footnote)

F2 · ownership.nature: ASOF Frontier AIV A1, L.P. ("ASOF Frontier AIV A1"), ASOF Frontier AIV A2, L.P. ("ASOF Frontier AIV A2"), ASOF Frontier AIV A3, L.P. ("ASOF Frontier AIV A3"), ASOF Frontier AIV A4, L.P. ("ASOF Frontier AIV A4"), ASOF Frontier AIV A5, L.P. ("ASOF Frontier AIV A5"), ASOF Frontier AIV A6, L.P. ("ASOF Frontier AIV A6"), ASOF Frontier AIV A7, L.P. ("ASOF Frontier AIV A7"), ASOF Frontier AIV A8, L.P. ("ASOF Frontier AIV A8"), ASOF Frontier AIV A9, L.P. ("ASOF Frontier AIV A9"), ASOF Frontier AIV A10, L.P. ("ASOF Frontier AIV A10"), ASOF Frontier AIV A11, L.P. ("ASOF Frontier AIV A11"), ASOF Frontier AIV B1, L.P. ("ASOF Frontier AIV B1"), (continued in next footnote)

F3 · ownership.nature: ASOF II Frontier Holdings 1 L.P. ("ASOF II Frontier Holdings 1"), ASOF II Frontier Holdings 2 L.P. ("ASOF II Frontier Holdings 2"), ASOF II Frontier Holdings 3 L.P. ("ASOF II Frontier Holdings 3"), ASOF II Frontier Holdings 4 L.P. ("ASOF II Frontier Holdings 4"), ASOF II Frontier Holdings 5 L.P. ("ASOF II Frontier Holdings 5"), ASOF II Frontier Holdings 6 L.P. ("ASOF II Frontier Holdings 6"), (continued in next footnote)

F4 · ownership.nature: ASOF II Frontier Holdings 7 L.P. ("ASOF II Frontier Holdings 7"), ASOF II A (DE) Frontier Holdings 1 L.P. ("ASOF II A (DE) Frontier Holdings 1") and ASOF II A (DE) Frontier Holdings 2 L.P. ("ASOF II A (DE) Frontier Holdings 2", and together with ASOF Frontier AIV A1, ASOF Frontier AIV A2, ASOF Frontier AIV A3, ASOF Frontier AIV A4, ASOF Frontier AIV A5, ASOF Frontier AIV A6, ASOF Frontier AIV A7, ASOF Frontier AIV A8, ASOF Frontier AIV A9, ASOF Frontier AIV A10, and ASOF Frontier AIV A11, ASOF II Frontier Holdings 1, ASOF II Frontier Holdings 2, ASOF II Frontier Holdings 3, ASOF II Frontier Holdings 4, ASOF II Frontier Holdings 5, ASOF II Frontier Holdings 6, ASOF II Frontier Holdings 7 and ASOF II A (DE) Frontier Holdings 1, the "ASOF Funds"), (continued in next footnote)

F5 · ownership.nature: ASSF IV AIV B Holdings III, L.P. ("ASSF IV AIV B Holdings III"), ASSF IV AIV B, L.P. ("ASSF IV AIV B", and together with ASSF IV AIV B Holdings III, the "ASSF Funds"), ACOF Investment Management LLC ("ACOF Investment Management"), ASOF Investment Management LLC ("ASOF Investment Management"), ASSF Operating Manager IV, L.P. ("ASSF Operating Manager IV"), (continued in next footnote)

F6 · ownership.nature: Ares Management LLC, Ares Management Holdings L.P. ("Ares Management Holdings"), Ares Holdco LLC ("Ares Holdco"), Ares Management Corporation ("Ares Management"), Ares Management GP LLC ("Ares Management GP"), Ares Voting LLC ("Ares Voting") and Ares Partners Holdco LLC ("Ares Partners", and together with the ACOF Funds, the ASOF Funds, the ASSF Funds, ACOF Investment Management, ASOF Investment Management, ASSF Operating Manager IV, Ares Management LLC, Ares Management Holdings, Ares Holdco, Ares Management, Ares Management GP, and Ares Voting, the "Reporting Persons"). Due to the electronic system's limitation of 10 Reporting Persons per joint filing, this statement is being filed in five parts.

F7 · ownership.nature: The Reporting Persons collectively beneficially own, or may be deemed to beneficially own, in the aggregate 37,294,654 shares of Common Stock by reason of the direct or indirect beneficial ownership of such shares as follows: (i) ACOF VI Frontier AIV A1 owns 255,362 shares of Common Stock; (ii) ACOF VI Frontier AIV A2 owns 91,574 shares of Common Stock; (iii) ACOF VI Frontier AIV A3 owns 21,367 shares of Common Stock; (iv) ACOF VI Frontier AIV A4 owns 277,775 shares of Common Stock; (v) ACOF VI Frontier AIV A5 owns 305,247 shares of Common Stock; (vi) ACOF VI Frontier AIV A6 owns 170,939 shares of Common Stock; (vii) ACOF VI Frontier AIV A7 owns 309,349 shares of Common Stock; (viii) ACOF VI Frontier AIV A8 owns shares 310,742 of Common Stock; (ix) ACOF VI Frontier AIV A9 owns 291,817 shares of Common Stock; (x) ACOF VI Frontier AIV A10 owns 92,277 shares of Common Stock; (xi) ACOF VI Frontier AIV B1 owns 15,403,335 shares of Common Stock; (continued in next footnote)

F8 · ownership.nature: (xii) ASOF Frontier AIV A1 owns 105,592 shares of Common Stock; (xiii) ASOF Frontier AIV A2 owns 18,032 shares of Common Stock; (xiv) ASOF Frontier AIV A3 owns 830,837 shares of Common Stock; (xv) ASOF Frontier AIV A4 owns 281,844 shares of Common Stock; (xvi) ASOF Frontier AIV A5 owns 167,160 shares of Common Stock; (xvii) ASOF Frontier AIV A6 owns 292,124 shares of Common Stock; (xviii) ASOF Frontier AIV A7 owns 289,417 shares of Common Stock; (xix) ASOF Frontier AIV A8 owns 238,026 shares of Common Stock; (xx) ASOF Frontier AIV A9 owns 360,644 shares of Common Stock; (xxi) ASOF Frontier AIV A10 owns 259,665 shares of Common Stock; (xxii) ASOF Frontier AIV A11 owns 245,236 shares of Common Stock; (xxiii) ASOF Frontier AIV B1 owns 9,597,579 shares of Common Stock; (continued in next footnote)

F9 · ownership.nature: (xxiv) ASOF II Frontier Holdings 1 owns 1,092,678 shares of Common Stock, (xxv) ASOF II Frontier Holdings 2 owns 52,666 shares of Common Stock, (xxvi) ASOF II Frontier Holdings 3 owns 58,659 shares of Common Stock, (xxvii) ASOF II Frontier Holdings 4 owns 56,853 shares of Common Stock, (xxviii) ASOF II Frontier Holdings 5 owns 56,307 shares of Common Stock, (xxix) ASOF II Frontier Holdings 6 owns 59,671 shares of Common Stock, (xxx) ASOF II Frontier Holdings 7 owns 59,820 shares of Common Stock, (xxxi) ASOF II A (DE) Frontier Holdings 1 owns 261,753 shares of Common Stock; (xxxii) ASOF II A (DE) Frontier Holdings 2 owns 9,631 shares of Common Stock; (xxxiii) ASSF IV AIV B Holdings III owns 2,694,243 shares of Common Stock and (xxxiv) ASSF IV AIV B directly or indirectly owns 5,348,289 shares of Common Stock.

F10 · ownership.nature: Ares Partners is the sole member of each of Ares Voting and Ares Management GP, which are respectively the holders of the Class B and Class C common stock of Ares Management, which common stock allows them, collectively, to generally have the majority of the votes on any matter submitted to the stockholders of Ares Management if certain conditions are met. Ares Management is the sole member of Ares Holdco, which is the general partner of Ares Management Holdings, which is the sole member of Ares Management LLC, which is: (a) the sole member of ACOF Investment Management, which is the manager of the ACOF Funds, (b) the sole member of ASOF Investment Management, which is the manager of the ASOF Funds, and (c) the general partner of ASSF Operating Manager IV, which is the manager of the ASSF Funds.

F11 · ownership.nature: Ares Partners is managed by a board of managers, which is composed of Michael J Arougheti, Ryan Berry, R. Kipp deVeer, David B. Kaplan, Antony P. Ressler and Bennett Rosenthal (collectively, the "Board Members"). Mr. Ressler generally has veto authority over Board Members' decisions.

F12 · ownership.nature: Each of the Reporting Persons, and the Board Members, and the other directors, officers, partners, stockholders, members and managers of the Reporting Persons, expressly disclaims beneficial ownership of the Common Stock, except to the extent of any pecuniary interest therein, and this Form 4 shall not be deemed an admission that any such person or entity is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purposes.

SEC source: 0001104659-23-040339 · tm2311119-1_4seq1.xml · nonDerivative · entry 1

ARES MANAGEMENT LLC · CIK 0001259313 · 10% owner

ACOF VI Frontier AIV A1, L.P. · CIK 0001862494 · 10% owner

ACOF VI Frontier AIV A2, L.P. · CIK 0001862499 · 10% owner

ACOF VI Frontier AIV A3, L.P. · CIK 0001862534 · 10% owner

ACOF VI Frontier AIV A4, L.P. · CIK 0001862529 · 10% owner

ACOF VI Frontier AIV A5, L.P. · CIK 0001862526 · 10% owner

ACOF VI Frontier AIV A6, L.P. · CIK 0001862483 · 10% owner

ACOF VI Frontier AIV A7, L.P. · CIK 0001862482 · 10% owner

ACOF VI Frontier AIV A8, L.P. · CIK 0001862505 · 10% owner

ACOF VI Frontier AIV A9, L.P. · CIK 0001862533 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnotes

Disclosed balance after: 37,094,654

F1 · balance_after: This statement is being filed by ACOF VI Frontier AIV A1, L.P. ("ACOF VI Frontier AIV A1"), ACOF VI Frontier AIV A2, L.P. ("ACOF VI Frontier AIV A2"), ACOF VI Frontier AIV A3, L.P. ("ACOF VI Frontier AIV A3"), ACOF VI Frontier AIV A4, L.P. ("ACOF VI Frontier AIV A4"), ACOF VI Frontier AIV A5, L.P. ("ACOF VI Frontier AIV A5"), ACOF VI Frontier AIV A6, L.P. ("ACOF VI Frontier AIV A6"), ACOF VI Frontier AIV A7, L.P. ("ACOF VI Frontier AIV A7"), ACOF VI Frontier AIV A8, L.P. ("ACOF VI Frontier AIV A8"), ACOF VI Frontier AIV A9, L.P. ("ACOF VI Frontier AIV A9"), ACOF VI Frontier AIV A10, L.P. ("ACOF VI Frontier AIV A10"), and ACOF VI Frontier AIV B1, L.P. ("ACOF VI Frontier AIV B1", together with the foregoing entities, the "ACOF Funds"), (continued in next footnote)

F2 · balance_after: ASOF Frontier AIV A1, L.P. ("ASOF Frontier AIV A1"), ASOF Frontier AIV A2, L.P. ("ASOF Frontier AIV A2"), ASOF Frontier AIV A3, L.P. ("ASOF Frontier AIV A3"), ASOF Frontier AIV A4, L.P. ("ASOF Frontier AIV A4"), ASOF Frontier AIV A5, L.P. ("ASOF Frontier AIV A5"), ASOF Frontier AIV A6, L.P. ("ASOF Frontier AIV A6"), ASOF Frontier AIV A7, L.P. ("ASOF Frontier AIV A7"), ASOF Frontier AIV A8, L.P. ("ASOF Frontier AIV A8"), ASOF Frontier AIV A9, L.P. ("ASOF Frontier AIV A9"), ASOF Frontier AIV A10, L.P. ("ASOF Frontier AIV A10"), ASOF Frontier AIV A11, L.P. ("ASOF Frontier AIV A11"), ASOF Frontier AIV B1, L.P. ("ASOF Frontier AIV B1"), (continued in next footnote)

F3 · balance_after: ASOF II Frontier Holdings 1 L.P. ("ASOF II Frontier Holdings 1"), ASOF II Frontier Holdings 2 L.P. ("ASOF II Frontier Holdings 2"), ASOF II Frontier Holdings 3 L.P. ("ASOF II Frontier Holdings 3"), ASOF II Frontier Holdings 4 L.P. ("ASOF II Frontier Holdings 4"), ASOF II Frontier Holdings 5 L.P. ("ASOF II Frontier Holdings 5"), ASOF II Frontier Holdings 6 L.P. ("ASOF II Frontier Holdings 6"), (continued in next footnote)

F4 · balance_after: ASOF II Frontier Holdings 7 L.P. ("ASOF II Frontier Holdings 7"), ASOF II A (DE) Frontier Holdings 1 L.P. ("ASOF II A (DE) Frontier Holdings 1") and ASOF II A (DE) Frontier Holdings 2 L.P. ("ASOF II A (DE) Frontier Holdings 2", and together with ASOF Frontier AIV A1, ASOF Frontier AIV A2, ASOF Frontier AIV A3, ASOF Frontier AIV A4, ASOF Frontier AIV A5, ASOF Frontier AIV A6, ASOF Frontier AIV A7, ASOF Frontier AIV A8, ASOF Frontier AIV A9, ASOF Frontier AIV A10, and ASOF Frontier AIV A11, ASOF II Frontier Holdings 1, ASOF II Frontier Holdings 2, ASOF II Frontier Holdings 3, ASOF II Frontier Holdings 4, ASOF II Frontier Holdings 5, ASOF II Frontier Holdings 6, ASOF II Frontier Holdings 7 and ASOF II A (DE) Frontier Holdings 1, the "ASOF Funds"), (continued in next footnote)

F5 · balance_after: ASSF IV AIV B Holdings III, L.P. ("ASSF IV AIV B Holdings III"), ASSF IV AIV B, L.P. ("ASSF IV AIV B", and together with ASSF IV AIV B Holdings III, the "ASSF Funds"), ACOF Investment Management LLC ("ACOF Investment Management"), ASOF Investment Management LLC ("ASOF Investment Management"), ASSF Operating Manager IV, L.P. ("ASSF Operating Manager IV"), (continued in next footnote)

F6 · balance_after: Ares Management LLC, Ares Management Holdings L.P. ("Ares Management Holdings"), Ares Holdco LLC ("Ares Holdco"), Ares Management Corporation ("Ares Management"), Ares Management GP LLC ("Ares Management GP"), Ares Voting LLC ("Ares Voting") and Ares Partners Holdco LLC ("Ares Partners", and together with the ACOF Funds, the ASOF Funds, the ASSF Funds, ACOF Investment Management, ASOF Investment Management, ASSF Operating Manager IV, Ares Management LLC, Ares Management Holdings, Ares Holdco, Ares Management, Ares Management GP, and Ares Voting, the "Reporting Persons"). Due to the electronic system's limitation of 10 Reporting Persons per joint filing, this statement is being filed in five parts.

F7 · balance_after: The Reporting Persons collectively beneficially own, or may be deemed to beneficially own, in the aggregate 37,094,654 shares of Common Stock by reason of the direct or indirect beneficial ownership of such shares as follows: (i) ACOF VI Frontier AIV A1 owns 254,663 shares of Common Stock; (ii) ACOF VI Frontier AIV A2 owns 91,323 shares of Common Stock; (iii) ACOF VI Frontier AIV A3 owns 21,308 shares of Common Stock; (iv) ACOF VI Frontier AIV A4 owns 277,015 shares of Common Stock; (v) ACOF VI Frontier AIV A5 owns 304,411 shares of Common Stock; (vi) ACOF VI Frontier AIV A6 owns 170,471 shares of Common Stock; (vii) ACOF VI Frontier AIV A7 owns 308,502 shares of Common Stock; (viii) ACOF VI Frontier AIV A8 owns shares 309,891 of Common Stock; (ix) ACOF VI Frontier AIV A9 owns 291,018 shares of Common Stock; (x) ACOF VI Frontier AIV A10 owns 92,024 shares of Common Stock; (xi) ACOF VI Frontier AIV B1 owns 15,361,158 shares of Common Stock; (continued in next footnote)

F8 · balance_after: (xii) ASOF Frontier AIV A1 owns 105,592 shares of Common Stock; (xiii) ASOF Frontier AIV A2 owns 18,032 shares of Common Stock; (xiv) ASOF Frontier AIV A3 owns 830,837 shares of Common Stock; (xv) ASOF Frontier AIV A4 owns 281,844 shares of Common Stock; (xvi) ASOF Frontier AIV A5 owns 167,160 shares of Common Stock; (xvii) ASOF Frontier AIV A6 owns 292,124 shares of Common Stock; (xviii) ASOF Frontier AIV A7 owns 289,417 shares of Common Stock; (xix) ASOF Frontier AIV A8 owns 238,026 shares of Common Stock; (xx) ASOF Frontier AIV A9 owns 360,644 shares of Common Stock; (xxi) ASOF Frontier AIV A10 owns 259,665 shares of Common Stock; (xxii) ASOF Frontier AIV A11 owns 245,236 shares of Common Stock; (xxiii) ASOF Frontier AIV B1 owns 9,597,579 shares of Common Stock; (continued in next footnote)

F9 · balance_after: (xxiv) ASOF II Frontier Holdings 1 owns 995,439 shares of Common Stock, (xxv) ASOF II Frontier Holdings 2 owns 47,979 shares of Common Stock, (xxvi) ASOF II Frontier Holdings 3 owns 53,439 shares of Common Stock, (xxvii) ASOF II Frontier Holdings 4 owns 51,794 shares of Common Stock, (xxviii) ASOF II Frontier Holdings 5 owns 51,296 shares of Common Stock, (xxix) ASOF II Frontier Holdings 6 owns 54,361 shares of Common Stock, (xxx) ASOF II Frontier Holdings 7 owns 54,497 shares of Common Stock, (xxxi) ASOF II A (DE) Frontier Holdings 1 owns 238,459 shares of Common Stock; (xxxii) ASOF II A (DE) Frontier Holdings 2 owns 8,774 shares of Common Stock; (xxxiii) ASSF IV AIV B Holdings III owns 2,694,243 shares of Common Stock and (xxxiv) ASSF IV AIV B directly or indirectly owns 5,348,289 shares of Common Stock.

F10 · balance_after: Ares Partners is the sole member of each of Ares Voting and Ares Management GP, which are respectively the holders of the Class B and Class C common stock of Ares Management, which common stock allows them, collectively, to generally have the majority of the votes on any matter submitted to the stockholders of Ares Management if certain conditions are met. Ares Management is the sole member of Ares Holdco, which is the general partner of Ares Management Holdings, which is the sole member of Ares Management LLC, which is: (a) the sole member of ACOF Investment Management, which is the manager of the ACOF Funds, (b) the sole member of ASOF Investment Management, which is the manager of the ASOF Funds, and (c) the general partner of ASSF Operating Manager IV, which is the manager of the ASSF Funds.

F11 · balance_after: Ares Partners is managed by a board of managers, which is composed of Michael J Arougheti, Ryan Berry, R. Kipp deVeer, David B. Kaplan, Antony P. Ressler and Bennett Rosenthal (collectively, the "Board Members"). Mr. Ressler generally has veto authority over Board Members' decisions.

F12 · balance_after: Each of the Reporting Persons, and the Board Members, and the other directors, officers, partners, stockholders, members and managers of the Reporting Persons, expressly disclaims beneficial ownership of the Common Stock, except to the extent of any pecuniary interest therein, and this Form 4 shall not be deemed an admission that any such person or entity is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purposes.

F1 · ownership.nature: This statement is being filed by ACOF VI Frontier AIV A1, L.P. ("ACOF VI Frontier AIV A1"), ACOF VI Frontier AIV A2, L.P. ("ACOF VI Frontier AIV A2"), ACOF VI Frontier AIV A3, L.P. ("ACOF VI Frontier AIV A3"), ACOF VI Frontier AIV A4, L.P. ("ACOF VI Frontier AIV A4"), ACOF VI Frontier AIV A5, L.P. ("ACOF VI Frontier AIV A5"), ACOF VI Frontier AIV A6, L.P. ("ACOF VI Frontier AIV A6"), ACOF VI Frontier AIV A7, L.P. ("ACOF VI Frontier AIV A7"), ACOF VI Frontier AIV A8, L.P. ("ACOF VI Frontier AIV A8"), ACOF VI Frontier AIV A9, L.P. ("ACOF VI Frontier AIV A9"), ACOF VI Frontier AIV A10, L.P. ("ACOF VI Frontier AIV A10"), and ACOF VI Frontier AIV B1, L.P. ("ACOF VI Frontier AIV B1", together with the foregoing entities, the "ACOF Funds"), (continued in next footnote)

F2 · ownership.nature: ASOF Frontier AIV A1, L.P. ("ASOF Frontier AIV A1"), ASOF Frontier AIV A2, L.P. ("ASOF Frontier AIV A2"), ASOF Frontier AIV A3, L.P. ("ASOF Frontier AIV A3"), ASOF Frontier AIV A4, L.P. ("ASOF Frontier AIV A4"), ASOF Frontier AIV A5, L.P. ("ASOF Frontier AIV A5"), ASOF Frontier AIV A6, L.P. ("ASOF Frontier AIV A6"), ASOF Frontier AIV A7, L.P. ("ASOF Frontier AIV A7"), ASOF Frontier AIV A8, L.P. ("ASOF Frontier AIV A8"), ASOF Frontier AIV A9, L.P. ("ASOF Frontier AIV A9"), ASOF Frontier AIV A10, L.P. ("ASOF Frontier AIV A10"), ASOF Frontier AIV A11, L.P. ("ASOF Frontier AIV A11"), ASOF Frontier AIV B1, L.P. ("ASOF Frontier AIV B1"), (continued in next footnote)

F3 · ownership.nature: ASOF II Frontier Holdings 1 L.P. ("ASOF II Frontier Holdings 1"), ASOF II Frontier Holdings 2 L.P. ("ASOF II Frontier Holdings 2"), ASOF II Frontier Holdings 3 L.P. ("ASOF II Frontier Holdings 3"), ASOF II Frontier Holdings 4 L.P. ("ASOF II Frontier Holdings 4"), ASOF II Frontier Holdings 5 L.P. ("ASOF II Frontier Holdings 5"), ASOF II Frontier Holdings 6 L.P. ("ASOF II Frontier Holdings 6"), (continued in next footnote)

F4 · ownership.nature: ASOF II Frontier Holdings 7 L.P. ("ASOF II Frontier Holdings 7"), ASOF II A (DE) Frontier Holdings 1 L.P. ("ASOF II A (DE) Frontier Holdings 1") and ASOF II A (DE) Frontier Holdings 2 L.P. ("ASOF II A (DE) Frontier Holdings 2", and together with ASOF Frontier AIV A1, ASOF Frontier AIV A2, ASOF Frontier AIV A3, ASOF Frontier AIV A4, ASOF Frontier AIV A5, ASOF Frontier AIV A6, ASOF Frontier AIV A7, ASOF Frontier AIV A8, ASOF Frontier AIV A9, ASOF Frontier AIV A10, and ASOF Frontier AIV A11, ASOF II Frontier Holdings 1, ASOF II Frontier Holdings 2, ASOF II Frontier Holdings 3, ASOF II Frontier Holdings 4, ASOF II Frontier Holdings 5, ASOF II Frontier Holdings 6, ASOF II Frontier Holdings 7 and ASOF II A (DE) Frontier Holdings 1, the "ASOF Funds"), (continued in next footnote)

F5 · ownership.nature: ASSF IV AIV B Holdings III, L.P. ("ASSF IV AIV B Holdings III"), ASSF IV AIV B, L.P. ("ASSF IV AIV B", and together with ASSF IV AIV B Holdings III, the "ASSF Funds"), ACOF Investment Management LLC ("ACOF Investment Management"), ASOF Investment Management LLC ("ASOF Investment Management"), ASSF Operating Manager IV, L.P. ("ASSF Operating Manager IV"), (continued in next footnote)

F6 · ownership.nature: Ares Management LLC, Ares Management Holdings L.P. ("Ares Management Holdings"), Ares Holdco LLC ("Ares Holdco"), Ares Management Corporation ("Ares Management"), Ares Management GP LLC ("Ares Management GP"), Ares Voting LLC ("Ares Voting") and Ares Partners Holdco LLC ("Ares Partners", and together with the ACOF Funds, the ASOF Funds, the ASSF Funds, ACOF Investment Management, ASOF Investment Management, ASSF Operating Manager IV, Ares Management LLC, Ares Management Holdings, Ares Holdco, Ares Management, Ares Management GP, and Ares Voting, the "Reporting Persons"). Due to the electronic system's limitation of 10 Reporting Persons per joint filing, this statement is being filed in five parts.

F7 · ownership.nature: The Reporting Persons collectively beneficially own, or may be deemed to beneficially own, in the aggregate 37,094,654 shares of Common Stock by reason of the direct or indirect beneficial ownership of such shares as follows: (i) ACOF VI Frontier AIV A1 owns 254,663 shares of Common Stock; (ii) ACOF VI Frontier AIV A2 owns 91,323 shares of Common Stock; (iii) ACOF VI Frontier AIV A3 owns 21,308 shares of Common Stock; (iv) ACOF VI Frontier AIV A4 owns 277,015 shares of Common Stock; (v) ACOF VI Frontier AIV A5 owns 304,411 shares of Common Stock; (vi) ACOF VI Frontier AIV A6 owns 170,471 shares of Common Stock; (vii) ACOF VI Frontier AIV A7 owns 308,502 shares of Common Stock; (viii) ACOF VI Frontier AIV A8 owns shares 309,891 of Common Stock; (ix) ACOF VI Frontier AIV A9 owns 291,018 shares of Common Stock; (x) ACOF VI Frontier AIV A10 owns 92,024 shares of Common Stock; (xi) ACOF VI Frontier AIV B1 owns 15,361,158 shares of Common Stock; (continued in next footnote)

F8 · ownership.nature: (xii) ASOF Frontier AIV A1 owns 105,592 shares of Common Stock; (xiii) ASOF Frontier AIV A2 owns 18,032 shares of Common Stock; (xiv) ASOF Frontier AIV A3 owns 830,837 shares of Common Stock; (xv) ASOF Frontier AIV A4 owns 281,844 shares of Common Stock; (xvi) ASOF Frontier AIV A5 owns 167,160 shares of Common Stock; (xvii) ASOF Frontier AIV A6 owns 292,124 shares of Common Stock; (xviii) ASOF Frontier AIV A7 owns 289,417 shares of Common Stock; (xix) ASOF Frontier AIV A8 owns 238,026 shares of Common Stock; (xx) ASOF Frontier AIV A9 owns 360,644 shares of Common Stock; (xxi) ASOF Frontier AIV A10 owns 259,665 shares of Common Stock; (xxii) ASOF Frontier AIV A11 owns 245,236 shares of Common Stock; (xxiii) ASOF Frontier AIV B1 owns 9,597,579 shares of Common Stock; (continued in next footnote)

F9 · ownership.nature: (xxiv) ASOF II Frontier Holdings 1 owns 995,439 shares of Common Stock, (xxv) ASOF II Frontier Holdings 2 owns 47,979 shares of Common Stock, (xxvi) ASOF II Frontier Holdings 3 owns 53,439 shares of Common Stock, (xxvii) ASOF II Frontier Holdings 4 owns 51,794 shares of Common Stock, (xxviii) ASOF II Frontier Holdings 5 owns 51,296 shares of Common Stock, (xxix) ASOF II Frontier Holdings 6 owns 54,361 shares of Common Stock, (xxx) ASOF II Frontier Holdings 7 owns 54,497 shares of Common Stock, (xxxi) ASOF II A (DE) Frontier Holdings 1 owns 238,459 shares of Common Stock; (xxxii) ASOF II A (DE) Frontier Holdings 2 owns 8,774 shares of Common Stock; (xxxiii) ASSF IV AIV B Holdings III owns 2,694,243 shares of Common Stock and (xxxiv) ASSF IV AIV B directly or indirectly owns 5,348,289 shares of Common Stock.

F10 · ownership.nature: Ares Partners is the sole member of each of Ares Voting and Ares Management GP, which are respectively the holders of the Class B and Class C common stock of Ares Management, which common stock allows them, collectively, to generally have the majority of the votes on any matter submitted to the stockholders of Ares Management if certain conditions are met. Ares Management is the sole member of Ares Holdco, which is the general partner of Ares Management Holdings, which is the sole member of Ares Management LLC, which is: (a) the sole member of ACOF Investment Management, which is the manager of the ACOF Funds, (b) the sole member of ASOF Investment Management, which is the manager of the ASOF Funds, and (c) the general partner of ASSF Operating Manager IV, which is the manager of the ASSF Funds.

F11 · ownership.nature: Ares Partners is managed by a board of managers, which is composed of Michael J Arougheti, Ryan Berry, R. Kipp deVeer, David B. Kaplan, Antony P. Ressler and Bennett Rosenthal (collectively, the "Board Members"). Mr. Ressler generally has veto authority over Board Members' decisions.

F12 · ownership.nature: Each of the Reporting Persons, and the Board Members, and the other directors, officers, partners, stockholders, members and managers of the Reporting Persons, expressly disclaims beneficial ownership of the Common Stock, except to the extent of any pecuniary interest therein, and this Form 4 shall not be deemed an admission that any such person or entity is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purposes.

SEC source: 0001104659-23-038294 · tm2310833-1_4seq1.xml · nonDerivative · entry 2

ARES MANAGEMENT LLC · CIK 0001259313 · 10% owner

ACOF VI Frontier AIV A1, L.P. · CIK 0001862494 · 10% owner

ACOF VI Frontier AIV A2, L.P. · CIK 0001862499 · 10% owner

ACOF VI Frontier AIV A3, L.P. · CIK 0001862534 · 10% owner

ACOF VI Frontier AIV A4, L.P. · CIK 0001862529 · 10% owner

ACOF VI Frontier AIV A5, L.P. · CIK 0001862526 · 10% owner

ACOF VI Frontier AIV A6, L.P. · CIK 0001862483 · 10% owner

ACOF VI Frontier AIV A7, L.P. · CIK 0001862482 · 10% owner

ACOF VI Frontier AIV A8, L.P. · CIK 0001862505 · 10% owner

ACOF VI Frontier AIV A9, L.P. · CIK 0001862533 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnotes

Disclosed balance after: 36,955,132

F1 · balance_after: This statement is being filed by ACOF VI Frontier AIV A1, L.P. ("ACOF VI Frontier AIV A1"), ACOF VI Frontier AIV A2, L.P. ("ACOF VI Frontier AIV A2"), ACOF VI Frontier AIV A3, L.P. ("ACOF VI Frontier AIV A3"), ACOF VI Frontier AIV A4, L.P. ("ACOF VI Frontier AIV A4"), ACOF VI Frontier AIV A5, L.P. ("ACOF VI Frontier AIV A5"), ACOF VI Frontier AIV A6, L.P. ("ACOF VI Frontier AIV A6"), ACOF VI Frontier AIV A7, L.P. ("ACOF VI Frontier AIV A7"), ACOF VI Frontier AIV A8, L.P. ("ACOF VI Frontier AIV A8"), ACOF VI Frontier AIV A9, L.P. ("ACOF VI Frontier AIV A9"), ACOF VI Frontier AIV A10, L.P. ("ACOF VI Frontier AIV A10"), and ACOF VI Frontier AIV B1, L.P. ("ACOF VI Frontier AIV B1", together with the foregoing entities, the "ACOF Funds"), (continued in next footnote)

F2 · balance_after: ASOF Frontier AIV A1, L.P. ("ASOF Frontier AIV A1"), ASOF Frontier AIV A2, L.P. ("ASOF Frontier AIV A2"), ASOF Frontier AIV A3, L.P. ("ASOF Frontier AIV A3"), ASOF Frontier AIV A4, L.P. ("ASOF Frontier AIV A4"), ASOF Frontier AIV A5, L.P. ("ASOF Frontier AIV A5"), ASOF Frontier AIV A6, L.P. ("ASOF Frontier AIV A6"), ASOF Frontier AIV A7, L.P. ("ASOF Frontier AIV A7"), ASOF Frontier AIV A8, L.P. ("ASOF Frontier AIV A8"), ASOF Frontier AIV A9, L.P. ("ASOF Frontier AIV A9"), ASOF Frontier AIV A10, L.P. ("ASOF Frontier AIV A10"), ASOF Frontier AIV A11, L.P. ("ASOF Frontier AIV A11"), ASOF Frontier AIV B1, L.P. ("ASOF Frontier AIV B1"), (continued in next footnote)

F3 · balance_after: ASOF II Frontier Holdings 1 L.P. ("ASOF II Frontier Holdings 1"), ASOF II Frontier Holdings 2 L.P. ("ASOF II Frontier Holdings 2"), ASOF II Frontier Holdings 3 L.P. ("ASOF II Frontier Holdings 3"), ASOF II Frontier Holdings 4 L.P. ("ASOF II Frontier Holdings 4"), ASOF II Frontier Holdings 5 L.P. ("ASOF II Frontier Holdings 5"), ASOF II Frontier Holdings 6 L.P. ("ASOF II Frontier Holdings 6"), (continued in next footnote)

F4 · balance_after: ASOF II Frontier Holdings 7 L.P. ("ASOF II Frontier Holdings 7"), ASOF II A (DE) Frontier Holdings 1 L.P. ("ASOF II A (DE) Frontier Holdings 1") and ASOF II A (DE) Frontier Holdings 2 L.P. ("ASOF II A (DE) Frontier Holdings 2", and together with ASOF Frontier AIV A1, ASOF Frontier AIV A2, ASOF Frontier AIV A3, ASOF Frontier AIV A4, ASOF Frontier AIV A5, ASOF Frontier AIV A6, ASOF Frontier AIV A7, ASOF Frontier AIV A8, ASOF Frontier AIV A9, ASOF Frontier AIV A10, and ASOF Frontier AIV A11, ASOF II Frontier Holdings 1, ASOF II Frontier Holdings 2, ASOF II Frontier Holdings 3, ASOF II Frontier Holdings 4, ASOF II Frontier Holdings 5, ASOF II Frontier Holdings 6, ASOF II Frontier Holdings 7 and ASOF II A (DE) Frontier Holdings 1, the "ASOF Funds"), (continued in next footnote)

F5 · balance_after: ASSF IV AIV B Holdings III, L.P. ("ASSF IV AIV B Holdings III"), ASSF IV AIV B, L.P. ("ASSF IV AIV B", and together with ASSF IV AIV B Holdings III, the "ASSF Funds"), ACOF Investment Management LLC ("ACOF Investment Management"), ASOF Investment Management LLC ("ASOF Investment Management"), ASSF Operating Manager IV, L.P. ("ASSF Operating Manager IV"), (continued in next footnote)

F6 · balance_after: Ares Management LLC, Ares Management Holdings L.P. ("Ares Management Holdings"), Ares Holdco LLC ("Ares Holdco"), Ares Management Corporation ("Ares Management"), Ares Management GP LLC ("Ares Management GP"), Ares Voting LLC ("Ares Voting") and Ares Partners Holdco LLC ("Ares Partners", and together with the ACOF Funds, the ASOF Funds, the ASSF Funds, ACOF Investment Management, ASOF Investment Management, ASSF Operating Manager IV, Ares Management LLC, Ares Management Holdings, Ares Holdco, Ares Management, Ares Management GP, and Ares Voting, the "Reporting Persons"). Due to the electronic system's limitation of 10 Reporting Persons per joint filing, this statement is being filed in five parts.

F7 · balance_after: The Reporting Persons collectively beneficially own, or may be deemed to beneficially own, in the aggregate 36,955,132 shares of Common Stock by reason of the direct or indirect beneficial ownership of such shares as follows: (i) ACOF VI Frontier AIV A1 owns 254,175 shares of Common Stock; (ii) ACOF VI Frontier AIV A2 owns 91,148 shares of Common Stock; (iii) ACOF VI Frontier AIV A3 owns 21,267 shares of Common Stock; (iv) ACOF VI Frontier AIV A4 owns 276,484 shares of Common Stock; (v) ACOF VI Frontier AIV A5 owns 303,828 shares of Common Stock; (vi) ACOF VI Frontier AIV A6 owns 170,144 shares of Common Stock; (vii) ACOF VI Frontier AIV A7 owns 307,911 shares of Common Stock; (viii) ACOF VI Frontier AIV A8 owns shares 309,297 of Common Stock; (ix) ACOF VI Frontier AIV A9 owns 290,461 shares of Common Stock; (x) ACOF VI Frontier AIV A10 owns 91,848 shares of Common Stock; (xi) ACOF VI Frontier AIV B1 owns 15,331,737 shares of Common Stock; (continued in next footnote)

F8 · balance_after: (xii) ASOF Frontier AIV A1 owns 105,592 shares of Common Stock; (xiii) ASOF Frontier AIV A2 owns 18,032 shares of Common Stock; (xiv) ASOF Frontier AIV A3 owns 830,837 shares of Common Stock; (xv) ASOF Frontier AIV A4 owns 281,844 shares of Common Stock; (xvi) ASOF Frontier AIV A5 owns 167,160 shares of Common Stock; (xvii) ASOF Frontier AIV A6 owns 292,124 shares of Common Stock; (xviii) ASOF Frontier AIV A7 owns 289,417 shares of Common Stock; (xix) ASOF Frontier AIV A8 owns 238,026 shares of Common Stock; (xx) ASOF Frontier AIV A9 owns 360,644 shares of Common Stock; (xxi) ASOF Frontier AIV A10 owns 259,665 shares of Common Stock; (xxii) ASOF Frontier AIV A11 owns 245,236 shares of Common Stock; (xxiii) ASOF Frontier AIV B1 owns 9,597,579 shares of Common Stock; (continued in next footnote)

F9 · balance_after: (xxiv) ASOF II Frontier Holdings 1 owns 927,604 shares of Common Stock, (xxv) ASOF II Frontier Holdings 2 owns 44,709 shares of Common Stock, (xxvi) ASOF II Frontier Holdings 3 owns 49,797 shares of Common Stock, (xxvii) ASOF II Frontier Holdings 4 owns 48,264 shares of Common Stock, (xxviii) ASOF II Frontier Holdings 5 owns 47,801 shares of Common Stock, (xxix) ASOF II Frontier Holdings 6 owns 50,657 shares of Common Stock, (xxx) ASOF II Frontier Holdings 7 owns 50,783 shares of Common Stock, (xxxi) ASOF II A (DE) Frontier Holdings 1 owns 222,209 shares of Common Stock; (xxxii) ASOF II A (DE) Frontier Holdings 2 owns 8,176 shares of Common Stock; (xxxiii) ASSF IV AIV B Holdings III owns 2,694,243 shares of Common Stock and (xxxiv) ASSF IV AIV B directly or indirectly owns 5,348,289 shares of Common Stock.

F10 · balance_after: Ares Partners is the sole member of each of Ares Voting and Ares Management GP, which are respectively the holders of the Class B and Class C common stock of Ares Management, which common stock allows them, collectively, to generally have the majority of the votes on any matter submitted to the stockholders of Ares Management if certain conditions are met. Ares Management is the sole member of Ares Holdco, which is the general partner of Ares Management Holdings, which is the sole member of Ares Management LLC, which is: (a) the sole member of ACOF Investment Management, which is the manager of the ACOF Funds, (b) the sole member of ASOF Investment Management, which is the manager of the ASOF Funds, and (c) the general partner of ASSF Operating Manager IV, which is the manager of the ASSF Funds.

F11 · balance_after: Ares Partners is managed by a board of managers, which is composed of Michael J Arougheti, Ryan Berry, R. Kipp deVeer, David B. Kaplan, Antony P. Ressler and Bennett Rosenthal (collectively, the "Board Members"). Mr. Ressler generally has veto authority over Board Members' decisions.

F12 · balance_after: Each of the Reporting Persons, and the Board Members, and the other directors, officers, partners, stockholders, members and managers of the Reporting Persons, expressly disclaims beneficial ownership of the Common Stock, except to the extent of any pecuniary interest therein, and this Form 4 shall not be deemed an admission that any such person or entity is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purposes.

F1 · ownership.nature: This statement is being filed by ACOF VI Frontier AIV A1, L.P. ("ACOF VI Frontier AIV A1"), ACOF VI Frontier AIV A2, L.P. ("ACOF VI Frontier AIV A2"), ACOF VI Frontier AIV A3, L.P. ("ACOF VI Frontier AIV A3"), ACOF VI Frontier AIV A4, L.P. ("ACOF VI Frontier AIV A4"), ACOF VI Frontier AIV A5, L.P. ("ACOF VI Frontier AIV A5"), ACOF VI Frontier AIV A6, L.P. ("ACOF VI Frontier AIV A6"), ACOF VI Frontier AIV A7, L.P. ("ACOF VI Frontier AIV A7"), ACOF VI Frontier AIV A8, L.P. ("ACOF VI Frontier AIV A8"), ACOF VI Frontier AIV A9, L.P. ("ACOF VI Frontier AIV A9"), ACOF VI Frontier AIV A10, L.P. ("ACOF VI Frontier AIV A10"), and ACOF VI Frontier AIV B1, L.P. ("ACOF VI Frontier AIV B1", together with the foregoing entities, the "ACOF Funds"), (continued in next footnote)

F2 · ownership.nature: ASOF Frontier AIV A1, L.P. ("ASOF Frontier AIV A1"), ASOF Frontier AIV A2, L.P. ("ASOF Frontier AIV A2"), ASOF Frontier AIV A3, L.P. ("ASOF Frontier AIV A3"), ASOF Frontier AIV A4, L.P. ("ASOF Frontier AIV A4"), ASOF Frontier AIV A5, L.P. ("ASOF Frontier AIV A5"), ASOF Frontier AIV A6, L.P. ("ASOF Frontier AIV A6"), ASOF Frontier AIV A7, L.P. ("ASOF Frontier AIV A7"), ASOF Frontier AIV A8, L.P. ("ASOF Frontier AIV A8"), ASOF Frontier AIV A9, L.P. ("ASOF Frontier AIV A9"), ASOF Frontier AIV A10, L.P. ("ASOF Frontier AIV A10"), ASOF Frontier AIV A11, L.P. ("ASOF Frontier AIV A11"), ASOF Frontier AIV B1, L.P. ("ASOF Frontier AIV B1"), (continued in next footnote)

F3 · ownership.nature: ASOF II Frontier Holdings 1 L.P. ("ASOF II Frontier Holdings 1"), ASOF II Frontier Holdings 2 L.P. ("ASOF II Frontier Holdings 2"), ASOF II Frontier Holdings 3 L.P. ("ASOF II Frontier Holdings 3"), ASOF II Frontier Holdings 4 L.P. ("ASOF II Frontier Holdings 4"), ASOF II Frontier Holdings 5 L.P. ("ASOF II Frontier Holdings 5"), ASOF II Frontier Holdings 6 L.P. ("ASOF II Frontier Holdings 6"), (continued in next footnote)

F4 · ownership.nature: ASOF II Frontier Holdings 7 L.P. ("ASOF II Frontier Holdings 7"), ASOF II A (DE) Frontier Holdings 1 L.P. ("ASOF II A (DE) Frontier Holdings 1") and ASOF II A (DE) Frontier Holdings 2 L.P. ("ASOF II A (DE) Frontier Holdings 2", and together with ASOF Frontier AIV A1, ASOF Frontier AIV A2, ASOF Frontier AIV A3, ASOF Frontier AIV A4, ASOF Frontier AIV A5, ASOF Frontier AIV A6, ASOF Frontier AIV A7, ASOF Frontier AIV A8, ASOF Frontier AIV A9, ASOF Frontier AIV A10, and ASOF Frontier AIV A11, ASOF II Frontier Holdings 1, ASOF II Frontier Holdings 2, ASOF II Frontier Holdings 3, ASOF II Frontier Holdings 4, ASOF II Frontier Holdings 5, ASOF II Frontier Holdings 6, ASOF II Frontier Holdings 7 and ASOF II A (DE) Frontier Holdings 1, the "ASOF Funds"), (continued in next footnote)

F5 · ownership.nature: ASSF IV AIV B Holdings III, L.P. ("ASSF IV AIV B Holdings III"), ASSF IV AIV B, L.P. ("ASSF IV AIV B", and together with ASSF IV AIV B Holdings III, the "ASSF Funds"), ACOF Investment Management LLC ("ACOF Investment Management"), ASOF Investment Management LLC ("ASOF Investment Management"), ASSF Operating Manager IV, L.P. ("ASSF Operating Manager IV"), (continued in next footnote)

F6 · ownership.nature: Ares Management LLC, Ares Management Holdings L.P. ("Ares Management Holdings"), Ares Holdco LLC ("Ares Holdco"), Ares Management Corporation ("Ares Management"), Ares Management GP LLC ("Ares Management GP"), Ares Voting LLC ("Ares Voting") and Ares Partners Holdco LLC ("Ares Partners", and together with the ACOF Funds, the ASOF Funds, the ASSF Funds, ACOF Investment Management, ASOF Investment Management, ASSF Operating Manager IV, Ares Management LLC, Ares Management Holdings, Ares Holdco, Ares Management, Ares Management GP, and Ares Voting, the "Reporting Persons"). Due to the electronic system's limitation of 10 Reporting Persons per joint filing, this statement is being filed in five parts.

F7 · ownership.nature: The Reporting Persons collectively beneficially own, or may be deemed to beneficially own, in the aggregate 36,955,132 shares of Common Stock by reason of the direct or indirect beneficial ownership of such shares as follows: (i) ACOF VI Frontier AIV A1 owns 254,175 shares of Common Stock; (ii) ACOF VI Frontier AIV A2 owns 91,148 shares of Common Stock; (iii) ACOF VI Frontier AIV A3 owns 21,267 shares of Common Stock; (iv) ACOF VI Frontier AIV A4 owns 276,484 shares of Common Stock; (v) ACOF VI Frontier AIV A5 owns 303,828 shares of Common Stock; (vi) ACOF VI Frontier AIV A6 owns 170,144 shares of Common Stock; (vii) ACOF VI Frontier AIV A7 owns 307,911 shares of Common Stock; (viii) ACOF VI Frontier AIV A8 owns shares 309,297 of Common Stock; (ix) ACOF VI Frontier AIV A9 owns 290,461 shares of Common Stock; (x) ACOF VI Frontier AIV A10 owns 91,848 shares of Common Stock; (xi) ACOF VI Frontier AIV B1 owns 15,331,737 shares of Common Stock; (continued in next footnote)

F8 · ownership.nature: (xii) ASOF Frontier AIV A1 owns 105,592 shares of Common Stock; (xiii) ASOF Frontier AIV A2 owns 18,032 shares of Common Stock; (xiv) ASOF Frontier AIV A3 owns 830,837 shares of Common Stock; (xv) ASOF Frontier AIV A4 owns 281,844 shares of Common Stock; (xvi) ASOF Frontier AIV A5 owns 167,160 shares of Common Stock; (xvii) ASOF Frontier AIV A6 owns 292,124 shares of Common Stock; (xviii) ASOF Frontier AIV A7 owns 289,417 shares of Common Stock; (xix) ASOF Frontier AIV A8 owns 238,026 shares of Common Stock; (xx) ASOF Frontier AIV A9 owns 360,644 shares of Common Stock; (xxi) ASOF Frontier AIV A10 owns 259,665 shares of Common Stock; (xxii) ASOF Frontier AIV A11 owns 245,236 shares of Common Stock; (xxiii) ASOF Frontier AIV B1 owns 9,597,579 shares of Common Stock; (continued in next footnote)

F9 · ownership.nature: (xxiv) ASOF II Frontier Holdings 1 owns 927,604 shares of Common Stock, (xxv) ASOF II Frontier Holdings 2 owns 44,709 shares of Common Stock, (xxvi) ASOF II Frontier Holdings 3 owns 49,797 shares of Common Stock, (xxvii) ASOF II Frontier Holdings 4 owns 48,264 shares of Common Stock, (xxviii) ASOF II Frontier Holdings 5 owns 47,801 shares of Common Stock, (xxix) ASOF II Frontier Holdings 6 owns 50,657 shares of Common Stock, (xxx) ASOF II Frontier Holdings 7 owns 50,783 shares of Common Stock, (xxxi) ASOF II A (DE) Frontier Holdings 1 owns 222,209 shares of Common Stock; (xxxii) ASOF II A (DE) Frontier Holdings 2 owns 8,176 shares of Common Stock; (xxxiii) ASSF IV AIV B Holdings III owns 2,694,243 shares of Common Stock and (xxxiv) ASSF IV AIV B directly or indirectly owns 5,348,289 shares of Common Stock.

F10 · ownership.nature: Ares Partners is the sole member of each of Ares Voting and Ares Management GP, which are respectively the holders of the Class B and Class C common stock of Ares Management, which common stock allows them, collectively, to generally have the majority of the votes on any matter submitted to the stockholders of Ares Management if certain conditions are met. Ares Management is the sole member of Ares Holdco, which is the general partner of Ares Management Holdings, which is the sole member of Ares Management LLC, which is: (a) the sole member of ACOF Investment Management, which is the manager of the ACOF Funds, (b) the sole member of ASOF Investment Management, which is the manager of the ASOF Funds, and (c) the general partner of ASSF Operating Manager IV, which is the manager of the ASSF Funds.

F11 · ownership.nature: Ares Partners is managed by a board of managers, which is composed of Michael J Arougheti, Ryan Berry, R. Kipp deVeer, David B. Kaplan, Antony P. Ressler and Bennett Rosenthal (collectively, the "Board Members"). Mr. Ressler generally has veto authority over Board Members' decisions.

F12 · ownership.nature: Each of the Reporting Persons, and the Board Members, and the other directors, officers, partners, stockholders, members and managers of the Reporting Persons, expressly disclaims beneficial ownership of the Common Stock, except to the extent of any pecuniary interest therein, and this Form 4 shall not be deemed an admission that any such person or entity is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purposes.

SEC source: 0001104659-23-038294 · tm2310833-1_4seq1.xml · nonDerivative · entry 1

ARES MANAGEMENT LLC · CIK 0001259313 · 10% owner

ACOF VI Frontier AIV A1, L.P. · CIK 0001862494 · 10% owner

ACOF VI Frontier AIV A2, L.P. · CIK 0001862499 · 10% owner

ACOF VI Frontier AIV A3, L.P. · CIK 0001862534 · 10% owner

ACOF VI Frontier AIV A4, L.P. · CIK 0001862529 · 10% owner

ACOF VI Frontier AIV A5, L.P. · CIK 0001862526 · 10% owner

ACOF VI Frontier AIV A6, L.P. · CIK 0001862483 · 10% owner

ACOF VI Frontier AIV A7, L.P. · CIK 0001862482 · 10% owner

ACOF VI Frontier AIV A8, L.P. · CIK 0001862505 · 10% owner

ACOF VI Frontier AIV A9, L.P. · CIK 0001862533 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnotes

Disclosed balance after: 36,455,132

F1 · balance_after: This statement is being filed by ACOF VI Frontier AIV A1, L.P. ("ACOF VI Frontier AIV A1"), ACOF VI Frontier AIV A2, L.P. ("ACOF VI Frontier AIV A2"), ACOF VI Frontier AIV A3, L.P. ("ACOF VI Frontier AIV A3"), ACOF VI Frontier AIV A4, L.P. ("ACOF VI Frontier AIV A4"), ACOF VI Frontier AIV A5, L.P. ("ACOF VI Frontier AIV A5"), ACOF VI Frontier AIV A6, L.P. ("ACOF VI Frontier AIV A6"), ACOF VI Frontier AIV A7, L.P. ("ACOF VI Frontier AIV A7"), ACOF VI Frontier AIV A8, L.P. ("ACOF VI Frontier AIV A8"), ACOF VI Frontier AIV A9, L.P. ("ACOF VI Frontier AIV A9"), ACOF VI Frontier AIV A10, L.P. ("ACOF VI Frontier AIV A10"), and ACOF VI Frontier AIV B1, L.P. ("ACOF VI Frontier AIV B1", together with the foregoing entities, the "ACOF Funds"), (continued in next footnote)

F2 · balance_after: ASOF Frontier AIV A1, L.P. ("ASOF Frontier AIV A1"), ASOF Frontier AIV A2, L.P. ("ASOF Frontier AIV A2"), ASOF Frontier AIV A3, L.P. ("ASOF Frontier AIV A3"), ASOF Frontier AIV A4, L.P. ("ASOF Frontier AIV A4"), ASOF Frontier AIV A5, L.P. ("ASOF Frontier AIV A5"), ASOF Frontier AIV A6, L.P. ("ASOF Frontier AIV A6"), ASOF Frontier AIV A7, L.P. ("ASOF Frontier AIV A7"), ASOF Frontier AIV A8, L.P. ("ASOF Frontier AIV A8"), ASOF Frontier AIV A9, L.P. ("ASOF Frontier AIV A9"), ASOF Frontier AIV A10, L.P. ("ASOF Frontier AIV A10"), ASOF Frontier AIV A11, L.P. ("ASOF Frontier AIV A11"), ASOF Frontier AIV B1, L.P. ("ASOF Frontier AIV B1"), (continued in next footnote)

F3 · balance_after: ASOF II Frontier Holdings 1 L.P. ("ASOF II Frontier Holdings 1"), ASOF II Frontier Holdings 2 L.P. ("ASOF II Frontier Holdings 2"), ASOF II Frontier Holdings 3 L.P. ("ASOF II Frontier Holdings 3"), ASOF II Frontier Holdings 4 L.P. ("ASOF II Frontier Holdings 4"), ASOF II Frontier Holdings 5 L.P. ("ASOF II Frontier Holdings 5"), ASOF II Frontier Holdings 6 L.P. ("ASOF II Frontier Holdings 6"), (continued in next footnote)

F4 · balance_after: ASOF II Frontier Holdings 7 L.P. ("ASOF II Frontier Holdings 7"), ASOF II A (DE) Frontier Holdings 1 L.P. ("ASOF II A (DE) Frontier Holdings 1") and ASOF II A (DE) Frontier Holdings 2 L.P. ("ASOF II A (DE) Frontier Holdings 2", and together with ASOF Frontier AIV A1, ASOF Frontier AIV A2, ASOF Frontier AIV A3, ASOF Frontier AIV A4, ASOF Frontier AIV A5, ASOF Frontier AIV A6, ASOF Frontier AIV A7, ASOF Frontier AIV A8, ASOF Frontier AIV A9, ASOF Frontier AIV A10, and ASOF Frontier AIV A11, ASOF II Frontier Holdings 1, ASOF II Frontier Holdings 2, ASOF II Frontier Holdings 3, ASOF II Frontier Holdings 4, ASOF II Frontier Holdings 5, ASOF II Frontier Holdings 6, ASOF II Frontier Holdings 7 and ASOF II A (DE) Frontier Holdings 1, the "ASOF Funds"), (continued in next footnote)

F5 · balance_after: ASSF IV AIV B Holdings III, L.P. ("ASSF IV AIV B Holdings III"), ASSF IV AIV B, L.P. ("ASSF IV AIV B", and together with ASSF IV AIV B Holdings III, the "ASSF Funds"), ACOF Investment Management LLC ("ACOF Investment Management"), ASOF Investment Management LLC ("ASOF Investment Management"), ASSF Operating Manager IV, L.P. ("ASSF Operating Manager IV"), (continued in next footnote)

F6 · balance_after: Ares Management LLC, Ares Management Holdings L.P. ("Ares Management Holdings"), Ares Holdco LLC ("Ares Holdco"), Ares Management Corporation ("Ares Management"), Ares Management GP LLC ("Ares Management GP"), Ares Voting LLC ("Ares Voting") and Ares Partners Holdco LLC ("Ares Partners", and together with the ACOF Funds, the ASOF Funds, the ASSF Funds, ACOF Investment Management, ASOF Investment Management, ASSF Operating Manager IV, Ares Management LLC, Ares Management Holdings, Ares Holdco, Ares Management, Ares Management GP, and Ares Voting, the "Reporting Persons"). Due to the electronic system's limitation of 10 Reporting Persons per joint filing, this statement is being filed in five parts.

F7 · balance_after: The Reporting Persons collectively beneficially own, or may be deemed to beneficially own, in the aggregate 36,955,132 shares of Common Stock by reason of the direct or indirect beneficial ownership of such shares as follows: (i) ACOF VI Frontier AIV A1 owns 254,175 shares of Common Stock; (ii) ACOF VI Frontier AIV A2 owns 91,148 shares of Common Stock; (iii) ACOF VI Frontier AIV A3 owns 21,267 shares of Common Stock; (iv) ACOF VI Frontier AIV A4 owns 276,484 shares of Common Stock; (v) ACOF VI Frontier AIV A5 owns 303,828 shares of Common Stock; (vi) ACOF VI Frontier AIV A6 owns 170,144 shares of Common Stock; (vii) ACOF VI Frontier AIV A7 owns 307,911 shares of Common Stock; (viii) ACOF VI Frontier AIV A8 owns shares 309,297 of Common Stock; (ix) ACOF VI Frontier AIV A9 owns 290,461 shares of Common Stock; (x) ACOF VI Frontier AIV A10 owns 91,848 shares of Common Stock; (xi) ACOF VI Frontier AIV B1 owns 15,331,737 shares of Common Stock; (continued in next footnote)

F8 · balance_after: (xii) ASOF Frontier AIV A1 owns 105,592 shares of Common Stock; (xiii) ASOF Frontier AIV A2 owns 18,032 shares of Common Stock; (xiv) ASOF Frontier AIV A3 owns 830,837 shares of Common Stock; (xv) ASOF Frontier AIV A4 owns 281,844 shares of Common Stock; (xvi) ASOF Frontier AIV A5 owns 167,160 shares of Common Stock; (xvii) ASOF Frontier AIV A6 owns 292,124 shares of Common Stock; (xviii) ASOF Frontier AIV A7 owns 289,417 shares of Common Stock; (xix) ASOF Frontier AIV A8 owns 238,026 shares of Common Stock; (xx) ASOF Frontier AIV A9 owns 360,644 shares of Common Stock; (xxi) ASOF Frontier AIV A10 owns 259,665 shares of Common Stock; (xxii) ASOF Frontier AIV A11 owns 245,236 shares of Common Stock; (xxiii) ASOF Frontier AIV B1 owns 9,597,579 shares of Common Stock; (continued in next footnote)

F9 · balance_after: (xxiv) ASOF II Frontier Holdings 1 owns 927,604 shares of Common Stock, (xxv) ASOF II Frontier Holdings 2 owns 44,709 shares of Common Stock, (xxvi) ASOF II Frontier Holdings 3 owns 49,797 shares of Common Stock, (xxvii) ASOF II Frontier Holdings 4 owns 48,264 shares of Common Stock, (xxviii) ASOF II Frontier Holdings 5 owns 47,801 shares of Common Stock, (xxix) ASOF II Frontier Holdings 6 owns 50,657 shares of Common Stock, (xxx) ASOF II Frontier Holdings 7 owns 50,783 shares of Common Stock, (xxxi) ASOF II A (DE) Frontier Holdings 1 owns 222,209 shares of Common Stock; (xxxii) ASOF II A (DE) Frontier Holdings 2 owns 8,176 shares of Common Stock; (xxxiii) ASSF IV AIV B Holdings III owns 2,694,243 shares of Common Stock and (xxxiv) ASSF IV AIV B directly or indirectly owns 5,348,289 shares of Common Stock.

F10 · balance_after: Ares Partners is the sole member of each of Ares Voting and Ares Management GP, which are respectively the holders of the Class B and Class C common stock of Ares Management, which common stock allows them, collectively, to generally have the majority of the votes on any matter submitted to the stockholders of Ares Management if certain conditions are met. Ares Management is the sole member of Ares Holdco, which is the general partner of Ares Management Holdings, which is the sole member of Ares Management LLC, which is: (a) the sole member of ACOF Investment Management, which is the manager of the ACOF Funds, (b) the sole member of ASOF Investment Management, which is the manager of the ASOF Funds, and (c) the general partner of ASSF Operating Manager IV, which is the manager of the ASSF Funds.

F11 · balance_after: Ares Partners is managed by a board of managers, which is composed of Michael J Arougheti, Ryan Berry, R. Kipp deVeer, David B. Kaplan, Antony P. Ressler and Bennett Rosenthal (collectively, the "Board Members"). Mr. Ressler generally has veto authority over Board Members' decisions.

F12 · balance_after: Each of the Reporting Persons, and the Board Members, and the other directors, officers, partners, stockholders, members and managers of the Reporting Persons, expressly disclaims beneficial ownership of the Common Stock, except to the extent of any pecuniary interest therein, and this Form 4 shall not be deemed an admission that any such person or entity is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purposes.

F1 · ownership.nature: This statement is being filed by ACOF VI Frontier AIV A1, L.P. ("ACOF VI Frontier AIV A1"), ACOF VI Frontier AIV A2, L.P. ("ACOF VI Frontier AIV A2"), ACOF VI Frontier AIV A3, L.P. ("ACOF VI Frontier AIV A3"), ACOF VI Frontier AIV A4, L.P. ("ACOF VI Frontier AIV A4"), ACOF VI Frontier AIV A5, L.P. ("ACOF VI Frontier AIV A5"), ACOF VI Frontier AIV A6, L.P. ("ACOF VI Frontier AIV A6"), ACOF VI Frontier AIV A7, L.P. ("ACOF VI Frontier AIV A7"), ACOF VI Frontier AIV A8, L.P. ("ACOF VI Frontier AIV A8"), ACOF VI Frontier AIV A9, L.P. ("ACOF VI Frontier AIV A9"), ACOF VI Frontier AIV A10, L.P. ("ACOF VI Frontier AIV A10"), and ACOF VI Frontier AIV B1, L.P. ("ACOF VI Frontier AIV B1", together with the foregoing entities, the "ACOF Funds"), (continued in next footnote)

F2 · ownership.nature: ASOF Frontier AIV A1, L.P. ("ASOF Frontier AIV A1"), ASOF Frontier AIV A2, L.P. ("ASOF Frontier AIV A2"), ASOF Frontier AIV A3, L.P. ("ASOF Frontier AIV A3"), ASOF Frontier AIV A4, L.P. ("ASOF Frontier AIV A4"), ASOF Frontier AIV A5, L.P. ("ASOF Frontier AIV A5"), ASOF Frontier AIV A6, L.P. ("ASOF Frontier AIV A6"), ASOF Frontier AIV A7, L.P. ("ASOF Frontier AIV A7"), ASOF Frontier AIV A8, L.P. ("ASOF Frontier AIV A8"), ASOF Frontier AIV A9, L.P. ("ASOF Frontier AIV A9"), ASOF Frontier AIV A10, L.P. ("ASOF Frontier AIV A10"), ASOF Frontier AIV A11, L.P. ("ASOF Frontier AIV A11"), ASOF Frontier AIV B1, L.P. ("ASOF Frontier AIV B1"), (continued in next footnote)

F3 · ownership.nature: ASOF II Frontier Holdings 1 L.P. ("ASOF II Frontier Holdings 1"), ASOF II Frontier Holdings 2 L.P. ("ASOF II Frontier Holdings 2"), ASOF II Frontier Holdings 3 L.P. ("ASOF II Frontier Holdings 3"), ASOF II Frontier Holdings 4 L.P. ("ASOF II Frontier Holdings 4"), ASOF II Frontier Holdings 5 L.P. ("ASOF II Frontier Holdings 5"), ASOF II Frontier Holdings 6 L.P. ("ASOF II Frontier Holdings 6"), (continued in next footnote)

F4 · ownership.nature: ASOF II Frontier Holdings 7 L.P. ("ASOF II Frontier Holdings 7"), ASOF II A (DE) Frontier Holdings 1 L.P. ("ASOF II A (DE) Frontier Holdings 1") and ASOF II A (DE) Frontier Holdings 2 L.P. ("ASOF II A (DE) Frontier Holdings 2", and together with ASOF Frontier AIV A1, ASOF Frontier AIV A2, ASOF Frontier AIV A3, ASOF Frontier AIV A4, ASOF Frontier AIV A5, ASOF Frontier AIV A6, ASOF Frontier AIV A7, ASOF Frontier AIV A8, ASOF Frontier AIV A9, ASOF Frontier AIV A10, and ASOF Frontier AIV A11, ASOF II Frontier Holdings 1, ASOF II Frontier Holdings 2, ASOF II Frontier Holdings 3, ASOF II Frontier Holdings 4, ASOF II Frontier Holdings 5, ASOF II Frontier Holdings 6, ASOF II Frontier Holdings 7 and ASOF II A (DE) Frontier Holdings 1, the "ASOF Funds"), (continued in next footnote)

F5 · ownership.nature: ASSF IV AIV B Holdings III, L.P. ("ASSF IV AIV B Holdings III"), ASSF IV AIV B, L.P. ("ASSF IV AIV B", and together with ASSF IV AIV B Holdings III, the "ASSF Funds"), ACOF Investment Management LLC ("ACOF Investment Management"), ASOF Investment Management LLC ("ASOF Investment Management"), ASSF Operating Manager IV, L.P. ("ASSF Operating Manager IV"), (continued in next footnote)

F6 · ownership.nature: Ares Management LLC, Ares Management Holdings L.P. ("Ares Management Holdings"), Ares Holdco LLC ("Ares Holdco"), Ares Management Corporation ("Ares Management"), Ares Management GP LLC ("Ares Management GP"), Ares Voting LLC ("Ares Voting") and Ares Partners Holdco LLC ("Ares Partners", and together with the ACOF Funds, the ASOF Funds, the ASSF Funds, ACOF Investment Management, ASOF Investment Management, ASSF Operating Manager IV, Ares Management LLC, Ares Management Holdings, Ares Holdco, Ares Management, Ares Management GP, and Ares Voting, the "Reporting Persons"). Due to the electronic system's limitation of 10 Reporting Persons per joint filing, this statement is being filed in five parts.

F7 · ownership.nature: The Reporting Persons collectively beneficially own, or may be deemed to beneficially own, in the aggregate 36,955,132 shares of Common Stock by reason of the direct or indirect beneficial ownership of such shares as follows: (i) ACOF VI Frontier AIV A1 owns 254,175 shares of Common Stock; (ii) ACOF VI Frontier AIV A2 owns 91,148 shares of Common Stock; (iii) ACOF VI Frontier AIV A3 owns 21,267 shares of Common Stock; (iv) ACOF VI Frontier AIV A4 owns 276,484 shares of Common Stock; (v) ACOF VI Frontier AIV A5 owns 303,828 shares of Common Stock; (vi) ACOF VI Frontier AIV A6 owns 170,144 shares of Common Stock; (vii) ACOF VI Frontier AIV A7 owns 307,911 shares of Common Stock; (viii) ACOF VI Frontier AIV A8 owns shares 309,297 of Common Stock; (ix) ACOF VI Frontier AIV A9 owns 290,461 shares of Common Stock; (x) ACOF VI Frontier AIV A10 owns 91,848 shares of Common Stock; (xi) ACOF VI Frontier AIV B1 owns 15,331,737 shares of Common Stock; (continued in next footnote)

F8 · ownership.nature: (xii) ASOF Frontier AIV A1 owns 105,592 shares of Common Stock; (xiii) ASOF Frontier AIV A2 owns 18,032 shares of Common Stock; (xiv) ASOF Frontier AIV A3 owns 830,837 shares of Common Stock; (xv) ASOF Frontier AIV A4 owns 281,844 shares of Common Stock; (xvi) ASOF Frontier AIV A5 owns 167,160 shares of Common Stock; (xvii) ASOF Frontier AIV A6 owns 292,124 shares of Common Stock; (xviii) ASOF Frontier AIV A7 owns 289,417 shares of Common Stock; (xix) ASOF Frontier AIV A8 owns 238,026 shares of Common Stock; (xx) ASOF Frontier AIV A9 owns 360,644 shares of Common Stock; (xxi) ASOF Frontier AIV A10 owns 259,665 shares of Common Stock; (xxii) ASOF Frontier AIV A11 owns 245,236 shares of Common Stock; (xxiii) ASOF Frontier AIV B1 owns 9,597,579 shares of Common Stock; (continued in next footnote)

F9 · ownership.nature: (xxiv) ASOF II Frontier Holdings 1 owns 927,604 shares of Common Stock, (xxv) ASOF II Frontier Holdings 2 owns 44,709 shares of Common Stock, (xxvi) ASOF II Frontier Holdings 3 owns 49,797 shares of Common Stock, (xxvii) ASOF II Frontier Holdings 4 owns 48,264 shares of Common Stock, (xxviii) ASOF II Frontier Holdings 5 owns 47,801 shares of Common Stock, (xxix) ASOF II Frontier Holdings 6 owns 50,657 shares of Common Stock, (xxx) ASOF II Frontier Holdings 7 owns 50,783 shares of Common Stock, (xxxi) ASOF II A (DE) Frontier Holdings 1 owns 222,209 shares of Common Stock; (xxxii) ASOF II A (DE) Frontier Holdings 2 owns 8,176 shares of Common Stock; (xxxiii) ASSF IV AIV B Holdings III owns 2,694,243 shares of Common Stock and (xxxiv) ASSF IV AIV B directly or indirectly owns 5,348,289 shares of Common Stock.

F10 · ownership.nature: Ares Partners is the sole member of each of Ares Voting and Ares Management GP, which are respectively the holders of the Class B and Class C common stock of Ares Management, which common stock allows them, collectively, to generally have the majority of the votes on any matter submitted to the stockholders of Ares Management if certain conditions are met. Ares Management is the sole member of Ares Holdco, which is the general partner of Ares Management Holdings, which is the sole member of Ares Management LLC, which is: (a) the sole member of ACOF Investment Management, which is the manager of the ACOF Funds, (b) the sole member of ASOF Investment Management, which is the manager of the ASOF Funds, and (c) the general partner of ASSF Operating Manager IV, which is the manager of the ASSF Funds.

F11 · ownership.nature: Ares Partners is managed by a board of managers, which is composed of Michael J Arougheti, Ryan Berry, R. Kipp deVeer, David B. Kaplan, Antony P. Ressler and Bennett Rosenthal (collectively, the "Board Members"). Mr. Ressler generally has veto authority over Board Members' decisions.

F12 · ownership.nature: Each of the Reporting Persons, and the Board Members, and the other directors, officers, partners, stockholders, members and managers of the Reporting Persons, expressly disclaims beneficial ownership of the Common Stock, except to the extent of any pecuniary interest therein, and this Form 4 shall not be deemed an admission that any such person or entity is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purposes.

SEC source: 0001104659-23-033877 · tm239621-7_4seq1.xml · nonDerivative · entry 2

ARES MANAGEMENT LLC · CIK 0001259313 · 10% owner

ACOF VI Frontier AIV A1, L.P. · CIK 0001862494 · 10% owner

ACOF VI Frontier AIV A2, L.P. · CIK 0001862499 · 10% owner

ACOF VI Frontier AIV A3, L.P. · CIK 0001862534 · 10% owner

ACOF VI Frontier AIV A4, L.P. · CIK 0001862529 · 10% owner

ACOF VI Frontier AIV A5, L.P. · CIK 0001862526 · 10% owner

ACOF VI Frontier AIV A6, L.P. · CIK 0001862483 · 10% owner

ACOF VI Frontier AIV A7, L.P. · CIK 0001862482 · 10% owner

ACOF VI Frontier AIV A8, L.P. · CIK 0001862505 · 10% owner

ACOF VI Frontier AIV A9, L.P. · CIK 0001862533 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 35,705,132

F1 · balance_after: This statement is being filed by ACOF VI Frontier AIV A1, L.P. ("ACOF VI Frontier AIV A1"), ACOF VI Frontier AIV A2, L.P. ("ACOF VI Frontier AIV A2"), ACOF VI Frontier AIV A3, L.P. ("ACOF VI Frontier AIV A3"), ACOF VI Frontier AIV A4, L.P. ("ACOF VI Frontier AIV A4"), ACOF VI Frontier AIV A5, L.P. ("ACOF VI Frontier AIV A5"), ACOF VI Frontier AIV A6, L.P. ("ACOF VI Frontier AIV A6"), ACOF VI Frontier AIV A7, L.P. ("ACOF VI Frontier AIV A7"), ACOF VI Frontier AIV A8, L.P. ("ACOF VI Frontier AIV A8"), ACOF VI Frontier AIV A9, L.P. ("ACOF VI Frontier AIV A9"), ACOF VI Frontier AIV A10, L.P. ("ACOF VI Frontier AIV A10"), and ACOF VI Frontier AIV B1, L.P. ("ACOF VI Frontier AIV B1", together with the foregoing entities, the "ACOF Funds"), (continued in next footnote)

F2 · balance_after: ASOF Frontier AIV A1, L.P. ("ASOF Frontier AIV A1"), ASOF Frontier AIV A2, L.P. ("ASOF Frontier AIV A2"), ASOF Frontier AIV A3, L.P. ("ASOF Frontier AIV A3"), ASOF Frontier AIV A4, L.P. ("ASOF Frontier AIV A4"), ASOF Frontier AIV A5, L.P. ("ASOF Frontier AIV A5"), ASOF Frontier AIV A6, L.P. ("ASOF Frontier AIV A6"), ASOF Frontier AIV A7, L.P. ("ASOF Frontier AIV A7"), ASOF Frontier AIV A8, L.P. ("ASOF Frontier AIV A8"), ASOF Frontier AIV A9, L.P. ("ASOF Frontier AIV A9"), ASOF Frontier AIV A10, L.P. ("ASOF Frontier AIV A10"), ASOF Frontier AIV A11, L.P. ("ASOF Frontier AIV A11"), ASOF Frontier AIV B1, L.P. ("ASOF Frontier AIV B1"), (continued in next footnote)

F3 · balance_after: ASOF II Frontier Holdings 1 L.P. ("ASOF II Frontier Holdings 1"), ASOF II Frontier Holdings 2 L.P. ("ASOF II Frontier Holdings 2"), ASOF II Frontier Holdings 3 L.P. ("ASOF II Frontier Holdings 3"), ASOF II Frontier Holdings 4 L.P. ("ASOF II Frontier Holdings 4"), ASOF II Frontier Holdings 5 L.P. ("ASOF II Frontier Holdings 5"), ASOF II Frontier Holdings 6 L.P. ("ASOF II Frontier Holdings 6"), (continued in next footnote)

F4 · balance_after: ASOF II Frontier Holdings 7 L.P. ("ASOF II Frontier Holdings 7"), ASOF II A (DE) Frontier Holdings 1 L.P. ("ASOF II A (DE) Frontier Holdings 1") and ASOF II A (DE) Frontier Holdings 2 L.P. ("ASOF II A (DE) Frontier Holdings 2", and together with ASOF Frontier AIV A1, ASOF Frontier AIV A2, ASOF Frontier AIV A3, ASOF Frontier AIV A4, ASOF Frontier AIV A5, ASOF Frontier AIV A6, ASOF Frontier AIV A7, ASOF Frontier AIV A8, ASOF Frontier AIV A9, ASOF Frontier AIV A10, and ASOF Frontier AIV A11, ASOF II Frontier Holdings 1, ASOF II Frontier Holdings 2, ASOF II Frontier Holdings 3, ASOF II Frontier Holdings 4, ASOF II Frontier Holdings 5, ASOF II Frontier Holdings 6, ASOF II Frontier Holdings 7 and ASOF II A (DE) Frontier Holdings 1, the "ASOF Funds"), (continued in next footnote)

F5 · balance_after: ASSF IV AIV B Holdings III, L.P. ("ASSF IV AIV B Holdings III"), ASSF IV AIV B, L.P. ("ASSF IV AIV B", and together with ASSF IV AIV B Holdings III, the "ASSF Funds"), ACOF Investment Management LLC ("ACOF Investment Management"), ASOF Investment Management LLC ("ASOF Investment Management"), ASSF Operating Manager IV, L.P. ("ASSF Operating Manager IV"), (continued in next footnote)

F6 · balance_after: Ares Management LLC, Ares Management Holdings L.P. ("Ares Management Holdings"), Ares Holdco LLC ("Ares Holdco"), Ares Management Corporation ("Ares Management"), Ares Management GP LLC ("Ares Management GP"), Ares Voting LLC ("Ares Voting") and Ares Partners Holdco LLC ("Ares Partners", and together with the ACOF Funds, the ASOF Funds, the ASSF Funds, ACOF Investment Management, ASOF Investment Management, ASSF Operating Manager IV, Ares Management LLC, Ares Management Holdings, Ares Holdco, Ares Management, Ares Management GP, and Ares Voting, the "Reporting Persons"). Due to the electronic system's limitation of 10 Reporting Persons per joint filing, this statement is being filed in five parts.

F7 · balance_after: The Reporting Persons collectively beneficially own, or may be deemed to beneficially own, in the aggregate 35,705,132 shares of Common Stock by reason of the direct or indirect beneficial ownership of such shares as follows: (i) ACOF VI Frontier AIV A1 owns 249,805 shares of Common Stock; (ii) ACOF VI Frontier AIV A2 owns 89,581 shares of Common Stock; (iii) ACOF VI Frontier AIV A3 owns 20,902 shares of Common Stock; (iv) ACOF VI Frontier AIV A4 owns 271,730 shares of Common Stock; (v) ACOF VI Frontier AIV A5 owns 298,604 shares of Common Stock; (vi) ACOF VI Frontier AIV A6 owns 167,219 shares of Common Stock; (vii) ACOF VI Frontier AIV A7 owns 302,616 shares of Common Stock; (viii) ACOF VI Frontier AIV A8 owns shares 303,979 of Common Stock; (ix) ACOF VI Frontier AIV A9 owns 285,466 shares of Common Stock; (x) ACOF VI Frontier AIV A10 owns 90,268 shares of Common Stock; (xi) ACOF VI Frontier AIV B1 owns 15,068,130 shares of Common Stock; (continued in next footnote)

F8 · balance_after: (xii) ASOF Frontier AIV A1 owns 105,592 shares of Common Stock; (xiii) ASOF Frontier AIV A2 owns 18,032 shares of Common Stock; (xiv) ASOF Frontier AIV A3 owns 830,837 shares of Common Stock; (xv) ASOF Frontier AIV A4 owns 281,844 shares of Common Stock; (xvi) ASOF Frontier AIV A5 owns 167,160 shares of Common Stock; (xvii) ASOF Frontier AIV A6 owns 292,124 shares of Common Stock; (xviii) ASOF Frontier AIV A7 owns 289,417 shares of Common Stock; (xix) ASOF Frontier AIV A8 owns 238,026 shares of Common Stock; (xx) ASOF Frontier AIV A9 owns 360,644 shares of Common Stock; (xxi) ASOF Frontier AIV A10 owns 259,665 shares of Common Stock; (xxii) ASOF Frontier AIV A11 owns 245,236 shares of Common Stock; (xxiii) ASOF Frontier AIV B1 owns 9,597,579 shares of Common Stock; (continued in next footnote)

F9 · balance_after: (xxiv) ASOF II Frontier Holdings 1 owns 319,862 shares of Common Stock, (xxv) ASOF II Frontier Holdings 2 owns 15,416 shares of Common Stock, (xxvi) ASOF II Frontier Holdings 3 owns 17,170 shares of Common Stock, (xxvii) ASOF II Frontier Holdings 4 owns 16,644 shares of Common Stock, (xxviii) ASOF II Frontier Holdings 5 owns 16,485 shares of Common Stock, (xxix) ASOF II Frontier Holdings 6 owns 17,469 shares of Common Stock, (xxx) ASOF II Frontier Holdings 7 owns 17,513 shares of Common Stock, (xxxi) ASOF II A (DE) Frontier Holdings 1 owns 76,623 shares of Common Stock; (xxxii) ASOF II A (DE) Frontier Holdings 2 owns 2,818 shares of Common Stock; (xxxiii) ASSF IV AIV B Holdings III owns 2,694,243 shares of Common Stock and (xxxiv) ASSF IV AIV B directly or indirectly owns 5,348,289 shares of Common Stock.

F10 · balance_after: Ares Partners is the sole member of each of Ares Voting and Ares Management GP, which are respectively the holders of the Class B and Class C common stock of Ares Management, which common stock allows them, collectively, to generally have the majority of the votes on any matter submitted to the stockholders of Ares Management if certain conditions are met. Ares Management is the sole member of Ares Holdco, which is the general partner of Ares Management Holdings, which is the sole member of Ares Management LLC, which is: (a) the sole member of ACOF Investment Management, which is the manager of the ACOF Funds, (b) the sole member of ASOF Investment Management, which is the manager of the ASOF Funds, and (c) the general partner of ASSF Operating Manager IV, which is the manager of the ASSF Funds.

F11 · balance_after: Ares Partners is managed by a board of managers, which is composed of Michael J Arougheti, Ryan Berry, R. Kipp deVeer, David B. Kaplan, Antony P. Ressler and Bennett Rosenthal (collectively, the "Board Members"). Mr. Ressler generally has veto authority over Board Members' decisions.

F12 · balance_after: Each of the Reporting Persons, and the Board Members, and the other directors, officers, partners, stockholders, members and managers of the Reporting Persons, expressly disclaims beneficial ownership of the Common Stock, except to the extent of any pecuniary interest therein, and this Form 4 shall not be deemed an admission that any such person or entity is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purposes.

F1 · ownership.nature: This statement is being filed by ACOF VI Frontier AIV A1, L.P. ("ACOF VI Frontier AIV A1"), ACOF VI Frontier AIV A2, L.P. ("ACOF VI Frontier AIV A2"), ACOF VI Frontier AIV A3, L.P. ("ACOF VI Frontier AIV A3"), ACOF VI Frontier AIV A4, L.P. ("ACOF VI Frontier AIV A4"), ACOF VI Frontier AIV A5, L.P. ("ACOF VI Frontier AIV A5"), ACOF VI Frontier AIV A6, L.P. ("ACOF VI Frontier AIV A6"), ACOF VI Frontier AIV A7, L.P. ("ACOF VI Frontier AIV A7"), ACOF VI Frontier AIV A8, L.P. ("ACOF VI Frontier AIV A8"), ACOF VI Frontier AIV A9, L.P. ("ACOF VI Frontier AIV A9"), ACOF VI Frontier AIV A10, L.P. ("ACOF VI Frontier AIV A10"), and ACOF VI Frontier AIV B1, L.P. ("ACOF VI Frontier AIV B1", together with the foregoing entities, the "ACOF Funds"), (continued in next footnote)

F2 · ownership.nature: ASOF Frontier AIV A1, L.P. ("ASOF Frontier AIV A1"), ASOF Frontier AIV A2, L.P. ("ASOF Frontier AIV A2"), ASOF Frontier AIV A3, L.P. ("ASOF Frontier AIV A3"), ASOF Frontier AIV A4, L.P. ("ASOF Frontier AIV A4"), ASOF Frontier AIV A5, L.P. ("ASOF Frontier AIV A5"), ASOF Frontier AIV A6, L.P. ("ASOF Frontier AIV A6"), ASOF Frontier AIV A7, L.P. ("ASOF Frontier AIV A7"), ASOF Frontier AIV A8, L.P. ("ASOF Frontier AIV A8"), ASOF Frontier AIV A9, L.P. ("ASOF Frontier AIV A9"), ASOF Frontier AIV A10, L.P. ("ASOF Frontier AIV A10"), ASOF Frontier AIV A11, L.P. ("ASOF Frontier AIV A11"), ASOF Frontier AIV B1, L.P. ("ASOF Frontier AIV B1"), (continued in next footnote)

F3 · ownership.nature: ASOF II Frontier Holdings 1 L.P. ("ASOF II Frontier Holdings 1"), ASOF II Frontier Holdings 2 L.P. ("ASOF II Frontier Holdings 2"), ASOF II Frontier Holdings 3 L.P. ("ASOF II Frontier Holdings 3"), ASOF II Frontier Holdings 4 L.P. ("ASOF II Frontier Holdings 4"), ASOF II Frontier Holdings 5 L.P. ("ASOF II Frontier Holdings 5"), ASOF II Frontier Holdings 6 L.P. ("ASOF II Frontier Holdings 6"), (continued in next footnote)

F4 · ownership.nature: ASOF II Frontier Holdings 7 L.P. ("ASOF II Frontier Holdings 7"), ASOF II A (DE) Frontier Holdings 1 L.P. ("ASOF II A (DE) Frontier Holdings 1") and ASOF II A (DE) Frontier Holdings 2 L.P. ("ASOF II A (DE) Frontier Holdings 2", and together with ASOF Frontier AIV A1, ASOF Frontier AIV A2, ASOF Frontier AIV A3, ASOF Frontier AIV A4, ASOF Frontier AIV A5, ASOF Frontier AIV A6, ASOF Frontier AIV A7, ASOF Frontier AIV A8, ASOF Frontier AIV A9, ASOF Frontier AIV A10, and ASOF Frontier AIV A11, ASOF II Frontier Holdings 1, ASOF II Frontier Holdings 2, ASOF II Frontier Holdings 3, ASOF II Frontier Holdings 4, ASOF II Frontier Holdings 5, ASOF II Frontier Holdings 6, ASOF II Frontier Holdings 7 and ASOF II A (DE) Frontier Holdings 1, the "ASOF Funds"), (continued in next footnote)

F5 · ownership.nature: ASSF IV AIV B Holdings III, L.P. ("ASSF IV AIV B Holdings III"), ASSF IV AIV B, L.P. ("ASSF IV AIV B", and together with ASSF IV AIV B Holdings III, the "ASSF Funds"), ACOF Investment Management LLC ("ACOF Investment Management"), ASOF Investment Management LLC ("ASOF Investment Management"), ASSF Operating Manager IV, L.P. ("ASSF Operating Manager IV"), (continued in next footnote)

F6 · ownership.nature: Ares Management LLC, Ares Management Holdings L.P. ("Ares Management Holdings"), Ares Holdco LLC ("Ares Holdco"), Ares Management Corporation ("Ares Management"), Ares Management GP LLC ("Ares Management GP"), Ares Voting LLC ("Ares Voting") and Ares Partners Holdco LLC ("Ares Partners", and together with the ACOF Funds, the ASOF Funds, the ASSF Funds, ACOF Investment Management, ASOF Investment Management, ASSF Operating Manager IV, Ares Management LLC, Ares Management Holdings, Ares Holdco, Ares Management, Ares Management GP, and Ares Voting, the "Reporting Persons"). Due to the electronic system's limitation of 10 Reporting Persons per joint filing, this statement is being filed in five parts.

F7 · ownership.nature: The Reporting Persons collectively beneficially own, or may be deemed to beneficially own, in the aggregate 35,705,132 shares of Common Stock by reason of the direct or indirect beneficial ownership of such shares as follows: (i) ACOF VI Frontier AIV A1 owns 249,805 shares of Common Stock; (ii) ACOF VI Frontier AIV A2 owns 89,581 shares of Common Stock; (iii) ACOF VI Frontier AIV A3 owns 20,902 shares of Common Stock; (iv) ACOF VI Frontier AIV A4 owns 271,730 shares of Common Stock; (v) ACOF VI Frontier AIV A5 owns 298,604 shares of Common Stock; (vi) ACOF VI Frontier AIV A6 owns 167,219 shares of Common Stock; (vii) ACOF VI Frontier AIV A7 owns 302,616 shares of Common Stock; (viii) ACOF VI Frontier AIV A8 owns shares 303,979 of Common Stock; (ix) ACOF VI Frontier AIV A9 owns 285,466 shares of Common Stock; (x) ACOF VI Frontier AIV A10 owns 90,268 shares of Common Stock; (xi) ACOF VI Frontier AIV B1 owns 15,068,130 shares of Common Stock; (continued in next footnote)

F8 · ownership.nature: (xii) ASOF Frontier AIV A1 owns 105,592 shares of Common Stock; (xiii) ASOF Frontier AIV A2 owns 18,032 shares of Common Stock; (xiv) ASOF Frontier AIV A3 owns 830,837 shares of Common Stock; (xv) ASOF Frontier AIV A4 owns 281,844 shares of Common Stock; (xvi) ASOF Frontier AIV A5 owns 167,160 shares of Common Stock; (xvii) ASOF Frontier AIV A6 owns 292,124 shares of Common Stock; (xviii) ASOF Frontier AIV A7 owns 289,417 shares of Common Stock; (xix) ASOF Frontier AIV A8 owns 238,026 shares of Common Stock; (xx) ASOF Frontier AIV A9 owns 360,644 shares of Common Stock; (xxi) ASOF Frontier AIV A10 owns 259,665 shares of Common Stock; (xxii) ASOF Frontier AIV A11 owns 245,236 shares of Common Stock; (xxiii) ASOF Frontier AIV B1 owns 9,597,579 shares of Common Stock; (continued in next footnote)

F9 · ownership.nature: (xxiv) ASOF II Frontier Holdings 1 owns 319,862 shares of Common Stock, (xxv) ASOF II Frontier Holdings 2 owns 15,416 shares of Common Stock, (xxvi) ASOF II Frontier Holdings 3 owns 17,170 shares of Common Stock, (xxvii) ASOF II Frontier Holdings 4 owns 16,644 shares of Common Stock, (xxviii) ASOF II Frontier Holdings 5 owns 16,485 shares of Common Stock, (xxix) ASOF II Frontier Holdings 6 owns 17,469 shares of Common Stock, (xxx) ASOF II Frontier Holdings 7 owns 17,513 shares of Common Stock, (xxxi) ASOF II A (DE) Frontier Holdings 1 owns 76,623 shares of Common Stock; (xxxii) ASOF II A (DE) Frontier Holdings 2 owns 2,818 shares of Common Stock; (xxxiii) ASSF IV AIV B Holdings III owns 2,694,243 shares of Common Stock and (xxxiv) ASSF IV AIV B directly or indirectly owns 5,348,289 shares of Common Stock.

F10 · ownership.nature: Ares Partners is the sole member of each of Ares Voting and Ares Management GP, which are respectively the holders of the Class B and Class C common stock of Ares Management, which common stock allows them, collectively, to generally have the majority of the votes on any matter submitted to the stockholders of Ares Management if certain conditions are met. Ares Management is the sole member of Ares Holdco, which is the general partner of Ares Management Holdings, which is the sole member of Ares Management LLC, which is: (a) the sole member of ACOF Investment Management, which is the manager of the ACOF Funds, (b) the sole member of ASOF Investment Management, which is the manager of the ASOF Funds, and (c) the general partner of ASSF Operating Manager IV, which is the manager of the ASSF Funds.

F11 · ownership.nature: Ares Partners is managed by a board of managers, which is composed of Michael J Arougheti, Ryan Berry, R. Kipp deVeer, David B. Kaplan, Antony P. Ressler and Bennett Rosenthal (collectively, the "Board Members"). Mr. Ressler generally has veto authority over Board Members' decisions.

F12 · ownership.nature: Each of the Reporting Persons, and the Board Members, and the other directors, officers, partners, stockholders, members and managers of the Reporting Persons, expressly disclaims beneficial ownership of the Common Stock, except to the extent of any pecuniary interest therein, and this Form 4 shall not be deemed an admission that any such person or entity is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purposes.

SEC source: 0001104659-23-033877 · tm239621-7_4seq1.xml · nonDerivative · entry 1

ARES MANAGEMENT LLC · CIK 0001259313 · 10% owner

ACOF VI Frontier AIV A1, L.P. · CIK 0001862494 · 10% owner

ACOF VI Frontier AIV A2, L.P. · CIK 0001862499 · 10% owner

ACOF VI Frontier AIV A3, L.P. · CIK 0001862534 · 10% owner

ACOF VI Frontier AIV A4, L.P. · CIK 0001862529 · 10% owner

ACOF VI Frontier AIV A5, L.P. · CIK 0001862526 · 10% owner

ACOF VI Frontier AIV A6, L.P. · CIK 0001862483 · 10% owner

ACOF VI Frontier AIV A7, L.P. · CIK 0001862482 · 10% owner

ACOF VI Frontier AIV A8, L.P. · CIK 0001862505 · 10% owner

ACOF VI Frontier AIV A9, L.P. · CIK 0001862533 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 35,623,924

F1 · balance_after: This statement is being filed by ACOF VI Frontier AIV A1, L.P. ("ACOF VI Frontier AIV A1"), ACOF VI Frontier AIV A2, L.P. ("ACOF VI Frontier AIV A2"), ACOF VI Frontier AIV A3, L.P. ("ACOF VI Frontier AIV A3"), ACOF VI Frontier AIV A4, L.P. ("ACOF VI Frontier AIV A4"), ACOF VI Frontier AIV A5, L.P. ("ACOF VI Frontier AIV A5"), ACOF VI Frontier AIV A6, L.P. ("ACOF VI Frontier AIV A6"), ACOF VI Frontier AIV A7, L.P. ("ACOF VI Frontier AIV A7"), ACOF VI Frontier AIV A8, L.P. ("ACOF VI Frontier AIV A8"), ACOF VI Frontier AIV A9, L.P. ("ACOF VI Frontier AIV A9"), ACOF VI Frontier AIV A10, L.P. ("ACOF VI Frontier AIV A10"), and ACOF VI Frontier AIV B1, L.P. ("ACOF VI Frontier AIV B1", together with the foregoing entities, the "ACOF Funds"), (continued in next footnote)

F2 · balance_after: ASOF Frontier AIV A1, L.P. ("ASOF Frontier AIV A1"), ASOF Frontier AIV A2, L.P. ("ASOF Frontier AIV A2"), ASOF Frontier AIV A3, L.P. ("ASOF Frontier AIV A3"), ASOF Frontier AIV A4, L.P. ("ASOF Frontier AIV A4"), ASOF Frontier AIV A5, L.P. ("ASOF Frontier AIV A5"), ASOF Frontier AIV A6, L.P. ("ASOF Frontier AIV A6"), ASOF Frontier AIV A7, L.P. ("ASOF Frontier AIV A7"), ASOF Frontier AIV A8, L.P. ("ASOF Frontier AIV A8"), ASOF Frontier AIV A9, L.P. ("ASOF Frontier AIV A9"), ASOF Frontier AIV A10, L.P. ("ASOF Frontier AIV A10"), ASOF Frontier AIV A11, L.P. ("ASOF Frontier AIV A11"), ASOF Frontier AIV B1, L.P. ("ASOF Frontier AIV B1"), (continued in next footnote)

F3 · balance_after: ASOF II Frontier Holdings 1 L.P. ("ASOF II Frontier Holdings 1"), ASOF II Frontier Holdings 2 L.P. ("ASOF II Frontier Holdings 2"), ASOF II Frontier Holdings 3 L.P. ("ASOF II Frontier Holdings 3"), ASOF II Frontier Holdings 4 L.P. ("ASOF II Frontier Holdings 4"), ASOF II Frontier Holdings 5 L.P. ("ASOF II Frontier Holdings 5"), ASOF II Frontier Holdings 6 L.P. ("ASOF II Frontier Holdings 6"), (continued in next footnote)

F4 · balance_after: ASOF II Frontier Holdings 7 L.P. ("ASOF II Frontier Holdings 7"), ASOF II A (DE) Frontier Holdings 1 L.P. ("ASOF II A (DE) Frontier Holdings 1") and ASOF II A (DE) Frontier Holdings 2 L.P. ("ASOF II A (DE) Frontier Holdings 2", and together with ASOF Frontier AIV A1, ASOF Frontier AIV A2, ASOF Frontier AIV A3, ASOF Frontier AIV A4, ASOF Frontier AIV A5, ASOF Frontier AIV A6, ASOF Frontier AIV A7, ASOF Frontier AIV A8, ASOF Frontier AIV A9, ASOF Frontier AIV A10, and ASOF Frontier AIV A11, ASOF II Frontier Holdings 1, ASOF II Frontier Holdings 2, ASOF II Frontier Holdings 3, ASOF II Frontier Holdings 4, ASOF II Frontier Holdings 5, ASOF II Frontier Holdings 6, ASOF II Frontier Holdings 7 and ASOF II A (DE) Frontier Holdings 1, the "ASOF Funds"), (continued in next footnote)

F5 · balance_after: ASSF IV AIV B Holdings III, L.P. ("ASSF IV AIV B Holdings III"), ASSF IV AIV B, L.P. ("ASSF IV AIV B", and together with ASSF IV AIV B Holdings III, the "ASSF Funds"), ACOF Investment Management LLC ("ACOF Investment Management"), ASOF Investment Management LLC ("ASOF Investment Management"), ASSF Operating Manager IV, L.P. ("ASSF Operating Manager IV"), (continued in next footnote)

F6 · balance_after: Ares Management LLC, Ares Management Holdings L.P. ("Ares Management Holdings"), Ares Holdco LLC ("Ares Holdco"), Ares Management Corporation ("Ares Management"), Ares Management GP LLC ("Ares Management GP"), Ares Voting LLC ("Ares Voting") and Ares Partners Holdco LLC ("Ares Partners", and together with the ACOF Funds, the ASOF Funds, the ASSF Funds, ACOF Investment Management, ASOF Investment Management, ASSF Operating Manager IV, Ares Management LLC, Ares Management Holdings, Ares Holdco, Ares Management, Ares Management GP, and Ares Voting, the "Reporting Persons"). Due to the electronic system's limitation of 10 Reporting Persons per joint filing, this statement is being filed in five parts.

F7 · balance_after: The Reporting Persons collectively beneficially own, or may be deemed to beneficially own, in the aggregate 35,705,132 shares of Common Stock by reason of the direct or indirect beneficial ownership of such shares as follows: (i) ACOF VI Frontier AIV A1 owns 249,805 shares of Common Stock; (ii) ACOF VI Frontier AIV A2 owns 89,581 shares of Common Stock; (iii) ACOF VI Frontier AIV A3 owns 20,902 shares of Common Stock; (iv) ACOF VI Frontier AIV A4 owns 271,730 shares of Common Stock; (v) ACOF VI Frontier AIV A5 owns 298,604 shares of Common Stock; (vi) ACOF VI Frontier AIV A6 owns 167,219 shares of Common Stock; (vii) ACOF VI Frontier AIV A7 owns 302,616 shares of Common Stock; (viii) ACOF VI Frontier AIV A8 owns shares 303,979 of Common Stock; (ix) ACOF VI Frontier AIV A9 owns 285,466 shares of Common Stock; (x) ACOF VI Frontier AIV A10 owns 90,268 shares of Common Stock; (xi) ACOF VI Frontier AIV B1 owns 15,068,130 shares of Common Stock; (continued in next footnote)

F8 · balance_after: (xii) ASOF Frontier AIV A1 owns 105,592 shares of Common Stock; (xiii) ASOF Frontier AIV A2 owns 18,032 shares of Common Stock; (xiv) ASOF Frontier AIV A3 owns 830,837 shares of Common Stock; (xv) ASOF Frontier AIV A4 owns 281,844 shares of Common Stock; (xvi) ASOF Frontier AIV A5 owns 167,160 shares of Common Stock; (xvii) ASOF Frontier AIV A6 owns 292,124 shares of Common Stock; (xviii) ASOF Frontier AIV A7 owns 289,417 shares of Common Stock; (xix) ASOF Frontier AIV A8 owns 238,026 shares of Common Stock; (xx) ASOF Frontier AIV A9 owns 360,644 shares of Common Stock; (xxi) ASOF Frontier AIV A10 owns 259,665 shares of Common Stock; (xxii) ASOF Frontier AIV A11 owns 245,236 shares of Common Stock; (xxiii) ASOF Frontier AIV B1 owns 9,597,579 shares of Common Stock; (continued in next footnote)

F9 · balance_after: (xxiv) ASOF II Frontier Holdings 1 owns 319,862 shares of Common Stock, (xxv) ASOF II Frontier Holdings 2 owns 15,416 shares of Common Stock, (xxvi) ASOF II Frontier Holdings 3 owns 17,170 shares of Common Stock, (xxvii) ASOF II Frontier Holdings 4 owns 16,644 shares of Common Stock, (xxviii) ASOF II Frontier Holdings 5 owns 16,485 shares of Common Stock, (xxix) ASOF II Frontier Holdings 6 owns 17,469 shares of Common Stock, (xxx) ASOF II Frontier Holdings 7 owns 17,513 shares of Common Stock, (xxxi) ASOF II A (DE) Frontier Holdings 1 owns 76,623 shares of Common Stock; (xxxii) ASOF II A (DE) Frontier Holdings 2 owns 2,818 shares of Common Stock; (xxxiii) ASSF IV AIV B Holdings III owns 2,694,243 shares of Common Stock and (xxxiv) ASSF IV AIV B directly or indirectly owns 5,348,289 shares of Common Stock.

F10 · balance_after: Ares Partners is the sole member of each of Ares Voting and Ares Management GP, which are respectively the holders of the Class B and Class C common stock of Ares Management, which common stock allows them, collectively, to generally have the majority of the votes on any matter submitted to the stockholders of Ares Management if certain conditions are met. Ares Management is the sole member of Ares Holdco, which is the general partner of Ares Management Holdings, which is the sole member of Ares Management LLC, which is: (a) the sole member of ACOF Investment Management, which is the manager of the ACOF Funds, (b) the sole member of ASOF Investment Management, which is the manager of the ASOF Funds, and (c) the general partner of ASSF Operating Manager IV, which is the manager of the ASSF Funds.

F11 · balance_after: Ares Partners is managed by a board of managers, which is composed of Michael J Arougheti, Ryan Berry, R. Kipp deVeer, David B. Kaplan, Antony P. Ressler and Bennett Rosenthal (collectively, the "Board Members"). Mr. Ressler generally has veto authority over Board Members' decisions.

F12 · balance_after: Each of the Reporting Persons, and the Board Members, and the other directors, officers, partners, stockholders, members and managers of the Reporting Persons, expressly disclaims beneficial ownership of the Common Stock, except to the extent of any pecuniary interest therein, and this Form 4 shall not be deemed an admission that any such person or entity is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purposes.

F1 · ownership.nature: This statement is being filed by ACOF VI Frontier AIV A1, L.P. ("ACOF VI Frontier AIV A1"), ACOF VI Frontier AIV A2, L.P. ("ACOF VI Frontier AIV A2"), ACOF VI Frontier AIV A3, L.P. ("ACOF VI Frontier AIV A3"), ACOF VI Frontier AIV A4, L.P. ("ACOF VI Frontier AIV A4"), ACOF VI Frontier AIV A5, L.P. ("ACOF VI Frontier AIV A5"), ACOF VI Frontier AIV A6, L.P. ("ACOF VI Frontier AIV A6"), ACOF VI Frontier AIV A7, L.P. ("ACOF VI Frontier AIV A7"), ACOF VI Frontier AIV A8, L.P. ("ACOF VI Frontier AIV A8"), ACOF VI Frontier AIV A9, L.P. ("ACOF VI Frontier AIV A9"), ACOF VI Frontier AIV A10, L.P. ("ACOF VI Frontier AIV A10"), and ACOF VI Frontier AIV B1, L.P. ("ACOF VI Frontier AIV B1", together with the foregoing entities, the "ACOF Funds"), (continued in next footnote)

F2 · ownership.nature: ASOF Frontier AIV A1, L.P. ("ASOF Frontier AIV A1"), ASOF Frontier AIV A2, L.P. ("ASOF Frontier AIV A2"), ASOF Frontier AIV A3, L.P. ("ASOF Frontier AIV A3"), ASOF Frontier AIV A4, L.P. ("ASOF Frontier AIV A4"), ASOF Frontier AIV A5, L.P. ("ASOF Frontier AIV A5"), ASOF Frontier AIV A6, L.P. ("ASOF Frontier AIV A6"), ASOF Frontier AIV A7, L.P. ("ASOF Frontier AIV A7"), ASOF Frontier AIV A8, L.P. ("ASOF Frontier AIV A8"), ASOF Frontier AIV A9, L.P. ("ASOF Frontier AIV A9"), ASOF Frontier AIV A10, L.P. ("ASOF Frontier AIV A10"), ASOF Frontier AIV A11, L.P. ("ASOF Frontier AIV A11"), ASOF Frontier AIV B1, L.P. ("ASOF Frontier AIV B1"), (continued in next footnote)

F3 · ownership.nature: ASOF II Frontier Holdings 1 L.P. ("ASOF II Frontier Holdings 1"), ASOF II Frontier Holdings 2 L.P. ("ASOF II Frontier Holdings 2"), ASOF II Frontier Holdings 3 L.P. ("ASOF II Frontier Holdings 3"), ASOF II Frontier Holdings 4 L.P. ("ASOF II Frontier Holdings 4"), ASOF II Frontier Holdings 5 L.P. ("ASOF II Frontier Holdings 5"), ASOF II Frontier Holdings 6 L.P. ("ASOF II Frontier Holdings 6"), (continued in next footnote)

F4 · ownership.nature: ASOF II Frontier Holdings 7 L.P. ("ASOF II Frontier Holdings 7"), ASOF II A (DE) Frontier Holdings 1 L.P. ("ASOF II A (DE) Frontier Holdings 1") and ASOF II A (DE) Frontier Holdings 2 L.P. ("ASOF II A (DE) Frontier Holdings 2", and together with ASOF Frontier AIV A1, ASOF Frontier AIV A2, ASOF Frontier AIV A3, ASOF Frontier AIV A4, ASOF Frontier AIV A5, ASOF Frontier AIV A6, ASOF Frontier AIV A7, ASOF Frontier AIV A8, ASOF Frontier AIV A9, ASOF Frontier AIV A10, and ASOF Frontier AIV A11, ASOF II Frontier Holdings 1, ASOF II Frontier Holdings 2, ASOF II Frontier Holdings 3, ASOF II Frontier Holdings 4, ASOF II Frontier Holdings 5, ASOF II Frontier Holdings 6, ASOF II Frontier Holdings 7 and ASOF II A (DE) Frontier Holdings 1, the "ASOF Funds"), (continued in next footnote)

F5 · ownership.nature: ASSF IV AIV B Holdings III, L.P. ("ASSF IV AIV B Holdings III"), ASSF IV AIV B, L.P. ("ASSF IV AIV B", and together with ASSF IV AIV B Holdings III, the "ASSF Funds"), ACOF Investment Management LLC ("ACOF Investment Management"), ASOF Investment Management LLC ("ASOF Investment Management"), ASSF Operating Manager IV, L.P. ("ASSF Operating Manager IV"), (continued in next footnote)

F6 · ownership.nature: Ares Management LLC, Ares Management Holdings L.P. ("Ares Management Holdings"), Ares Holdco LLC ("Ares Holdco"), Ares Management Corporation ("Ares Management"), Ares Management GP LLC ("Ares Management GP"), Ares Voting LLC ("Ares Voting") and Ares Partners Holdco LLC ("Ares Partners", and together with the ACOF Funds, the ASOF Funds, the ASSF Funds, ACOF Investment Management, ASOF Investment Management, ASSF Operating Manager IV, Ares Management LLC, Ares Management Holdings, Ares Holdco, Ares Management, Ares Management GP, and Ares Voting, the "Reporting Persons"). Due to the electronic system's limitation of 10 Reporting Persons per joint filing, this statement is being filed in five parts.

F7 · ownership.nature: The Reporting Persons collectively beneficially own, or may be deemed to beneficially own, in the aggregate 35,705,132 shares of Common Stock by reason of the direct or indirect beneficial ownership of such shares as follows: (i) ACOF VI Frontier AIV A1 owns 249,805 shares of Common Stock; (ii) ACOF VI Frontier AIV A2 owns 89,581 shares of Common Stock; (iii) ACOF VI Frontier AIV A3 owns 20,902 shares of Common Stock; (iv) ACOF VI Frontier AIV A4 owns 271,730 shares of Common Stock; (v) ACOF VI Frontier AIV A5 owns 298,604 shares of Common Stock; (vi) ACOF VI Frontier AIV A6 owns 167,219 shares of Common Stock; (vii) ACOF VI Frontier AIV A7 owns 302,616 shares of Common Stock; (viii) ACOF VI Frontier AIV A8 owns shares 303,979 of Common Stock; (ix) ACOF VI Frontier AIV A9 owns 285,466 shares of Common Stock; (x) ACOF VI Frontier AIV A10 owns 90,268 shares of Common Stock; (xi) ACOF VI Frontier AIV B1 owns 15,068,130 shares of Common Stock; (continued in next footnote)

F8 · ownership.nature: (xii) ASOF Frontier AIV A1 owns 105,592 shares of Common Stock; (xiii) ASOF Frontier AIV A2 owns 18,032 shares of Common Stock; (xiv) ASOF Frontier AIV A3 owns 830,837 shares of Common Stock; (xv) ASOF Frontier AIV A4 owns 281,844 shares of Common Stock; (xvi) ASOF Frontier AIV A5 owns 167,160 shares of Common Stock; (xvii) ASOF Frontier AIV A6 owns 292,124 shares of Common Stock; (xviii) ASOF Frontier AIV A7 owns 289,417 shares of Common Stock; (xix) ASOF Frontier AIV A8 owns 238,026 shares of Common Stock; (xx) ASOF Frontier AIV A9 owns 360,644 shares of Common Stock; (xxi) ASOF Frontier AIV A10 owns 259,665 shares of Common Stock; (xxii) ASOF Frontier AIV A11 owns 245,236 shares of Common Stock; (xxiii) ASOF Frontier AIV B1 owns 9,597,579 shares of Common Stock; (continued in next footnote)

F9 · ownership.nature: (xxiv) ASOF II Frontier Holdings 1 owns 319,862 shares of Common Stock, (xxv) ASOF II Frontier Holdings 2 owns 15,416 shares of Common Stock, (xxvi) ASOF II Frontier Holdings 3 owns 17,170 shares of Common Stock, (xxvii) ASOF II Frontier Holdings 4 owns 16,644 shares of Common Stock, (xxviii) ASOF II Frontier Holdings 5 owns 16,485 shares of Common Stock, (xxix) ASOF II Frontier Holdings 6 owns 17,469 shares of Common Stock, (xxx) ASOF II Frontier Holdings 7 owns 17,513 shares of Common Stock, (xxxi) ASOF II A (DE) Frontier Holdings 1 owns 76,623 shares of Common Stock; (xxxii) ASOF II A (DE) Frontier Holdings 2 owns 2,818 shares of Common Stock; (xxxiii) ASSF IV AIV B Holdings III owns 2,694,243 shares of Common Stock and (xxxiv) ASSF IV AIV B directly or indirectly owns 5,348,289 shares of Common Stock.

F10 · ownership.nature: Ares Partners is the sole member of each of Ares Voting and Ares Management GP, which are respectively the holders of the Class B and Class C common stock of Ares Management, which common stock allows them, collectively, to generally have the majority of the votes on any matter submitted to the stockholders of Ares Management if certain conditions are met. Ares Management is the sole member of Ares Holdco, which is the general partner of Ares Management Holdings, which is the sole member of Ares Management LLC, which is: (a) the sole member of ACOF Investment Management, which is the manager of the ACOF Funds, (b) the sole member of ASOF Investment Management, which is the manager of the ASOF Funds, and (c) the general partner of ASSF Operating Manager IV, which is the manager of the ASSF Funds.

F11 · ownership.nature: Ares Partners is managed by a board of managers, which is composed of Michael J Arougheti, Ryan Berry, R. Kipp deVeer, David B. Kaplan, Antony P. Ressler and Bennett Rosenthal (collectively, the "Board Members"). Mr. Ressler generally has veto authority over Board Members' decisions.

F12 · ownership.nature: Each of the Reporting Persons, and the Board Members, and the other directors, officers, partners, stockholders, members and managers of the Reporting Persons, expressly disclaims beneficial ownership of the Common Stock, except to the extent of any pecuniary interest therein, and this Form 4 shall not be deemed an admission that any such person or entity is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purposes.

SEC source: 0001104659-23-032911 · tm239621-6_4seq1.xml · nonDerivative · entry 2

ARES MANAGEMENT LLC · CIK 0001259313 · 10% owner

ACOF VI Frontier AIV A1, L.P. · CIK 0001862494 · 10% owner

ACOF VI Frontier AIV A2, L.P. · CIK 0001862499 · 10% owner

ACOF VI Frontier AIV A3, L.P. · CIK 0001862534 · 10% owner

ACOF VI Frontier AIV A4, L.P. · CIK 0001862529 · 10% owner

ACOF VI Frontier AIV A5, L.P. · CIK 0001862526 · 10% owner

ACOF VI Frontier AIV A6, L.P. · CIK 0001862483 · 10% owner

ACOF VI Frontier AIV A7, L.P. · CIK 0001862482 · 10% owner

ACOF VI Frontier AIV A8, L.P. · CIK 0001862505 · 10% owner

ACOF VI Frontier AIV A9, L.P. · CIK 0001862533 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 35,373,924

F1 · balance_after: This statement is being filed by ACOF VI Frontier AIV A1, L.P. ("ACOF VI Frontier AIV A1"), ACOF VI Frontier AIV A2, L.P. ("ACOF VI Frontier AIV A2"), ACOF VI Frontier AIV A3, L.P. ("ACOF VI Frontier AIV A3"), ACOF VI Frontier AIV A4, L.P. ("ACOF VI Frontier AIV A4"), ACOF VI Frontier AIV A5, L.P. ("ACOF VI Frontier AIV A5"), ACOF VI Frontier AIV A6, L.P. ("ACOF VI Frontier AIV A6"), ACOF VI Frontier AIV A7, L.P. ("ACOF VI Frontier AIV A7"), ACOF VI Frontier AIV A8, L.P. ("ACOF VI Frontier AIV A8"), ACOF VI Frontier AIV A9, L.P. ("ACOF VI Frontier AIV A9"), ACOF VI Frontier AIV A10, L.P. ("ACOF VI Frontier AIV A10"), and ACOF VI Frontier AIV B1, L.P. ("ACOF VI Frontier AIV B1", together with the foregoing entities, the "ACOF Funds"), (continued in next footnote)

F2 · balance_after: ASOF Frontier AIV A1, L.P. ("ASOF Frontier AIV A1"), ASOF Frontier AIV A2, L.P. ("ASOF Frontier AIV A2"), ASOF Frontier AIV A3, L.P. ("ASOF Frontier AIV A3"), ASOF Frontier AIV A4, L.P. ("ASOF Frontier AIV A4"), ASOF Frontier AIV A5, L.P. ("ASOF Frontier AIV A5"), ASOF Frontier AIV A6, L.P. ("ASOF Frontier AIV A6"), ASOF Frontier AIV A7, L.P. ("ASOF Frontier AIV A7"), ASOF Frontier AIV A8, L.P. ("ASOF Frontier AIV A8"), ASOF Frontier AIV A9, L.P. ("ASOF Frontier AIV A9"), ASOF Frontier AIV A10, L.P. ("ASOF Frontier AIV A10"), ASOF Frontier AIV A11, L.P. ("ASOF Frontier AIV A11"), ASOF Frontier AIV B1, L.P. ("ASOF Frontier AIV B1"), (continued in next footnote)

F3 · balance_after: ASOF II Frontier Holdings 1 L.P. ("ASOF II Frontier Holdings 1"), ASOF II Frontier Holdings 2 L.P. ("ASOF II Frontier Holdings 2"), ASOF II Frontier Holdings 3 L.P. ("ASOF II Frontier Holdings 3"), ASOF II Frontier Holdings 4 L.P. ("ASOF II Frontier Holdings 4"), ASOF II Frontier Holdings 5 L.P. ("ASOF II Frontier Holdings 5"), ASOF II Frontier Holdings 6 L.P. ("ASOF II Frontier Holdings 6"), (continued in next footnote)

F4 · balance_after: ASOF II Frontier Holdings 7 L.P. ("ASOF II Frontier Holdings 7"), ASOF II A (DE) Frontier Holdings 1 L.P. ("ASOF II A (DE) Frontier Holdings 1") and ASOF II A (DE) Frontier Holdings 2 L.P. ("ASOF II A (DE) Frontier Holdings 2", and together with ASOF Frontier AIV A1, ASOF Frontier AIV A2, ASOF Frontier AIV A3, ASOF Frontier AIV A4, ASOF Frontier AIV A5, ASOF Frontier AIV A6, ASOF Frontier AIV A7, ASOF Frontier AIV A8, ASOF Frontier AIV A9, ASOF Frontier AIV A10, and ASOF Frontier AIV A11, ASOF II Frontier Holdings 1, ASOF II Frontier Holdings 2, ASOF II Frontier Holdings 3, ASOF II Frontier Holdings 4, ASOF II Frontier Holdings 5, ASOF II Frontier Holdings 6, ASOF II Frontier Holdings 7 and ASOF II A (DE) Frontier Holdings 1, the "ASOF Funds"), (continued in next footnote)

F5 · balance_after: ASSF IV AIV B Holdings III, L.P. ("ASSF IV AIV B Holdings III"), ASSF IV AIV B, L.P. ("ASSF IV AIV B", and together with ASSF IV AIV B Holdings III, the "ASSF Funds"), ACOF Investment Management LLC ("ACOF Investment Management"), ASOF Investment Management LLC ("ASOF Investment Management"), ASSF Operating Manager IV, L.P. ("ASSF Operating Manager IV"), (continued in next footnote)

F6 · balance_after: Ares Management LLC, Ares Management Holdings L.P. ("Ares Management Holdings"), Ares Holdco LLC ("Ares Holdco"), Ares Management Corporation ("Ares Management"), Ares Management GP LLC ("Ares Management GP"), Ares Voting LLC ("Ares Voting") and Ares Partners Holdco LLC ("Ares Partners", and together with the ACOF Funds, the ASOF Funds, the ASSF Funds, ACOF Investment Management, ASOF Investment Management, ASSF Operating Manager IV, Ares Management LLC, Ares Management Holdings, Ares Holdco, Ares Management, Ares Management GP, and Ares Voting, the "Reporting Persons"). Due to the electronic system's limitation of 10 Reporting Persons per joint filing, this statement is being filed in five parts.

F7 · balance_after: The Reporting Persons collectively beneficially own, or may be deemed to beneficially own, in the aggregate 35,373,924 shares of Common Stock by reason of the direct or indirect beneficial ownership of such shares as follows: (i) ACOF VI Frontier AIV A1 owns 249,805 shares of Common Stock; (ii) ACOF VI Frontier AIV A2 owns 89,581 shares of Common Stock; (iii) ACOF VI Frontier AIV A3 owns 20,902 shares of Common Stock; (iv) ACOF VI Frontier AIV A4 owns 271,730 shares of Common Stock; (v) ACOF VI Frontier AIV A5 owns 298,604 shares of Common Stock; (vi) ACOF VI Frontier AIV A6 owns 167,219 shares of Common Stock; (vii) ACOF VI Frontier AIV A7 owns 302,616 shares of Common Stock; (viii) ACOF VI Frontier AIV A8 owns shares 303,979 of Common Stock; (ix) ACOF VI Frontier AIV A9 owns 285,466 shares of Common Stock; (x) ACOF VI Frontier AIV A10 owns 90,268 shares of Common Stock; (xi) ACOF VI Frontier AIV B1 owns 15,068,130 shares of Common Stock; (continued in next footnote)

F8 · balance_after: (xii) ASOF Frontier AIV A1 owns 105,592 shares of Common Stock; (xiii) ASOF Frontier AIV A2 owns 18,032 shares of Common Stock; (xiv) ASOF Frontier AIV A3 owns 830,837 shares of Common Stock; (xv) ASOF Frontier AIV A4 owns 281,844 shares of Common Stock; (xvi) ASOF Frontier AIV A5 owns 167,160 shares of Common Stock; (xvii) ASOF Frontier AIV A6 owns 292,124 shares of Common Stock; (xviii) ASOF Frontier AIV A7 owns 289,417 shares of Common Stock; (xix) ASOF Frontier AIV A8 owns 238,026 shares of Common Stock; (xx) ASOF Frontier AIV A9 owns 360,644 shares of Common Stock; (xxi) ASOF Frontier AIV A10 owns 259,665 shares of Common Stock; (xxii) ASOF Frontier AIV A11 owns 245,236 shares of Common Stock; (xxiii) ASOF Frontier AIV B1 owns 9,597,579 shares of Common Stock; (continued in next footnote)

F9 · balance_after: (xxiv) ASOF II Frontier Holdings 1 owns 107,981 shares of Common Stock, (xxv) ASOF II Frontier Holdings 2 owns 5,204 shares of Common Stock, (xxvi) ASOF II Frontier Holdings 3 owns 5,796 shares of Common Stock, (xxvii) ASOF II Frontier Holdings 4 owns 5,618 shares of Common Stock, (xxviii) ASOF II Frontier Holdings 5 owns 5,565 shares of Common Stock, (xxix) ASOF II Frontier Holdings 6 owns 5,897 shares of Common Stock, (xxx) ASOF II Frontier Holdings 7 owns 5,913 shares of Common Stock, (xxxi) ASOF II A (DE) Frontier Holdings 1 owns 25,866 shares of Common Stock; (xxxii) ASOF II A (DE) Frontier Holdings 2 owns 952 shares of Common Stock; (xxxiii) ASSF IV AIV B Holdings III owns 2,694,243 shares of Common Stock and (xxxiv) ASSF IV AIV B directly or indirectly owns 5,348,289 shares of Common Stock.

F10 · balance_after: Ares Partners is the sole member of each of Ares Voting and Ares Management GP, which are respectively the holders of the Class B and Class C common stock of Ares Management, which common stock allows them, collectively, to generally have the majority of the votes on any matter submitted to the stockholders of Ares Management if certain conditions are met. Ares Management is the sole member of Ares Holdco, which is the general partner of Ares Management Holdings, which is the sole member of Ares Management LLC, which is: (a) the sole member of ACOF Investment Management, which is the manager of the ACOF Funds, (b) the sole member of ASOF Investment Management, which is the manager of the ASOF Funds, and (c) the general partner of ASSF Operating Manager IV, which is the manager of the ASSF Funds.

F11 · balance_after: Ares Partners is managed by a board of managers, which is composed of Michael J Arougheti, Ryan Berry, R. Kipp deVeer, David B. Kaplan, Antony P. Ressler and Bennett Rosenthal (collectively, the "Board Members"). Mr. Ressler generally has veto authority over Board Members' decisions.

F12 · balance_after: Each of the Reporting Persons, and the Board Members, and the other directors, officers, partners, stockholders, members and managers of the Reporting Persons, expressly disclaims beneficial ownership of the Common Stock, except to the extent of any pecuniary interest therein, and this Form 4 shall not be deemed an admission that any such person or entity is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purposes.

F1 · ownership.nature: This statement is being filed by ACOF VI Frontier AIV A1, L.P. ("ACOF VI Frontier AIV A1"), ACOF VI Frontier AIV A2, L.P. ("ACOF VI Frontier AIV A2"), ACOF VI Frontier AIV A3, L.P. ("ACOF VI Frontier AIV A3"), ACOF VI Frontier AIV A4, L.P. ("ACOF VI Frontier AIV A4"), ACOF VI Frontier AIV A5, L.P. ("ACOF VI Frontier AIV A5"), ACOF VI Frontier AIV A6, L.P. ("ACOF VI Frontier AIV A6"), ACOF VI Frontier AIV A7, L.P. ("ACOF VI Frontier AIV A7"), ACOF VI Frontier AIV A8, L.P. ("ACOF VI Frontier AIV A8"), ACOF VI Frontier AIV A9, L.P. ("ACOF VI Frontier AIV A9"), ACOF VI Frontier AIV A10, L.P. ("ACOF VI Frontier AIV A10"), and ACOF VI Frontier AIV B1, L.P. ("ACOF VI Frontier AIV B1", together with the foregoing entities, the "ACOF Funds"), (continued in next footnote)

F2 · ownership.nature: ASOF Frontier AIV A1, L.P. ("ASOF Frontier AIV A1"), ASOF Frontier AIV A2, L.P. ("ASOF Frontier AIV A2"), ASOF Frontier AIV A3, L.P. ("ASOF Frontier AIV A3"), ASOF Frontier AIV A4, L.P. ("ASOF Frontier AIV A4"), ASOF Frontier AIV A5, L.P. ("ASOF Frontier AIV A5"), ASOF Frontier AIV A6, L.P. ("ASOF Frontier AIV A6"), ASOF Frontier AIV A7, L.P. ("ASOF Frontier AIV A7"), ASOF Frontier AIV A8, L.P. ("ASOF Frontier AIV A8"), ASOF Frontier AIV A9, L.P. ("ASOF Frontier AIV A9"), ASOF Frontier AIV A10, L.P. ("ASOF Frontier AIV A10"), ASOF Frontier AIV A11, L.P. ("ASOF Frontier AIV A11"), ASOF Frontier AIV B1, L.P. ("ASOF Frontier AIV B1"), (continued in next footnote)

F3 · ownership.nature: ASOF II Frontier Holdings 1 L.P. ("ASOF II Frontier Holdings 1"), ASOF II Frontier Holdings 2 L.P. ("ASOF II Frontier Holdings 2"), ASOF II Frontier Holdings 3 L.P. ("ASOF II Frontier Holdings 3"), ASOF II Frontier Holdings 4 L.P. ("ASOF II Frontier Holdings 4"), ASOF II Frontier Holdings 5 L.P. ("ASOF II Frontier Holdings 5"), ASOF II Frontier Holdings 6 L.P. ("ASOF II Frontier Holdings 6"), (continued in next footnote)

F4 · ownership.nature: ASOF II Frontier Holdings 7 L.P. ("ASOF II Frontier Holdings 7"), ASOF II A (DE) Frontier Holdings 1 L.P. ("ASOF II A (DE) Frontier Holdings 1") and ASOF II A (DE) Frontier Holdings 2 L.P. ("ASOF II A (DE) Frontier Holdings 2", and together with ASOF Frontier AIV A1, ASOF Frontier AIV A2, ASOF Frontier AIV A3, ASOF Frontier AIV A4, ASOF Frontier AIV A5, ASOF Frontier AIV A6, ASOF Frontier AIV A7, ASOF Frontier AIV A8, ASOF Frontier AIV A9, ASOF Frontier AIV A10, and ASOF Frontier AIV A11, ASOF II Frontier Holdings 1, ASOF II Frontier Holdings 2, ASOF II Frontier Holdings 3, ASOF II Frontier Holdings 4, ASOF II Frontier Holdings 5, ASOF II Frontier Holdings 6, ASOF II Frontier Holdings 7 and ASOF II A (DE) Frontier Holdings 1, the "ASOF Funds"), (continued in next footnote)

F5 · ownership.nature: ASSF IV AIV B Holdings III, L.P. ("ASSF IV AIV B Holdings III"), ASSF IV AIV B, L.P. ("ASSF IV AIV B", and together with ASSF IV AIV B Holdings III, the "ASSF Funds"), ACOF Investment Management LLC ("ACOF Investment Management"), ASOF Investment Management LLC ("ASOF Investment Management"), ASSF Operating Manager IV, L.P. ("ASSF Operating Manager IV"), (continued in next footnote)

F6 · ownership.nature: Ares Management LLC, Ares Management Holdings L.P. ("Ares Management Holdings"), Ares Holdco LLC ("Ares Holdco"), Ares Management Corporation ("Ares Management"), Ares Management GP LLC ("Ares Management GP"), Ares Voting LLC ("Ares Voting") and Ares Partners Holdco LLC ("Ares Partners", and together with the ACOF Funds, the ASOF Funds, the ASSF Funds, ACOF Investment Management, ASOF Investment Management, ASSF Operating Manager IV, Ares Management LLC, Ares Management Holdings, Ares Holdco, Ares Management, Ares Management GP, and Ares Voting, the "Reporting Persons"). Due to the electronic system's limitation of 10 Reporting Persons per joint filing, this statement is being filed in five parts.

F7 · ownership.nature: The Reporting Persons collectively beneficially own, or may be deemed to beneficially own, in the aggregate 35,373,924 shares of Common Stock by reason of the direct or indirect beneficial ownership of such shares as follows: (i) ACOF VI Frontier AIV A1 owns 249,805 shares of Common Stock; (ii) ACOF VI Frontier AIV A2 owns 89,581 shares of Common Stock; (iii) ACOF VI Frontier AIV A3 owns 20,902 shares of Common Stock; (iv) ACOF VI Frontier AIV A4 owns 271,730 shares of Common Stock; (v) ACOF VI Frontier AIV A5 owns 298,604 shares of Common Stock; (vi) ACOF VI Frontier AIV A6 owns 167,219 shares of Common Stock; (vii) ACOF VI Frontier AIV A7 owns 302,616 shares of Common Stock; (viii) ACOF VI Frontier AIV A8 owns shares 303,979 of Common Stock; (ix) ACOF VI Frontier AIV A9 owns 285,466 shares of Common Stock; (x) ACOF VI Frontier AIV A10 owns 90,268 shares of Common Stock; (xi) ACOF VI Frontier AIV B1 owns 15,068,130 shares of Common Stock; (continued in next footnote)

F8 · ownership.nature: (xii) ASOF Frontier AIV A1 owns 105,592 shares of Common Stock; (xiii) ASOF Frontier AIV A2 owns 18,032 shares of Common Stock; (xiv) ASOF Frontier AIV A3 owns 830,837 shares of Common Stock; (xv) ASOF Frontier AIV A4 owns 281,844 shares of Common Stock; (xvi) ASOF Frontier AIV A5 owns 167,160 shares of Common Stock; (xvii) ASOF Frontier AIV A6 owns 292,124 shares of Common Stock; (xviii) ASOF Frontier AIV A7 owns 289,417 shares of Common Stock; (xix) ASOF Frontier AIV A8 owns 238,026 shares of Common Stock; (xx) ASOF Frontier AIV A9 owns 360,644 shares of Common Stock; (xxi) ASOF Frontier AIV A10 owns 259,665 shares of Common Stock; (xxii) ASOF Frontier AIV A11 owns 245,236 shares of Common Stock; (xxiii) ASOF Frontier AIV B1 owns 9,597,579 shares of Common Stock; (continued in next footnote)

F9 · ownership.nature: (xxiv) ASOF II Frontier Holdings 1 owns 107,981 shares of Common Stock, (xxv) ASOF II Frontier Holdings 2 owns 5,204 shares of Common Stock, (xxvi) ASOF II Frontier Holdings 3 owns 5,796 shares of Common Stock, (xxvii) ASOF II Frontier Holdings 4 owns 5,618 shares of Common Stock, (xxviii) ASOF II Frontier Holdings 5 owns 5,565 shares of Common Stock, (xxix) ASOF II Frontier Holdings 6 owns 5,897 shares of Common Stock, (xxx) ASOF II Frontier Holdings 7 owns 5,913 shares of Common Stock, (xxxi) ASOF II A (DE) Frontier Holdings 1 owns 25,866 shares of Common Stock; (xxxii) ASOF II A (DE) Frontier Holdings 2 owns 952 shares of Common Stock; (xxxiii) ASSF IV AIV B Holdings III owns 2,694,243 shares of Common Stock and (xxxiv) ASSF IV AIV B directly or indirectly owns 5,348,289 shares of Common Stock.

F10 · ownership.nature: Ares Partners is the sole member of each of Ares Voting and Ares Management GP, which are respectively the holders of the Class B and Class C common stock of Ares Management, which common stock allows them, collectively, to generally have the majority of the votes on any matter submitted to the stockholders of Ares Management if certain conditions are met. Ares Management is the sole member of Ares Holdco, which is the general partner of Ares Management Holdings, which is the sole member of Ares Management LLC, which is: (a) the sole member of ACOF Investment Management, which is the manager of the ACOF Funds, (b) the sole member of ASOF Investment Management, which is the manager of the ASOF Funds, and (c) the general partner of ASSF Operating Manager IV, which is the manager of the ASSF Funds.

F11 · ownership.nature: Ares Partners is managed by a board of managers, which is composed of Michael J Arougheti, Ryan Berry, R. Kipp deVeer, David B. Kaplan, Antony P. Ressler and Bennett Rosenthal (collectively, the "Board Members"). Mr. Ressler generally has veto authority over Board Members' decisions.

F12 · ownership.nature: Each of the Reporting Persons, and the Board Members, and the other directors, officers, partners, stockholders, members and managers of the Reporting Persons, expressly disclaims beneficial ownership of the Common Stock, except to the extent of any pecuniary interest therein, and this Form 4 shall not be deemed an admission that any such person or entity is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purposes.

SEC source: 0001104659-23-032911 · tm239621-6_4seq1.xml · nonDerivative · entry 1

ARES MANAGEMENT LLC · CIK 0001259313 · 10% owner

ACOF VI Frontier AIV A1, L.P. · CIK 0001862494 · 10% owner

ACOF VI Frontier AIV A2, L.P. · CIK 0001862499 · 10% owner

ACOF VI Frontier AIV A3, L.P. · CIK 0001862534 · 10% owner

ACOF VI Frontier AIV A4, L.P. · CIK 0001862529 · 10% owner

ACOF VI Frontier AIV A5, L.P. · CIK 0001862526 · 10% owner

ACOF VI Frontier AIV A6, L.P. · CIK 0001862483 · 10% owner

ACOF VI Frontier AIV A7, L.P. · CIK 0001862482 · 10% owner

ACOF VI Frontier AIV A8, L.P. · CIK 0001862505 · 10% owner

ACOF VI Frontier AIV A9, L.P. · CIK 0001862533 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 35,373,824

F1 · balance_after: This statement is being filed by ACOF VI Frontier AIV A1, L.P. ("ACOF VI Frontier AIV A1"), ACOF VI Frontier AIV A2, L.P. ("ACOF VI Frontier AIV A2"), ACOF VI Frontier AIV A3, L.P. ("ACOF VI Frontier AIV A3"), ACOF VI Frontier AIV A4, L.P. ("ACOF VI Frontier AIV A4"), ACOF VI Frontier AIV A5, L.P. ("ACOF VI Frontier AIV A5"), ACOF VI Frontier AIV A6, L.P. ("ACOF VI Frontier AIV A6"), ACOF VI Frontier AIV A7, L.P. ("ACOF VI Frontier AIV A7"), ACOF VI Frontier AIV A8, L.P. ("ACOF VI Frontier AIV A8"), ACOF VI Frontier AIV A9, L.P. ("ACOF VI Frontier AIV A9"), ACOF VI Frontier AIV A10, L.P. ("ACOF VI Frontier AIV A10"), and ACOF VI Frontier AIV B1, L.P. ("ACOF VI Frontier AIV B1", together with the foregoing entities, the "ACOF Funds"), (continued in next footnote)

F2 · balance_after: ASOF Frontier AIV A1, L.P. ("ASOF Frontier AIV A1"), ASOF Frontier AIV A2, L.P. ("ASOF Frontier AIV A2"), ASOF Frontier AIV A3, L.P. ("ASOF Frontier AIV A3"), ASOF Frontier AIV A4, L.P. ("ASOF Frontier AIV A4"), ASOF Frontier AIV A5, L.P. ("ASOF Frontier AIV A5"), ASOF Frontier AIV A6, L.P. ("ASOF Frontier AIV A6"), ASOF Frontier AIV A7, L.P. ("ASOF Frontier AIV A7"), ASOF Frontier AIV A8, L.P. ("ASOF Frontier AIV A8"), ASOF Frontier AIV A9, L.P. ("ASOF Frontier AIV A9"), ASOF Frontier AIV A10, L.P. ("ASOF Frontier AIV A10"), ASOF Frontier AIV A11, L.P. ("ASOF Frontier AIV A11"), ASOF Frontier AIV B1, L.P. ("ASOF Frontier AIV B1"), (continued in next footnote)

F3 · balance_after: ASOF II Frontier Holdings 1 L.P. ("ASOF II Frontier Holdings 1"), ASOF II Frontier Holdings 2 L.P. ("ASOF II Frontier Holdings 2"), ASOF II Frontier Holdings 3 L.P. ("ASOF II Frontier Holdings 3"), ASOF II Frontier Holdings 4 L.P. ("ASOF II Frontier Holdings 4"), ASOF II Frontier Holdings 5 L.P. ("ASOF II Frontier Holdings 5"), ASOF II Frontier Holdings 6 L.P. ("ASOF II Frontier Holdings 6"), (continued in next footnote)

F4 · balance_after: ASOF II Frontier Holdings 7 L.P. ("ASOF II Frontier Holdings 7"), ASOF II A (DE) Frontier Holdings 1 L.P. ("ASOF II A (DE) Frontier Holdings 1") and ASOF II A (DE) Frontier Holdings 2 L.P. ("ASOF II A (DE) Frontier Holdings 2", and together with ASOF Frontier AIV A1, ASOF Frontier AIV A2, ASOF Frontier AIV A3, ASOF Frontier AIV A4, ASOF Frontier AIV A5, ASOF Frontier AIV A6, ASOF Frontier AIV A7, ASOF Frontier AIV A8, ASOF Frontier AIV A9, ASOF Frontier AIV A10, and ASOF Frontier AIV A11, ASOF II Frontier Holdings 1, ASOF II Frontier Holdings 2, ASOF II Frontier Holdings 3, ASOF II Frontier Holdings 4, ASOF II Frontier Holdings 5, ASOF II Frontier Holdings 6, ASOF II Frontier Holdings 7 and ASOF II A (DE) Frontier Holdings 1, the "ASOF Funds"), (continued in next footnote)

F5 · balance_after: ASSF IV AIV B Holdings III, L.P. ("ASSF IV AIV B Holdings III"), ASSF IV AIV B, L.P. ("ASSF IV AIV B", and together with ASSF IV AIV B Holdings III, the "ASSF Funds"), ACOF Investment Management LLC ("ACOF Investment Management"), ASOF Investment Management LLC ("ASOF Investment Management"), ASSF Operating Manager IV, L.P. ("ASSF Operating Manager IV"), (continued in next footnote)

F6 · balance_after: Ares Management LLC, Ares Management Holdings L.P. ("Ares Management Holdings"), Ares Holdco LLC ("Ares Holdco"), Ares Management Corporation ("Ares Management"), Ares Management GP LLC ("Ares Management GP"), Ares Voting LLC ("Ares Voting") and Ares Partners Holdco LLC ("Ares Partners", and together with the ACOF Funds, the ASOF Funds, the ASSF Funds, ACOF Investment Management, ASOF Investment Management, ASSF Operating Manager IV, Ares Management LLC, Ares Management Holdings, Ares Holdco, Ares Management, Ares Management GP, and Ares Voting, the "Reporting Persons"). Due to the electronic system's limitation of 10 Reporting Persons per joint filing, this statement is being filed in five parts.

F7 · balance_after: The Reporting Persons collectively beneficially own, or may be deemed to beneficially own, in the aggregate 35,373,924 shares of Common Stock by reason of the direct or indirect beneficial ownership of such shares as follows: (i) ACOF VI Frontier AIV A1 owns 249,805 shares of Common Stock; (ii) ACOF VI Frontier AIV A2 owns 89,581 shares of Common Stock; (iii) ACOF VI Frontier AIV A3 owns 20,902 shares of Common Stock; (iv) ACOF VI Frontier AIV A4 owns 271,730 shares of Common Stock; (v) ACOF VI Frontier AIV A5 owns 298,604 shares of Common Stock; (vi) ACOF VI Frontier AIV A6 owns 167,219 shares of Common Stock; (vii) ACOF VI Frontier AIV A7 owns 302,616 shares of Common Stock; (viii) ACOF VI Frontier AIV A8 owns shares 303,979 of Common Stock; (ix) ACOF VI Frontier AIV A9 owns 285,466 shares of Common Stock; (x) ACOF VI Frontier AIV A10 owns 90,268 shares of Common Stock; (xi) ACOF VI Frontier AIV B1 owns 15,068,130 shares of Common Stock; (continued in next footnote)

F8 · balance_after: (xii) ASOF Frontier AIV A1 owns 105,592 shares of Common Stock; (xiii) ASOF Frontier AIV A2 owns 18,032 shares of Common Stock; (xiv) ASOF Frontier AIV A3 owns 830,837 shares of Common Stock; (xv) ASOF Frontier AIV A4 owns 281,844 shares of Common Stock; (xvi) ASOF Frontier AIV A5 owns 167,160 shares of Common Stock; (xvii) ASOF Frontier AIV A6 owns 292,124 shares of Common Stock; (xviii) ASOF Frontier AIV A7 owns 289,417 shares of Common Stock; (xix) ASOF Frontier AIV A8 owns 238,026 shares of Common Stock; (xx) ASOF Frontier AIV A9 owns 360,644 shares of Common Stock; (xxi) ASOF Frontier AIV A10 owns 259,665 shares of Common Stock; (xxii) ASOF Frontier AIV A11 owns 245,236 shares of Common Stock; (xxiii) ASOF Frontier AIV B1 owns 9,597,579 shares of Common Stock; (continued in next footnote)

F9 · balance_after: (xxiv) ASOF II Frontier Holdings 1 owns 107,981 shares of Common Stock, (xxv) ASOF II Frontier Holdings 2 owns 5,204 shares of Common Stock, (xxvi) ASOF II Frontier Holdings 3 owns 5,796 shares of Common Stock, (xxvii) ASOF II Frontier Holdings 4 owns 5,618 shares of Common Stock, (xxviii) ASOF II Frontier Holdings 5 owns 5,565 shares of Common Stock, (xxix) ASOF II Frontier Holdings 6 owns 5,897 shares of Common Stock, (xxx) ASOF II Frontier Holdings 7 owns 5,913 shares of Common Stock, (xxxi) ASOF II A (DE) Frontier Holdings 1 owns 25,866 shares of Common Stock; (xxxii) ASOF II A (DE) Frontier Holdings 2 owns 952 shares of Common Stock; (xxxiii) ASSF IV AIV B Holdings III owns 2,694,243 shares of Common Stock and (xxxiv) ASSF IV AIV B directly or indirectly owns 5,348,289 shares of Common Stock.

F10 · balance_after: Ares Partners is the sole member of each of Ares Voting and Ares Management GP, which are respectively the holders of the Class B and Class C common stock of Ares Management, which common stock allows them, collectively, to generally have the majority of the votes on any matter submitted to the stockholders of Ares Management if certain conditions are met. Ares Management is the sole member of Ares Holdco, which is the general partner of Ares Management Holdings, which is the sole member of Ares Management LLC, which is: (a) the sole member of ACOF Investment Management, which is the manager of the ACOF Funds, (b) the sole member of ASOF Investment Management, which is the manager of the ASOF Funds, and (c) the general partner of ASSF Operating Manager IV, which is the manager of the ASSF Funds.

F11 · balance_after: Ares Partners is managed by a board of managers, which is composed of Michael J Arougheti, Ryan Berry, R. Kipp deVeer, David B. Kaplan, Antony P. Ressler and Bennett Rosenthal (collectively, the "Board Members"). Mr. Ressler generally has veto authority over Board Members' decisions.

F12 · balance_after: Each of the Reporting Persons, and the Board Members, and the other directors, officers, partners, stockholders, members and managers of the Reporting Persons, expressly disclaims beneficial ownership of the Common Stock, except to the extent of any pecuniary interest therein, and this Form 4 shall not be deemed an admission that any such person or entity is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purposes.

F1 · ownership.nature: This statement is being filed by ACOF VI Frontier AIV A1, L.P. ("ACOF VI Frontier AIV A1"), ACOF VI Frontier AIV A2, L.P. ("ACOF VI Frontier AIV A2"), ACOF VI Frontier AIV A3, L.P. ("ACOF VI Frontier AIV A3"), ACOF VI Frontier AIV A4, L.P. ("ACOF VI Frontier AIV A4"), ACOF VI Frontier AIV A5, L.P. ("ACOF VI Frontier AIV A5"), ACOF VI Frontier AIV A6, L.P. ("ACOF VI Frontier AIV A6"), ACOF VI Frontier AIV A7, L.P. ("ACOF VI Frontier AIV A7"), ACOF VI Frontier AIV A8, L.P. ("ACOF VI Frontier AIV A8"), ACOF VI Frontier AIV A9, L.P. ("ACOF VI Frontier AIV A9"), ACOF VI Frontier AIV A10, L.P. ("ACOF VI Frontier AIV A10"), and ACOF VI Frontier AIV B1, L.P. ("ACOF VI Frontier AIV B1", together with the foregoing entities, the "ACOF Funds"), (continued in next footnote)

F2 · ownership.nature: ASOF Frontier AIV A1, L.P. ("ASOF Frontier AIV A1"), ASOF Frontier AIV A2, L.P. ("ASOF Frontier AIV A2"), ASOF Frontier AIV A3, L.P. ("ASOF Frontier AIV A3"), ASOF Frontier AIV A4, L.P. ("ASOF Frontier AIV A4"), ASOF Frontier AIV A5, L.P. ("ASOF Frontier AIV A5"), ASOF Frontier AIV A6, L.P. ("ASOF Frontier AIV A6"), ASOF Frontier AIV A7, L.P. ("ASOF Frontier AIV A7"), ASOF Frontier AIV A8, L.P. ("ASOF Frontier AIV A8"), ASOF Frontier AIV A9, L.P. ("ASOF Frontier AIV A9"), ASOF Frontier AIV A10, L.P. ("ASOF Frontier AIV A10"), ASOF Frontier AIV A11, L.P. ("ASOF Frontier AIV A11"), ASOF Frontier AIV B1, L.P. ("ASOF Frontier AIV B1"), (continued in next footnote)

F3 · ownership.nature: ASOF II Frontier Holdings 1 L.P. ("ASOF II Frontier Holdings 1"), ASOF II Frontier Holdings 2 L.P. ("ASOF II Frontier Holdings 2"), ASOF II Frontier Holdings 3 L.P. ("ASOF II Frontier Holdings 3"), ASOF II Frontier Holdings 4 L.P. ("ASOF II Frontier Holdings 4"), ASOF II Frontier Holdings 5 L.P. ("ASOF II Frontier Holdings 5"), ASOF II Frontier Holdings 6 L.P. ("ASOF II Frontier Holdings 6"), (continued in next footnote)

F4 · ownership.nature: ASOF II Frontier Holdings 7 L.P. ("ASOF II Frontier Holdings 7"), ASOF II A (DE) Frontier Holdings 1 L.P. ("ASOF II A (DE) Frontier Holdings 1") and ASOF II A (DE) Frontier Holdings 2 L.P. ("ASOF II A (DE) Frontier Holdings 2", and together with ASOF Frontier AIV A1, ASOF Frontier AIV A2, ASOF Frontier AIV A3, ASOF Frontier AIV A4, ASOF Frontier AIV A5, ASOF Frontier AIV A6, ASOF Frontier AIV A7, ASOF Frontier AIV A8, ASOF Frontier AIV A9, ASOF Frontier AIV A10, and ASOF Frontier AIV A11, ASOF II Frontier Holdings 1, ASOF II Frontier Holdings 2, ASOF II Frontier Holdings 3, ASOF II Frontier Holdings 4, ASOF II Frontier Holdings 5, ASOF II Frontier Holdings 6, ASOF II Frontier Holdings 7 and ASOF II A (DE) Frontier Holdings 1, the "ASOF Funds"), (continued in next footnote)

F5 · ownership.nature: ASSF IV AIV B Holdings III, L.P. ("ASSF IV AIV B Holdings III"), ASSF IV AIV B, L.P. ("ASSF IV AIV B", and together with ASSF IV AIV B Holdings III, the "ASSF Funds"), ACOF Investment Management LLC ("ACOF Investment Management"), ASOF Investment Management LLC ("ASOF Investment Management"), ASSF Operating Manager IV, L.P. ("ASSF Operating Manager IV"), (continued in next footnote)

F6 · ownership.nature: Ares Management LLC, Ares Management Holdings L.P. ("Ares Management Holdings"), Ares Holdco LLC ("Ares Holdco"), Ares Management Corporation ("Ares Management"), Ares Management GP LLC ("Ares Management GP"), Ares Voting LLC ("Ares Voting") and Ares Partners Holdco LLC ("Ares Partners", and together with the ACOF Funds, the ASOF Funds, the ASSF Funds, ACOF Investment Management, ASOF Investment Management, ASSF Operating Manager IV, Ares Management LLC, Ares Management Holdings, Ares Holdco, Ares Management, Ares Management GP, and Ares Voting, the "Reporting Persons"). Due to the electronic system's limitation of 10 Reporting Persons per joint filing, this statement is being filed in five parts.

F7 · ownership.nature: The Reporting Persons collectively beneficially own, or may be deemed to beneficially own, in the aggregate 35,373,924 shares of Common Stock by reason of the direct or indirect beneficial ownership of such shares as follows: (i) ACOF VI Frontier AIV A1 owns 249,805 shares of Common Stock; (ii) ACOF VI Frontier AIV A2 owns 89,581 shares of Common Stock; (iii) ACOF VI Frontier AIV A3 owns 20,902 shares of Common Stock; (iv) ACOF VI Frontier AIV A4 owns 271,730 shares of Common Stock; (v) ACOF VI Frontier AIV A5 owns 298,604 shares of Common Stock; (vi) ACOF VI Frontier AIV A6 owns 167,219 shares of Common Stock; (vii) ACOF VI Frontier AIV A7 owns 302,616 shares of Common Stock; (viii) ACOF VI Frontier AIV A8 owns shares 303,979 of Common Stock; (ix) ACOF VI Frontier AIV A9 owns 285,466 shares of Common Stock; (x) ACOF VI Frontier AIV A10 owns 90,268 shares of Common Stock; (xi) ACOF VI Frontier AIV B1 owns 15,068,130 shares of Common Stock; (continued in next footnote)

F8 · ownership.nature: (xii) ASOF Frontier AIV A1 owns 105,592 shares of Common Stock; (xiii) ASOF Frontier AIV A2 owns 18,032 shares of Common Stock; (xiv) ASOF Frontier AIV A3 owns 830,837 shares of Common Stock; (xv) ASOF Frontier AIV A4 owns 281,844 shares of Common Stock; (xvi) ASOF Frontier AIV A5 owns 167,160 shares of Common Stock; (xvii) ASOF Frontier AIV A6 owns 292,124 shares of Common Stock; (xviii) ASOF Frontier AIV A7 owns 289,417 shares of Common Stock; (xix) ASOF Frontier AIV A8 owns 238,026 shares of Common Stock; (xx) ASOF Frontier AIV A9 owns 360,644 shares of Common Stock; (xxi) ASOF Frontier AIV A10 owns 259,665 shares of Common Stock; (xxii) ASOF Frontier AIV A11 owns 245,236 shares of Common Stock; (xxiii) ASOF Frontier AIV B1 owns 9,597,579 shares of Common Stock; (continued in next footnote)

F9 · ownership.nature: (xxiv) ASOF II Frontier Holdings 1 owns 107,981 shares of Common Stock, (xxv) ASOF II Frontier Holdings 2 owns 5,204 shares of Common Stock, (xxvi) ASOF II Frontier Holdings 3 owns 5,796 shares of Common Stock, (xxvii) ASOF II Frontier Holdings 4 owns 5,618 shares of Common Stock, (xxviii) ASOF II Frontier Holdings 5 owns 5,565 shares of Common Stock, (xxix) ASOF II Frontier Holdings 6 owns 5,897 shares of Common Stock, (xxx) ASOF II Frontier Holdings 7 owns 5,913 shares of Common Stock, (xxxi) ASOF II A (DE) Frontier Holdings 1 owns 25,866 shares of Common Stock; (xxxii) ASOF II A (DE) Frontier Holdings 2 owns 952 shares of Common Stock; (xxxiii) ASSF IV AIV B Holdings III owns 2,694,243 shares of Common Stock and (xxxiv) ASSF IV AIV B directly or indirectly owns 5,348,289 shares of Common Stock.

F10 · ownership.nature: Ares Partners is the sole member of each of Ares Voting and Ares Management GP, which are respectively the holders of the Class B and Class C common stock of Ares Management, which common stock allows them, collectively, to generally have the majority of the votes on any matter submitted to the stockholders of Ares Management if certain conditions are met. Ares Management is the sole member of Ares Holdco, which is the general partner of Ares Management Holdings, which is the sole member of Ares Management LLC, which is: (a) the sole member of ACOF Investment Management, which is the manager of the ACOF Funds, (b) the sole member of ASOF Investment Management, which is the manager of the ASOF Funds, and (c) the general partner of ASSF Operating Manager IV, which is the manager of the ASSF Funds.

F11 · ownership.nature: Ares Partners is managed by a board of managers, which is composed of Michael J Arougheti, Ryan Berry, R. Kipp deVeer, David B. Kaplan, Antony P. Ressler and Bennett Rosenthal (collectively, the "Board Members"). Mr. Ressler generally has veto authority over Board Members' decisions.

F12 · ownership.nature: Each of the Reporting Persons, and the Board Members, and the other directors, officers, partners, stockholders, members and managers of the Reporting Persons, expressly disclaims beneficial ownership of the Common Stock, except to the extent of any pecuniary interest therein, and this Form 4 shall not be deemed an admission that any such person or entity is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purposes.

SEC source: 0001104659-21-120390 · tm2128492-1_4seq1.xml · nonDerivative · entry 23

ARES MANAGEMENT LLC · CIK 0001259313 · 10% owner

ACOF VI Frontier AIV A1, L.P. · CIK 0001862494 · 10% owner

ACOF VI Frontier AIV A2, L.P. · CIK 0001862499 · 10% owner

ACOF VI Frontier AIV A3, L.P. · CIK 0001862534 · 10% owner

ACOF VI Frontier AIV A4, L.P. · CIK 0001862529 · 10% owner

ACOF VI Frontier AIV A5, L.P. · CIK 0001862526 · 10% owner

ACOF VI Frontier AIV A6, L.P. · CIK 0001862483 · 10% owner

ACOF VI Frontier AIV A7, L.P. · CIK 0001862482 · 10% owner

ACOF VI Frontier AIV A8, L.P. · CIK 0001862505 · 10% owner

ACOF VI Frontier AIV A9, L.P. · CIK 0001862533 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · By ACOF VI Frontier AIV B1, L.P.

Disclosed balance after: 15,068,130

F1 · kind: These transactions reflect inter-fund transfers (the "Transfers") of shares of the Issuer's Common Stock from one Ares Direct Holder (as defined below) to another Ares Direct Holder in connection with an internal rebalancing of such Ares Direct Holders' holdings of Common Stock. Each Transfer occurred at the same time and at the same price.

F2 · balance_after: This statement is being filed by ACOF VI Frontier AIV A1, L.P. ("ACOF VI Frontier AIV A1"), ACOF VI Frontier AIV A2, L.P. ("ACOF VI Frontier AIV A2"), ACOF VI Frontier AIV A3, L.P. ("ACOF VI Frontier AIV A3"), ACOF VI Frontier AIV A4, L.P. ("ACOF VI Frontier AIV A4"), ACOF VI Frontier AIV A5, L.P. ("ACOF VI Frontier AIV A5"), ACOF VI Frontier AIV A6, L.P. ("ACOF VI Frontier AIV A6"), ACOF VI Frontier AIV A7, L.P. ("ACOF VI Frontier AIV A7"), ACOF VI Frontier AIV A8, L.P. ("ACOF VI Frontier AIV A8"), ACOF VI Frontier AIV A9, L.P. ("ACOF VI Frontier AIV A9"), ACOF VI Frontier AIV A10, L.P. ("ACOF VI Frontier AIV A10"), and ACOF VI Frontier AIV B1, L.P. ("ACOF VI Frontier AIV B1", together with the foregoing entities, the "ACOF Funds"), (continued in next footnote)

F3 · balance_after: ASOF Frontier AIV A1, L.P. ("ASOF Frontier AIV A1"), ASOF Frontier AIV A2, L.P. ("ASOF Frontier AIV A2"), ASOF Frontier AIV A3, L.P. ("ASOF Frontier AIV A3"), ASOF Frontier AIV A4, L.P. ("ASOF Frontier AIV A4"), ASOF Frontier AIV A5, L.P. ("ASOF Frontier AIV A5"), ASOF Frontier AIV A6, L.P. ("ASOF Frontier AIV A6"), ASOF Frontier AIV A7, L.P. ("ASOF Frontier AIV A7"), ASOF Frontier AIV A8, L.P. ("ASOF Frontier AIV A8"), ASOF Frontier AIV A9, L.P. ("ASOF Frontier AIV A9"), ASOF Frontier AIV A10, L.P. ("ASOF Frontier AIV A10"), ASOF Frontier AIV A11, L.P. ("ASOF Frontier AIV A11"), (continued in next footnote)

F4 · balance_after: and ASOF Frontier AIV B1, L.P. ("ASOF Frontier AIV B1", together with ASOF Frontier AIV A1, ASOF Frontier AIV A2, ASOF Frontier AIV A3, ASOF Frontier AIV A4, ASOF Frontier AIV A5, ASOF Frontier AIV A6, ASOF Frontier AIV A7, ASOF Frontier AIV A8, ASOF Frontier AIV A9, ASOF Frontier AIV A10, and ASOF Frontier AIV A11, the "ASOF Funds"), ASSF IV AIV B Holdings III, L.P. ("ASSF IV AIV B Holdings III"), ASSF IV AIV B, L.P. ("ASSF IV AIV B", and together with ASSF IV AIV B Holdings III, the "ASSF Funds", and together with the ACOF Funds, and the ASOF Funds, the "Ares Direct Holders"), (continued in next footnote)

F5 · balance_after: ACOF Investment Management LLC ("ACOF Investment Management"), ASOF Investment Management LLC ("ASOF Investment Management"), ASSF Operating Manager IV, L.P. ("ASSF Operating Manager"), Ares Management LLC, Ares Management Holdings L.P. ("Ares Management Holdings"), Ares Holdco LLC ("Ares Holdco"), Ares Management Corporation ("Ares Management"), Ares Management GP LLC ("Ares Management GP"), Ares Voting LLC ("Ares Voting") and Ares Partners Holdco LLC ("Ares Partners", and together with the Ares Direct Holders, ACOF Investment Management, ASOF Investment Management, ASSF Operating Manager, Ares Management LLC, Ares Management Holdings, Ares Holdco, Ares Management, Ares Management GP, and Ares Voting, the "Reporting Persons"). Due to the electronic system's limitation of 10 Reporting Persons per joint filing, this statement is being filed in four parts.

F6 · balance_after: The Reporting Persons collectively beneficially own, or may be deemed to beneficially own, in the aggregate 35,205,125 shares of Common Stock (which aggregate ownership did not change as a result of the Transfers) by reason of the direct or indirect beneficial ownership of such shares as follows: (i) ACOF VI Frontier AIV A1 owns 249,805 shares of Common Stock; (ii) ACOF VI Frontier AIV A2 owns 89,581 shares of Common Stock; (iii) ACOF VI Frontier AIV A3 owns 20,902 shares of Common Stock; (iv) ACOF VI Frontier AIV A4 owns 271,730 shares of Common Stock; (v) ACOF VI Frontier AIV A5 owns 298,604 shares of Common Stock; (vi) ACOF VI Frontier AIV A6 owns 167,219 shares of Common Stock; (vii) ACOF VI Frontier AIV A7 owns 302,616 shares of Common Stock; (viii) ACOF VI Frontier AIV A8 owns shares 303,979 of Common Stock; (continued in next footnote)

F7 · balance_after: (ix) ACOF VI Frontier AIV A9 owns 285,466 shares of Common Stock; (x) ACOF VI Frontier AIV A10 owns 90,268 shares of Common Stock; (xi) ACOF VI Frontier AIV B1 owns 15,068,130 shares of Common Stock;(xii) ASOF Frontier AIV A1 owns 105,592 shares of Common Stock; (xiii) ASOF Frontier AIV A2 owns 18,032 shares of Common Stock; (xiv) ASOF Frontier AIV A3 owns 830,837 shares of Common Stock; (xv) ASOF Frontier AIV A4 owns 281,844 shares of Common Stock; (xvi) ASOF Frontier AIV A5 owns 167,160 shares of Common Stock; (xvii) ASOF Frontier AIV A6 owns 292,124 shares of Common Stock; (xviii) ASOF Frontier AIV A7 owns 289,417 shares of Common Stock; (xix) ASOF Frontier AIV A8 owns 238,026 shares of Common Stock; (xx) ASOF Frontier AIV A9 owns 360,644 shares of Common Stock; (xxi) ASOF Frontier AIV A10 owns 259,665 shares of Common Stock; (xxii) ASOF Frontier AIV A11 owns 245,236 shares of Common Stock; (continued in next footnote)

F8 · balance_after: (xiii) ASOF Frontier AIV B1 owns 9,597,579 shares of Common Stock; (xxiv) ASSF IV AIV B Holdings III owns 2,694,242 shares of Common Stock; and (xxv) ASSF IV AIV B directly or indirectly owns 2,654,041 shares of Common Stock. Because the aggregate number of shares of Common Stock sold by Ares Direct Holders in the Transfers equals the number of shares of Common Stock purchased by Ares Direct Holders in the Transfers, the total number of shares of Common Stock that Ares Management LLC (as well as ACOF Investment Management, ASOF Investment Management, ASSF Operating Manager, Ares Management Holdings, Ares Holdco, Ares Management Corporation, Ares Management GP, Ares Voting and Ares Partners Holdco), may be deemed to beneficially own did not change as a result of the Transfers.

F9 · balance_after: ACOF Investment Management is the manager of the ACOF Funds, ASOF Investment Management is the manager of ASOF Funds, ASSF Operating Manager is the manager of the ASSF Funds. Ares Management LLC is the sole member of ACOF Investment Management and ASOF Investment Management and the general partner of ASSF Operating Manager. Ares Management LLC has direct or indirect power to vote and/or dispose of the shares of Common Stock held by each Ares Direct Holder, and accordingly, Ares Management LLC may be deemed to have beneficial ownership of the shares of Common Stock reported herein. The sole member of Ares Management LLC is Ares Management Holdings and the general partner of Ares Management Holdings is Ares Holdco.

F10 · balance_after: The sole member of Ares Holdco is Ares Management. Ares Management GP is the sole holder of the Class B common stock, $0.01 par value per share, of Ares Management (the "Ares Class B Common Stock") and Ares Voting is the sole holder of the Class C common stock, $0.01 par value per share, of Ares Management (the "Ares Class C Common Stock"). (continued in next footnote)

F11 · balance_after: Pursuant to Ares Management's Certificate of Incorporation, the holders of the Ares Class B Common Stock and the Ares Class C Common Stock, collectively, will generally have the majority of the votes on any matter submitted to the stockholders of Ares Management if certain conditions are met. The sole member of both Ares Management GP and Ares Voting is Ares Partners. Ares Partners is managed by a board of managers, which is composed of Michael Arougheti, Ryan Berry, R. Kipp deVeer, David Kaplan, Antony Ressler and Bennett Rosenthal (collectively, the "Board Members"). Mr. Ressler generally has veto authority over decisions by the Board Members. (continued in next footnote)

F12 · balance_after: Each of the Reporting Persons, and the Board Members, and the other directors, officers, partners, stockholders, members and managers of the Reporting Persons, expressly disclaims beneficial ownership of the Common Stock, except to the extent of any pecuniary interest therein, and this Form 4 shall not be deemed an admission that any such person or entity is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purposes.

F2 · ownership.nature: This statement is being filed by ACOF VI Frontier AIV A1, L.P. ("ACOF VI Frontier AIV A1"), ACOF VI Frontier AIV A2, L.P. ("ACOF VI Frontier AIV A2"), ACOF VI Frontier AIV A3, L.P. ("ACOF VI Frontier AIV A3"), ACOF VI Frontier AIV A4, L.P. ("ACOF VI Frontier AIV A4"), ACOF VI Frontier AIV A5, L.P. ("ACOF VI Frontier AIV A5"), ACOF VI Frontier AIV A6, L.P. ("ACOF VI Frontier AIV A6"), ACOF VI Frontier AIV A7, L.P. ("ACOF VI Frontier AIV A7"), ACOF VI Frontier AIV A8, L.P. ("ACOF VI Frontier AIV A8"), ACOF VI Frontier AIV A9, L.P. ("ACOF VI Frontier AIV A9"), ACOF VI Frontier AIV A10, L.P. ("ACOF VI Frontier AIV A10"), and ACOF VI Frontier AIV B1, L.P. ("ACOF VI Frontier AIV B1", together with the foregoing entities, the "ACOF Funds"), (continued in next footnote)

F3 · ownership.nature: ASOF Frontier AIV A1, L.P. ("ASOF Frontier AIV A1"), ASOF Frontier AIV A2, L.P. ("ASOF Frontier AIV A2"), ASOF Frontier AIV A3, L.P. ("ASOF Frontier AIV A3"), ASOF Frontier AIV A4, L.P. ("ASOF Frontier AIV A4"), ASOF Frontier AIV A5, L.P. ("ASOF Frontier AIV A5"), ASOF Frontier AIV A6, L.P. ("ASOF Frontier AIV A6"), ASOF Frontier AIV A7, L.P. ("ASOF Frontier AIV A7"), ASOF Frontier AIV A8, L.P. ("ASOF Frontier AIV A8"), ASOF Frontier AIV A9, L.P. ("ASOF Frontier AIV A9"), ASOF Frontier AIV A10, L.P. ("ASOF Frontier AIV A10"), ASOF Frontier AIV A11, L.P. ("ASOF Frontier AIV A11"), (continued in next footnote)

F4 · ownership.nature: and ASOF Frontier AIV B1, L.P. ("ASOF Frontier AIV B1", together with ASOF Frontier AIV A1, ASOF Frontier AIV A2, ASOF Frontier AIV A3, ASOF Frontier AIV A4, ASOF Frontier AIV A5, ASOF Frontier AIV A6, ASOF Frontier AIV A7, ASOF Frontier AIV A8, ASOF Frontier AIV A9, ASOF Frontier AIV A10, and ASOF Frontier AIV A11, the "ASOF Funds"), ASSF IV AIV B Holdings III, L.P. ("ASSF IV AIV B Holdings III"), ASSF IV AIV B, L.P. ("ASSF IV AIV B", and together with ASSF IV AIV B Holdings III, the "ASSF Funds", and together with the ACOF Funds, and the ASOF Funds, the "Ares Direct Holders"), (continued in next footnote)

F5 · ownership.nature: ACOF Investment Management LLC ("ACOF Investment Management"), ASOF Investment Management LLC ("ASOF Investment Management"), ASSF Operating Manager IV, L.P. ("ASSF Operating Manager"), Ares Management LLC, Ares Management Holdings L.P. ("Ares Management Holdings"), Ares Holdco LLC ("Ares Holdco"), Ares Management Corporation ("Ares Management"), Ares Management GP LLC ("Ares Management GP"), Ares Voting LLC ("Ares Voting") and Ares Partners Holdco LLC ("Ares Partners", and together with the Ares Direct Holders, ACOF Investment Management, ASOF Investment Management, ASSF Operating Manager, Ares Management LLC, Ares Management Holdings, Ares Holdco, Ares Management, Ares Management GP, and Ares Voting, the "Reporting Persons"). Due to the electronic system's limitation of 10 Reporting Persons per joint filing, this statement is being filed in four parts.

F6 · ownership.nature: The Reporting Persons collectively beneficially own, or may be deemed to beneficially own, in the aggregate 35,205,125 shares of Common Stock (which aggregate ownership did not change as a result of the Transfers) by reason of the direct or indirect beneficial ownership of such shares as follows: (i) ACOF VI Frontier AIV A1 owns 249,805 shares of Common Stock; (ii) ACOF VI Frontier AIV A2 owns 89,581 shares of Common Stock; (iii) ACOF VI Frontier AIV A3 owns 20,902 shares of Common Stock; (iv) ACOF VI Frontier AIV A4 owns 271,730 shares of Common Stock; (v) ACOF VI Frontier AIV A5 owns 298,604 shares of Common Stock; (vi) ACOF VI Frontier AIV A6 owns 167,219 shares of Common Stock; (vii) ACOF VI Frontier AIV A7 owns 302,616 shares of Common Stock; (viii) ACOF VI Frontier AIV A8 owns shares 303,979 of Common Stock; (continued in next footnote)

F7 · ownership.nature: (ix) ACOF VI Frontier AIV A9 owns 285,466 shares of Common Stock; (x) ACOF VI Frontier AIV A10 owns 90,268 shares of Common Stock; (xi) ACOF VI Frontier AIV B1 owns 15,068,130 shares of Common Stock;(xii) ASOF Frontier AIV A1 owns 105,592 shares of Common Stock; (xiii) ASOF Frontier AIV A2 owns 18,032 shares of Common Stock; (xiv) ASOF Frontier AIV A3 owns 830,837 shares of Common Stock; (xv) ASOF Frontier AIV A4 owns 281,844 shares of Common Stock; (xvi) ASOF Frontier AIV A5 owns 167,160 shares of Common Stock; (xvii) ASOF Frontier AIV A6 owns 292,124 shares of Common Stock; (xviii) ASOF Frontier AIV A7 owns 289,417 shares of Common Stock; (xix) ASOF Frontier AIV A8 owns 238,026 shares of Common Stock; (xx) ASOF Frontier AIV A9 owns 360,644 shares of Common Stock; (xxi) ASOF Frontier AIV A10 owns 259,665 shares of Common Stock; (xxii) ASOF Frontier AIV A11 owns 245,236 shares of Common Stock; (continued in next footnote)

F8 · ownership.nature: (xiii) ASOF Frontier AIV B1 owns 9,597,579 shares of Common Stock; (xxiv) ASSF IV AIV B Holdings III owns 2,694,242 shares of Common Stock; and (xxv) ASSF IV AIV B directly or indirectly owns 2,654,041 shares of Common Stock. Because the aggregate number of shares of Common Stock sold by Ares Direct Holders in the Transfers equals the number of shares of Common Stock purchased by Ares Direct Holders in the Transfers, the total number of shares of Common Stock that Ares Management LLC (as well as ACOF Investment Management, ASOF Investment Management, ASSF Operating Manager, Ares Management Holdings, Ares Holdco, Ares Management Corporation, Ares Management GP, Ares Voting and Ares Partners Holdco), may be deemed to beneficially own did not change as a result of the Transfers.

F9 · ownership.nature: ACOF Investment Management is the manager of the ACOF Funds, ASOF Investment Management is the manager of ASOF Funds, ASSF Operating Manager is the manager of the ASSF Funds. Ares Management LLC is the sole member of ACOF Investment Management and ASOF Investment Management and the general partner of ASSF Operating Manager. Ares Management LLC has direct or indirect power to vote and/or dispose of the shares of Common Stock held by each Ares Direct Holder, and accordingly, Ares Management LLC may be deemed to have beneficial ownership of the shares of Common Stock reported herein. The sole member of Ares Management LLC is Ares Management Holdings and the general partner of Ares Management Holdings is Ares Holdco.

F10 · ownership.nature: The sole member of Ares Holdco is Ares Management. Ares Management GP is the sole holder of the Class B common stock, $0.01 par value per share, of Ares Management (the "Ares Class B Common Stock") and Ares Voting is the sole holder of the Class C common stock, $0.01 par value per share, of Ares Management (the "Ares Class C Common Stock"). (continued in next footnote)

F11 · ownership.nature: Pursuant to Ares Management's Certificate of Incorporation, the holders of the Ares Class B Common Stock and the Ares Class C Common Stock, collectively, will generally have the majority of the votes on any matter submitted to the stockholders of Ares Management if certain conditions are met. The sole member of both Ares Management GP and Ares Voting is Ares Partners. Ares Partners is managed by a board of managers, which is composed of Michael Arougheti, Ryan Berry, R. Kipp deVeer, David Kaplan, Antony Ressler and Bennett Rosenthal (collectively, the "Board Members"). Mr. Ressler generally has veto authority over decisions by the Board Members. (continued in next footnote)

F12 · ownership.nature: Each of the Reporting Persons, and the Board Members, and the other directors, officers, partners, stockholders, members and managers of the Reporting Persons, expressly disclaims beneficial ownership of the Common Stock, except to the extent of any pecuniary interest therein, and this Form 4 shall not be deemed an admission that any such person or entity is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purposes.

SEC source: 0001104659-21-120390 · tm2128492-1_4seq1.xml · nonDerivative · entry 22

ARES MANAGEMENT LLC · CIK 0001259313 · 10% owner

ACOF VI Frontier AIV A1, L.P. · CIK 0001862494 · 10% owner

ACOF VI Frontier AIV A2, L.P. · CIK 0001862499 · 10% owner

ACOF VI Frontier AIV A3, L.P. · CIK 0001862534 · 10% owner

ACOF VI Frontier AIV A4, L.P. · CIK 0001862529 · 10% owner

ACOF VI Frontier AIV A5, L.P. · CIK 0001862526 · 10% owner

ACOF VI Frontier AIV A6, L.P. · CIK 0001862483 · 10% owner

ACOF VI Frontier AIV A7, L.P. · CIK 0001862482 · 10% owner

ACOF VI Frontier AIV A8, L.P. · CIK 0001862505 · 10% owner

ACOF VI Frontier AIV A9, L.P. · CIK 0001862533 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · ACOF VI Frontier AIV A10, L.P.

Disclosed balance after: 90,268

F1 · kind: These transactions reflect inter-fund transfers (the "Transfers") of shares of the Issuer's Common Stock from one Ares Direct Holder (as defined below) to another Ares Direct Holder in connection with an internal rebalancing of such Ares Direct Holders' holdings of Common Stock. Each Transfer occurred at the same time and at the same price.

F2 · balance_after: This statement is being filed by ACOF VI Frontier AIV A1, L.P. ("ACOF VI Frontier AIV A1"), ACOF VI Frontier AIV A2, L.P. ("ACOF VI Frontier AIV A2"), ACOF VI Frontier AIV A3, L.P. ("ACOF VI Frontier AIV A3"), ACOF VI Frontier AIV A4, L.P. ("ACOF VI Frontier AIV A4"), ACOF VI Frontier AIV A5, L.P. ("ACOF VI Frontier AIV A5"), ACOF VI Frontier AIV A6, L.P. ("ACOF VI Frontier AIV A6"), ACOF VI Frontier AIV A7, L.P. ("ACOF VI Frontier AIV A7"), ACOF VI Frontier AIV A8, L.P. ("ACOF VI Frontier AIV A8"), ACOF VI Frontier AIV A9, L.P. ("ACOF VI Frontier AIV A9"), ACOF VI Frontier AIV A10, L.P. ("ACOF VI Frontier AIV A10"), and ACOF VI Frontier AIV B1, L.P. ("ACOF VI Frontier AIV B1", together with the foregoing entities, the "ACOF Funds"), (continued in next footnote)

F3 · balance_after: ASOF Frontier AIV A1, L.P. ("ASOF Frontier AIV A1"), ASOF Frontier AIV A2, L.P. ("ASOF Frontier AIV A2"), ASOF Frontier AIV A3, L.P. ("ASOF Frontier AIV A3"), ASOF Frontier AIV A4, L.P. ("ASOF Frontier AIV A4"), ASOF Frontier AIV A5, L.P. ("ASOF Frontier AIV A5"), ASOF Frontier AIV A6, L.P. ("ASOF Frontier AIV A6"), ASOF Frontier AIV A7, L.P. ("ASOF Frontier AIV A7"), ASOF Frontier AIV A8, L.P. ("ASOF Frontier AIV A8"), ASOF Frontier AIV A9, L.P. ("ASOF Frontier AIV A9"), ASOF Frontier AIV A10, L.P. ("ASOF Frontier AIV A10"), ASOF Frontier AIV A11, L.P. ("ASOF Frontier AIV A11"), (continued in next footnote)

F4 · balance_after: and ASOF Frontier AIV B1, L.P. ("ASOF Frontier AIV B1", together with ASOF Frontier AIV A1, ASOF Frontier AIV A2, ASOF Frontier AIV A3, ASOF Frontier AIV A4, ASOF Frontier AIV A5, ASOF Frontier AIV A6, ASOF Frontier AIV A7, ASOF Frontier AIV A8, ASOF Frontier AIV A9, ASOF Frontier AIV A10, and ASOF Frontier AIV A11, the "ASOF Funds"), ASSF IV AIV B Holdings III, L.P. ("ASSF IV AIV B Holdings III"), ASSF IV AIV B, L.P. ("ASSF IV AIV B", and together with ASSF IV AIV B Holdings III, the "ASSF Funds", and together with the ACOF Funds, and the ASOF Funds, the "Ares Direct Holders"), (continued in next footnote)

F5 · balance_after: ACOF Investment Management LLC ("ACOF Investment Management"), ASOF Investment Management LLC ("ASOF Investment Management"), ASSF Operating Manager IV, L.P. ("ASSF Operating Manager"), Ares Management LLC, Ares Management Holdings L.P. ("Ares Management Holdings"), Ares Holdco LLC ("Ares Holdco"), Ares Management Corporation ("Ares Management"), Ares Management GP LLC ("Ares Management GP"), Ares Voting LLC ("Ares Voting") and Ares Partners Holdco LLC ("Ares Partners", and together with the Ares Direct Holders, ACOF Investment Management, ASOF Investment Management, ASSF Operating Manager, Ares Management LLC, Ares Management Holdings, Ares Holdco, Ares Management, Ares Management GP, and Ares Voting, the "Reporting Persons"). Due to the electronic system's limitation of 10 Reporting Persons per joint filing, this statement is being filed in four parts.

F6 · balance_after: The Reporting Persons collectively beneficially own, or may be deemed to beneficially own, in the aggregate 35,205,125 shares of Common Stock (which aggregate ownership did not change as a result of the Transfers) by reason of the direct or indirect beneficial ownership of such shares as follows: (i) ACOF VI Frontier AIV A1 owns 249,805 shares of Common Stock; (ii) ACOF VI Frontier AIV A2 owns 89,581 shares of Common Stock; (iii) ACOF VI Frontier AIV A3 owns 20,902 shares of Common Stock; (iv) ACOF VI Frontier AIV A4 owns 271,730 shares of Common Stock; (v) ACOF VI Frontier AIV A5 owns 298,604 shares of Common Stock; (vi) ACOF VI Frontier AIV A6 owns 167,219 shares of Common Stock; (vii) ACOF VI Frontier AIV A7 owns 302,616 shares of Common Stock; (viii) ACOF VI Frontier AIV A8 owns shares 303,979 of Common Stock; (continued in next footnote)

F7 · balance_after: (ix) ACOF VI Frontier AIV A9 owns 285,466 shares of Common Stock; (x) ACOF VI Frontier AIV A10 owns 90,268 shares of Common Stock; (xi) ACOF VI Frontier AIV B1 owns 15,068,130 shares of Common Stock;(xii) ASOF Frontier AIV A1 owns 105,592 shares of Common Stock; (xiii) ASOF Frontier AIV A2 owns 18,032 shares of Common Stock; (xiv) ASOF Frontier AIV A3 owns 830,837 shares of Common Stock; (xv) ASOF Frontier AIV A4 owns 281,844 shares of Common Stock; (xvi) ASOF Frontier AIV A5 owns 167,160 shares of Common Stock; (xvii) ASOF Frontier AIV A6 owns 292,124 shares of Common Stock; (xviii) ASOF Frontier AIV A7 owns 289,417 shares of Common Stock; (xix) ASOF Frontier AIV A8 owns 238,026 shares of Common Stock; (xx) ASOF Frontier AIV A9 owns 360,644 shares of Common Stock; (xxi) ASOF Frontier AIV A10 owns 259,665 shares of Common Stock; (xxii) ASOF Frontier AIV A11 owns 245,236 shares of Common Stock; (continued in next footnote)

F8 · balance_after: (xiii) ASOF Frontier AIV B1 owns 9,597,579 shares of Common Stock; (xxiv) ASSF IV AIV B Holdings III owns 2,694,242 shares of Common Stock; and (xxv) ASSF IV AIV B directly or indirectly owns 2,654,041 shares of Common Stock. Because the aggregate number of shares of Common Stock sold by Ares Direct Holders in the Transfers equals the number of shares of Common Stock purchased by Ares Direct Holders in the Transfers, the total number of shares of Common Stock that Ares Management LLC (as well as ACOF Investment Management, ASOF Investment Management, ASSF Operating Manager, Ares Management Holdings, Ares Holdco, Ares Management Corporation, Ares Management GP, Ares Voting and Ares Partners Holdco), may be deemed to beneficially own did not change as a result of the Transfers.

F9 · balance_after: ACOF Investment Management is the manager of the ACOF Funds, ASOF Investment Management is the manager of ASOF Funds, ASSF Operating Manager is the manager of the ASSF Funds. Ares Management LLC is the sole member of ACOF Investment Management and ASOF Investment Management and the general partner of ASSF Operating Manager. Ares Management LLC has direct or indirect power to vote and/or dispose of the shares of Common Stock held by each Ares Direct Holder, and accordingly, Ares Management LLC may be deemed to have beneficial ownership of the shares of Common Stock reported herein. The sole member of Ares Management LLC is Ares Management Holdings and the general partner of Ares Management Holdings is Ares Holdco.

F10 · balance_after: The sole member of Ares Holdco is Ares Management. Ares Management GP is the sole holder of the Class B common stock, $0.01 par value per share, of Ares Management (the "Ares Class B Common Stock") and Ares Voting is the sole holder of the Class C common stock, $0.01 par value per share, of Ares Management (the "Ares Class C Common Stock"). (continued in next footnote)

F11 · balance_after: Pursuant to Ares Management's Certificate of Incorporation, the holders of the Ares Class B Common Stock and the Ares Class C Common Stock, collectively, will generally have the majority of the votes on any matter submitted to the stockholders of Ares Management if certain conditions are met. The sole member of both Ares Management GP and Ares Voting is Ares Partners. Ares Partners is managed by a board of managers, which is composed of Michael Arougheti, Ryan Berry, R. Kipp deVeer, David Kaplan, Antony Ressler and Bennett Rosenthal (collectively, the "Board Members"). Mr. Ressler generally has veto authority over decisions by the Board Members. (continued in next footnote)

F12 · balance_after: Each of the Reporting Persons, and the Board Members, and the other directors, officers, partners, stockholders, members and managers of the Reporting Persons, expressly disclaims beneficial ownership of the Common Stock, except to the extent of any pecuniary interest therein, and this Form 4 shall not be deemed an admission that any such person or entity is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purposes.

F2 · ownership.nature: This statement is being filed by ACOF VI Frontier AIV A1, L.P. ("ACOF VI Frontier AIV A1"), ACOF VI Frontier AIV A2, L.P. ("ACOF VI Frontier AIV A2"), ACOF VI Frontier AIV A3, L.P. ("ACOF VI Frontier AIV A3"), ACOF VI Frontier AIV A4, L.P. ("ACOF VI Frontier AIV A4"), ACOF VI Frontier AIV A5, L.P. ("ACOF VI Frontier AIV A5"), ACOF VI Frontier AIV A6, L.P. ("ACOF VI Frontier AIV A6"), ACOF VI Frontier AIV A7, L.P. ("ACOF VI Frontier AIV A7"), ACOF VI Frontier AIV A8, L.P. ("ACOF VI Frontier AIV A8"), ACOF VI Frontier AIV A9, L.P. ("ACOF VI Frontier AIV A9"), ACOF VI Frontier AIV A10, L.P. ("ACOF VI Frontier AIV A10"), and ACOF VI Frontier AIV B1, L.P. ("ACOF VI Frontier AIV B1", together with the foregoing entities, the "ACOF Funds"), (continued in next footnote)

F3 · ownership.nature: ASOF Frontier AIV A1, L.P. ("ASOF Frontier AIV A1"), ASOF Frontier AIV A2, L.P. ("ASOF Frontier AIV A2"), ASOF Frontier AIV A3, L.P. ("ASOF Frontier AIV A3"), ASOF Frontier AIV A4, L.P. ("ASOF Frontier AIV A4"), ASOF Frontier AIV A5, L.P. ("ASOF Frontier AIV A5"), ASOF Frontier AIV A6, L.P. ("ASOF Frontier AIV A6"), ASOF Frontier AIV A7, L.P. ("ASOF Frontier AIV A7"), ASOF Frontier AIV A8, L.P. ("ASOF Frontier AIV A8"), ASOF Frontier AIV A9, L.P. ("ASOF Frontier AIV A9"), ASOF Frontier AIV A10, L.P. ("ASOF Frontier AIV A10"), ASOF Frontier AIV A11, L.P. ("ASOF Frontier AIV A11"), (continued in next footnote)

F4 · ownership.nature: and ASOF Frontier AIV B1, L.P. ("ASOF Frontier AIV B1", together with ASOF Frontier AIV A1, ASOF Frontier AIV A2, ASOF Frontier AIV A3, ASOF Frontier AIV A4, ASOF Frontier AIV A5, ASOF Frontier AIV A6, ASOF Frontier AIV A7, ASOF Frontier AIV A8, ASOF Frontier AIV A9, ASOF Frontier AIV A10, and ASOF Frontier AIV A11, the "ASOF Funds"), ASSF IV AIV B Holdings III, L.P. ("ASSF IV AIV B Holdings III"), ASSF IV AIV B, L.P. ("ASSF IV AIV B", and together with ASSF IV AIV B Holdings III, the "ASSF Funds", and together with the ACOF Funds, and the ASOF Funds, the "Ares Direct Holders"), (continued in next footnote)

F5 · ownership.nature: ACOF Investment Management LLC ("ACOF Investment Management"), ASOF Investment Management LLC ("ASOF Investment Management"), ASSF Operating Manager IV, L.P. ("ASSF Operating Manager"), Ares Management LLC, Ares Management Holdings L.P. ("Ares Management Holdings"), Ares Holdco LLC ("Ares Holdco"), Ares Management Corporation ("Ares Management"), Ares Management GP LLC ("Ares Management GP"), Ares Voting LLC ("Ares Voting") and Ares Partners Holdco LLC ("Ares Partners", and together with the Ares Direct Holders, ACOF Investment Management, ASOF Investment Management, ASSF Operating Manager, Ares Management LLC, Ares Management Holdings, Ares Holdco, Ares Management, Ares Management GP, and Ares Voting, the "Reporting Persons"). Due to the electronic system's limitation of 10 Reporting Persons per joint filing, this statement is being filed in four parts.

F6 · ownership.nature: The Reporting Persons collectively beneficially own, or may be deemed to beneficially own, in the aggregate 35,205,125 shares of Common Stock (which aggregate ownership did not change as a result of the Transfers) by reason of the direct or indirect beneficial ownership of such shares as follows: (i) ACOF VI Frontier AIV A1 owns 249,805 shares of Common Stock; (ii) ACOF VI Frontier AIV A2 owns 89,581 shares of Common Stock; (iii) ACOF VI Frontier AIV A3 owns 20,902 shares of Common Stock; (iv) ACOF VI Frontier AIV A4 owns 271,730 shares of Common Stock; (v) ACOF VI Frontier AIV A5 owns 298,604 shares of Common Stock; (vi) ACOF VI Frontier AIV A6 owns 167,219 shares of Common Stock; (vii) ACOF VI Frontier AIV A7 owns 302,616 shares of Common Stock; (viii) ACOF VI Frontier AIV A8 owns shares 303,979 of Common Stock; (continued in next footnote)

F7 · ownership.nature: (ix) ACOF VI Frontier AIV A9 owns 285,466 shares of Common Stock; (x) ACOF VI Frontier AIV A10 owns 90,268 shares of Common Stock; (xi) ACOF VI Frontier AIV B1 owns 15,068,130 shares of Common Stock;(xii) ASOF Frontier AIV A1 owns 105,592 shares of Common Stock; (xiii) ASOF Frontier AIV A2 owns 18,032 shares of Common Stock; (xiv) ASOF Frontier AIV A3 owns 830,837 shares of Common Stock; (xv) ASOF Frontier AIV A4 owns 281,844 shares of Common Stock; (xvi) ASOF Frontier AIV A5 owns 167,160 shares of Common Stock; (xvii) ASOF Frontier AIV A6 owns 292,124 shares of Common Stock; (xviii) ASOF Frontier AIV A7 owns 289,417 shares of Common Stock; (xix) ASOF Frontier AIV A8 owns 238,026 shares of Common Stock; (xx) ASOF Frontier AIV A9 owns 360,644 shares of Common Stock; (xxi) ASOF Frontier AIV A10 owns 259,665 shares of Common Stock; (xxii) ASOF Frontier AIV A11 owns 245,236 shares of Common Stock; (continued in next footnote)

F8 · ownership.nature: (xiii) ASOF Frontier AIV B1 owns 9,597,579 shares of Common Stock; (xxiv) ASSF IV AIV B Holdings III owns 2,694,242 shares of Common Stock; and (xxv) ASSF IV AIV B directly or indirectly owns 2,654,041 shares of Common Stock. Because the aggregate number of shares of Common Stock sold by Ares Direct Holders in the Transfers equals the number of shares of Common Stock purchased by Ares Direct Holders in the Transfers, the total number of shares of Common Stock that Ares Management LLC (as well as ACOF Investment Management, ASOF Investment Management, ASSF Operating Manager, Ares Management Holdings, Ares Holdco, Ares Management Corporation, Ares Management GP, Ares Voting and Ares Partners Holdco), may be deemed to beneficially own did not change as a result of the Transfers.

F9 · ownership.nature: ACOF Investment Management is the manager of the ACOF Funds, ASOF Investment Management is the manager of ASOF Funds, ASSF Operating Manager is the manager of the ASSF Funds. Ares Management LLC is the sole member of ACOF Investment Management and ASOF Investment Management and the general partner of ASSF Operating Manager. Ares Management LLC has direct or indirect power to vote and/or dispose of the shares of Common Stock held by each Ares Direct Holder, and accordingly, Ares Management LLC may be deemed to have beneficial ownership of the shares of Common Stock reported herein. The sole member of Ares Management LLC is Ares Management Holdings and the general partner of Ares Management Holdings is Ares Holdco.

F10 · ownership.nature: The sole member of Ares Holdco is Ares Management. Ares Management GP is the sole holder of the Class B common stock, $0.01 par value per share, of Ares Management (the "Ares Class B Common Stock") and Ares Voting is the sole holder of the Class C common stock, $0.01 par value per share, of Ares Management (the "Ares Class C Common Stock"). (continued in next footnote)

F11 · ownership.nature: Pursuant to Ares Management's Certificate of Incorporation, the holders of the Ares Class B Common Stock and the Ares Class C Common Stock, collectively, will generally have the majority of the votes on any matter submitted to the stockholders of Ares Management if certain conditions are met. The sole member of both Ares Management GP and Ares Voting is Ares Partners. Ares Partners is managed by a board of managers, which is composed of Michael Arougheti, Ryan Berry, R. Kipp deVeer, David Kaplan, Antony Ressler and Bennett Rosenthal (collectively, the "Board Members"). Mr. Ressler generally has veto authority over decisions by the Board Members. (continued in next footnote)

F12 · ownership.nature: Each of the Reporting Persons, and the Board Members, and the other directors, officers, partners, stockholders, members and managers of the Reporting Persons, expressly disclaims beneficial ownership of the Common Stock, except to the extent of any pecuniary interest therein, and this Form 4 shall not be deemed an admission that any such person or entity is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purposes.

SEC source: 0001104659-21-120390 · tm2128492-1_4seq1.xml · nonDerivative · entry 21

ARES MANAGEMENT LLC · CIK 0001259313 · 10% owner

ACOF VI Frontier AIV A1, L.P. · CIK 0001862494 · 10% owner

ACOF VI Frontier AIV A2, L.P. · CIK 0001862499 · 10% owner

ACOF VI Frontier AIV A3, L.P. · CIK 0001862534 · 10% owner

ACOF VI Frontier AIV A4, L.P. · CIK 0001862529 · 10% owner

ACOF VI Frontier AIV A5, L.P. · CIK 0001862526 · 10% owner

ACOF VI Frontier AIV A6, L.P. · CIK 0001862483 · 10% owner

ACOF VI Frontier AIV A7, L.P. · CIK 0001862482 · 10% owner

ACOF VI Frontier AIV A8, L.P. · CIK 0001862505 · 10% owner

ACOF VI Frontier AIV A9, L.P. · CIK 0001862533 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · ACOF VI Frontier AIV A9, L.P.

Disclosed balance after: 285,466

F1 · kind: These transactions reflect inter-fund transfers (the "Transfers") of shares of the Issuer's Common Stock from one Ares Direct Holder (as defined below) to another Ares Direct Holder in connection with an internal rebalancing of such Ares Direct Holders' holdings of Common Stock. Each Transfer occurred at the same time and at the same price.

F2 · balance_after: This statement is being filed by ACOF VI Frontier AIV A1, L.P. ("ACOF VI Frontier AIV A1"), ACOF VI Frontier AIV A2, L.P. ("ACOF VI Frontier AIV A2"), ACOF VI Frontier AIV A3, L.P. ("ACOF VI Frontier AIV A3"), ACOF VI Frontier AIV A4, L.P. ("ACOF VI Frontier AIV A4"), ACOF VI Frontier AIV A5, L.P. ("ACOF VI Frontier AIV A5"), ACOF VI Frontier AIV A6, L.P. ("ACOF VI Frontier AIV A6"), ACOF VI Frontier AIV A7, L.P. ("ACOF VI Frontier AIV A7"), ACOF VI Frontier AIV A8, L.P. ("ACOF VI Frontier AIV A8"), ACOF VI Frontier AIV A9, L.P. ("ACOF VI Frontier AIV A9"), ACOF VI Frontier AIV A10, L.P. ("ACOF VI Frontier AIV A10"), and ACOF VI Frontier AIV B1, L.P. ("ACOF VI Frontier AIV B1", together with the foregoing entities, the "ACOF Funds"), (continued in next footnote)

F3 · balance_after: ASOF Frontier AIV A1, L.P. ("ASOF Frontier AIV A1"), ASOF Frontier AIV A2, L.P. ("ASOF Frontier AIV A2"), ASOF Frontier AIV A3, L.P. ("ASOF Frontier AIV A3"), ASOF Frontier AIV A4, L.P. ("ASOF Frontier AIV A4"), ASOF Frontier AIV A5, L.P. ("ASOF Frontier AIV A5"), ASOF Frontier AIV A6, L.P. ("ASOF Frontier AIV A6"), ASOF Frontier AIV A7, L.P. ("ASOF Frontier AIV A7"), ASOF Frontier AIV A8, L.P. ("ASOF Frontier AIV A8"), ASOF Frontier AIV A9, L.P. ("ASOF Frontier AIV A9"), ASOF Frontier AIV A10, L.P. ("ASOF Frontier AIV A10"), ASOF Frontier AIV A11, L.P. ("ASOF Frontier AIV A11"), (continued in next footnote)

F4 · balance_after: and ASOF Frontier AIV B1, L.P. ("ASOF Frontier AIV B1", together with ASOF Frontier AIV A1, ASOF Frontier AIV A2, ASOF Frontier AIV A3, ASOF Frontier AIV A4, ASOF Frontier AIV A5, ASOF Frontier AIV A6, ASOF Frontier AIV A7, ASOF Frontier AIV A8, ASOF Frontier AIV A9, ASOF Frontier AIV A10, and ASOF Frontier AIV A11, the "ASOF Funds"), ASSF IV AIV B Holdings III, L.P. ("ASSF IV AIV B Holdings III"), ASSF IV AIV B, L.P. ("ASSF IV AIV B", and together with ASSF IV AIV B Holdings III, the "ASSF Funds", and together with the ACOF Funds, and the ASOF Funds, the "Ares Direct Holders"), (continued in next footnote)

F5 · balance_after: ACOF Investment Management LLC ("ACOF Investment Management"), ASOF Investment Management LLC ("ASOF Investment Management"), ASSF Operating Manager IV, L.P. ("ASSF Operating Manager"), Ares Management LLC, Ares Management Holdings L.P. ("Ares Management Holdings"), Ares Holdco LLC ("Ares Holdco"), Ares Management Corporation ("Ares Management"), Ares Management GP LLC ("Ares Management GP"), Ares Voting LLC ("Ares Voting") and Ares Partners Holdco LLC ("Ares Partners", and together with the Ares Direct Holders, ACOF Investment Management, ASOF Investment Management, ASSF Operating Manager, Ares Management LLC, Ares Management Holdings, Ares Holdco, Ares Management, Ares Management GP, and Ares Voting, the "Reporting Persons"). Due to the electronic system's limitation of 10 Reporting Persons per joint filing, this statement is being filed in four parts.

F6 · balance_after: The Reporting Persons collectively beneficially own, or may be deemed to beneficially own, in the aggregate 35,205,125 shares of Common Stock (which aggregate ownership did not change as a result of the Transfers) by reason of the direct or indirect beneficial ownership of such shares as follows: (i) ACOF VI Frontier AIV A1 owns 249,805 shares of Common Stock; (ii) ACOF VI Frontier AIV A2 owns 89,581 shares of Common Stock; (iii) ACOF VI Frontier AIV A3 owns 20,902 shares of Common Stock; (iv) ACOF VI Frontier AIV A4 owns 271,730 shares of Common Stock; (v) ACOF VI Frontier AIV A5 owns 298,604 shares of Common Stock; (vi) ACOF VI Frontier AIV A6 owns 167,219 shares of Common Stock; (vii) ACOF VI Frontier AIV A7 owns 302,616 shares of Common Stock; (viii) ACOF VI Frontier AIV A8 owns shares 303,979 of Common Stock; (continued in next footnote)

F7 · balance_after: (ix) ACOF VI Frontier AIV A9 owns 285,466 shares of Common Stock; (x) ACOF VI Frontier AIV A10 owns 90,268 shares of Common Stock; (xi) ACOF VI Frontier AIV B1 owns 15,068,130 shares of Common Stock;(xii) ASOF Frontier AIV A1 owns 105,592 shares of Common Stock; (xiii) ASOF Frontier AIV A2 owns 18,032 shares of Common Stock; (xiv) ASOF Frontier AIV A3 owns 830,837 shares of Common Stock; (xv) ASOF Frontier AIV A4 owns 281,844 shares of Common Stock; (xvi) ASOF Frontier AIV A5 owns 167,160 shares of Common Stock; (xvii) ASOF Frontier AIV A6 owns 292,124 shares of Common Stock; (xviii) ASOF Frontier AIV A7 owns 289,417 shares of Common Stock; (xix) ASOF Frontier AIV A8 owns 238,026 shares of Common Stock; (xx) ASOF Frontier AIV A9 owns 360,644 shares of Common Stock; (xxi) ASOF Frontier AIV A10 owns 259,665 shares of Common Stock; (xxii) ASOF Frontier AIV A11 owns 245,236 shares of Common Stock; (continued in next footnote)

F8 · balance_after: (xiii) ASOF Frontier AIV B1 owns 9,597,579 shares of Common Stock; (xxiv) ASSF IV AIV B Holdings III owns 2,694,242 shares of Common Stock; and (xxv) ASSF IV AIV B directly or indirectly owns 2,654,041 shares of Common Stock. Because the aggregate number of shares of Common Stock sold by Ares Direct Holders in the Transfers equals the number of shares of Common Stock purchased by Ares Direct Holders in the Transfers, the total number of shares of Common Stock that Ares Management LLC (as well as ACOF Investment Management, ASOF Investment Management, ASSF Operating Manager, Ares Management Holdings, Ares Holdco, Ares Management Corporation, Ares Management GP, Ares Voting and Ares Partners Holdco), may be deemed to beneficially own did not change as a result of the Transfers.

F9 · balance_after: ACOF Investment Management is the manager of the ACOF Funds, ASOF Investment Management is the manager of ASOF Funds, ASSF Operating Manager is the manager of the ASSF Funds. Ares Management LLC is the sole member of ACOF Investment Management and ASOF Investment Management and the general partner of ASSF Operating Manager. Ares Management LLC has direct or indirect power to vote and/or dispose of the shares of Common Stock held by each Ares Direct Holder, and accordingly, Ares Management LLC may be deemed to have beneficial ownership of the shares of Common Stock reported herein. The sole member of Ares Management LLC is Ares Management Holdings and the general partner of Ares Management Holdings is Ares Holdco.

F10 · balance_after: The sole member of Ares Holdco is Ares Management. Ares Management GP is the sole holder of the Class B common stock, $0.01 par value per share, of Ares Management (the "Ares Class B Common Stock") and Ares Voting is the sole holder of the Class C common stock, $0.01 par value per share, of Ares Management (the "Ares Class C Common Stock"). (continued in next footnote)

F11 · balance_after: Pursuant to Ares Management's Certificate of Incorporation, the holders of the Ares Class B Common Stock and the Ares Class C Common Stock, collectively, will generally have the majority of the votes on any matter submitted to the stockholders of Ares Management if certain conditions are met. The sole member of both Ares Management GP and Ares Voting is Ares Partners. Ares Partners is managed by a board of managers, which is composed of Michael Arougheti, Ryan Berry, R. Kipp deVeer, David Kaplan, Antony Ressler and Bennett Rosenthal (collectively, the "Board Members"). Mr. Ressler generally has veto authority over decisions by the Board Members. (continued in next footnote)

F12 · balance_after: Each of the Reporting Persons, and the Board Members, and the other directors, officers, partners, stockholders, members and managers of the Reporting Persons, expressly disclaims beneficial ownership of the Common Stock, except to the extent of any pecuniary interest therein, and this Form 4 shall not be deemed an admission that any such person or entity is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purposes.

F2 · ownership.nature: This statement is being filed by ACOF VI Frontier AIV A1, L.P. ("ACOF VI Frontier AIV A1"), ACOF VI Frontier AIV A2, L.P. ("ACOF VI Frontier AIV A2"), ACOF VI Frontier AIV A3, L.P. ("ACOF VI Frontier AIV A3"), ACOF VI Frontier AIV A4, L.P. ("ACOF VI Frontier AIV A4"), ACOF VI Frontier AIV A5, L.P. ("ACOF VI Frontier AIV A5"), ACOF VI Frontier AIV A6, L.P. ("ACOF VI Frontier AIV A6"), ACOF VI Frontier AIV A7, L.P. ("ACOF VI Frontier AIV A7"), ACOF VI Frontier AIV A8, L.P. ("ACOF VI Frontier AIV A8"), ACOF VI Frontier AIV A9, L.P. ("ACOF VI Frontier AIV A9"), ACOF VI Frontier AIV A10, L.P. ("ACOF VI Frontier AIV A10"), and ACOF VI Frontier AIV B1, L.P. ("ACOF VI Frontier AIV B1", together with the foregoing entities, the "ACOF Funds"), (continued in next footnote)

F3 · ownership.nature: ASOF Frontier AIV A1, L.P. ("ASOF Frontier AIV A1"), ASOF Frontier AIV A2, L.P. ("ASOF Frontier AIV A2"), ASOF Frontier AIV A3, L.P. ("ASOF Frontier AIV A3"), ASOF Frontier AIV A4, L.P. ("ASOF Frontier AIV A4"), ASOF Frontier AIV A5, L.P. ("ASOF Frontier AIV A5"), ASOF Frontier AIV A6, L.P. ("ASOF Frontier AIV A6"), ASOF Frontier AIV A7, L.P. ("ASOF Frontier AIV A7"), ASOF Frontier AIV A8, L.P. ("ASOF Frontier AIV A8"), ASOF Frontier AIV A9, L.P. ("ASOF Frontier AIV A9"), ASOF Frontier AIV A10, L.P. ("ASOF Frontier AIV A10"), ASOF Frontier AIV A11, L.P. ("ASOF Frontier AIV A11"), (continued in next footnote)

F4 · ownership.nature: and ASOF Frontier AIV B1, L.P. ("ASOF Frontier AIV B1", together with ASOF Frontier AIV A1, ASOF Frontier AIV A2, ASOF Frontier AIV A3, ASOF Frontier AIV A4, ASOF Frontier AIV A5, ASOF Frontier AIV A6, ASOF Frontier AIV A7, ASOF Frontier AIV A8, ASOF Frontier AIV A9, ASOF Frontier AIV A10, and ASOF Frontier AIV A11, the "ASOF Funds"), ASSF IV AIV B Holdings III, L.P. ("ASSF IV AIV B Holdings III"), ASSF IV AIV B, L.P. ("ASSF IV AIV B", and together with ASSF IV AIV B Holdings III, the "ASSF Funds", and together with the ACOF Funds, and the ASOF Funds, the "Ares Direct Holders"), (continued in next footnote)

F5 · ownership.nature: ACOF Investment Management LLC ("ACOF Investment Management"), ASOF Investment Management LLC ("ASOF Investment Management"), ASSF Operating Manager IV, L.P. ("ASSF Operating Manager"), Ares Management LLC, Ares Management Holdings L.P. ("Ares Management Holdings"), Ares Holdco LLC ("Ares Holdco"), Ares Management Corporation ("Ares Management"), Ares Management GP LLC ("Ares Management GP"), Ares Voting LLC ("Ares Voting") and Ares Partners Holdco LLC ("Ares Partners", and together with the Ares Direct Holders, ACOF Investment Management, ASOF Investment Management, ASSF Operating Manager, Ares Management LLC, Ares Management Holdings, Ares Holdco, Ares Management, Ares Management GP, and Ares Voting, the "Reporting Persons"). Due to the electronic system's limitation of 10 Reporting Persons per joint filing, this statement is being filed in four parts.

F6 · ownership.nature: The Reporting Persons collectively beneficially own, or may be deemed to beneficially own, in the aggregate 35,205,125 shares of Common Stock (which aggregate ownership did not change as a result of the Transfers) by reason of the direct or indirect beneficial ownership of such shares as follows: (i) ACOF VI Frontier AIV A1 owns 249,805 shares of Common Stock; (ii) ACOF VI Frontier AIV A2 owns 89,581 shares of Common Stock; (iii) ACOF VI Frontier AIV A3 owns 20,902 shares of Common Stock; (iv) ACOF VI Frontier AIV A4 owns 271,730 shares of Common Stock; (v) ACOF VI Frontier AIV A5 owns 298,604 shares of Common Stock; (vi) ACOF VI Frontier AIV A6 owns 167,219 shares of Common Stock; (vii) ACOF VI Frontier AIV A7 owns 302,616 shares of Common Stock; (viii) ACOF VI Frontier AIV A8 owns shares 303,979 of Common Stock; (continued in next footnote)

F7 · ownership.nature: (ix) ACOF VI Frontier AIV A9 owns 285,466 shares of Common Stock; (x) ACOF VI Frontier AIV A10 owns 90,268 shares of Common Stock; (xi) ACOF VI Frontier AIV B1 owns 15,068,130 shares of Common Stock;(xii) ASOF Frontier AIV A1 owns 105,592 shares of Common Stock; (xiii) ASOF Frontier AIV A2 owns 18,032 shares of Common Stock; (xiv) ASOF Frontier AIV A3 owns 830,837 shares of Common Stock; (xv) ASOF Frontier AIV A4 owns 281,844 shares of Common Stock; (xvi) ASOF Frontier AIV A5 owns 167,160 shares of Common Stock; (xvii) ASOF Frontier AIV A6 owns 292,124 shares of Common Stock; (xviii) ASOF Frontier AIV A7 owns 289,417 shares of Common Stock; (xix) ASOF Frontier AIV A8 owns 238,026 shares of Common Stock; (xx) ASOF Frontier AIV A9 owns 360,644 shares of Common Stock; (xxi) ASOF Frontier AIV A10 owns 259,665 shares of Common Stock; (xxii) ASOF Frontier AIV A11 owns 245,236 shares of Common Stock; (continued in next footnote)

F8 · ownership.nature: (xiii) ASOF Frontier AIV B1 owns 9,597,579 shares of Common Stock; (xxiv) ASSF IV AIV B Holdings III owns 2,694,242 shares of Common Stock; and (xxv) ASSF IV AIV B directly or indirectly owns 2,654,041 shares of Common Stock. Because the aggregate number of shares of Common Stock sold by Ares Direct Holders in the Transfers equals the number of shares of Common Stock purchased by Ares Direct Holders in the Transfers, the total number of shares of Common Stock that Ares Management LLC (as well as ACOF Investment Management, ASOF Investment Management, ASSF Operating Manager, Ares Management Holdings, Ares Holdco, Ares Management Corporation, Ares Management GP, Ares Voting and Ares Partners Holdco), may be deemed to beneficially own did not change as a result of the Transfers.

F9 · ownership.nature: ACOF Investment Management is the manager of the ACOF Funds, ASOF Investment Management is the manager of ASOF Funds, ASSF Operating Manager is the manager of the ASSF Funds. Ares Management LLC is the sole member of ACOF Investment Management and ASOF Investment Management and the general partner of ASSF Operating Manager. Ares Management LLC has direct or indirect power to vote and/or dispose of the shares of Common Stock held by each Ares Direct Holder, and accordingly, Ares Management LLC may be deemed to have beneficial ownership of the shares of Common Stock reported herein. The sole member of Ares Management LLC is Ares Management Holdings and the general partner of Ares Management Holdings is Ares Holdco.

F10 · ownership.nature: The sole member of Ares Holdco is Ares Management. Ares Management GP is the sole holder of the Class B common stock, $0.01 par value per share, of Ares Management (the "Ares Class B Common Stock") and Ares Voting is the sole holder of the Class C common stock, $0.01 par value per share, of Ares Management (the "Ares Class C Common Stock"). (continued in next footnote)

F11 · ownership.nature: Pursuant to Ares Management's Certificate of Incorporation, the holders of the Ares Class B Common Stock and the Ares Class C Common Stock, collectively, will generally have the majority of the votes on any matter submitted to the stockholders of Ares Management if certain conditions are met. The sole member of both Ares Management GP and Ares Voting is Ares Partners. Ares Partners is managed by a board of managers, which is composed of Michael Arougheti, Ryan Berry, R. Kipp deVeer, David Kaplan, Antony Ressler and Bennett Rosenthal (collectively, the "Board Members"). Mr. Ressler generally has veto authority over decisions by the Board Members. (continued in next footnote)

F12 · ownership.nature: Each of the Reporting Persons, and the Board Members, and the other directors, officers, partners, stockholders, members and managers of the Reporting Persons, expressly disclaims beneficial ownership of the Common Stock, except to the extent of any pecuniary interest therein, and this Form 4 shall not be deemed an admission that any such person or entity is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purposes.

SEC source: 0001104659-21-120390 · tm2128492-1_4seq1.xml · nonDerivative · entry 20

ARES MANAGEMENT LLC · CIK 0001259313 · 10% owner

ACOF VI Frontier AIV A1, L.P. · CIK 0001862494 · 10% owner

ACOF VI Frontier AIV A2, L.P. · CIK 0001862499 · 10% owner

ACOF VI Frontier AIV A3, L.P. · CIK 0001862534 · 10% owner

ACOF VI Frontier AIV A4, L.P. · CIK 0001862529 · 10% owner

ACOF VI Frontier AIV A5, L.P. · CIK 0001862526 · 10% owner

ACOF VI Frontier AIV A6, L.P. · CIK 0001862483 · 10% owner

ACOF VI Frontier AIV A7, L.P. · CIK 0001862482 · 10% owner

ACOF VI Frontier AIV A8, L.P. · CIK 0001862505 · 10% owner

ACOF VI Frontier AIV A9, L.P. · CIK 0001862533 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · ACOF VI Frontier AIV A8, L.P.

Disclosed balance after: 303,979

F1 · kind: These transactions reflect inter-fund transfers (the "Transfers") of shares of the Issuer's Common Stock from one Ares Direct Holder (as defined below) to another Ares Direct Holder in connection with an internal rebalancing of such Ares Direct Holders' holdings of Common Stock. Each Transfer occurred at the same time and at the same price.

F2 · balance_after: This statement is being filed by ACOF VI Frontier AIV A1, L.P. ("ACOF VI Frontier AIV A1"), ACOF VI Frontier AIV A2, L.P. ("ACOF VI Frontier AIV A2"), ACOF VI Frontier AIV A3, L.P. ("ACOF VI Frontier AIV A3"), ACOF VI Frontier AIV A4, L.P. ("ACOF VI Frontier AIV A4"), ACOF VI Frontier AIV A5, L.P. ("ACOF VI Frontier AIV A5"), ACOF VI Frontier AIV A6, L.P. ("ACOF VI Frontier AIV A6"), ACOF VI Frontier AIV A7, L.P. ("ACOF VI Frontier AIV A7"), ACOF VI Frontier AIV A8, L.P. ("ACOF VI Frontier AIV A8"), ACOF VI Frontier AIV A9, L.P. ("ACOF VI Frontier AIV A9"), ACOF VI Frontier AIV A10, L.P. ("ACOF VI Frontier AIV A10"), and ACOF VI Frontier AIV B1, L.P. ("ACOF VI Frontier AIV B1", together with the foregoing entities, the "ACOF Funds"), (continued in next footnote)

F3 · balance_after: ASOF Frontier AIV A1, L.P. ("ASOF Frontier AIV A1"), ASOF Frontier AIV A2, L.P. ("ASOF Frontier AIV A2"), ASOF Frontier AIV A3, L.P. ("ASOF Frontier AIV A3"), ASOF Frontier AIV A4, L.P. ("ASOF Frontier AIV A4"), ASOF Frontier AIV A5, L.P. ("ASOF Frontier AIV A5"), ASOF Frontier AIV A6, L.P. ("ASOF Frontier AIV A6"), ASOF Frontier AIV A7, L.P. ("ASOF Frontier AIV A7"), ASOF Frontier AIV A8, L.P. ("ASOF Frontier AIV A8"), ASOF Frontier AIV A9, L.P. ("ASOF Frontier AIV A9"), ASOF Frontier AIV A10, L.P. ("ASOF Frontier AIV A10"), ASOF Frontier AIV A11, L.P. ("ASOF Frontier AIV A11"), (continued in next footnote)

F4 · balance_after: and ASOF Frontier AIV B1, L.P. ("ASOF Frontier AIV B1", together with ASOF Frontier AIV A1, ASOF Frontier AIV A2, ASOF Frontier AIV A3, ASOF Frontier AIV A4, ASOF Frontier AIV A5, ASOF Frontier AIV A6, ASOF Frontier AIV A7, ASOF Frontier AIV A8, ASOF Frontier AIV A9, ASOF Frontier AIV A10, and ASOF Frontier AIV A11, the "ASOF Funds"), ASSF IV AIV B Holdings III, L.P. ("ASSF IV AIV B Holdings III"), ASSF IV AIV B, L.P. ("ASSF IV AIV B", and together with ASSF IV AIV B Holdings III, the "ASSF Funds", and together with the ACOF Funds, and the ASOF Funds, the "Ares Direct Holders"), (continued in next footnote)

F5 · balance_after: ACOF Investment Management LLC ("ACOF Investment Management"), ASOF Investment Management LLC ("ASOF Investment Management"), ASSF Operating Manager IV, L.P. ("ASSF Operating Manager"), Ares Management LLC, Ares Management Holdings L.P. ("Ares Management Holdings"), Ares Holdco LLC ("Ares Holdco"), Ares Management Corporation ("Ares Management"), Ares Management GP LLC ("Ares Management GP"), Ares Voting LLC ("Ares Voting") and Ares Partners Holdco LLC ("Ares Partners", and together with the Ares Direct Holders, ACOF Investment Management, ASOF Investment Management, ASSF Operating Manager, Ares Management LLC, Ares Management Holdings, Ares Holdco, Ares Management, Ares Management GP, and Ares Voting, the "Reporting Persons"). Due to the electronic system's limitation of 10 Reporting Persons per joint filing, this statement is being filed in four parts.

F6 · balance_after: The Reporting Persons collectively beneficially own, or may be deemed to beneficially own, in the aggregate 35,205,125 shares of Common Stock (which aggregate ownership did not change as a result of the Transfers) by reason of the direct or indirect beneficial ownership of such shares as follows: (i) ACOF VI Frontier AIV A1 owns 249,805 shares of Common Stock; (ii) ACOF VI Frontier AIV A2 owns 89,581 shares of Common Stock; (iii) ACOF VI Frontier AIV A3 owns 20,902 shares of Common Stock; (iv) ACOF VI Frontier AIV A4 owns 271,730 shares of Common Stock; (v) ACOF VI Frontier AIV A5 owns 298,604 shares of Common Stock; (vi) ACOF VI Frontier AIV A6 owns 167,219 shares of Common Stock; (vii) ACOF VI Frontier AIV A7 owns 302,616 shares of Common Stock; (viii) ACOF VI Frontier AIV A8 owns shares 303,979 of Common Stock; (continued in next footnote)

F7 · balance_after: (ix) ACOF VI Frontier AIV A9 owns 285,466 shares of Common Stock; (x) ACOF VI Frontier AIV A10 owns 90,268 shares of Common Stock; (xi) ACOF VI Frontier AIV B1 owns 15,068,130 shares of Common Stock;(xii) ASOF Frontier AIV A1 owns 105,592 shares of Common Stock; (xiii) ASOF Frontier AIV A2 owns 18,032 shares of Common Stock; (xiv) ASOF Frontier AIV A3 owns 830,837 shares of Common Stock; (xv) ASOF Frontier AIV A4 owns 281,844 shares of Common Stock; (xvi) ASOF Frontier AIV A5 owns 167,160 shares of Common Stock; (xvii) ASOF Frontier AIV A6 owns 292,124 shares of Common Stock; (xviii) ASOF Frontier AIV A7 owns 289,417 shares of Common Stock; (xix) ASOF Frontier AIV A8 owns 238,026 shares of Common Stock; (xx) ASOF Frontier AIV A9 owns 360,644 shares of Common Stock; (xxi) ASOF Frontier AIV A10 owns 259,665 shares of Common Stock; (xxii) ASOF Frontier AIV A11 owns 245,236 shares of Common Stock; (continued in next footnote)

F8 · balance_after: (xiii) ASOF Frontier AIV B1 owns 9,597,579 shares of Common Stock; (xxiv) ASSF IV AIV B Holdings III owns 2,694,242 shares of Common Stock; and (xxv) ASSF IV AIV B directly or indirectly owns 2,654,041 shares of Common Stock. Because the aggregate number of shares of Common Stock sold by Ares Direct Holders in the Transfers equals the number of shares of Common Stock purchased by Ares Direct Holders in the Transfers, the total number of shares of Common Stock that Ares Management LLC (as well as ACOF Investment Management, ASOF Investment Management, ASSF Operating Manager, Ares Management Holdings, Ares Holdco, Ares Management Corporation, Ares Management GP, Ares Voting and Ares Partners Holdco), may be deemed to beneficially own did not change as a result of the Transfers.

F9 · balance_after: ACOF Investment Management is the manager of the ACOF Funds, ASOF Investment Management is the manager of ASOF Funds, ASSF Operating Manager is the manager of the ASSF Funds. Ares Management LLC is the sole member of ACOF Investment Management and ASOF Investment Management and the general partner of ASSF Operating Manager. Ares Management LLC has direct or indirect power to vote and/or dispose of the shares of Common Stock held by each Ares Direct Holder, and accordingly, Ares Management LLC may be deemed to have beneficial ownership of the shares of Common Stock reported herein. The sole member of Ares Management LLC is Ares Management Holdings and the general partner of Ares Management Holdings is Ares Holdco.

F10 · balance_after: The sole member of Ares Holdco is Ares Management. Ares Management GP is the sole holder of the Class B common stock, $0.01 par value per share, of Ares Management (the "Ares Class B Common Stock") and Ares Voting is the sole holder of the Class C common stock, $0.01 par value per share, of Ares Management (the "Ares Class C Common Stock"). (continued in next footnote)

F11 · balance_after: Pursuant to Ares Management's Certificate of Incorporation, the holders of the Ares Class B Common Stock and the Ares Class C Common Stock, collectively, will generally have the majority of the votes on any matter submitted to the stockholders of Ares Management if certain conditions are met. The sole member of both Ares Management GP and Ares Voting is Ares Partners. Ares Partners is managed by a board of managers, which is composed of Michael Arougheti, Ryan Berry, R. Kipp deVeer, David Kaplan, Antony Ressler and Bennett Rosenthal (collectively, the "Board Members"). Mr. Ressler generally has veto authority over decisions by the Board Members. (continued in next footnote)

F12 · balance_after: Each of the Reporting Persons, and the Board Members, and the other directors, officers, partners, stockholders, members and managers of the Reporting Persons, expressly disclaims beneficial ownership of the Common Stock, except to the extent of any pecuniary interest therein, and this Form 4 shall not be deemed an admission that any such person or entity is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purposes.

F2 · ownership.nature: This statement is being filed by ACOF VI Frontier AIV A1, L.P. ("ACOF VI Frontier AIV A1"), ACOF VI Frontier AIV A2, L.P. ("ACOF VI Frontier AIV A2"), ACOF VI Frontier AIV A3, L.P. ("ACOF VI Frontier AIV A3"), ACOF VI Frontier AIV A4, L.P. ("ACOF VI Frontier AIV A4"), ACOF VI Frontier AIV A5, L.P. ("ACOF VI Frontier AIV A5"), ACOF VI Frontier AIV A6, L.P. ("ACOF VI Frontier AIV A6"), ACOF VI Frontier AIV A7, L.P. ("ACOF VI Frontier AIV A7"), ACOF VI Frontier AIV A8, L.P. ("ACOF VI Frontier AIV A8"), ACOF VI Frontier AIV A9, L.P. ("ACOF VI Frontier AIV A9"), ACOF VI Frontier AIV A10, L.P. ("ACOF VI Frontier AIV A10"), and ACOF VI Frontier AIV B1, L.P. ("ACOF VI Frontier AIV B1", together with the foregoing entities, the "ACOF Funds"), (continued in next footnote)

F3 · ownership.nature: ASOF Frontier AIV A1, L.P. ("ASOF Frontier AIV A1"), ASOF Frontier AIV A2, L.P. ("ASOF Frontier AIV A2"), ASOF Frontier AIV A3, L.P. ("ASOF Frontier AIV A3"), ASOF Frontier AIV A4, L.P. ("ASOF Frontier AIV A4"), ASOF Frontier AIV A5, L.P. ("ASOF Frontier AIV A5"), ASOF Frontier AIV A6, L.P. ("ASOF Frontier AIV A6"), ASOF Frontier AIV A7, L.P. ("ASOF Frontier AIV A7"), ASOF Frontier AIV A8, L.P. ("ASOF Frontier AIV A8"), ASOF Frontier AIV A9, L.P. ("ASOF Frontier AIV A9"), ASOF Frontier AIV A10, L.P. ("ASOF Frontier AIV A10"), ASOF Frontier AIV A11, L.P. ("ASOF Frontier AIV A11"), (continued in next footnote)

F4 · ownership.nature: and ASOF Frontier AIV B1, L.P. ("ASOF Frontier AIV B1", together with ASOF Frontier AIV A1, ASOF Frontier AIV A2, ASOF Frontier AIV A3, ASOF Frontier AIV A4, ASOF Frontier AIV A5, ASOF Frontier AIV A6, ASOF Frontier AIV A7, ASOF Frontier AIV A8, ASOF Frontier AIV A9, ASOF Frontier AIV A10, and ASOF Frontier AIV A11, the "ASOF Funds"), ASSF IV AIV B Holdings III, L.P. ("ASSF IV AIV B Holdings III"), ASSF IV AIV B, L.P. ("ASSF IV AIV B", and together with ASSF IV AIV B Holdings III, the "ASSF Funds", and together with the ACOF Funds, and the ASOF Funds, the "Ares Direct Holders"), (continued in next footnote)

F5 · ownership.nature: ACOF Investment Management LLC ("ACOF Investment Management"), ASOF Investment Management LLC ("ASOF Investment Management"), ASSF Operating Manager IV, L.P. ("ASSF Operating Manager"), Ares Management LLC, Ares Management Holdings L.P. ("Ares Management Holdings"), Ares Holdco LLC ("Ares Holdco"), Ares Management Corporation ("Ares Management"), Ares Management GP LLC ("Ares Management GP"), Ares Voting LLC ("Ares Voting") and Ares Partners Holdco LLC ("Ares Partners", and together with the Ares Direct Holders, ACOF Investment Management, ASOF Investment Management, ASSF Operating Manager, Ares Management LLC, Ares Management Holdings, Ares Holdco, Ares Management, Ares Management GP, and Ares Voting, the "Reporting Persons"). Due to the electronic system's limitation of 10 Reporting Persons per joint filing, this statement is being filed in four parts.

F6 · ownership.nature: The Reporting Persons collectively beneficially own, or may be deemed to beneficially own, in the aggregate 35,205,125 shares of Common Stock (which aggregate ownership did not change as a result of the Transfers) by reason of the direct or indirect beneficial ownership of such shares as follows: (i) ACOF VI Frontier AIV A1 owns 249,805 shares of Common Stock; (ii) ACOF VI Frontier AIV A2 owns 89,581 shares of Common Stock; (iii) ACOF VI Frontier AIV A3 owns 20,902 shares of Common Stock; (iv) ACOF VI Frontier AIV A4 owns 271,730 shares of Common Stock; (v) ACOF VI Frontier AIV A5 owns 298,604 shares of Common Stock; (vi) ACOF VI Frontier AIV A6 owns 167,219 shares of Common Stock; (vii) ACOF VI Frontier AIV A7 owns 302,616 shares of Common Stock; (viii) ACOF VI Frontier AIV A8 owns shares 303,979 of Common Stock; (continued in next footnote)

F7 · ownership.nature: (ix) ACOF VI Frontier AIV A9 owns 285,466 shares of Common Stock; (x) ACOF VI Frontier AIV A10 owns 90,268 shares of Common Stock; (xi) ACOF VI Frontier AIV B1 owns 15,068,130 shares of Common Stock;(xii) ASOF Frontier AIV A1 owns 105,592 shares of Common Stock; (xiii) ASOF Frontier AIV A2 owns 18,032 shares of Common Stock; (xiv) ASOF Frontier AIV A3 owns 830,837 shares of Common Stock; (xv) ASOF Frontier AIV A4 owns 281,844 shares of Common Stock; (xvi) ASOF Frontier AIV A5 owns 167,160 shares of Common Stock; (xvii) ASOF Frontier AIV A6 owns 292,124 shares of Common Stock; (xviii) ASOF Frontier AIV A7 owns 289,417 shares of Common Stock; (xix) ASOF Frontier AIV A8 owns 238,026 shares of Common Stock; (xx) ASOF Frontier AIV A9 owns 360,644 shares of Common Stock; (xxi) ASOF Frontier AIV A10 owns 259,665 shares of Common Stock; (xxii) ASOF Frontier AIV A11 owns 245,236 shares of Common Stock; (continued in next footnote)

F8 · ownership.nature: (xiii) ASOF Frontier AIV B1 owns 9,597,579 shares of Common Stock; (xxiv) ASSF IV AIV B Holdings III owns 2,694,242 shares of Common Stock; and (xxv) ASSF IV AIV B directly or indirectly owns 2,654,041 shares of Common Stock. Because the aggregate number of shares of Common Stock sold by Ares Direct Holders in the Transfers equals the number of shares of Common Stock purchased by Ares Direct Holders in the Transfers, the total number of shares of Common Stock that Ares Management LLC (as well as ACOF Investment Management, ASOF Investment Management, ASSF Operating Manager, Ares Management Holdings, Ares Holdco, Ares Management Corporation, Ares Management GP, Ares Voting and Ares Partners Holdco), may be deemed to beneficially own did not change as a result of the Transfers.

F9 · ownership.nature: ACOF Investment Management is the manager of the ACOF Funds, ASOF Investment Management is the manager of ASOF Funds, ASSF Operating Manager is the manager of the ASSF Funds. Ares Management LLC is the sole member of ACOF Investment Management and ASOF Investment Management and the general partner of ASSF Operating Manager. Ares Management LLC has direct or indirect power to vote and/or dispose of the shares of Common Stock held by each Ares Direct Holder, and accordingly, Ares Management LLC may be deemed to have beneficial ownership of the shares of Common Stock reported herein. The sole member of Ares Management LLC is Ares Management Holdings and the general partner of Ares Management Holdings is Ares Holdco.

F10 · ownership.nature: The sole member of Ares Holdco is Ares Management. Ares Management GP is the sole holder of the Class B common stock, $0.01 par value per share, of Ares Management (the "Ares Class B Common Stock") and Ares Voting is the sole holder of the Class C common stock, $0.01 par value per share, of Ares Management (the "Ares Class C Common Stock"). (continued in next footnote)

F11 · ownership.nature: Pursuant to Ares Management's Certificate of Incorporation, the holders of the Ares Class B Common Stock and the Ares Class C Common Stock, collectively, will generally have the majority of the votes on any matter submitted to the stockholders of Ares Management if certain conditions are met. The sole member of both Ares Management GP and Ares Voting is Ares Partners. Ares Partners is managed by a board of managers, which is composed of Michael Arougheti, Ryan Berry, R. Kipp deVeer, David Kaplan, Antony Ressler and Bennett Rosenthal (collectively, the "Board Members"). Mr. Ressler generally has veto authority over decisions by the Board Members. (continued in next footnote)

F12 · ownership.nature: Each of the Reporting Persons, and the Board Members, and the other directors, officers, partners, stockholders, members and managers of the Reporting Persons, expressly disclaims beneficial ownership of the Common Stock, except to the extent of any pecuniary interest therein, and this Form 4 shall not be deemed an admission that any such person or entity is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purposes.

SEC source: 0001104659-21-120390 · tm2128492-1_4seq1.xml · nonDerivative · entry 19

ARES MANAGEMENT LLC · CIK 0001259313 · 10% owner

ACOF VI Frontier AIV A1, L.P. · CIK 0001862494 · 10% owner

ACOF VI Frontier AIV A2, L.P. · CIK 0001862499 · 10% owner

ACOF VI Frontier AIV A3, L.P. · CIK 0001862534 · 10% owner

ACOF VI Frontier AIV A4, L.P. · CIK 0001862529 · 10% owner

ACOF VI Frontier AIV A5, L.P. · CIK 0001862526 · 10% owner

ACOF VI Frontier AIV A6, L.P. · CIK 0001862483 · 10% owner

ACOF VI Frontier AIV A7, L.P. · CIK 0001862482 · 10% owner

ACOF VI Frontier AIV A8, L.P. · CIK 0001862505 · 10% owner

ACOF VI Frontier AIV A9, L.P. · CIK 0001862533 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · ACOF VI Frontier AIV A7, L.P.

Disclosed balance after: 302,616

F1 · kind: These transactions reflect inter-fund transfers (the "Transfers") of shares of the Issuer's Common Stock from one Ares Direct Holder (as defined below) to another Ares Direct Holder in connection with an internal rebalancing of such Ares Direct Holders' holdings of Common Stock. Each Transfer occurred at the same time and at the same price.

F2 · balance_after: This statement is being filed by ACOF VI Frontier AIV A1, L.P. ("ACOF VI Frontier AIV A1"), ACOF VI Frontier AIV A2, L.P. ("ACOF VI Frontier AIV A2"), ACOF VI Frontier AIV A3, L.P. ("ACOF VI Frontier AIV A3"), ACOF VI Frontier AIV A4, L.P. ("ACOF VI Frontier AIV A4"), ACOF VI Frontier AIV A5, L.P. ("ACOF VI Frontier AIV A5"), ACOF VI Frontier AIV A6, L.P. ("ACOF VI Frontier AIV A6"), ACOF VI Frontier AIV A7, L.P. ("ACOF VI Frontier AIV A7"), ACOF VI Frontier AIV A8, L.P. ("ACOF VI Frontier AIV A8"), ACOF VI Frontier AIV A9, L.P. ("ACOF VI Frontier AIV A9"), ACOF VI Frontier AIV A10, L.P. ("ACOF VI Frontier AIV A10"), and ACOF VI Frontier AIV B1, L.P. ("ACOF VI Frontier AIV B1", together with the foregoing entities, the "ACOF Funds"), (continued in next footnote)

F3 · balance_after: ASOF Frontier AIV A1, L.P. ("ASOF Frontier AIV A1"), ASOF Frontier AIV A2, L.P. ("ASOF Frontier AIV A2"), ASOF Frontier AIV A3, L.P. ("ASOF Frontier AIV A3"), ASOF Frontier AIV A4, L.P. ("ASOF Frontier AIV A4"), ASOF Frontier AIV A5, L.P. ("ASOF Frontier AIV A5"), ASOF Frontier AIV A6, L.P. ("ASOF Frontier AIV A6"), ASOF Frontier AIV A7, L.P. ("ASOF Frontier AIV A7"), ASOF Frontier AIV A8, L.P. ("ASOF Frontier AIV A8"), ASOF Frontier AIV A9, L.P. ("ASOF Frontier AIV A9"), ASOF Frontier AIV A10, L.P. ("ASOF Frontier AIV A10"), ASOF Frontier AIV A11, L.P. ("ASOF Frontier AIV A11"), (continued in next footnote)

F4 · balance_after: and ASOF Frontier AIV B1, L.P. ("ASOF Frontier AIV B1", together with ASOF Frontier AIV A1, ASOF Frontier AIV A2, ASOF Frontier AIV A3, ASOF Frontier AIV A4, ASOF Frontier AIV A5, ASOF Frontier AIV A6, ASOF Frontier AIV A7, ASOF Frontier AIV A8, ASOF Frontier AIV A9, ASOF Frontier AIV A10, and ASOF Frontier AIV A11, the "ASOF Funds"), ASSF IV AIV B Holdings III, L.P. ("ASSF IV AIV B Holdings III"), ASSF IV AIV B, L.P. ("ASSF IV AIV B", and together with ASSF IV AIV B Holdings III, the "ASSF Funds", and together with the ACOF Funds, and the ASOF Funds, the "Ares Direct Holders"), (continued in next footnote)

F5 · balance_after: ACOF Investment Management LLC ("ACOF Investment Management"), ASOF Investment Management LLC ("ASOF Investment Management"), ASSF Operating Manager IV, L.P. ("ASSF Operating Manager"), Ares Management LLC, Ares Management Holdings L.P. ("Ares Management Holdings"), Ares Holdco LLC ("Ares Holdco"), Ares Management Corporation ("Ares Management"), Ares Management GP LLC ("Ares Management GP"), Ares Voting LLC ("Ares Voting") and Ares Partners Holdco LLC ("Ares Partners", and together with the Ares Direct Holders, ACOF Investment Management, ASOF Investment Management, ASSF Operating Manager, Ares Management LLC, Ares Management Holdings, Ares Holdco, Ares Management, Ares Management GP, and Ares Voting, the "Reporting Persons"). Due to the electronic system's limitation of 10 Reporting Persons per joint filing, this statement is being filed in four parts.

F6 · balance_after: The Reporting Persons collectively beneficially own, or may be deemed to beneficially own, in the aggregate 35,205,125 shares of Common Stock (which aggregate ownership did not change as a result of the Transfers) by reason of the direct or indirect beneficial ownership of such shares as follows: (i) ACOF VI Frontier AIV A1 owns 249,805 shares of Common Stock; (ii) ACOF VI Frontier AIV A2 owns 89,581 shares of Common Stock; (iii) ACOF VI Frontier AIV A3 owns 20,902 shares of Common Stock; (iv) ACOF VI Frontier AIV A4 owns 271,730 shares of Common Stock; (v) ACOF VI Frontier AIV A5 owns 298,604 shares of Common Stock; (vi) ACOF VI Frontier AIV A6 owns 167,219 shares of Common Stock; (vii) ACOF VI Frontier AIV A7 owns 302,616 shares of Common Stock; (viii) ACOF VI Frontier AIV A8 owns shares 303,979 of Common Stock; (continued in next footnote)

F7 · balance_after: (ix) ACOF VI Frontier AIV A9 owns 285,466 shares of Common Stock; (x) ACOF VI Frontier AIV A10 owns 90,268 shares of Common Stock; (xi) ACOF VI Frontier AIV B1 owns 15,068,130 shares of Common Stock;(xii) ASOF Frontier AIV A1 owns 105,592 shares of Common Stock; (xiii) ASOF Frontier AIV A2 owns 18,032 shares of Common Stock; (xiv) ASOF Frontier AIV A3 owns 830,837 shares of Common Stock; (xv) ASOF Frontier AIV A4 owns 281,844 shares of Common Stock; (xvi) ASOF Frontier AIV A5 owns 167,160 shares of Common Stock; (xvii) ASOF Frontier AIV A6 owns 292,124 shares of Common Stock; (xviii) ASOF Frontier AIV A7 owns 289,417 shares of Common Stock; (xix) ASOF Frontier AIV A8 owns 238,026 shares of Common Stock; (xx) ASOF Frontier AIV A9 owns 360,644 shares of Common Stock; (xxi) ASOF Frontier AIV A10 owns 259,665 shares of Common Stock; (xxii) ASOF Frontier AIV A11 owns 245,236 shares of Common Stock; (continued in next footnote)

F8 · balance_after: (xiii) ASOF Frontier AIV B1 owns 9,597,579 shares of Common Stock; (xxiv) ASSF IV AIV B Holdings III owns 2,694,242 shares of Common Stock; and (xxv) ASSF IV AIV B directly or indirectly owns 2,654,041 shares of Common Stock. Because the aggregate number of shares of Common Stock sold by Ares Direct Holders in the Transfers equals the number of shares of Common Stock purchased by Ares Direct Holders in the Transfers, the total number of shares of Common Stock that Ares Management LLC (as well as ACOF Investment Management, ASOF Investment Management, ASSF Operating Manager, Ares Management Holdings, Ares Holdco, Ares Management Corporation, Ares Management GP, Ares Voting and Ares Partners Holdco), may be deemed to beneficially own did not change as a result of the Transfers.

F9 · balance_after: ACOF Investment Management is the manager of the ACOF Funds, ASOF Investment Management is the manager of ASOF Funds, ASSF Operating Manager is the manager of the ASSF Funds. Ares Management LLC is the sole member of ACOF Investment Management and ASOF Investment Management and the general partner of ASSF Operating Manager. Ares Management LLC has direct or indirect power to vote and/or dispose of the shares of Common Stock held by each Ares Direct Holder, and accordingly, Ares Management LLC may be deemed to have beneficial ownership of the shares of Common Stock reported herein. The sole member of Ares Management LLC is Ares Management Holdings and the general partner of Ares Management Holdings is Ares Holdco.

F10 · balance_after: The sole member of Ares Holdco is Ares Management. Ares Management GP is the sole holder of the Class B common stock, $0.01 par value per share, of Ares Management (the "Ares Class B Common Stock") and Ares Voting is the sole holder of the Class C common stock, $0.01 par value per share, of Ares Management (the "Ares Class C Common Stock"). (continued in next footnote)

F11 · balance_after: Pursuant to Ares Management's Certificate of Incorporation, the holders of the Ares Class B Common Stock and the Ares Class C Common Stock, collectively, will generally have the majority of the votes on any matter submitted to the stockholders of Ares Management if certain conditions are met. The sole member of both Ares Management GP and Ares Voting is Ares Partners. Ares Partners is managed by a board of managers, which is composed of Michael Arougheti, Ryan Berry, R. Kipp deVeer, David Kaplan, Antony Ressler and Bennett Rosenthal (collectively, the "Board Members"). Mr. Ressler generally has veto authority over decisions by the Board Members. (continued in next footnote)

F12 · balance_after: Each of the Reporting Persons, and the Board Members, and the other directors, officers, partners, stockholders, members and managers of the Reporting Persons, expressly disclaims beneficial ownership of the Common Stock, except to the extent of any pecuniary interest therein, and this Form 4 shall not be deemed an admission that any such person or entity is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purposes.

F2 · ownership.nature: This statement is being filed by ACOF VI Frontier AIV A1, L.P. ("ACOF VI Frontier AIV A1"), ACOF VI Frontier AIV A2, L.P. ("ACOF VI Frontier AIV A2"), ACOF VI Frontier AIV A3, L.P. ("ACOF VI Frontier AIV A3"), ACOF VI Frontier AIV A4, L.P. ("ACOF VI Frontier AIV A4"), ACOF VI Frontier AIV A5, L.P. ("ACOF VI Frontier AIV A5"), ACOF VI Frontier AIV A6, L.P. ("ACOF VI Frontier AIV A6"), ACOF VI Frontier AIV A7, L.P. ("ACOF VI Frontier AIV A7"), ACOF VI Frontier AIV A8, L.P. ("ACOF VI Frontier AIV A8"), ACOF VI Frontier AIV A9, L.P. ("ACOF VI Frontier AIV A9"), ACOF VI Frontier AIV A10, L.P. ("ACOF VI Frontier AIV A10"), and ACOF VI Frontier AIV B1, L.P. ("ACOF VI Frontier AIV B1", together with the foregoing entities, the "ACOF Funds"), (continued in next footnote)

F3 · ownership.nature: ASOF Frontier AIV A1, L.P. ("ASOF Frontier AIV A1"), ASOF Frontier AIV A2, L.P. ("ASOF Frontier AIV A2"), ASOF Frontier AIV A3, L.P. ("ASOF Frontier AIV A3"), ASOF Frontier AIV A4, L.P. ("ASOF Frontier AIV A4"), ASOF Frontier AIV A5, L.P. ("ASOF Frontier AIV A5"), ASOF Frontier AIV A6, L.P. ("ASOF Frontier AIV A6"), ASOF Frontier AIV A7, L.P. ("ASOF Frontier AIV A7"), ASOF Frontier AIV A8, L.P. ("ASOF Frontier AIV A8"), ASOF Frontier AIV A9, L.P. ("ASOF Frontier AIV A9"), ASOF Frontier AIV A10, L.P. ("ASOF Frontier AIV A10"), ASOF Frontier AIV A11, L.P. ("ASOF Frontier AIV A11"), (continued in next footnote)

F4 · ownership.nature: and ASOF Frontier AIV B1, L.P. ("ASOF Frontier AIV B1", together with ASOF Frontier AIV A1, ASOF Frontier AIV A2, ASOF Frontier AIV A3, ASOF Frontier AIV A4, ASOF Frontier AIV A5, ASOF Frontier AIV A6, ASOF Frontier AIV A7, ASOF Frontier AIV A8, ASOF Frontier AIV A9, ASOF Frontier AIV A10, and ASOF Frontier AIV A11, the "ASOF Funds"), ASSF IV AIV B Holdings III, L.P. ("ASSF IV AIV B Holdings III"), ASSF IV AIV B, L.P. ("ASSF IV AIV B", and together with ASSF IV AIV B Holdings III, the "ASSF Funds", and together with the ACOF Funds, and the ASOF Funds, the "Ares Direct Holders"), (continued in next footnote)

F5 · ownership.nature: ACOF Investment Management LLC ("ACOF Investment Management"), ASOF Investment Management LLC ("ASOF Investment Management"), ASSF Operating Manager IV, L.P. ("ASSF Operating Manager"), Ares Management LLC, Ares Management Holdings L.P. ("Ares Management Holdings"), Ares Holdco LLC ("Ares Holdco"), Ares Management Corporation ("Ares Management"), Ares Management GP LLC ("Ares Management GP"), Ares Voting LLC ("Ares Voting") and Ares Partners Holdco LLC ("Ares Partners", and together with the Ares Direct Holders, ACOF Investment Management, ASOF Investment Management, ASSF Operating Manager, Ares Management LLC, Ares Management Holdings, Ares Holdco, Ares Management, Ares Management GP, and Ares Voting, the "Reporting Persons"). Due to the electronic system's limitation of 10 Reporting Persons per joint filing, this statement is being filed in four parts.

F6 · ownership.nature: The Reporting Persons collectively beneficially own, or may be deemed to beneficially own, in the aggregate 35,205,125 shares of Common Stock (which aggregate ownership did not change as a result of the Transfers) by reason of the direct or indirect beneficial ownership of such shares as follows: (i) ACOF VI Frontier AIV A1 owns 249,805 shares of Common Stock; (ii) ACOF VI Frontier AIV A2 owns 89,581 shares of Common Stock; (iii) ACOF VI Frontier AIV A3 owns 20,902 shares of Common Stock; (iv) ACOF VI Frontier AIV A4 owns 271,730 shares of Common Stock; (v) ACOF VI Frontier AIV A5 owns 298,604 shares of Common Stock; (vi) ACOF VI Frontier AIV A6 owns 167,219 shares of Common Stock; (vii) ACOF VI Frontier AIV A7 owns 302,616 shares of Common Stock; (viii) ACOF VI Frontier AIV A8 owns shares 303,979 of Common Stock; (continued in next footnote)

F7 · ownership.nature: (ix) ACOF VI Frontier AIV A9 owns 285,466 shares of Common Stock; (x) ACOF VI Frontier AIV A10 owns 90,268 shares of Common Stock; (xi) ACOF VI Frontier AIV B1 owns 15,068,130 shares of Common Stock;(xii) ASOF Frontier AIV A1 owns 105,592 shares of Common Stock; (xiii) ASOF Frontier AIV A2 owns 18,032 shares of Common Stock; (xiv) ASOF Frontier AIV A3 owns 830,837 shares of Common Stock; (xv) ASOF Frontier AIV A4 owns 281,844 shares of Common Stock; (xvi) ASOF Frontier AIV A5 owns 167,160 shares of Common Stock; (xvii) ASOF Frontier AIV A6 owns 292,124 shares of Common Stock; (xviii) ASOF Frontier AIV A7 owns 289,417 shares of Common Stock; (xix) ASOF Frontier AIV A8 owns 238,026 shares of Common Stock; (xx) ASOF Frontier AIV A9 owns 360,644 shares of Common Stock; (xxi) ASOF Frontier AIV A10 owns 259,665 shares of Common Stock; (xxii) ASOF Frontier AIV A11 owns 245,236 shares of Common Stock; (continued in next footnote)

F8 · ownership.nature: (xiii) ASOF Frontier AIV B1 owns 9,597,579 shares of Common Stock; (xxiv) ASSF IV AIV B Holdings III owns 2,694,242 shares of Common Stock; and (xxv) ASSF IV AIV B directly or indirectly owns 2,654,041 shares of Common Stock. Because the aggregate number of shares of Common Stock sold by Ares Direct Holders in the Transfers equals the number of shares of Common Stock purchased by Ares Direct Holders in the Transfers, the total number of shares of Common Stock that Ares Management LLC (as well as ACOF Investment Management, ASOF Investment Management, ASSF Operating Manager, Ares Management Holdings, Ares Holdco, Ares Management Corporation, Ares Management GP, Ares Voting and Ares Partners Holdco), may be deemed to beneficially own did not change as a result of the Transfers.

F9 · ownership.nature: ACOF Investment Management is the manager of the ACOF Funds, ASOF Investment Management is the manager of ASOF Funds, ASSF Operating Manager is the manager of the ASSF Funds. Ares Management LLC is the sole member of ACOF Investment Management and ASOF Investment Management and the general partner of ASSF Operating Manager. Ares Management LLC has direct or indirect power to vote and/or dispose of the shares of Common Stock held by each Ares Direct Holder, and accordingly, Ares Management LLC may be deemed to have beneficial ownership of the shares of Common Stock reported herein. The sole member of Ares Management LLC is Ares Management Holdings and the general partner of Ares Management Holdings is Ares Holdco.

F10 · ownership.nature: The sole member of Ares Holdco is Ares Management. Ares Management GP is the sole holder of the Class B common stock, $0.01 par value per share, of Ares Management (the "Ares Class B Common Stock") and Ares Voting is the sole holder of the Class C common stock, $0.01 par value per share, of Ares Management (the "Ares Class C Common Stock"). (continued in next footnote)

F11 · ownership.nature: Pursuant to Ares Management's Certificate of Incorporation, the holders of the Ares Class B Common Stock and the Ares Class C Common Stock, collectively, will generally have the majority of the votes on any matter submitted to the stockholders of Ares Management if certain conditions are met. The sole member of both Ares Management GP and Ares Voting is Ares Partners. Ares Partners is managed by a board of managers, which is composed of Michael Arougheti, Ryan Berry, R. Kipp deVeer, David Kaplan, Antony Ressler and Bennett Rosenthal (collectively, the "Board Members"). Mr. Ressler generally has veto authority over decisions by the Board Members. (continued in next footnote)

F12 · ownership.nature: Each of the Reporting Persons, and the Board Members, and the other directors, officers, partners, stockholders, members and managers of the Reporting Persons, expressly disclaims beneficial ownership of the Common Stock, except to the extent of any pecuniary interest therein, and this Form 4 shall not be deemed an admission that any such person or entity is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purposes.

SEC source: 0001104659-21-120390 · tm2128492-1_4seq1.xml · nonDerivative · entry 18

ARES MANAGEMENT LLC · CIK 0001259313 · 10% owner

ACOF VI Frontier AIV A1, L.P. · CIK 0001862494 · 10% owner

ACOF VI Frontier AIV A2, L.P. · CIK 0001862499 · 10% owner

ACOF VI Frontier AIV A3, L.P. · CIK 0001862534 · 10% owner

ACOF VI Frontier AIV A4, L.P. · CIK 0001862529 · 10% owner

ACOF VI Frontier AIV A5, L.P. · CIK 0001862526 · 10% owner

ACOF VI Frontier AIV A6, L.P. · CIK 0001862483 · 10% owner

ACOF VI Frontier AIV A7, L.P. · CIK 0001862482 · 10% owner

ACOF VI Frontier AIV A8, L.P. · CIK 0001862505 · 10% owner

ACOF VI Frontier AIV A9, L.P. · CIK 0001862533 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · ACOF VI Frontier AIV A6, L.P.

Disclosed balance after: 167,219

F1 · kind: These transactions reflect inter-fund transfers (the "Transfers") of shares of the Issuer's Common Stock from one Ares Direct Holder (as defined below) to another Ares Direct Holder in connection with an internal rebalancing of such Ares Direct Holders' holdings of Common Stock. Each Transfer occurred at the same time and at the same price.

F2 · balance_after: This statement is being filed by ACOF VI Frontier AIV A1, L.P. ("ACOF VI Frontier AIV A1"), ACOF VI Frontier AIV A2, L.P. ("ACOF VI Frontier AIV A2"), ACOF VI Frontier AIV A3, L.P. ("ACOF VI Frontier AIV A3"), ACOF VI Frontier AIV A4, L.P. ("ACOF VI Frontier AIV A4"), ACOF VI Frontier AIV A5, L.P. ("ACOF VI Frontier AIV A5"), ACOF VI Frontier AIV A6, L.P. ("ACOF VI Frontier AIV A6"), ACOF VI Frontier AIV A7, L.P. ("ACOF VI Frontier AIV A7"), ACOF VI Frontier AIV A8, L.P. ("ACOF VI Frontier AIV A8"), ACOF VI Frontier AIV A9, L.P. ("ACOF VI Frontier AIV A9"), ACOF VI Frontier AIV A10, L.P. ("ACOF VI Frontier AIV A10"), and ACOF VI Frontier AIV B1, L.P. ("ACOF VI Frontier AIV B1", together with the foregoing entities, the "ACOF Funds"), (continued in next footnote)

F3 · balance_after: ASOF Frontier AIV A1, L.P. ("ASOF Frontier AIV A1"), ASOF Frontier AIV A2, L.P. ("ASOF Frontier AIV A2"), ASOF Frontier AIV A3, L.P. ("ASOF Frontier AIV A3"), ASOF Frontier AIV A4, L.P. ("ASOF Frontier AIV A4"), ASOF Frontier AIV A5, L.P. ("ASOF Frontier AIV A5"), ASOF Frontier AIV A6, L.P. ("ASOF Frontier AIV A6"), ASOF Frontier AIV A7, L.P. ("ASOF Frontier AIV A7"), ASOF Frontier AIV A8, L.P. ("ASOF Frontier AIV A8"), ASOF Frontier AIV A9, L.P. ("ASOF Frontier AIV A9"), ASOF Frontier AIV A10, L.P. ("ASOF Frontier AIV A10"), ASOF Frontier AIV A11, L.P. ("ASOF Frontier AIV A11"), (continued in next footnote)

F4 · balance_after: and ASOF Frontier AIV B1, L.P. ("ASOF Frontier AIV B1", together with ASOF Frontier AIV A1, ASOF Frontier AIV A2, ASOF Frontier AIV A3, ASOF Frontier AIV A4, ASOF Frontier AIV A5, ASOF Frontier AIV A6, ASOF Frontier AIV A7, ASOF Frontier AIV A8, ASOF Frontier AIV A9, ASOF Frontier AIV A10, and ASOF Frontier AIV A11, the "ASOF Funds"), ASSF IV AIV B Holdings III, L.P. ("ASSF IV AIV B Holdings III"), ASSF IV AIV B, L.P. ("ASSF IV AIV B", and together with ASSF IV AIV B Holdings III, the "ASSF Funds", and together with the ACOF Funds, and the ASOF Funds, the "Ares Direct Holders"), (continued in next footnote)

F5 · balance_after: ACOF Investment Management LLC ("ACOF Investment Management"), ASOF Investment Management LLC ("ASOF Investment Management"), ASSF Operating Manager IV, L.P. ("ASSF Operating Manager"), Ares Management LLC, Ares Management Holdings L.P. ("Ares Management Holdings"), Ares Holdco LLC ("Ares Holdco"), Ares Management Corporation ("Ares Management"), Ares Management GP LLC ("Ares Management GP"), Ares Voting LLC ("Ares Voting") and Ares Partners Holdco LLC ("Ares Partners", and together with the Ares Direct Holders, ACOF Investment Management, ASOF Investment Management, ASSF Operating Manager, Ares Management LLC, Ares Management Holdings, Ares Holdco, Ares Management, Ares Management GP, and Ares Voting, the "Reporting Persons"). Due to the electronic system's limitation of 10 Reporting Persons per joint filing, this statement is being filed in four parts.

F6 · balance_after: The Reporting Persons collectively beneficially own, or may be deemed to beneficially own, in the aggregate 35,205,125 shares of Common Stock (which aggregate ownership did not change as a result of the Transfers) by reason of the direct or indirect beneficial ownership of such shares as follows: (i) ACOF VI Frontier AIV A1 owns 249,805 shares of Common Stock; (ii) ACOF VI Frontier AIV A2 owns 89,581 shares of Common Stock; (iii) ACOF VI Frontier AIV A3 owns 20,902 shares of Common Stock; (iv) ACOF VI Frontier AIV A4 owns 271,730 shares of Common Stock; (v) ACOF VI Frontier AIV A5 owns 298,604 shares of Common Stock; (vi) ACOF VI Frontier AIV A6 owns 167,219 shares of Common Stock; (vii) ACOF VI Frontier AIV A7 owns 302,616 shares of Common Stock; (viii) ACOF VI Frontier AIV A8 owns shares 303,979 of Common Stock; (continued in next footnote)

F7 · balance_after: (ix) ACOF VI Frontier AIV A9 owns 285,466 shares of Common Stock; (x) ACOF VI Frontier AIV A10 owns 90,268 shares of Common Stock; (xi) ACOF VI Frontier AIV B1 owns 15,068,130 shares of Common Stock;(xii) ASOF Frontier AIV A1 owns 105,592 shares of Common Stock; (xiii) ASOF Frontier AIV A2 owns 18,032 shares of Common Stock; (xiv) ASOF Frontier AIV A3 owns 830,837 shares of Common Stock; (xv) ASOF Frontier AIV A4 owns 281,844 shares of Common Stock; (xvi) ASOF Frontier AIV A5 owns 167,160 shares of Common Stock; (xvii) ASOF Frontier AIV A6 owns 292,124 shares of Common Stock; (xviii) ASOF Frontier AIV A7 owns 289,417 shares of Common Stock; (xix) ASOF Frontier AIV A8 owns 238,026 shares of Common Stock; (xx) ASOF Frontier AIV A9 owns 360,644 shares of Common Stock; (xxi) ASOF Frontier AIV A10 owns 259,665 shares of Common Stock; (xxii) ASOF Frontier AIV A11 owns 245,236 shares of Common Stock; (continued in next footnote)

F8 · balance_after: (xiii) ASOF Frontier AIV B1 owns 9,597,579 shares of Common Stock; (xxiv) ASSF IV AIV B Holdings III owns 2,694,242 shares of Common Stock; and (xxv) ASSF IV AIV B directly or indirectly owns 2,654,041 shares of Common Stock. Because the aggregate number of shares of Common Stock sold by Ares Direct Holders in the Transfers equals the number of shares of Common Stock purchased by Ares Direct Holders in the Transfers, the total number of shares of Common Stock that Ares Management LLC (as well as ACOF Investment Management, ASOF Investment Management, ASSF Operating Manager, Ares Management Holdings, Ares Holdco, Ares Management Corporation, Ares Management GP, Ares Voting and Ares Partners Holdco), may be deemed to beneficially own did not change as a result of the Transfers.

F9 · balance_after: ACOF Investment Management is the manager of the ACOF Funds, ASOF Investment Management is the manager of ASOF Funds, ASSF Operating Manager is the manager of the ASSF Funds. Ares Management LLC is the sole member of ACOF Investment Management and ASOF Investment Management and the general partner of ASSF Operating Manager. Ares Management LLC has direct or indirect power to vote and/or dispose of the shares of Common Stock held by each Ares Direct Holder, and accordingly, Ares Management LLC may be deemed to have beneficial ownership of the shares of Common Stock reported herein. The sole member of Ares Management LLC is Ares Management Holdings and the general partner of Ares Management Holdings is Ares Holdco.

F10 · balance_after: The sole member of Ares Holdco is Ares Management. Ares Management GP is the sole holder of the Class B common stock, $0.01 par value per share, of Ares Management (the "Ares Class B Common Stock") and Ares Voting is the sole holder of the Class C common stock, $0.01 par value per share, of Ares Management (the "Ares Class C Common Stock"). (continued in next footnote)

F11 · balance_after: Pursuant to Ares Management's Certificate of Incorporation, the holders of the Ares Class B Common Stock and the Ares Class C Common Stock, collectively, will generally have the majority of the votes on any matter submitted to the stockholders of Ares Management if certain conditions are met. The sole member of both Ares Management GP and Ares Voting is Ares Partners. Ares Partners is managed by a board of managers, which is composed of Michael Arougheti, Ryan Berry, R. Kipp deVeer, David Kaplan, Antony Ressler and Bennett Rosenthal (collectively, the "Board Members"). Mr. Ressler generally has veto authority over decisions by the Board Members. (continued in next footnote)

F12 · balance_after: Each of the Reporting Persons, and the Board Members, and the other directors, officers, partners, stockholders, members and managers of the Reporting Persons, expressly disclaims beneficial ownership of the Common Stock, except to the extent of any pecuniary interest therein, and this Form 4 shall not be deemed an admission that any such person or entity is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purposes.

F2 · ownership.nature: This statement is being filed by ACOF VI Frontier AIV A1, L.P. ("ACOF VI Frontier AIV A1"), ACOF VI Frontier AIV A2, L.P. ("ACOF VI Frontier AIV A2"), ACOF VI Frontier AIV A3, L.P. ("ACOF VI Frontier AIV A3"), ACOF VI Frontier AIV A4, L.P. ("ACOF VI Frontier AIV A4"), ACOF VI Frontier AIV A5, L.P. ("ACOF VI Frontier AIV A5"), ACOF VI Frontier AIV A6, L.P. ("ACOF VI Frontier AIV A6"), ACOF VI Frontier AIV A7, L.P. ("ACOF VI Frontier AIV A7"), ACOF VI Frontier AIV A8, L.P. ("ACOF VI Frontier AIV A8"), ACOF VI Frontier AIV A9, L.P. ("ACOF VI Frontier AIV A9"), ACOF VI Frontier AIV A10, L.P. ("ACOF VI Frontier AIV A10"), and ACOF VI Frontier AIV B1, L.P. ("ACOF VI Frontier AIV B1", together with the foregoing entities, the "ACOF Funds"), (continued in next footnote)

F3 · ownership.nature: ASOF Frontier AIV A1, L.P. ("ASOF Frontier AIV A1"), ASOF Frontier AIV A2, L.P. ("ASOF Frontier AIV A2"), ASOF Frontier AIV A3, L.P. ("ASOF Frontier AIV A3"), ASOF Frontier AIV A4, L.P. ("ASOF Frontier AIV A4"), ASOF Frontier AIV A5, L.P. ("ASOF Frontier AIV A5"), ASOF Frontier AIV A6, L.P. ("ASOF Frontier AIV A6"), ASOF Frontier AIV A7, L.P. ("ASOF Frontier AIV A7"), ASOF Frontier AIV A8, L.P. ("ASOF Frontier AIV A8"), ASOF Frontier AIV A9, L.P. ("ASOF Frontier AIV A9"), ASOF Frontier AIV A10, L.P. ("ASOF Frontier AIV A10"), ASOF Frontier AIV A11, L.P. ("ASOF Frontier AIV A11"), (continued in next footnote)

F4 · ownership.nature: and ASOF Frontier AIV B1, L.P. ("ASOF Frontier AIV B1", together with ASOF Frontier AIV A1, ASOF Frontier AIV A2, ASOF Frontier AIV A3, ASOF Frontier AIV A4, ASOF Frontier AIV A5, ASOF Frontier AIV A6, ASOF Frontier AIV A7, ASOF Frontier AIV A8, ASOF Frontier AIV A9, ASOF Frontier AIV A10, and ASOF Frontier AIV A11, the "ASOF Funds"), ASSF IV AIV B Holdings III, L.P. ("ASSF IV AIV B Holdings III"), ASSF IV AIV B, L.P. ("ASSF IV AIV B", and together with ASSF IV AIV B Holdings III, the "ASSF Funds", and together with the ACOF Funds, and the ASOF Funds, the "Ares Direct Holders"), (continued in next footnote)

F5 · ownership.nature: ACOF Investment Management LLC ("ACOF Investment Management"), ASOF Investment Management LLC ("ASOF Investment Management"), ASSF Operating Manager IV, L.P. ("ASSF Operating Manager"), Ares Management LLC, Ares Management Holdings L.P. ("Ares Management Holdings"), Ares Holdco LLC ("Ares Holdco"), Ares Management Corporation ("Ares Management"), Ares Management GP LLC ("Ares Management GP"), Ares Voting LLC ("Ares Voting") and Ares Partners Holdco LLC ("Ares Partners", and together with the Ares Direct Holders, ACOF Investment Management, ASOF Investment Management, ASSF Operating Manager, Ares Management LLC, Ares Management Holdings, Ares Holdco, Ares Management, Ares Management GP, and Ares Voting, the "Reporting Persons"). Due to the electronic system's limitation of 10 Reporting Persons per joint filing, this statement is being filed in four parts.

F6 · ownership.nature: The Reporting Persons collectively beneficially own, or may be deemed to beneficially own, in the aggregate 35,205,125 shares of Common Stock (which aggregate ownership did not change as a result of the Transfers) by reason of the direct or indirect beneficial ownership of such shares as follows: (i) ACOF VI Frontier AIV A1 owns 249,805 shares of Common Stock; (ii) ACOF VI Frontier AIV A2 owns 89,581 shares of Common Stock; (iii) ACOF VI Frontier AIV A3 owns 20,902 shares of Common Stock; (iv) ACOF VI Frontier AIV A4 owns 271,730 shares of Common Stock; (v) ACOF VI Frontier AIV A5 owns 298,604 shares of Common Stock; (vi) ACOF VI Frontier AIV A6 owns 167,219 shares of Common Stock; (vii) ACOF VI Frontier AIV A7 owns 302,616 shares of Common Stock; (viii) ACOF VI Frontier AIV A8 owns shares 303,979 of Common Stock; (continued in next footnote)

F7 · ownership.nature: (ix) ACOF VI Frontier AIV A9 owns 285,466 shares of Common Stock; (x) ACOF VI Frontier AIV A10 owns 90,268 shares of Common Stock; (xi) ACOF VI Frontier AIV B1 owns 15,068,130 shares of Common Stock;(xii) ASOF Frontier AIV A1 owns 105,592 shares of Common Stock; (xiii) ASOF Frontier AIV A2 owns 18,032 shares of Common Stock; (xiv) ASOF Frontier AIV A3 owns 830,837 shares of Common Stock; (xv) ASOF Frontier AIV A4 owns 281,844 shares of Common Stock; (xvi) ASOF Frontier AIV A5 owns 167,160 shares of Common Stock; (xvii) ASOF Frontier AIV A6 owns 292,124 shares of Common Stock; (xviii) ASOF Frontier AIV A7 owns 289,417 shares of Common Stock; (xix) ASOF Frontier AIV A8 owns 238,026 shares of Common Stock; (xx) ASOF Frontier AIV A9 owns 360,644 shares of Common Stock; (xxi) ASOF Frontier AIV A10 owns 259,665 shares of Common Stock; (xxii) ASOF Frontier AIV A11 owns 245,236 shares of Common Stock; (continued in next footnote)

F8 · ownership.nature: (xiii) ASOF Frontier AIV B1 owns 9,597,579 shares of Common Stock; (xxiv) ASSF IV AIV B Holdings III owns 2,694,242 shares of Common Stock; and (xxv) ASSF IV AIV B directly or indirectly owns 2,654,041 shares of Common Stock. Because the aggregate number of shares of Common Stock sold by Ares Direct Holders in the Transfers equals the number of shares of Common Stock purchased by Ares Direct Holders in the Transfers, the total number of shares of Common Stock that Ares Management LLC (as well as ACOF Investment Management, ASOF Investment Management, ASSF Operating Manager, Ares Management Holdings, Ares Holdco, Ares Management Corporation, Ares Management GP, Ares Voting and Ares Partners Holdco), may be deemed to beneficially own did not change as a result of the Transfers.

F9 · ownership.nature: ACOF Investment Management is the manager of the ACOF Funds, ASOF Investment Management is the manager of ASOF Funds, ASSF Operating Manager is the manager of the ASSF Funds. Ares Management LLC is the sole member of ACOF Investment Management and ASOF Investment Management and the general partner of ASSF Operating Manager. Ares Management LLC has direct or indirect power to vote and/or dispose of the shares of Common Stock held by each Ares Direct Holder, and accordingly, Ares Management LLC may be deemed to have beneficial ownership of the shares of Common Stock reported herein. The sole member of Ares Management LLC is Ares Management Holdings and the general partner of Ares Management Holdings is Ares Holdco.

F10 · ownership.nature: The sole member of Ares Holdco is Ares Management. Ares Management GP is the sole holder of the Class B common stock, $0.01 par value per share, of Ares Management (the "Ares Class B Common Stock") and Ares Voting is the sole holder of the Class C common stock, $0.01 par value per share, of Ares Management (the "Ares Class C Common Stock"). (continued in next footnote)

F11 · ownership.nature: Pursuant to Ares Management's Certificate of Incorporation, the holders of the Ares Class B Common Stock and the Ares Class C Common Stock, collectively, will generally have the majority of the votes on any matter submitted to the stockholders of Ares Management if certain conditions are met. The sole member of both Ares Management GP and Ares Voting is Ares Partners. Ares Partners is managed by a board of managers, which is composed of Michael Arougheti, Ryan Berry, R. Kipp deVeer, David Kaplan, Antony Ressler and Bennett Rosenthal (collectively, the "Board Members"). Mr. Ressler generally has veto authority over decisions by the Board Members. (continued in next footnote)

F12 · ownership.nature: Each of the Reporting Persons, and the Board Members, and the other directors, officers, partners, stockholders, members and managers of the Reporting Persons, expressly disclaims beneficial ownership of the Common Stock, except to the extent of any pecuniary interest therein, and this Form 4 shall not be deemed an admission that any such person or entity is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purposes.

SEC source: 0001104659-21-120390 · tm2128492-1_4seq1.xml · nonDerivative · entry 17

ARES MANAGEMENT LLC · CIK 0001259313 · 10% owner

ACOF VI Frontier AIV A1, L.P. · CIK 0001862494 · 10% owner

ACOF VI Frontier AIV A2, L.P. · CIK 0001862499 · 10% owner

ACOF VI Frontier AIV A3, L.P. · CIK 0001862534 · 10% owner

ACOF VI Frontier AIV A4, L.P. · CIK 0001862529 · 10% owner

ACOF VI Frontier AIV A5, L.P. · CIK 0001862526 · 10% owner

ACOF VI Frontier AIV A6, L.P. · CIK 0001862483 · 10% owner

ACOF VI Frontier AIV A7, L.P. · CIK 0001862482 · 10% owner

ACOF VI Frontier AIV A8, L.P. · CIK 0001862505 · 10% owner

ACOF VI Frontier AIV A9, L.P. · CIK 0001862533 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · ACOF VI Frontier AIV A5, L.P.

Disclosed balance after: 298,604

F1 · kind: These transactions reflect inter-fund transfers (the "Transfers") of shares of the Issuer's Common Stock from one Ares Direct Holder (as defined below) to another Ares Direct Holder in connection with an internal rebalancing of such Ares Direct Holders' holdings of Common Stock. Each Transfer occurred at the same time and at the same price.

F2 · balance_after: This statement is being filed by ACOF VI Frontier AIV A1, L.P. ("ACOF VI Frontier AIV A1"), ACOF VI Frontier AIV A2, L.P. ("ACOF VI Frontier AIV A2"), ACOF VI Frontier AIV A3, L.P. ("ACOF VI Frontier AIV A3"), ACOF VI Frontier AIV A4, L.P. ("ACOF VI Frontier AIV A4"), ACOF VI Frontier AIV A5, L.P. ("ACOF VI Frontier AIV A5"), ACOF VI Frontier AIV A6, L.P. ("ACOF VI Frontier AIV A6"), ACOF VI Frontier AIV A7, L.P. ("ACOF VI Frontier AIV A7"), ACOF VI Frontier AIV A8, L.P. ("ACOF VI Frontier AIV A8"), ACOF VI Frontier AIV A9, L.P. ("ACOF VI Frontier AIV A9"), ACOF VI Frontier AIV A10, L.P. ("ACOF VI Frontier AIV A10"), and ACOF VI Frontier AIV B1, L.P. ("ACOF VI Frontier AIV B1", together with the foregoing entities, the "ACOF Funds"), (continued in next footnote)

F3 · balance_after: ASOF Frontier AIV A1, L.P. ("ASOF Frontier AIV A1"), ASOF Frontier AIV A2, L.P. ("ASOF Frontier AIV A2"), ASOF Frontier AIV A3, L.P. ("ASOF Frontier AIV A3"), ASOF Frontier AIV A4, L.P. ("ASOF Frontier AIV A4"), ASOF Frontier AIV A5, L.P. ("ASOF Frontier AIV A5"), ASOF Frontier AIV A6, L.P. ("ASOF Frontier AIV A6"), ASOF Frontier AIV A7, L.P. ("ASOF Frontier AIV A7"), ASOF Frontier AIV A8, L.P. ("ASOF Frontier AIV A8"), ASOF Frontier AIV A9, L.P. ("ASOF Frontier AIV A9"), ASOF Frontier AIV A10, L.P. ("ASOF Frontier AIV A10"), ASOF Frontier AIV A11, L.P. ("ASOF Frontier AIV A11"), (continued in next footnote)

F4 · balance_after: and ASOF Frontier AIV B1, L.P. ("ASOF Frontier AIV B1", together with ASOF Frontier AIV A1, ASOF Frontier AIV A2, ASOF Frontier AIV A3, ASOF Frontier AIV A4, ASOF Frontier AIV A5, ASOF Frontier AIV A6, ASOF Frontier AIV A7, ASOF Frontier AIV A8, ASOF Frontier AIV A9, ASOF Frontier AIV A10, and ASOF Frontier AIV A11, the "ASOF Funds"), ASSF IV AIV B Holdings III, L.P. ("ASSF IV AIV B Holdings III"), ASSF IV AIV B, L.P. ("ASSF IV AIV B", and together with ASSF IV AIV B Holdings III, the "ASSF Funds", and together with the ACOF Funds, and the ASOF Funds, the "Ares Direct Holders"), (continued in next footnote)

F5 · balance_after: ACOF Investment Management LLC ("ACOF Investment Management"), ASOF Investment Management LLC ("ASOF Investment Management"), ASSF Operating Manager IV, L.P. ("ASSF Operating Manager"), Ares Management LLC, Ares Management Holdings L.P. ("Ares Management Holdings"), Ares Holdco LLC ("Ares Holdco"), Ares Management Corporation ("Ares Management"), Ares Management GP LLC ("Ares Management GP"), Ares Voting LLC ("Ares Voting") and Ares Partners Holdco LLC ("Ares Partners", and together with the Ares Direct Holders, ACOF Investment Management, ASOF Investment Management, ASSF Operating Manager, Ares Management LLC, Ares Management Holdings, Ares Holdco, Ares Management, Ares Management GP, and Ares Voting, the "Reporting Persons"). Due to the electronic system's limitation of 10 Reporting Persons per joint filing, this statement is being filed in four parts.

F6 · balance_after: The Reporting Persons collectively beneficially own, or may be deemed to beneficially own, in the aggregate 35,205,125 shares of Common Stock (which aggregate ownership did not change as a result of the Transfers) by reason of the direct or indirect beneficial ownership of such shares as follows: (i) ACOF VI Frontier AIV A1 owns 249,805 shares of Common Stock; (ii) ACOF VI Frontier AIV A2 owns 89,581 shares of Common Stock; (iii) ACOF VI Frontier AIV A3 owns 20,902 shares of Common Stock; (iv) ACOF VI Frontier AIV A4 owns 271,730 shares of Common Stock; (v) ACOF VI Frontier AIV A5 owns 298,604 shares of Common Stock; (vi) ACOF VI Frontier AIV A6 owns 167,219 shares of Common Stock; (vii) ACOF VI Frontier AIV A7 owns 302,616 shares of Common Stock; (viii) ACOF VI Frontier AIV A8 owns shares 303,979 of Common Stock; (continued in next footnote)

F7 · balance_after: (ix) ACOF VI Frontier AIV A9 owns 285,466 shares of Common Stock; (x) ACOF VI Frontier AIV A10 owns 90,268 shares of Common Stock; (xi) ACOF VI Frontier AIV B1 owns 15,068,130 shares of Common Stock;(xii) ASOF Frontier AIV A1 owns 105,592 shares of Common Stock; (xiii) ASOF Frontier AIV A2 owns 18,032 shares of Common Stock; (xiv) ASOF Frontier AIV A3 owns 830,837 shares of Common Stock; (xv) ASOF Frontier AIV A4 owns 281,844 shares of Common Stock; (xvi) ASOF Frontier AIV A5 owns 167,160 shares of Common Stock; (xvii) ASOF Frontier AIV A6 owns 292,124 shares of Common Stock; (xviii) ASOF Frontier AIV A7 owns 289,417 shares of Common Stock; (xix) ASOF Frontier AIV A8 owns 238,026 shares of Common Stock; (xx) ASOF Frontier AIV A9 owns 360,644 shares of Common Stock; (xxi) ASOF Frontier AIV A10 owns 259,665 shares of Common Stock; (xxii) ASOF Frontier AIV A11 owns 245,236 shares of Common Stock; (continued in next footnote)

F8 · balance_after: (xiii) ASOF Frontier AIV B1 owns 9,597,579 shares of Common Stock; (xxiv) ASSF IV AIV B Holdings III owns 2,694,242 shares of Common Stock; and (xxv) ASSF IV AIV B directly or indirectly owns 2,654,041 shares of Common Stock. Because the aggregate number of shares of Common Stock sold by Ares Direct Holders in the Transfers equals the number of shares of Common Stock purchased by Ares Direct Holders in the Transfers, the total number of shares of Common Stock that Ares Management LLC (as well as ACOF Investment Management, ASOF Investment Management, ASSF Operating Manager, Ares Management Holdings, Ares Holdco, Ares Management Corporation, Ares Management GP, Ares Voting and Ares Partners Holdco), may be deemed to beneficially own did not change as a result of the Transfers.

F9 · balance_after: ACOF Investment Management is the manager of the ACOF Funds, ASOF Investment Management is the manager of ASOF Funds, ASSF Operating Manager is the manager of the ASSF Funds. Ares Management LLC is the sole member of ACOF Investment Management and ASOF Investment Management and the general partner of ASSF Operating Manager. Ares Management LLC has direct or indirect power to vote and/or dispose of the shares of Common Stock held by each Ares Direct Holder, and accordingly, Ares Management LLC may be deemed to have beneficial ownership of the shares of Common Stock reported herein. The sole member of Ares Management LLC is Ares Management Holdings and the general partner of Ares Management Holdings is Ares Holdco.

F10 · balance_after: The sole member of Ares Holdco is Ares Management. Ares Management GP is the sole holder of the Class B common stock, $0.01 par value per share, of Ares Management (the "Ares Class B Common Stock") and Ares Voting is the sole holder of the Class C common stock, $0.01 par value per share, of Ares Management (the "Ares Class C Common Stock"). (continued in next footnote)

F11 · balance_after: Pursuant to Ares Management's Certificate of Incorporation, the holders of the Ares Class B Common Stock and the Ares Class C Common Stock, collectively, will generally have the majority of the votes on any matter submitted to the stockholders of Ares Management if certain conditions are met. The sole member of both Ares Management GP and Ares Voting is Ares Partners. Ares Partners is managed by a board of managers, which is composed of Michael Arougheti, Ryan Berry, R. Kipp deVeer, David Kaplan, Antony Ressler and Bennett Rosenthal (collectively, the "Board Members"). Mr. Ressler generally has veto authority over decisions by the Board Members. (continued in next footnote)

F12 · balance_after: Each of the Reporting Persons, and the Board Members, and the other directors, officers, partners, stockholders, members and managers of the Reporting Persons, expressly disclaims beneficial ownership of the Common Stock, except to the extent of any pecuniary interest therein, and this Form 4 shall not be deemed an admission that any such person or entity is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purposes.

F2 · ownership.nature: This statement is being filed by ACOF VI Frontier AIV A1, L.P. ("ACOF VI Frontier AIV A1"), ACOF VI Frontier AIV A2, L.P. ("ACOF VI Frontier AIV A2"), ACOF VI Frontier AIV A3, L.P. ("ACOF VI Frontier AIV A3"), ACOF VI Frontier AIV A4, L.P. ("ACOF VI Frontier AIV A4"), ACOF VI Frontier AIV A5, L.P. ("ACOF VI Frontier AIV A5"), ACOF VI Frontier AIV A6, L.P. ("ACOF VI Frontier AIV A6"), ACOF VI Frontier AIV A7, L.P. ("ACOF VI Frontier AIV A7"), ACOF VI Frontier AIV A8, L.P. ("ACOF VI Frontier AIV A8"), ACOF VI Frontier AIV A9, L.P. ("ACOF VI Frontier AIV A9"), ACOF VI Frontier AIV A10, L.P. ("ACOF VI Frontier AIV A10"), and ACOF VI Frontier AIV B1, L.P. ("ACOF VI Frontier AIV B1", together with the foregoing entities, the "ACOF Funds"), (continued in next footnote)

F3 · ownership.nature: ASOF Frontier AIV A1, L.P. ("ASOF Frontier AIV A1"), ASOF Frontier AIV A2, L.P. ("ASOF Frontier AIV A2"), ASOF Frontier AIV A3, L.P. ("ASOF Frontier AIV A3"), ASOF Frontier AIV A4, L.P. ("ASOF Frontier AIV A4"), ASOF Frontier AIV A5, L.P. ("ASOF Frontier AIV A5"), ASOF Frontier AIV A6, L.P. ("ASOF Frontier AIV A6"), ASOF Frontier AIV A7, L.P. ("ASOF Frontier AIV A7"), ASOF Frontier AIV A8, L.P. ("ASOF Frontier AIV A8"), ASOF Frontier AIV A9, L.P. ("ASOF Frontier AIV A9"), ASOF Frontier AIV A10, L.P. ("ASOF Frontier AIV A10"), ASOF Frontier AIV A11, L.P. ("ASOF Frontier AIV A11"), (continued in next footnote)

F4 · ownership.nature: and ASOF Frontier AIV B1, L.P. ("ASOF Frontier AIV B1", together with ASOF Frontier AIV A1, ASOF Frontier AIV A2, ASOF Frontier AIV A3, ASOF Frontier AIV A4, ASOF Frontier AIV A5, ASOF Frontier AIV A6, ASOF Frontier AIV A7, ASOF Frontier AIV A8, ASOF Frontier AIV A9, ASOF Frontier AIV A10, and ASOF Frontier AIV A11, the "ASOF Funds"), ASSF IV AIV B Holdings III, L.P. ("ASSF IV AIV B Holdings III"), ASSF IV AIV B, L.P. ("ASSF IV AIV B", and together with ASSF IV AIV B Holdings III, the "ASSF Funds", and together with the ACOF Funds, and the ASOF Funds, the "Ares Direct Holders"), (continued in next footnote)

F5 · ownership.nature: ACOF Investment Management LLC ("ACOF Investment Management"), ASOF Investment Management LLC ("ASOF Investment Management"), ASSF Operating Manager IV, L.P. ("ASSF Operating Manager"), Ares Management LLC, Ares Management Holdings L.P. ("Ares Management Holdings"), Ares Holdco LLC ("Ares Holdco"), Ares Management Corporation ("Ares Management"), Ares Management GP LLC ("Ares Management GP"), Ares Voting LLC ("Ares Voting") and Ares Partners Holdco LLC ("Ares Partners", and together with the Ares Direct Holders, ACOF Investment Management, ASOF Investment Management, ASSF Operating Manager, Ares Management LLC, Ares Management Holdings, Ares Holdco, Ares Management, Ares Management GP, and Ares Voting, the "Reporting Persons"). Due to the electronic system's limitation of 10 Reporting Persons per joint filing, this statement is being filed in four parts.

F6 · ownership.nature: The Reporting Persons collectively beneficially own, or may be deemed to beneficially own, in the aggregate 35,205,125 shares of Common Stock (which aggregate ownership did not change as a result of the Transfers) by reason of the direct or indirect beneficial ownership of such shares as follows: (i) ACOF VI Frontier AIV A1 owns 249,805 shares of Common Stock; (ii) ACOF VI Frontier AIV A2 owns 89,581 shares of Common Stock; (iii) ACOF VI Frontier AIV A3 owns 20,902 shares of Common Stock; (iv) ACOF VI Frontier AIV A4 owns 271,730 shares of Common Stock; (v) ACOF VI Frontier AIV A5 owns 298,604 shares of Common Stock; (vi) ACOF VI Frontier AIV A6 owns 167,219 shares of Common Stock; (vii) ACOF VI Frontier AIV A7 owns 302,616 shares of Common Stock; (viii) ACOF VI Frontier AIV A8 owns shares 303,979 of Common Stock; (continued in next footnote)

F7 · ownership.nature: (ix) ACOF VI Frontier AIV A9 owns 285,466 shares of Common Stock; (x) ACOF VI Frontier AIV A10 owns 90,268 shares of Common Stock; (xi) ACOF VI Frontier AIV B1 owns 15,068,130 shares of Common Stock;(xii) ASOF Frontier AIV A1 owns 105,592 shares of Common Stock; (xiii) ASOF Frontier AIV A2 owns 18,032 shares of Common Stock; (xiv) ASOF Frontier AIV A3 owns 830,837 shares of Common Stock; (xv) ASOF Frontier AIV A4 owns 281,844 shares of Common Stock; (xvi) ASOF Frontier AIV A5 owns 167,160 shares of Common Stock; (xvii) ASOF Frontier AIV A6 owns 292,124 shares of Common Stock; (xviii) ASOF Frontier AIV A7 owns 289,417 shares of Common Stock; (xix) ASOF Frontier AIV A8 owns 238,026 shares of Common Stock; (xx) ASOF Frontier AIV A9 owns 360,644 shares of Common Stock; (xxi) ASOF Frontier AIV A10 owns 259,665 shares of Common Stock; (xxii) ASOF Frontier AIV A11 owns 245,236 shares of Common Stock; (continued in next footnote)

F8 · ownership.nature: (xiii) ASOF Frontier AIV B1 owns 9,597,579 shares of Common Stock; (xxiv) ASSF IV AIV B Holdings III owns 2,694,242 shares of Common Stock; and (xxv) ASSF IV AIV B directly or indirectly owns 2,654,041 shares of Common Stock. Because the aggregate number of shares of Common Stock sold by Ares Direct Holders in the Transfers equals the number of shares of Common Stock purchased by Ares Direct Holders in the Transfers, the total number of shares of Common Stock that Ares Management LLC (as well as ACOF Investment Management, ASOF Investment Management, ASSF Operating Manager, Ares Management Holdings, Ares Holdco, Ares Management Corporation, Ares Management GP, Ares Voting and Ares Partners Holdco), may be deemed to beneficially own did not change as a result of the Transfers.

F9 · ownership.nature: ACOF Investment Management is the manager of the ACOF Funds, ASOF Investment Management is the manager of ASOF Funds, ASSF Operating Manager is the manager of the ASSF Funds. Ares Management LLC is the sole member of ACOF Investment Management and ASOF Investment Management and the general partner of ASSF Operating Manager. Ares Management LLC has direct or indirect power to vote and/or dispose of the shares of Common Stock held by each Ares Direct Holder, and accordingly, Ares Management LLC may be deemed to have beneficial ownership of the shares of Common Stock reported herein. The sole member of Ares Management LLC is Ares Management Holdings and the general partner of Ares Management Holdings is Ares Holdco.

F10 · ownership.nature: The sole member of Ares Holdco is Ares Management. Ares Management GP is the sole holder of the Class B common stock, $0.01 par value per share, of Ares Management (the "Ares Class B Common Stock") and Ares Voting is the sole holder of the Class C common stock, $0.01 par value per share, of Ares Management (the "Ares Class C Common Stock"). (continued in next footnote)

F11 · ownership.nature: Pursuant to Ares Management's Certificate of Incorporation, the holders of the Ares Class B Common Stock and the Ares Class C Common Stock, collectively, will generally have the majority of the votes on any matter submitted to the stockholders of Ares Management if certain conditions are met. The sole member of both Ares Management GP and Ares Voting is Ares Partners. Ares Partners is managed by a board of managers, which is composed of Michael Arougheti, Ryan Berry, R. Kipp deVeer, David Kaplan, Antony Ressler and Bennett Rosenthal (collectively, the "Board Members"). Mr. Ressler generally has veto authority over decisions by the Board Members. (continued in next footnote)

F12 · ownership.nature: Each of the Reporting Persons, and the Board Members, and the other directors, officers, partners, stockholders, members and managers of the Reporting Persons, expressly disclaims beneficial ownership of the Common Stock, except to the extent of any pecuniary interest therein, and this Form 4 shall not be deemed an admission that any such person or entity is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purposes.

SEC source: 0001104659-21-120390 · tm2128492-1_4seq1.xml · nonDerivative · entry 16

ARES MANAGEMENT LLC · CIK 0001259313 · 10% owner

ACOF VI Frontier AIV A1, L.P. · CIK 0001862494 · 10% owner

ACOF VI Frontier AIV A2, L.P. · CIK 0001862499 · 10% owner

ACOF VI Frontier AIV A3, L.P. · CIK 0001862534 · 10% owner

ACOF VI Frontier AIV A4, L.P. · CIK 0001862529 · 10% owner

ACOF VI Frontier AIV A5, L.P. · CIK 0001862526 · 10% owner

ACOF VI Frontier AIV A6, L.P. · CIK 0001862483 · 10% owner

ACOF VI Frontier AIV A7, L.P. · CIK 0001862482 · 10% owner

ACOF VI Frontier AIV A8, L.P. · CIK 0001862505 · 10% owner

ACOF VI Frontier AIV A9, L.P. · CIK 0001862533 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · ACOF VI Frontier AIV A4, L.P.

Disclosed balance after: 271,730

F1 · kind: These transactions reflect inter-fund transfers (the "Transfers") of shares of the Issuer's Common Stock from one Ares Direct Holder (as defined below) to another Ares Direct Holder in connection with an internal rebalancing of such Ares Direct Holders' holdings of Common Stock. Each Transfer occurred at the same time and at the same price.

F2 · balance_after: This statement is being filed by ACOF VI Frontier AIV A1, L.P. ("ACOF VI Frontier AIV A1"), ACOF VI Frontier AIV A2, L.P. ("ACOF VI Frontier AIV A2"), ACOF VI Frontier AIV A3, L.P. ("ACOF VI Frontier AIV A3"), ACOF VI Frontier AIV A4, L.P. ("ACOF VI Frontier AIV A4"), ACOF VI Frontier AIV A5, L.P. ("ACOF VI Frontier AIV A5"), ACOF VI Frontier AIV A6, L.P. ("ACOF VI Frontier AIV A6"), ACOF VI Frontier AIV A7, L.P. ("ACOF VI Frontier AIV A7"), ACOF VI Frontier AIV A8, L.P. ("ACOF VI Frontier AIV A8"), ACOF VI Frontier AIV A9, L.P. ("ACOF VI Frontier AIV A9"), ACOF VI Frontier AIV A10, L.P. ("ACOF VI Frontier AIV A10"), and ACOF VI Frontier AIV B1, L.P. ("ACOF VI Frontier AIV B1", together with the foregoing entities, the "ACOF Funds"), (continued in next footnote)

F3 · balance_after: ASOF Frontier AIV A1, L.P. ("ASOF Frontier AIV A1"), ASOF Frontier AIV A2, L.P. ("ASOF Frontier AIV A2"), ASOF Frontier AIV A3, L.P. ("ASOF Frontier AIV A3"), ASOF Frontier AIV A4, L.P. ("ASOF Frontier AIV A4"), ASOF Frontier AIV A5, L.P. ("ASOF Frontier AIV A5"), ASOF Frontier AIV A6, L.P. ("ASOF Frontier AIV A6"), ASOF Frontier AIV A7, L.P. ("ASOF Frontier AIV A7"), ASOF Frontier AIV A8, L.P. ("ASOF Frontier AIV A8"), ASOF Frontier AIV A9, L.P. ("ASOF Frontier AIV A9"), ASOF Frontier AIV A10, L.P. ("ASOF Frontier AIV A10"), ASOF Frontier AIV A11, L.P. ("ASOF Frontier AIV A11"), (continued in next footnote)

F4 · balance_after: and ASOF Frontier AIV B1, L.P. ("ASOF Frontier AIV B1", together with ASOF Frontier AIV A1, ASOF Frontier AIV A2, ASOF Frontier AIV A3, ASOF Frontier AIV A4, ASOF Frontier AIV A5, ASOF Frontier AIV A6, ASOF Frontier AIV A7, ASOF Frontier AIV A8, ASOF Frontier AIV A9, ASOF Frontier AIV A10, and ASOF Frontier AIV A11, the "ASOF Funds"), ASSF IV AIV B Holdings III, L.P. ("ASSF IV AIV B Holdings III"), ASSF IV AIV B, L.P. ("ASSF IV AIV B", and together with ASSF IV AIV B Holdings III, the "ASSF Funds", and together with the ACOF Funds, and the ASOF Funds, the "Ares Direct Holders"), (continued in next footnote)

F5 · balance_after: ACOF Investment Management LLC ("ACOF Investment Management"), ASOF Investment Management LLC ("ASOF Investment Management"), ASSF Operating Manager IV, L.P. ("ASSF Operating Manager"), Ares Management LLC, Ares Management Holdings L.P. ("Ares Management Holdings"), Ares Holdco LLC ("Ares Holdco"), Ares Management Corporation ("Ares Management"), Ares Management GP LLC ("Ares Management GP"), Ares Voting LLC ("Ares Voting") and Ares Partners Holdco LLC ("Ares Partners", and together with the Ares Direct Holders, ACOF Investment Management, ASOF Investment Management, ASSF Operating Manager, Ares Management LLC, Ares Management Holdings, Ares Holdco, Ares Management, Ares Management GP, and Ares Voting, the "Reporting Persons"). Due to the electronic system's limitation of 10 Reporting Persons per joint filing, this statement is being filed in four parts.

F6 · balance_after: The Reporting Persons collectively beneficially own, or may be deemed to beneficially own, in the aggregate 35,205,125 shares of Common Stock (which aggregate ownership did not change as a result of the Transfers) by reason of the direct or indirect beneficial ownership of such shares as follows: (i) ACOF VI Frontier AIV A1 owns 249,805 shares of Common Stock; (ii) ACOF VI Frontier AIV A2 owns 89,581 shares of Common Stock; (iii) ACOF VI Frontier AIV A3 owns 20,902 shares of Common Stock; (iv) ACOF VI Frontier AIV A4 owns 271,730 shares of Common Stock; (v) ACOF VI Frontier AIV A5 owns 298,604 shares of Common Stock; (vi) ACOF VI Frontier AIV A6 owns 167,219 shares of Common Stock; (vii) ACOF VI Frontier AIV A7 owns 302,616 shares of Common Stock; (viii) ACOF VI Frontier AIV A8 owns shares 303,979 of Common Stock; (continued in next footnote)

F7 · balance_after: (ix) ACOF VI Frontier AIV A9 owns 285,466 shares of Common Stock; (x) ACOF VI Frontier AIV A10 owns 90,268 shares of Common Stock; (xi) ACOF VI Frontier AIV B1 owns 15,068,130 shares of Common Stock;(xii) ASOF Frontier AIV A1 owns 105,592 shares of Common Stock; (xiii) ASOF Frontier AIV A2 owns 18,032 shares of Common Stock; (xiv) ASOF Frontier AIV A3 owns 830,837 shares of Common Stock; (xv) ASOF Frontier AIV A4 owns 281,844 shares of Common Stock; (xvi) ASOF Frontier AIV A5 owns 167,160 shares of Common Stock; (xvii) ASOF Frontier AIV A6 owns 292,124 shares of Common Stock; (xviii) ASOF Frontier AIV A7 owns 289,417 shares of Common Stock; (xix) ASOF Frontier AIV A8 owns 238,026 shares of Common Stock; (xx) ASOF Frontier AIV A9 owns 360,644 shares of Common Stock; (xxi) ASOF Frontier AIV A10 owns 259,665 shares of Common Stock; (xxii) ASOF Frontier AIV A11 owns 245,236 shares of Common Stock; (continued in next footnote)

F8 · balance_after: (xiii) ASOF Frontier AIV B1 owns 9,597,579 shares of Common Stock; (xxiv) ASSF IV AIV B Holdings III owns 2,694,242 shares of Common Stock; and (xxv) ASSF IV AIV B directly or indirectly owns 2,654,041 shares of Common Stock. Because the aggregate number of shares of Common Stock sold by Ares Direct Holders in the Transfers equals the number of shares of Common Stock purchased by Ares Direct Holders in the Transfers, the total number of shares of Common Stock that Ares Management LLC (as well as ACOF Investment Management, ASOF Investment Management, ASSF Operating Manager, Ares Management Holdings, Ares Holdco, Ares Management Corporation, Ares Management GP, Ares Voting and Ares Partners Holdco), may be deemed to beneficially own did not change as a result of the Transfers.

F9 · balance_after: ACOF Investment Management is the manager of the ACOF Funds, ASOF Investment Management is the manager of ASOF Funds, ASSF Operating Manager is the manager of the ASSF Funds. Ares Management LLC is the sole member of ACOF Investment Management and ASOF Investment Management and the general partner of ASSF Operating Manager. Ares Management LLC has direct or indirect power to vote and/or dispose of the shares of Common Stock held by each Ares Direct Holder, and accordingly, Ares Management LLC may be deemed to have beneficial ownership of the shares of Common Stock reported herein. The sole member of Ares Management LLC is Ares Management Holdings and the general partner of Ares Management Holdings is Ares Holdco.

F10 · balance_after: The sole member of Ares Holdco is Ares Management. Ares Management GP is the sole holder of the Class B common stock, $0.01 par value per share, of Ares Management (the "Ares Class B Common Stock") and Ares Voting is the sole holder of the Class C common stock, $0.01 par value per share, of Ares Management (the "Ares Class C Common Stock"). (continued in next footnote)

F11 · balance_after: Pursuant to Ares Management's Certificate of Incorporation, the holders of the Ares Class B Common Stock and the Ares Class C Common Stock, collectively, will generally have the majority of the votes on any matter submitted to the stockholders of Ares Management if certain conditions are met. The sole member of both Ares Management GP and Ares Voting is Ares Partners. Ares Partners is managed by a board of managers, which is composed of Michael Arougheti, Ryan Berry, R. Kipp deVeer, David Kaplan, Antony Ressler and Bennett Rosenthal (collectively, the "Board Members"). Mr. Ressler generally has veto authority over decisions by the Board Members. (continued in next footnote)

F12 · balance_after: Each of the Reporting Persons, and the Board Members, and the other directors, officers, partners, stockholders, members and managers of the Reporting Persons, expressly disclaims beneficial ownership of the Common Stock, except to the extent of any pecuniary interest therein, and this Form 4 shall not be deemed an admission that any such person or entity is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purposes.

F2 · ownership.nature: This statement is being filed by ACOF VI Frontier AIV A1, L.P. ("ACOF VI Frontier AIV A1"), ACOF VI Frontier AIV A2, L.P. ("ACOF VI Frontier AIV A2"), ACOF VI Frontier AIV A3, L.P. ("ACOF VI Frontier AIV A3"), ACOF VI Frontier AIV A4, L.P. ("ACOF VI Frontier AIV A4"), ACOF VI Frontier AIV A5, L.P. ("ACOF VI Frontier AIV A5"), ACOF VI Frontier AIV A6, L.P. ("ACOF VI Frontier AIV A6"), ACOF VI Frontier AIV A7, L.P. ("ACOF VI Frontier AIV A7"), ACOF VI Frontier AIV A8, L.P. ("ACOF VI Frontier AIV A8"), ACOF VI Frontier AIV A9, L.P. ("ACOF VI Frontier AIV A9"), ACOF VI Frontier AIV A10, L.P. ("ACOF VI Frontier AIV A10"), and ACOF VI Frontier AIV B1, L.P. ("ACOF VI Frontier AIV B1", together with the foregoing entities, the "ACOF Funds"), (continued in next footnote)

F3 · ownership.nature: ASOF Frontier AIV A1, L.P. ("ASOF Frontier AIV A1"), ASOF Frontier AIV A2, L.P. ("ASOF Frontier AIV A2"), ASOF Frontier AIV A3, L.P. ("ASOF Frontier AIV A3"), ASOF Frontier AIV A4, L.P. ("ASOF Frontier AIV A4"), ASOF Frontier AIV A5, L.P. ("ASOF Frontier AIV A5"), ASOF Frontier AIV A6, L.P. ("ASOF Frontier AIV A6"), ASOF Frontier AIV A7, L.P. ("ASOF Frontier AIV A7"), ASOF Frontier AIV A8, L.P. ("ASOF Frontier AIV A8"), ASOF Frontier AIV A9, L.P. ("ASOF Frontier AIV A9"), ASOF Frontier AIV A10, L.P. ("ASOF Frontier AIV A10"), ASOF Frontier AIV A11, L.P. ("ASOF Frontier AIV A11"), (continued in next footnote)

F4 · ownership.nature: and ASOF Frontier AIV B1, L.P. ("ASOF Frontier AIV B1", together with ASOF Frontier AIV A1, ASOF Frontier AIV A2, ASOF Frontier AIV A3, ASOF Frontier AIV A4, ASOF Frontier AIV A5, ASOF Frontier AIV A6, ASOF Frontier AIV A7, ASOF Frontier AIV A8, ASOF Frontier AIV A9, ASOF Frontier AIV A10, and ASOF Frontier AIV A11, the "ASOF Funds"), ASSF IV AIV B Holdings III, L.P. ("ASSF IV AIV B Holdings III"), ASSF IV AIV B, L.P. ("ASSF IV AIV B", and together with ASSF IV AIV B Holdings III, the "ASSF Funds", and together with the ACOF Funds, and the ASOF Funds, the "Ares Direct Holders"), (continued in next footnote)

F5 · ownership.nature: ACOF Investment Management LLC ("ACOF Investment Management"), ASOF Investment Management LLC ("ASOF Investment Management"), ASSF Operating Manager IV, L.P. ("ASSF Operating Manager"), Ares Management LLC, Ares Management Holdings L.P. ("Ares Management Holdings"), Ares Holdco LLC ("Ares Holdco"), Ares Management Corporation ("Ares Management"), Ares Management GP LLC ("Ares Management GP"), Ares Voting LLC ("Ares Voting") and Ares Partners Holdco LLC ("Ares Partners", and together with the Ares Direct Holders, ACOF Investment Management, ASOF Investment Management, ASSF Operating Manager, Ares Management LLC, Ares Management Holdings, Ares Holdco, Ares Management, Ares Management GP, and Ares Voting, the "Reporting Persons"). Due to the electronic system's limitation of 10 Reporting Persons per joint filing, this statement is being filed in four parts.

F6 · ownership.nature: The Reporting Persons collectively beneficially own, or may be deemed to beneficially own, in the aggregate 35,205,125 shares of Common Stock (which aggregate ownership did not change as a result of the Transfers) by reason of the direct or indirect beneficial ownership of such shares as follows: (i) ACOF VI Frontier AIV A1 owns 249,805 shares of Common Stock; (ii) ACOF VI Frontier AIV A2 owns 89,581 shares of Common Stock; (iii) ACOF VI Frontier AIV A3 owns 20,902 shares of Common Stock; (iv) ACOF VI Frontier AIV A4 owns 271,730 shares of Common Stock; (v) ACOF VI Frontier AIV A5 owns 298,604 shares of Common Stock; (vi) ACOF VI Frontier AIV A6 owns 167,219 shares of Common Stock; (vii) ACOF VI Frontier AIV A7 owns 302,616 shares of Common Stock; (viii) ACOF VI Frontier AIV A8 owns shares 303,979 of Common Stock; (continued in next footnote)

F7 · ownership.nature: (ix) ACOF VI Frontier AIV A9 owns 285,466 shares of Common Stock; (x) ACOF VI Frontier AIV A10 owns 90,268 shares of Common Stock; (xi) ACOF VI Frontier AIV B1 owns 15,068,130 shares of Common Stock;(xii) ASOF Frontier AIV A1 owns 105,592 shares of Common Stock; (xiii) ASOF Frontier AIV A2 owns 18,032 shares of Common Stock; (xiv) ASOF Frontier AIV A3 owns 830,837 shares of Common Stock; (xv) ASOF Frontier AIV A4 owns 281,844 shares of Common Stock; (xvi) ASOF Frontier AIV A5 owns 167,160 shares of Common Stock; (xvii) ASOF Frontier AIV A6 owns 292,124 shares of Common Stock; (xviii) ASOF Frontier AIV A7 owns 289,417 shares of Common Stock; (xix) ASOF Frontier AIV A8 owns 238,026 shares of Common Stock; (xx) ASOF Frontier AIV A9 owns 360,644 shares of Common Stock; (xxi) ASOF Frontier AIV A10 owns 259,665 shares of Common Stock; (xxii) ASOF Frontier AIV A11 owns 245,236 shares of Common Stock; (continued in next footnote)

F8 · ownership.nature: (xiii) ASOF Frontier AIV B1 owns 9,597,579 shares of Common Stock; (xxiv) ASSF IV AIV B Holdings III owns 2,694,242 shares of Common Stock; and (xxv) ASSF IV AIV B directly or indirectly owns 2,654,041 shares of Common Stock. Because the aggregate number of shares of Common Stock sold by Ares Direct Holders in the Transfers equals the number of shares of Common Stock purchased by Ares Direct Holders in the Transfers, the total number of shares of Common Stock that Ares Management LLC (as well as ACOF Investment Management, ASOF Investment Management, ASSF Operating Manager, Ares Management Holdings, Ares Holdco, Ares Management Corporation, Ares Management GP, Ares Voting and Ares Partners Holdco), may be deemed to beneficially own did not change as a result of the Transfers.

F9 · ownership.nature: ACOF Investment Management is the manager of the ACOF Funds, ASOF Investment Management is the manager of ASOF Funds, ASSF Operating Manager is the manager of the ASSF Funds. Ares Management LLC is the sole member of ACOF Investment Management and ASOF Investment Management and the general partner of ASSF Operating Manager. Ares Management LLC has direct or indirect power to vote and/or dispose of the shares of Common Stock held by each Ares Direct Holder, and accordingly, Ares Management LLC may be deemed to have beneficial ownership of the shares of Common Stock reported herein. The sole member of Ares Management LLC is Ares Management Holdings and the general partner of Ares Management Holdings is Ares Holdco.

F10 · ownership.nature: The sole member of Ares Holdco is Ares Management. Ares Management GP is the sole holder of the Class B common stock, $0.01 par value per share, of Ares Management (the "Ares Class B Common Stock") and Ares Voting is the sole holder of the Class C common stock, $0.01 par value per share, of Ares Management (the "Ares Class C Common Stock"). (continued in next footnote)

F11 · ownership.nature: Pursuant to Ares Management's Certificate of Incorporation, the holders of the Ares Class B Common Stock and the Ares Class C Common Stock, collectively, will generally have the majority of the votes on any matter submitted to the stockholders of Ares Management if certain conditions are met. The sole member of both Ares Management GP and Ares Voting is Ares Partners. Ares Partners is managed by a board of managers, which is composed of Michael Arougheti, Ryan Berry, R. Kipp deVeer, David Kaplan, Antony Ressler and Bennett Rosenthal (collectively, the "Board Members"). Mr. Ressler generally has veto authority over decisions by the Board Members. (continued in next footnote)

F12 · ownership.nature: Each of the Reporting Persons, and the Board Members, and the other directors, officers, partners, stockholders, members and managers of the Reporting Persons, expressly disclaims beneficial ownership of the Common Stock, except to the extent of any pecuniary interest therein, and this Form 4 shall not be deemed an admission that any such person or entity is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purposes.

SEC source: 0001104659-21-120390 · tm2128492-1_4seq1.xml · nonDerivative · entry 15

ARES MANAGEMENT LLC · CIK 0001259313 · 10% owner

ACOF VI Frontier AIV A1, L.P. · CIK 0001862494 · 10% owner

ACOF VI Frontier AIV A2, L.P. · CIK 0001862499 · 10% owner

ACOF VI Frontier AIV A3, L.P. · CIK 0001862534 · 10% owner

ACOF VI Frontier AIV A4, L.P. · CIK 0001862529 · 10% owner

ACOF VI Frontier AIV A5, L.P. · CIK 0001862526 · 10% owner

ACOF VI Frontier AIV A6, L.P. · CIK 0001862483 · 10% owner

ACOF VI Frontier AIV A7, L.P. · CIK 0001862482 · 10% owner

ACOF VI Frontier AIV A8, L.P. · CIK 0001862505 · 10% owner

ACOF VI Frontier AIV A9, L.P. · CIK 0001862533 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · ACOF VI Frontier AIV A3, L.P.

Disclosed balance after: 20,902

F1 · kind: These transactions reflect inter-fund transfers (the "Transfers") of shares of the Issuer's Common Stock from one Ares Direct Holder (as defined below) to another Ares Direct Holder in connection with an internal rebalancing of such Ares Direct Holders' holdings of Common Stock. Each Transfer occurred at the same time and at the same price.

F2 · balance_after: This statement is being filed by ACOF VI Frontier AIV A1, L.P. ("ACOF VI Frontier AIV A1"), ACOF VI Frontier AIV A2, L.P. ("ACOF VI Frontier AIV A2"), ACOF VI Frontier AIV A3, L.P. ("ACOF VI Frontier AIV A3"), ACOF VI Frontier AIV A4, L.P. ("ACOF VI Frontier AIV A4"), ACOF VI Frontier AIV A5, L.P. ("ACOF VI Frontier AIV A5"), ACOF VI Frontier AIV A6, L.P. ("ACOF VI Frontier AIV A6"), ACOF VI Frontier AIV A7, L.P. ("ACOF VI Frontier AIV A7"), ACOF VI Frontier AIV A8, L.P. ("ACOF VI Frontier AIV A8"), ACOF VI Frontier AIV A9, L.P. ("ACOF VI Frontier AIV A9"), ACOF VI Frontier AIV A10, L.P. ("ACOF VI Frontier AIV A10"), and ACOF VI Frontier AIV B1, L.P. ("ACOF VI Frontier AIV B1", together with the foregoing entities, the "ACOF Funds"), (continued in next footnote)

F3 · balance_after: ASOF Frontier AIV A1, L.P. ("ASOF Frontier AIV A1"), ASOF Frontier AIV A2, L.P. ("ASOF Frontier AIV A2"), ASOF Frontier AIV A3, L.P. ("ASOF Frontier AIV A3"), ASOF Frontier AIV A4, L.P. ("ASOF Frontier AIV A4"), ASOF Frontier AIV A5, L.P. ("ASOF Frontier AIV A5"), ASOF Frontier AIV A6, L.P. ("ASOF Frontier AIV A6"), ASOF Frontier AIV A7, L.P. ("ASOF Frontier AIV A7"), ASOF Frontier AIV A8, L.P. ("ASOF Frontier AIV A8"), ASOF Frontier AIV A9, L.P. ("ASOF Frontier AIV A9"), ASOF Frontier AIV A10, L.P. ("ASOF Frontier AIV A10"), ASOF Frontier AIV A11, L.P. ("ASOF Frontier AIV A11"), (continued in next footnote)

F4 · balance_after: and ASOF Frontier AIV B1, L.P. ("ASOF Frontier AIV B1", together with ASOF Frontier AIV A1, ASOF Frontier AIV A2, ASOF Frontier AIV A3, ASOF Frontier AIV A4, ASOF Frontier AIV A5, ASOF Frontier AIV A6, ASOF Frontier AIV A7, ASOF Frontier AIV A8, ASOF Frontier AIV A9, ASOF Frontier AIV A10, and ASOF Frontier AIV A11, the "ASOF Funds"), ASSF IV AIV B Holdings III, L.P. ("ASSF IV AIV B Holdings III"), ASSF IV AIV B, L.P. ("ASSF IV AIV B", and together with ASSF IV AIV B Holdings III, the "ASSF Funds", and together with the ACOF Funds, and the ASOF Funds, the "Ares Direct Holders"), (continued in next footnote)

F5 · balance_after: ACOF Investment Management LLC ("ACOF Investment Management"), ASOF Investment Management LLC ("ASOF Investment Management"), ASSF Operating Manager IV, L.P. ("ASSF Operating Manager"), Ares Management LLC, Ares Management Holdings L.P. ("Ares Management Holdings"), Ares Holdco LLC ("Ares Holdco"), Ares Management Corporation ("Ares Management"), Ares Management GP LLC ("Ares Management GP"), Ares Voting LLC ("Ares Voting") and Ares Partners Holdco LLC ("Ares Partners", and together with the Ares Direct Holders, ACOF Investment Management, ASOF Investment Management, ASSF Operating Manager, Ares Management LLC, Ares Management Holdings, Ares Holdco, Ares Management, Ares Management GP, and Ares Voting, the "Reporting Persons"). Due to the electronic system's limitation of 10 Reporting Persons per joint filing, this statement is being filed in four parts.

F6 · balance_after: The Reporting Persons collectively beneficially own, or may be deemed to beneficially own, in the aggregate 35,205,125 shares of Common Stock (which aggregate ownership did not change as a result of the Transfers) by reason of the direct or indirect beneficial ownership of such shares as follows: (i) ACOF VI Frontier AIV A1 owns 249,805 shares of Common Stock; (ii) ACOF VI Frontier AIV A2 owns 89,581 shares of Common Stock; (iii) ACOF VI Frontier AIV A3 owns 20,902 shares of Common Stock; (iv) ACOF VI Frontier AIV A4 owns 271,730 shares of Common Stock; (v) ACOF VI Frontier AIV A5 owns 298,604 shares of Common Stock; (vi) ACOF VI Frontier AIV A6 owns 167,219 shares of Common Stock; (vii) ACOF VI Frontier AIV A7 owns 302,616 shares of Common Stock; (viii) ACOF VI Frontier AIV A8 owns shares 303,979 of Common Stock; (continued in next footnote)

F7 · balance_after: (ix) ACOF VI Frontier AIV A9 owns 285,466 shares of Common Stock; (x) ACOF VI Frontier AIV A10 owns 90,268 shares of Common Stock; (xi) ACOF VI Frontier AIV B1 owns 15,068,130 shares of Common Stock;(xii) ASOF Frontier AIV A1 owns 105,592 shares of Common Stock; (xiii) ASOF Frontier AIV A2 owns 18,032 shares of Common Stock; (xiv) ASOF Frontier AIV A3 owns 830,837 shares of Common Stock; (xv) ASOF Frontier AIV A4 owns 281,844 shares of Common Stock; (xvi) ASOF Frontier AIV A5 owns 167,160 shares of Common Stock; (xvii) ASOF Frontier AIV A6 owns 292,124 shares of Common Stock; (xviii) ASOF Frontier AIV A7 owns 289,417 shares of Common Stock; (xix) ASOF Frontier AIV A8 owns 238,026 shares of Common Stock; (xx) ASOF Frontier AIV A9 owns 360,644 shares of Common Stock; (xxi) ASOF Frontier AIV A10 owns 259,665 shares of Common Stock; (xxii) ASOF Frontier AIV A11 owns 245,236 shares of Common Stock; (continued in next footnote)

F8 · balance_after: (xiii) ASOF Frontier AIV B1 owns 9,597,579 shares of Common Stock; (xxiv) ASSF IV AIV B Holdings III owns 2,694,242 shares of Common Stock; and (xxv) ASSF IV AIV B directly or indirectly owns 2,654,041 shares of Common Stock. Because the aggregate number of shares of Common Stock sold by Ares Direct Holders in the Transfers equals the number of shares of Common Stock purchased by Ares Direct Holders in the Transfers, the total number of shares of Common Stock that Ares Management LLC (as well as ACOF Investment Management, ASOF Investment Management, ASSF Operating Manager, Ares Management Holdings, Ares Holdco, Ares Management Corporation, Ares Management GP, Ares Voting and Ares Partners Holdco), may be deemed to beneficially own did not change as a result of the Transfers.

F9 · balance_after: ACOF Investment Management is the manager of the ACOF Funds, ASOF Investment Management is the manager of ASOF Funds, ASSF Operating Manager is the manager of the ASSF Funds. Ares Management LLC is the sole member of ACOF Investment Management and ASOF Investment Management and the general partner of ASSF Operating Manager. Ares Management LLC has direct or indirect power to vote and/or dispose of the shares of Common Stock held by each Ares Direct Holder, and accordingly, Ares Management LLC may be deemed to have beneficial ownership of the shares of Common Stock reported herein. The sole member of Ares Management LLC is Ares Management Holdings and the general partner of Ares Management Holdings is Ares Holdco.

F10 · balance_after: The sole member of Ares Holdco is Ares Management. Ares Management GP is the sole holder of the Class B common stock, $0.01 par value per share, of Ares Management (the "Ares Class B Common Stock") and Ares Voting is the sole holder of the Class C common stock, $0.01 par value per share, of Ares Management (the "Ares Class C Common Stock"). (continued in next footnote)

F11 · balance_after: Pursuant to Ares Management's Certificate of Incorporation, the holders of the Ares Class B Common Stock and the Ares Class C Common Stock, collectively, will generally have the majority of the votes on any matter submitted to the stockholders of Ares Management if certain conditions are met. The sole member of both Ares Management GP and Ares Voting is Ares Partners. Ares Partners is managed by a board of managers, which is composed of Michael Arougheti, Ryan Berry, R. Kipp deVeer, David Kaplan, Antony Ressler and Bennett Rosenthal (collectively, the "Board Members"). Mr. Ressler generally has veto authority over decisions by the Board Members. (continued in next footnote)

F12 · balance_after: Each of the Reporting Persons, and the Board Members, and the other directors, officers, partners, stockholders, members and managers of the Reporting Persons, expressly disclaims beneficial ownership of the Common Stock, except to the extent of any pecuniary interest therein, and this Form 4 shall not be deemed an admission that any such person or entity is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purposes.

F2 · ownership.nature: This statement is being filed by ACOF VI Frontier AIV A1, L.P. ("ACOF VI Frontier AIV A1"), ACOF VI Frontier AIV A2, L.P. ("ACOF VI Frontier AIV A2"), ACOF VI Frontier AIV A3, L.P. ("ACOF VI Frontier AIV A3"), ACOF VI Frontier AIV A4, L.P. ("ACOF VI Frontier AIV A4"), ACOF VI Frontier AIV A5, L.P. ("ACOF VI Frontier AIV A5"), ACOF VI Frontier AIV A6, L.P. ("ACOF VI Frontier AIV A6"), ACOF VI Frontier AIV A7, L.P. ("ACOF VI Frontier AIV A7"), ACOF VI Frontier AIV A8, L.P. ("ACOF VI Frontier AIV A8"), ACOF VI Frontier AIV A9, L.P. ("ACOF VI Frontier AIV A9"), ACOF VI Frontier AIV A10, L.P. ("ACOF VI Frontier AIV A10"), and ACOF VI Frontier AIV B1, L.P. ("ACOF VI Frontier AIV B1", together with the foregoing entities, the "ACOF Funds"), (continued in next footnote)

F3 · ownership.nature: ASOF Frontier AIV A1, L.P. ("ASOF Frontier AIV A1"), ASOF Frontier AIV A2, L.P. ("ASOF Frontier AIV A2"), ASOF Frontier AIV A3, L.P. ("ASOF Frontier AIV A3"), ASOF Frontier AIV A4, L.P. ("ASOF Frontier AIV A4"), ASOF Frontier AIV A5, L.P. ("ASOF Frontier AIV A5"), ASOF Frontier AIV A6, L.P. ("ASOF Frontier AIV A6"), ASOF Frontier AIV A7, L.P. ("ASOF Frontier AIV A7"), ASOF Frontier AIV A8, L.P. ("ASOF Frontier AIV A8"), ASOF Frontier AIV A9, L.P. ("ASOF Frontier AIV A9"), ASOF Frontier AIV A10, L.P. ("ASOF Frontier AIV A10"), ASOF Frontier AIV A11, L.P. ("ASOF Frontier AIV A11"), (continued in next footnote)

F4 · ownership.nature: and ASOF Frontier AIV B1, L.P. ("ASOF Frontier AIV B1", together with ASOF Frontier AIV A1, ASOF Frontier AIV A2, ASOF Frontier AIV A3, ASOF Frontier AIV A4, ASOF Frontier AIV A5, ASOF Frontier AIV A6, ASOF Frontier AIV A7, ASOF Frontier AIV A8, ASOF Frontier AIV A9, ASOF Frontier AIV A10, and ASOF Frontier AIV A11, the "ASOF Funds"), ASSF IV AIV B Holdings III, L.P. ("ASSF IV AIV B Holdings III"), ASSF IV AIV B, L.P. ("ASSF IV AIV B", and together with ASSF IV AIV B Holdings III, the "ASSF Funds", and together with the ACOF Funds, and the ASOF Funds, the "Ares Direct Holders"), (continued in next footnote)

F5 · ownership.nature: ACOF Investment Management LLC ("ACOF Investment Management"), ASOF Investment Management LLC ("ASOF Investment Management"), ASSF Operating Manager IV, L.P. ("ASSF Operating Manager"), Ares Management LLC, Ares Management Holdings L.P. ("Ares Management Holdings"), Ares Holdco LLC ("Ares Holdco"), Ares Management Corporation ("Ares Management"), Ares Management GP LLC ("Ares Management GP"), Ares Voting LLC ("Ares Voting") and Ares Partners Holdco LLC ("Ares Partners", and together with the Ares Direct Holders, ACOF Investment Management, ASOF Investment Management, ASSF Operating Manager, Ares Management LLC, Ares Management Holdings, Ares Holdco, Ares Management, Ares Management GP, and Ares Voting, the "Reporting Persons"). Due to the electronic system's limitation of 10 Reporting Persons per joint filing, this statement is being filed in four parts.

F6 · ownership.nature: The Reporting Persons collectively beneficially own, or may be deemed to beneficially own, in the aggregate 35,205,125 shares of Common Stock (which aggregate ownership did not change as a result of the Transfers) by reason of the direct or indirect beneficial ownership of such shares as follows: (i) ACOF VI Frontier AIV A1 owns 249,805 shares of Common Stock; (ii) ACOF VI Frontier AIV A2 owns 89,581 shares of Common Stock; (iii) ACOF VI Frontier AIV A3 owns 20,902 shares of Common Stock; (iv) ACOF VI Frontier AIV A4 owns 271,730 shares of Common Stock; (v) ACOF VI Frontier AIV A5 owns 298,604 shares of Common Stock; (vi) ACOF VI Frontier AIV A6 owns 167,219 shares of Common Stock; (vii) ACOF VI Frontier AIV A7 owns 302,616 shares of Common Stock; (viii) ACOF VI Frontier AIV A8 owns shares 303,979 of Common Stock; (continued in next footnote)

F7 · ownership.nature: (ix) ACOF VI Frontier AIV A9 owns 285,466 shares of Common Stock; (x) ACOF VI Frontier AIV A10 owns 90,268 shares of Common Stock; (xi) ACOF VI Frontier AIV B1 owns 15,068,130 shares of Common Stock;(xii) ASOF Frontier AIV A1 owns 105,592 shares of Common Stock; (xiii) ASOF Frontier AIV A2 owns 18,032 shares of Common Stock; (xiv) ASOF Frontier AIV A3 owns 830,837 shares of Common Stock; (xv) ASOF Frontier AIV A4 owns 281,844 shares of Common Stock; (xvi) ASOF Frontier AIV A5 owns 167,160 shares of Common Stock; (xvii) ASOF Frontier AIV A6 owns 292,124 shares of Common Stock; (xviii) ASOF Frontier AIV A7 owns 289,417 shares of Common Stock; (xix) ASOF Frontier AIV A8 owns 238,026 shares of Common Stock; (xx) ASOF Frontier AIV A9 owns 360,644 shares of Common Stock; (xxi) ASOF Frontier AIV A10 owns 259,665 shares of Common Stock; (xxii) ASOF Frontier AIV A11 owns 245,236 shares of Common Stock; (continued in next footnote)

F8 · ownership.nature: (xiii) ASOF Frontier AIV B1 owns 9,597,579 shares of Common Stock; (xxiv) ASSF IV AIV B Holdings III owns 2,694,242 shares of Common Stock; and (xxv) ASSF IV AIV B directly or indirectly owns 2,654,041 shares of Common Stock. Because the aggregate number of shares of Common Stock sold by Ares Direct Holders in the Transfers equals the number of shares of Common Stock purchased by Ares Direct Holders in the Transfers, the total number of shares of Common Stock that Ares Management LLC (as well as ACOF Investment Management, ASOF Investment Management, ASSF Operating Manager, Ares Management Holdings, Ares Holdco, Ares Management Corporation, Ares Management GP, Ares Voting and Ares Partners Holdco), may be deemed to beneficially own did not change as a result of the Transfers.

F9 · ownership.nature: ACOF Investment Management is the manager of the ACOF Funds, ASOF Investment Management is the manager of ASOF Funds, ASSF Operating Manager is the manager of the ASSF Funds. Ares Management LLC is the sole member of ACOF Investment Management and ASOF Investment Management and the general partner of ASSF Operating Manager. Ares Management LLC has direct or indirect power to vote and/or dispose of the shares of Common Stock held by each Ares Direct Holder, and accordingly, Ares Management LLC may be deemed to have beneficial ownership of the shares of Common Stock reported herein. The sole member of Ares Management LLC is Ares Management Holdings and the general partner of Ares Management Holdings is Ares Holdco.

F10 · ownership.nature: The sole member of Ares Holdco is Ares Management. Ares Management GP is the sole holder of the Class B common stock, $0.01 par value per share, of Ares Management (the "Ares Class B Common Stock") and Ares Voting is the sole holder of the Class C common stock, $0.01 par value per share, of Ares Management (the "Ares Class C Common Stock"). (continued in next footnote)

F11 · ownership.nature: Pursuant to Ares Management's Certificate of Incorporation, the holders of the Ares Class B Common Stock and the Ares Class C Common Stock, collectively, will generally have the majority of the votes on any matter submitted to the stockholders of Ares Management if certain conditions are met. The sole member of both Ares Management GP and Ares Voting is Ares Partners. Ares Partners is managed by a board of managers, which is composed of Michael Arougheti, Ryan Berry, R. Kipp deVeer, David Kaplan, Antony Ressler and Bennett Rosenthal (collectively, the "Board Members"). Mr. Ressler generally has veto authority over decisions by the Board Members. (continued in next footnote)

F12 · ownership.nature: Each of the Reporting Persons, and the Board Members, and the other directors, officers, partners, stockholders, members and managers of the Reporting Persons, expressly disclaims beneficial ownership of the Common Stock, except to the extent of any pecuniary interest therein, and this Form 4 shall not be deemed an admission that any such person or entity is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purposes.

SEC source: 0001104659-21-120390 · tm2128492-1_4seq1.xml · nonDerivative · entry 14

ARES MANAGEMENT LLC · CIK 0001259313 · 10% owner

ACOF VI Frontier AIV A1, L.P. · CIK 0001862494 · 10% owner

ACOF VI Frontier AIV A2, L.P. · CIK 0001862499 · 10% owner

ACOF VI Frontier AIV A3, L.P. · CIK 0001862534 · 10% owner

ACOF VI Frontier AIV A4, L.P. · CIK 0001862529 · 10% owner

ACOF VI Frontier AIV A5, L.P. · CIK 0001862526 · 10% owner

ACOF VI Frontier AIV A6, L.P. · CIK 0001862483 · 10% owner

ACOF VI Frontier AIV A7, L.P. · CIK 0001862482 · 10% owner

ACOF VI Frontier AIV A8, L.P. · CIK 0001862505 · 10% owner

ACOF VI Frontier AIV A9, L.P. · CIK 0001862533 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · ACOF VI Frontier AIV A2, L.P.

Disclosed balance after: 89,581

F1 · kind: These transactions reflect inter-fund transfers (the "Transfers") of shares of the Issuer's Common Stock from one Ares Direct Holder (as defined below) to another Ares Direct Holder in connection with an internal rebalancing of such Ares Direct Holders' holdings of Common Stock. Each Transfer occurred at the same time and at the same price.

F2 · balance_after: This statement is being filed by ACOF VI Frontier AIV A1, L.P. ("ACOF VI Frontier AIV A1"), ACOF VI Frontier AIV A2, L.P. ("ACOF VI Frontier AIV A2"), ACOF VI Frontier AIV A3, L.P. ("ACOF VI Frontier AIV A3"), ACOF VI Frontier AIV A4, L.P. ("ACOF VI Frontier AIV A4"), ACOF VI Frontier AIV A5, L.P. ("ACOF VI Frontier AIV A5"), ACOF VI Frontier AIV A6, L.P. ("ACOF VI Frontier AIV A6"), ACOF VI Frontier AIV A7, L.P. ("ACOF VI Frontier AIV A7"), ACOF VI Frontier AIV A8, L.P. ("ACOF VI Frontier AIV A8"), ACOF VI Frontier AIV A9, L.P. ("ACOF VI Frontier AIV A9"), ACOF VI Frontier AIV A10, L.P. ("ACOF VI Frontier AIV A10"), and ACOF VI Frontier AIV B1, L.P. ("ACOF VI Frontier AIV B1", together with the foregoing entities, the "ACOF Funds"), (continued in next footnote)

F3 · balance_after: ASOF Frontier AIV A1, L.P. ("ASOF Frontier AIV A1"), ASOF Frontier AIV A2, L.P. ("ASOF Frontier AIV A2"), ASOF Frontier AIV A3, L.P. ("ASOF Frontier AIV A3"), ASOF Frontier AIV A4, L.P. ("ASOF Frontier AIV A4"), ASOF Frontier AIV A5, L.P. ("ASOF Frontier AIV A5"), ASOF Frontier AIV A6, L.P. ("ASOF Frontier AIV A6"), ASOF Frontier AIV A7, L.P. ("ASOF Frontier AIV A7"), ASOF Frontier AIV A8, L.P. ("ASOF Frontier AIV A8"), ASOF Frontier AIV A9, L.P. ("ASOF Frontier AIV A9"), ASOF Frontier AIV A10, L.P. ("ASOF Frontier AIV A10"), ASOF Frontier AIV A11, L.P. ("ASOF Frontier AIV A11"), (continued in next footnote)

F4 · balance_after: and ASOF Frontier AIV B1, L.P. ("ASOF Frontier AIV B1", together with ASOF Frontier AIV A1, ASOF Frontier AIV A2, ASOF Frontier AIV A3, ASOF Frontier AIV A4, ASOF Frontier AIV A5, ASOF Frontier AIV A6, ASOF Frontier AIV A7, ASOF Frontier AIV A8, ASOF Frontier AIV A9, ASOF Frontier AIV A10, and ASOF Frontier AIV A11, the "ASOF Funds"), ASSF IV AIV B Holdings III, L.P. ("ASSF IV AIV B Holdings III"), ASSF IV AIV B, L.P. ("ASSF IV AIV B", and together with ASSF IV AIV B Holdings III, the "ASSF Funds", and together with the ACOF Funds, and the ASOF Funds, the "Ares Direct Holders"), (continued in next footnote)

F5 · balance_after: ACOF Investment Management LLC ("ACOF Investment Management"), ASOF Investment Management LLC ("ASOF Investment Management"), ASSF Operating Manager IV, L.P. ("ASSF Operating Manager"), Ares Management LLC, Ares Management Holdings L.P. ("Ares Management Holdings"), Ares Holdco LLC ("Ares Holdco"), Ares Management Corporation ("Ares Management"), Ares Management GP LLC ("Ares Management GP"), Ares Voting LLC ("Ares Voting") and Ares Partners Holdco LLC ("Ares Partners", and together with the Ares Direct Holders, ACOF Investment Management, ASOF Investment Management, ASSF Operating Manager, Ares Management LLC, Ares Management Holdings, Ares Holdco, Ares Management, Ares Management GP, and Ares Voting, the "Reporting Persons"). Due to the electronic system's limitation of 10 Reporting Persons per joint filing, this statement is being filed in four parts.

F6 · balance_after: The Reporting Persons collectively beneficially own, or may be deemed to beneficially own, in the aggregate 35,205,125 shares of Common Stock (which aggregate ownership did not change as a result of the Transfers) by reason of the direct or indirect beneficial ownership of such shares as follows: (i) ACOF VI Frontier AIV A1 owns 249,805 shares of Common Stock; (ii) ACOF VI Frontier AIV A2 owns 89,581 shares of Common Stock; (iii) ACOF VI Frontier AIV A3 owns 20,902 shares of Common Stock; (iv) ACOF VI Frontier AIV A4 owns 271,730 shares of Common Stock; (v) ACOF VI Frontier AIV A5 owns 298,604 shares of Common Stock; (vi) ACOF VI Frontier AIV A6 owns 167,219 shares of Common Stock; (vii) ACOF VI Frontier AIV A7 owns 302,616 shares of Common Stock; (viii) ACOF VI Frontier AIV A8 owns shares 303,979 of Common Stock; (continued in next footnote)

F7 · balance_after: (ix) ACOF VI Frontier AIV A9 owns 285,466 shares of Common Stock; (x) ACOF VI Frontier AIV A10 owns 90,268 shares of Common Stock; (xi) ACOF VI Frontier AIV B1 owns 15,068,130 shares of Common Stock;(xii) ASOF Frontier AIV A1 owns 105,592 shares of Common Stock; (xiii) ASOF Frontier AIV A2 owns 18,032 shares of Common Stock; (xiv) ASOF Frontier AIV A3 owns 830,837 shares of Common Stock; (xv) ASOF Frontier AIV A4 owns 281,844 shares of Common Stock; (xvi) ASOF Frontier AIV A5 owns 167,160 shares of Common Stock; (xvii) ASOF Frontier AIV A6 owns 292,124 shares of Common Stock; (xviii) ASOF Frontier AIV A7 owns 289,417 shares of Common Stock; (xix) ASOF Frontier AIV A8 owns 238,026 shares of Common Stock; (xx) ASOF Frontier AIV A9 owns 360,644 shares of Common Stock; (xxi) ASOF Frontier AIV A10 owns 259,665 shares of Common Stock; (xxii) ASOF Frontier AIV A11 owns 245,236 shares of Common Stock; (continued in next footnote)

F8 · balance_after: (xiii) ASOF Frontier AIV B1 owns 9,597,579 shares of Common Stock; (xxiv) ASSF IV AIV B Holdings III owns 2,694,242 shares of Common Stock; and (xxv) ASSF IV AIV B directly or indirectly owns 2,654,041 shares of Common Stock. Because the aggregate number of shares of Common Stock sold by Ares Direct Holders in the Transfers equals the number of shares of Common Stock purchased by Ares Direct Holders in the Transfers, the total number of shares of Common Stock that Ares Management LLC (as well as ACOF Investment Management, ASOF Investment Management, ASSF Operating Manager, Ares Management Holdings, Ares Holdco, Ares Management Corporation, Ares Management GP, Ares Voting and Ares Partners Holdco), may be deemed to beneficially own did not change as a result of the Transfers.

F9 · balance_after: ACOF Investment Management is the manager of the ACOF Funds, ASOF Investment Management is the manager of ASOF Funds, ASSF Operating Manager is the manager of the ASSF Funds. Ares Management LLC is the sole member of ACOF Investment Management and ASOF Investment Management and the general partner of ASSF Operating Manager. Ares Management LLC has direct or indirect power to vote and/or dispose of the shares of Common Stock held by each Ares Direct Holder, and accordingly, Ares Management LLC may be deemed to have beneficial ownership of the shares of Common Stock reported herein. The sole member of Ares Management LLC is Ares Management Holdings and the general partner of Ares Management Holdings is Ares Holdco.

F10 · balance_after: The sole member of Ares Holdco is Ares Management. Ares Management GP is the sole holder of the Class B common stock, $0.01 par value per share, of Ares Management (the "Ares Class B Common Stock") and Ares Voting is the sole holder of the Class C common stock, $0.01 par value per share, of Ares Management (the "Ares Class C Common Stock"). (continued in next footnote)

F11 · balance_after: Pursuant to Ares Management's Certificate of Incorporation, the holders of the Ares Class B Common Stock and the Ares Class C Common Stock, collectively, will generally have the majority of the votes on any matter submitted to the stockholders of Ares Management if certain conditions are met. The sole member of both Ares Management GP and Ares Voting is Ares Partners. Ares Partners is managed by a board of managers, which is composed of Michael Arougheti, Ryan Berry, R. Kipp deVeer, David Kaplan, Antony Ressler and Bennett Rosenthal (collectively, the "Board Members"). Mr. Ressler generally has veto authority over decisions by the Board Members. (continued in next footnote)

F12 · balance_after: Each of the Reporting Persons, and the Board Members, and the other directors, officers, partners, stockholders, members and managers of the Reporting Persons, expressly disclaims beneficial ownership of the Common Stock, except to the extent of any pecuniary interest therein, and this Form 4 shall not be deemed an admission that any such person or entity is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purposes.

F2 · ownership.nature: This statement is being filed by ACOF VI Frontier AIV A1, L.P. ("ACOF VI Frontier AIV A1"), ACOF VI Frontier AIV A2, L.P. ("ACOF VI Frontier AIV A2"), ACOF VI Frontier AIV A3, L.P. ("ACOF VI Frontier AIV A3"), ACOF VI Frontier AIV A4, L.P. ("ACOF VI Frontier AIV A4"), ACOF VI Frontier AIV A5, L.P. ("ACOF VI Frontier AIV A5"), ACOF VI Frontier AIV A6, L.P. ("ACOF VI Frontier AIV A6"), ACOF VI Frontier AIV A7, L.P. ("ACOF VI Frontier AIV A7"), ACOF VI Frontier AIV A8, L.P. ("ACOF VI Frontier AIV A8"), ACOF VI Frontier AIV A9, L.P. ("ACOF VI Frontier AIV A9"), ACOF VI Frontier AIV A10, L.P. ("ACOF VI Frontier AIV A10"), and ACOF VI Frontier AIV B1, L.P. ("ACOF VI Frontier AIV B1", together with the foregoing entities, the "ACOF Funds"), (continued in next footnote)

F3 · ownership.nature: ASOF Frontier AIV A1, L.P. ("ASOF Frontier AIV A1"), ASOF Frontier AIV A2, L.P. ("ASOF Frontier AIV A2"), ASOF Frontier AIV A3, L.P. ("ASOF Frontier AIV A3"), ASOF Frontier AIV A4, L.P. ("ASOF Frontier AIV A4"), ASOF Frontier AIV A5, L.P. ("ASOF Frontier AIV A5"), ASOF Frontier AIV A6, L.P. ("ASOF Frontier AIV A6"), ASOF Frontier AIV A7, L.P. ("ASOF Frontier AIV A7"), ASOF Frontier AIV A8, L.P. ("ASOF Frontier AIV A8"), ASOF Frontier AIV A9, L.P. ("ASOF Frontier AIV A9"), ASOF Frontier AIV A10, L.P. ("ASOF Frontier AIV A10"), ASOF Frontier AIV A11, L.P. ("ASOF Frontier AIV A11"), (continued in next footnote)

F4 · ownership.nature: and ASOF Frontier AIV B1, L.P. ("ASOF Frontier AIV B1", together with ASOF Frontier AIV A1, ASOF Frontier AIV A2, ASOF Frontier AIV A3, ASOF Frontier AIV A4, ASOF Frontier AIV A5, ASOF Frontier AIV A6, ASOF Frontier AIV A7, ASOF Frontier AIV A8, ASOF Frontier AIV A9, ASOF Frontier AIV A10, and ASOF Frontier AIV A11, the "ASOF Funds"), ASSF IV AIV B Holdings III, L.P. ("ASSF IV AIV B Holdings III"), ASSF IV AIV B, L.P. ("ASSF IV AIV B", and together with ASSF IV AIV B Holdings III, the "ASSF Funds", and together with the ACOF Funds, and the ASOF Funds, the "Ares Direct Holders"), (continued in next footnote)

F5 · ownership.nature: ACOF Investment Management LLC ("ACOF Investment Management"), ASOF Investment Management LLC ("ASOF Investment Management"), ASSF Operating Manager IV, L.P. ("ASSF Operating Manager"), Ares Management LLC, Ares Management Holdings L.P. ("Ares Management Holdings"), Ares Holdco LLC ("Ares Holdco"), Ares Management Corporation ("Ares Management"), Ares Management GP LLC ("Ares Management GP"), Ares Voting LLC ("Ares Voting") and Ares Partners Holdco LLC ("Ares Partners", and together with the Ares Direct Holders, ACOF Investment Management, ASOF Investment Management, ASSF Operating Manager, Ares Management LLC, Ares Management Holdings, Ares Holdco, Ares Management, Ares Management GP, and Ares Voting, the "Reporting Persons"). Due to the electronic system's limitation of 10 Reporting Persons per joint filing, this statement is being filed in four parts.

F6 · ownership.nature: The Reporting Persons collectively beneficially own, or may be deemed to beneficially own, in the aggregate 35,205,125 shares of Common Stock (which aggregate ownership did not change as a result of the Transfers) by reason of the direct or indirect beneficial ownership of such shares as follows: (i) ACOF VI Frontier AIV A1 owns 249,805 shares of Common Stock; (ii) ACOF VI Frontier AIV A2 owns 89,581 shares of Common Stock; (iii) ACOF VI Frontier AIV A3 owns 20,902 shares of Common Stock; (iv) ACOF VI Frontier AIV A4 owns 271,730 shares of Common Stock; (v) ACOF VI Frontier AIV A5 owns 298,604 shares of Common Stock; (vi) ACOF VI Frontier AIV A6 owns 167,219 shares of Common Stock; (vii) ACOF VI Frontier AIV A7 owns 302,616 shares of Common Stock; (viii) ACOF VI Frontier AIV A8 owns shares 303,979 of Common Stock; (continued in next footnote)

F7 · ownership.nature: (ix) ACOF VI Frontier AIV A9 owns 285,466 shares of Common Stock; (x) ACOF VI Frontier AIV A10 owns 90,268 shares of Common Stock; (xi) ACOF VI Frontier AIV B1 owns 15,068,130 shares of Common Stock;(xii) ASOF Frontier AIV A1 owns 105,592 shares of Common Stock; (xiii) ASOF Frontier AIV A2 owns 18,032 shares of Common Stock; (xiv) ASOF Frontier AIV A3 owns 830,837 shares of Common Stock; (xv) ASOF Frontier AIV A4 owns 281,844 shares of Common Stock; (xvi) ASOF Frontier AIV A5 owns 167,160 shares of Common Stock; (xvii) ASOF Frontier AIV A6 owns 292,124 shares of Common Stock; (xviii) ASOF Frontier AIV A7 owns 289,417 shares of Common Stock; (xix) ASOF Frontier AIV A8 owns 238,026 shares of Common Stock; (xx) ASOF Frontier AIV A9 owns 360,644 shares of Common Stock; (xxi) ASOF Frontier AIV A10 owns 259,665 shares of Common Stock; (xxii) ASOF Frontier AIV A11 owns 245,236 shares of Common Stock; (continued in next footnote)

F8 · ownership.nature: (xiii) ASOF Frontier AIV B1 owns 9,597,579 shares of Common Stock; (xxiv) ASSF IV AIV B Holdings III owns 2,694,242 shares of Common Stock; and (xxv) ASSF IV AIV B directly or indirectly owns 2,654,041 shares of Common Stock. Because the aggregate number of shares of Common Stock sold by Ares Direct Holders in the Transfers equals the number of shares of Common Stock purchased by Ares Direct Holders in the Transfers, the total number of shares of Common Stock that Ares Management LLC (as well as ACOF Investment Management, ASOF Investment Management, ASSF Operating Manager, Ares Management Holdings, Ares Holdco, Ares Management Corporation, Ares Management GP, Ares Voting and Ares Partners Holdco), may be deemed to beneficially own did not change as a result of the Transfers.

F9 · ownership.nature: ACOF Investment Management is the manager of the ACOF Funds, ASOF Investment Management is the manager of ASOF Funds, ASSF Operating Manager is the manager of the ASSF Funds. Ares Management LLC is the sole member of ACOF Investment Management and ASOF Investment Management and the general partner of ASSF Operating Manager. Ares Management LLC has direct or indirect power to vote and/or dispose of the shares of Common Stock held by each Ares Direct Holder, and accordingly, Ares Management LLC may be deemed to have beneficial ownership of the shares of Common Stock reported herein. The sole member of Ares Management LLC is Ares Management Holdings and the general partner of Ares Management Holdings is Ares Holdco.

F10 · ownership.nature: The sole member of Ares Holdco is Ares Management. Ares Management GP is the sole holder of the Class B common stock, $0.01 par value per share, of Ares Management (the "Ares Class B Common Stock") and Ares Voting is the sole holder of the Class C common stock, $0.01 par value per share, of Ares Management (the "Ares Class C Common Stock"). (continued in next footnote)

F11 · ownership.nature: Pursuant to Ares Management's Certificate of Incorporation, the holders of the Ares Class B Common Stock and the Ares Class C Common Stock, collectively, will generally have the majority of the votes on any matter submitted to the stockholders of Ares Management if certain conditions are met. The sole member of both Ares Management GP and Ares Voting is Ares Partners. Ares Partners is managed by a board of managers, which is composed of Michael Arougheti, Ryan Berry, R. Kipp deVeer, David Kaplan, Antony Ressler and Bennett Rosenthal (collectively, the "Board Members"). Mr. Ressler generally has veto authority over decisions by the Board Members. (continued in next footnote)

F12 · ownership.nature: Each of the Reporting Persons, and the Board Members, and the other directors, officers, partners, stockholders, members and managers of the Reporting Persons, expressly disclaims beneficial ownership of the Common Stock, except to the extent of any pecuniary interest therein, and this Form 4 shall not be deemed an admission that any such person or entity is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purposes.

SEC source: 0001104659-21-120390 · tm2128492-1_4seq1.xml · nonDerivative · entry 13

ARES MANAGEMENT LLC · CIK 0001259313 · 10% owner

ACOF VI Frontier AIV A1, L.P. · CIK 0001862494 · 10% owner

ACOF VI Frontier AIV A2, L.P. · CIK 0001862499 · 10% owner

ACOF VI Frontier AIV A3, L.P. · CIK 0001862534 · 10% owner

ACOF VI Frontier AIV A4, L.P. · CIK 0001862529 · 10% owner

ACOF VI Frontier AIV A5, L.P. · CIK 0001862526 · 10% owner

ACOF VI Frontier AIV A6, L.P. · CIK 0001862483 · 10% owner

ACOF VI Frontier AIV A7, L.P. · CIK 0001862482 · 10% owner

ACOF VI Frontier AIV A8, L.P. · CIK 0001862505 · 10% owner

ACOF VI Frontier AIV A9, L.P. · CIK 0001862533 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · ACOF VI Frontier AIV A1, L.P.

Disclosed balance after: 249,805

F1 · kind: These transactions reflect inter-fund transfers (the "Transfers") of shares of the Issuer's Common Stock from one Ares Direct Holder (as defined below) to another Ares Direct Holder in connection with an internal rebalancing of such Ares Direct Holders' holdings of Common Stock. Each Transfer occurred at the same time and at the same price.

F2 · balance_after: This statement is being filed by ACOF VI Frontier AIV A1, L.P. ("ACOF VI Frontier AIV A1"), ACOF VI Frontier AIV A2, L.P. ("ACOF VI Frontier AIV A2"), ACOF VI Frontier AIV A3, L.P. ("ACOF VI Frontier AIV A3"), ACOF VI Frontier AIV A4, L.P. ("ACOF VI Frontier AIV A4"), ACOF VI Frontier AIV A5, L.P. ("ACOF VI Frontier AIV A5"), ACOF VI Frontier AIV A6, L.P. ("ACOF VI Frontier AIV A6"), ACOF VI Frontier AIV A7, L.P. ("ACOF VI Frontier AIV A7"), ACOF VI Frontier AIV A8, L.P. ("ACOF VI Frontier AIV A8"), ACOF VI Frontier AIV A9, L.P. ("ACOF VI Frontier AIV A9"), ACOF VI Frontier AIV A10, L.P. ("ACOF VI Frontier AIV A10"), and ACOF VI Frontier AIV B1, L.P. ("ACOF VI Frontier AIV B1", together with the foregoing entities, the "ACOF Funds"), (continued in next footnote)

F3 · balance_after: ASOF Frontier AIV A1, L.P. ("ASOF Frontier AIV A1"), ASOF Frontier AIV A2, L.P. ("ASOF Frontier AIV A2"), ASOF Frontier AIV A3, L.P. ("ASOF Frontier AIV A3"), ASOF Frontier AIV A4, L.P. ("ASOF Frontier AIV A4"), ASOF Frontier AIV A5, L.P. ("ASOF Frontier AIV A5"), ASOF Frontier AIV A6, L.P. ("ASOF Frontier AIV A6"), ASOF Frontier AIV A7, L.P. ("ASOF Frontier AIV A7"), ASOF Frontier AIV A8, L.P. ("ASOF Frontier AIV A8"), ASOF Frontier AIV A9, L.P. ("ASOF Frontier AIV A9"), ASOF Frontier AIV A10, L.P. ("ASOF Frontier AIV A10"), ASOF Frontier AIV A11, L.P. ("ASOF Frontier AIV A11"), (continued in next footnote)

F4 · balance_after: and ASOF Frontier AIV B1, L.P. ("ASOF Frontier AIV B1", together with ASOF Frontier AIV A1, ASOF Frontier AIV A2, ASOF Frontier AIV A3, ASOF Frontier AIV A4, ASOF Frontier AIV A5, ASOF Frontier AIV A6, ASOF Frontier AIV A7, ASOF Frontier AIV A8, ASOF Frontier AIV A9, ASOF Frontier AIV A10, and ASOF Frontier AIV A11, the "ASOF Funds"), ASSF IV AIV B Holdings III, L.P. ("ASSF IV AIV B Holdings III"), ASSF IV AIV B, L.P. ("ASSF IV AIV B", and together with ASSF IV AIV B Holdings III, the "ASSF Funds", and together with the ACOF Funds, and the ASOF Funds, the "Ares Direct Holders"), (continued in next footnote)

F5 · balance_after: ACOF Investment Management LLC ("ACOF Investment Management"), ASOF Investment Management LLC ("ASOF Investment Management"), ASSF Operating Manager IV, L.P. ("ASSF Operating Manager"), Ares Management LLC, Ares Management Holdings L.P. ("Ares Management Holdings"), Ares Holdco LLC ("Ares Holdco"), Ares Management Corporation ("Ares Management"), Ares Management GP LLC ("Ares Management GP"), Ares Voting LLC ("Ares Voting") and Ares Partners Holdco LLC ("Ares Partners", and together with the Ares Direct Holders, ACOF Investment Management, ASOF Investment Management, ASSF Operating Manager, Ares Management LLC, Ares Management Holdings, Ares Holdco, Ares Management, Ares Management GP, and Ares Voting, the "Reporting Persons"). Due to the electronic system's limitation of 10 Reporting Persons per joint filing, this statement is being filed in four parts.

F6 · balance_after: The Reporting Persons collectively beneficially own, or may be deemed to beneficially own, in the aggregate 35,205,125 shares of Common Stock (which aggregate ownership did not change as a result of the Transfers) by reason of the direct or indirect beneficial ownership of such shares as follows: (i) ACOF VI Frontier AIV A1 owns 249,805 shares of Common Stock; (ii) ACOF VI Frontier AIV A2 owns 89,581 shares of Common Stock; (iii) ACOF VI Frontier AIV A3 owns 20,902 shares of Common Stock; (iv) ACOF VI Frontier AIV A4 owns 271,730 shares of Common Stock; (v) ACOF VI Frontier AIV A5 owns 298,604 shares of Common Stock; (vi) ACOF VI Frontier AIV A6 owns 167,219 shares of Common Stock; (vii) ACOF VI Frontier AIV A7 owns 302,616 shares of Common Stock; (viii) ACOF VI Frontier AIV A8 owns shares 303,979 of Common Stock; (continued in next footnote)

F7 · balance_after: (ix) ACOF VI Frontier AIV A9 owns 285,466 shares of Common Stock; (x) ACOF VI Frontier AIV A10 owns 90,268 shares of Common Stock; (xi) ACOF VI Frontier AIV B1 owns 15,068,130 shares of Common Stock;(xii) ASOF Frontier AIV A1 owns 105,592 shares of Common Stock; (xiii) ASOF Frontier AIV A2 owns 18,032 shares of Common Stock; (xiv) ASOF Frontier AIV A3 owns 830,837 shares of Common Stock; (xv) ASOF Frontier AIV A4 owns 281,844 shares of Common Stock; (xvi) ASOF Frontier AIV A5 owns 167,160 shares of Common Stock; (xvii) ASOF Frontier AIV A6 owns 292,124 shares of Common Stock; (xviii) ASOF Frontier AIV A7 owns 289,417 shares of Common Stock; (xix) ASOF Frontier AIV A8 owns 238,026 shares of Common Stock; (xx) ASOF Frontier AIV A9 owns 360,644 shares of Common Stock; (xxi) ASOF Frontier AIV A10 owns 259,665 shares of Common Stock; (xxii) ASOF Frontier AIV A11 owns 245,236 shares of Common Stock; (continued in next footnote)

F8 · balance_after: (xiii) ASOF Frontier AIV B1 owns 9,597,579 shares of Common Stock; (xxiv) ASSF IV AIV B Holdings III owns 2,694,242 shares of Common Stock; and (xxv) ASSF IV AIV B directly or indirectly owns 2,654,041 shares of Common Stock. Because the aggregate number of shares of Common Stock sold by Ares Direct Holders in the Transfers equals the number of shares of Common Stock purchased by Ares Direct Holders in the Transfers, the total number of shares of Common Stock that Ares Management LLC (as well as ACOF Investment Management, ASOF Investment Management, ASSF Operating Manager, Ares Management Holdings, Ares Holdco, Ares Management Corporation, Ares Management GP, Ares Voting and Ares Partners Holdco), may be deemed to beneficially own did not change as a result of the Transfers.

F9 · balance_after: ACOF Investment Management is the manager of the ACOF Funds, ASOF Investment Management is the manager of ASOF Funds, ASSF Operating Manager is the manager of the ASSF Funds. Ares Management LLC is the sole member of ACOF Investment Management and ASOF Investment Management and the general partner of ASSF Operating Manager. Ares Management LLC has direct or indirect power to vote and/or dispose of the shares of Common Stock held by each Ares Direct Holder, and accordingly, Ares Management LLC may be deemed to have beneficial ownership of the shares of Common Stock reported herein. The sole member of Ares Management LLC is Ares Management Holdings and the general partner of Ares Management Holdings is Ares Holdco.

F10 · balance_after: The sole member of Ares Holdco is Ares Management. Ares Management GP is the sole holder of the Class B common stock, $0.01 par value per share, of Ares Management (the "Ares Class B Common Stock") and Ares Voting is the sole holder of the Class C common stock, $0.01 par value per share, of Ares Management (the "Ares Class C Common Stock"). (continued in next footnote)

F11 · balance_after: Pursuant to Ares Management's Certificate of Incorporation, the holders of the Ares Class B Common Stock and the Ares Class C Common Stock, collectively, will generally have the majority of the votes on any matter submitted to the stockholders of Ares Management if certain conditions are met. The sole member of both Ares Management GP and Ares Voting is Ares Partners. Ares Partners is managed by a board of managers, which is composed of Michael Arougheti, Ryan Berry, R. Kipp deVeer, David Kaplan, Antony Ressler and Bennett Rosenthal (collectively, the "Board Members"). Mr. Ressler generally has veto authority over decisions by the Board Members. (continued in next footnote)

F12 · balance_after: Each of the Reporting Persons, and the Board Members, and the other directors, officers, partners, stockholders, members and managers of the Reporting Persons, expressly disclaims beneficial ownership of the Common Stock, except to the extent of any pecuniary interest therein, and this Form 4 shall not be deemed an admission that any such person or entity is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purposes.

F2 · ownership.nature: This statement is being filed by ACOF VI Frontier AIV A1, L.P. ("ACOF VI Frontier AIV A1"), ACOF VI Frontier AIV A2, L.P. ("ACOF VI Frontier AIV A2"), ACOF VI Frontier AIV A3, L.P. ("ACOF VI Frontier AIV A3"), ACOF VI Frontier AIV A4, L.P. ("ACOF VI Frontier AIV A4"), ACOF VI Frontier AIV A5, L.P. ("ACOF VI Frontier AIV A5"), ACOF VI Frontier AIV A6, L.P. ("ACOF VI Frontier AIV A6"), ACOF VI Frontier AIV A7, L.P. ("ACOF VI Frontier AIV A7"), ACOF VI Frontier AIV A8, L.P. ("ACOF VI Frontier AIV A8"), ACOF VI Frontier AIV A9, L.P. ("ACOF VI Frontier AIV A9"), ACOF VI Frontier AIV A10, L.P. ("ACOF VI Frontier AIV A10"), and ACOF VI Frontier AIV B1, L.P. ("ACOF VI Frontier AIV B1", together with the foregoing entities, the "ACOF Funds"), (continued in next footnote)

F3 · ownership.nature: ASOF Frontier AIV A1, L.P. ("ASOF Frontier AIV A1"), ASOF Frontier AIV A2, L.P. ("ASOF Frontier AIV A2"), ASOF Frontier AIV A3, L.P. ("ASOF Frontier AIV A3"), ASOF Frontier AIV A4, L.P. ("ASOF Frontier AIV A4"), ASOF Frontier AIV A5, L.P. ("ASOF Frontier AIV A5"), ASOF Frontier AIV A6, L.P. ("ASOF Frontier AIV A6"), ASOF Frontier AIV A7, L.P. ("ASOF Frontier AIV A7"), ASOF Frontier AIV A8, L.P. ("ASOF Frontier AIV A8"), ASOF Frontier AIV A9, L.P. ("ASOF Frontier AIV A9"), ASOF Frontier AIV A10, L.P. ("ASOF Frontier AIV A10"), ASOF Frontier AIV A11, L.P. ("ASOF Frontier AIV A11"), (continued in next footnote)

F4 · ownership.nature: and ASOF Frontier AIV B1, L.P. ("ASOF Frontier AIV B1", together with ASOF Frontier AIV A1, ASOF Frontier AIV A2, ASOF Frontier AIV A3, ASOF Frontier AIV A4, ASOF Frontier AIV A5, ASOF Frontier AIV A6, ASOF Frontier AIV A7, ASOF Frontier AIV A8, ASOF Frontier AIV A9, ASOF Frontier AIV A10, and ASOF Frontier AIV A11, the "ASOF Funds"), ASSF IV AIV B Holdings III, L.P. ("ASSF IV AIV B Holdings III"), ASSF IV AIV B, L.P. ("ASSF IV AIV B", and together with ASSF IV AIV B Holdings III, the "ASSF Funds", and together with the ACOF Funds, and the ASOF Funds, the "Ares Direct Holders"), (continued in next footnote)

F5 · ownership.nature: ACOF Investment Management LLC ("ACOF Investment Management"), ASOF Investment Management LLC ("ASOF Investment Management"), ASSF Operating Manager IV, L.P. ("ASSF Operating Manager"), Ares Management LLC, Ares Management Holdings L.P. ("Ares Management Holdings"), Ares Holdco LLC ("Ares Holdco"), Ares Management Corporation ("Ares Management"), Ares Management GP LLC ("Ares Management GP"), Ares Voting LLC ("Ares Voting") and Ares Partners Holdco LLC ("Ares Partners", and together with the Ares Direct Holders, ACOF Investment Management, ASOF Investment Management, ASSF Operating Manager, Ares Management LLC, Ares Management Holdings, Ares Holdco, Ares Management, Ares Management GP, and Ares Voting, the "Reporting Persons"). Due to the electronic system's limitation of 10 Reporting Persons per joint filing, this statement is being filed in four parts.

F6 · ownership.nature: The Reporting Persons collectively beneficially own, or may be deemed to beneficially own, in the aggregate 35,205,125 shares of Common Stock (which aggregate ownership did not change as a result of the Transfers) by reason of the direct or indirect beneficial ownership of such shares as follows: (i) ACOF VI Frontier AIV A1 owns 249,805 shares of Common Stock; (ii) ACOF VI Frontier AIV A2 owns 89,581 shares of Common Stock; (iii) ACOF VI Frontier AIV A3 owns 20,902 shares of Common Stock; (iv) ACOF VI Frontier AIV A4 owns 271,730 shares of Common Stock; (v) ACOF VI Frontier AIV A5 owns 298,604 shares of Common Stock; (vi) ACOF VI Frontier AIV A6 owns 167,219 shares of Common Stock; (vii) ACOF VI Frontier AIV A7 owns 302,616 shares of Common Stock; (viii) ACOF VI Frontier AIV A8 owns shares 303,979 of Common Stock; (continued in next footnote)

F7 · ownership.nature: (ix) ACOF VI Frontier AIV A9 owns 285,466 shares of Common Stock; (x) ACOF VI Frontier AIV A10 owns 90,268 shares of Common Stock; (xi) ACOF VI Frontier AIV B1 owns 15,068,130 shares of Common Stock;(xii) ASOF Frontier AIV A1 owns 105,592 shares of Common Stock; (xiii) ASOF Frontier AIV A2 owns 18,032 shares of Common Stock; (xiv) ASOF Frontier AIV A3 owns 830,837 shares of Common Stock; (xv) ASOF Frontier AIV A4 owns 281,844 shares of Common Stock; (xvi) ASOF Frontier AIV A5 owns 167,160 shares of Common Stock; (xvii) ASOF Frontier AIV A6 owns 292,124 shares of Common Stock; (xviii) ASOF Frontier AIV A7 owns 289,417 shares of Common Stock; (xix) ASOF Frontier AIV A8 owns 238,026 shares of Common Stock; (xx) ASOF Frontier AIV A9 owns 360,644 shares of Common Stock; (xxi) ASOF Frontier AIV A10 owns 259,665 shares of Common Stock; (xxii) ASOF Frontier AIV A11 owns 245,236 shares of Common Stock; (continued in next footnote)

F8 · ownership.nature: (xiii) ASOF Frontier AIV B1 owns 9,597,579 shares of Common Stock; (xxiv) ASSF IV AIV B Holdings III owns 2,694,242 shares of Common Stock; and (xxv) ASSF IV AIV B directly or indirectly owns 2,654,041 shares of Common Stock. Because the aggregate number of shares of Common Stock sold by Ares Direct Holders in the Transfers equals the number of shares of Common Stock purchased by Ares Direct Holders in the Transfers, the total number of shares of Common Stock that Ares Management LLC (as well as ACOF Investment Management, ASOF Investment Management, ASSF Operating Manager, Ares Management Holdings, Ares Holdco, Ares Management Corporation, Ares Management GP, Ares Voting and Ares Partners Holdco), may be deemed to beneficially own did not change as a result of the Transfers.

F9 · ownership.nature: ACOF Investment Management is the manager of the ACOF Funds, ASOF Investment Management is the manager of ASOF Funds, ASSF Operating Manager is the manager of the ASSF Funds. Ares Management LLC is the sole member of ACOF Investment Management and ASOF Investment Management and the general partner of ASSF Operating Manager. Ares Management LLC has direct or indirect power to vote and/or dispose of the shares of Common Stock held by each Ares Direct Holder, and accordingly, Ares Management LLC may be deemed to have beneficial ownership of the shares of Common Stock reported herein. The sole member of Ares Management LLC is Ares Management Holdings and the general partner of Ares Management Holdings is Ares Holdco.

F10 · ownership.nature: The sole member of Ares Holdco is Ares Management. Ares Management GP is the sole holder of the Class B common stock, $0.01 par value per share, of Ares Management (the "Ares Class B Common Stock") and Ares Voting is the sole holder of the Class C common stock, $0.01 par value per share, of Ares Management (the "Ares Class C Common Stock"). (continued in next footnote)

F11 · ownership.nature: Pursuant to Ares Management's Certificate of Incorporation, the holders of the Ares Class B Common Stock and the Ares Class C Common Stock, collectively, will generally have the majority of the votes on any matter submitted to the stockholders of Ares Management if certain conditions are met. The sole member of both Ares Management GP and Ares Voting is Ares Partners. Ares Partners is managed by a board of managers, which is composed of Michael Arougheti, Ryan Berry, R. Kipp deVeer, David Kaplan, Antony Ressler and Bennett Rosenthal (collectively, the "Board Members"). Mr. Ressler generally has veto authority over decisions by the Board Members. (continued in next footnote)

F12 · ownership.nature: Each of the Reporting Persons, and the Board Members, and the other directors, officers, partners, stockholders, members and managers of the Reporting Persons, expressly disclaims beneficial ownership of the Common Stock, except to the extent of any pecuniary interest therein, and this Form 4 shall not be deemed an admission that any such person or entity is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purposes.

SEC source: 0001104659-21-120390 · tm2128492-1_4seq1.xml · nonDerivative · entry 12

ARES MANAGEMENT LLC · CIK 0001259313 · 10% owner

ACOF VI Frontier AIV A1, L.P. · CIK 0001862494 · 10% owner

ACOF VI Frontier AIV A2, L.P. · CIK 0001862499 · 10% owner

ACOF VI Frontier AIV A3, L.P. · CIK 0001862534 · 10% owner

ACOF VI Frontier AIV A4, L.P. · CIK 0001862529 · 10% owner

ACOF VI Frontier AIV A5, L.P. · CIK 0001862526 · 10% owner

ACOF VI Frontier AIV A6, L.P. · CIK 0001862483 · 10% owner

ACOF VI Frontier AIV A7, L.P. · CIK 0001862482 · 10% owner

ACOF VI Frontier AIV A8, L.P. · CIK 0001862505 · 10% owner

ACOF VI Frontier AIV A9, L.P. · CIK 0001862533 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · By ASOF Frontier AIV B1, L.P.

Disclosed balance after: 9,597,579

F1 · kind: These transactions reflect inter-fund transfers (the "Transfers") of shares of the Issuer's Common Stock from one Ares Direct Holder (as defined below) to another Ares Direct Holder in connection with an internal rebalancing of such Ares Direct Holders' holdings of Common Stock. Each Transfer occurred at the same time and at the same price.

F2 · balance_after: This statement is being filed by ACOF VI Frontier AIV A1, L.P. ("ACOF VI Frontier AIV A1"), ACOF VI Frontier AIV A2, L.P. ("ACOF VI Frontier AIV A2"), ACOF VI Frontier AIV A3, L.P. ("ACOF VI Frontier AIV A3"), ACOF VI Frontier AIV A4, L.P. ("ACOF VI Frontier AIV A4"), ACOF VI Frontier AIV A5, L.P. ("ACOF VI Frontier AIV A5"), ACOF VI Frontier AIV A6, L.P. ("ACOF VI Frontier AIV A6"), ACOF VI Frontier AIV A7, L.P. ("ACOF VI Frontier AIV A7"), ACOF VI Frontier AIV A8, L.P. ("ACOF VI Frontier AIV A8"), ACOF VI Frontier AIV A9, L.P. ("ACOF VI Frontier AIV A9"), ACOF VI Frontier AIV A10, L.P. ("ACOF VI Frontier AIV A10"), and ACOF VI Frontier AIV B1, L.P. ("ACOF VI Frontier AIV B1", together with the foregoing entities, the "ACOF Funds"), (continued in next footnote)

F3 · balance_after: ASOF Frontier AIV A1, L.P. ("ASOF Frontier AIV A1"), ASOF Frontier AIV A2, L.P. ("ASOF Frontier AIV A2"), ASOF Frontier AIV A3, L.P. ("ASOF Frontier AIV A3"), ASOF Frontier AIV A4, L.P. ("ASOF Frontier AIV A4"), ASOF Frontier AIV A5, L.P. ("ASOF Frontier AIV A5"), ASOF Frontier AIV A6, L.P. ("ASOF Frontier AIV A6"), ASOF Frontier AIV A7, L.P. ("ASOF Frontier AIV A7"), ASOF Frontier AIV A8, L.P. ("ASOF Frontier AIV A8"), ASOF Frontier AIV A9, L.P. ("ASOF Frontier AIV A9"), ASOF Frontier AIV A10, L.P. ("ASOF Frontier AIV A10"), ASOF Frontier AIV A11, L.P. ("ASOF Frontier AIV A11"), (continued in next footnote)

F4 · balance_after: and ASOF Frontier AIV B1, L.P. ("ASOF Frontier AIV B1", together with ASOF Frontier AIV A1, ASOF Frontier AIV A2, ASOF Frontier AIV A3, ASOF Frontier AIV A4, ASOF Frontier AIV A5, ASOF Frontier AIV A6, ASOF Frontier AIV A7, ASOF Frontier AIV A8, ASOF Frontier AIV A9, ASOF Frontier AIV A10, and ASOF Frontier AIV A11, the "ASOF Funds"), ASSF IV AIV B Holdings III, L.P. ("ASSF IV AIV B Holdings III"), ASSF IV AIV B, L.P. ("ASSF IV AIV B", and together with ASSF IV AIV B Holdings III, the "ASSF Funds", and together with the ACOF Funds, and the ASOF Funds, the "Ares Direct Holders"), (continued in next footnote)

F5 · balance_after: ACOF Investment Management LLC ("ACOF Investment Management"), ASOF Investment Management LLC ("ASOF Investment Management"), ASSF Operating Manager IV, L.P. ("ASSF Operating Manager"), Ares Management LLC, Ares Management Holdings L.P. ("Ares Management Holdings"), Ares Holdco LLC ("Ares Holdco"), Ares Management Corporation ("Ares Management"), Ares Management GP LLC ("Ares Management GP"), Ares Voting LLC ("Ares Voting") and Ares Partners Holdco LLC ("Ares Partners", and together with the Ares Direct Holders, ACOF Investment Management, ASOF Investment Management, ASSF Operating Manager, Ares Management LLC, Ares Management Holdings, Ares Holdco, Ares Management, Ares Management GP, and Ares Voting, the "Reporting Persons"). Due to the electronic system's limitation of 10 Reporting Persons per joint filing, this statement is being filed in four parts.

F6 · balance_after: The Reporting Persons collectively beneficially own, or may be deemed to beneficially own, in the aggregate 35,205,125 shares of Common Stock (which aggregate ownership did not change as a result of the Transfers) by reason of the direct or indirect beneficial ownership of such shares as follows: (i) ACOF VI Frontier AIV A1 owns 249,805 shares of Common Stock; (ii) ACOF VI Frontier AIV A2 owns 89,581 shares of Common Stock; (iii) ACOF VI Frontier AIV A3 owns 20,902 shares of Common Stock; (iv) ACOF VI Frontier AIV A4 owns 271,730 shares of Common Stock; (v) ACOF VI Frontier AIV A5 owns 298,604 shares of Common Stock; (vi) ACOF VI Frontier AIV A6 owns 167,219 shares of Common Stock; (vii) ACOF VI Frontier AIV A7 owns 302,616 shares of Common Stock; (viii) ACOF VI Frontier AIV A8 owns shares 303,979 of Common Stock; (continued in next footnote)

F7 · balance_after: (ix) ACOF VI Frontier AIV A9 owns 285,466 shares of Common Stock; (x) ACOF VI Frontier AIV A10 owns 90,268 shares of Common Stock; (xi) ACOF VI Frontier AIV B1 owns 15,068,130 shares of Common Stock;(xii) ASOF Frontier AIV A1 owns 105,592 shares of Common Stock; (xiii) ASOF Frontier AIV A2 owns 18,032 shares of Common Stock; (xiv) ASOF Frontier AIV A3 owns 830,837 shares of Common Stock; (xv) ASOF Frontier AIV A4 owns 281,844 shares of Common Stock; (xvi) ASOF Frontier AIV A5 owns 167,160 shares of Common Stock; (xvii) ASOF Frontier AIV A6 owns 292,124 shares of Common Stock; (xviii) ASOF Frontier AIV A7 owns 289,417 shares of Common Stock; (xix) ASOF Frontier AIV A8 owns 238,026 shares of Common Stock; (xx) ASOF Frontier AIV A9 owns 360,644 shares of Common Stock; (xxi) ASOF Frontier AIV A10 owns 259,665 shares of Common Stock; (xxii) ASOF Frontier AIV A11 owns 245,236 shares of Common Stock; (continued in next footnote)

F8 · balance_after: (xiii) ASOF Frontier AIV B1 owns 9,597,579 shares of Common Stock; (xxiv) ASSF IV AIV B Holdings III owns 2,694,242 shares of Common Stock; and (xxv) ASSF IV AIV B directly or indirectly owns 2,654,041 shares of Common Stock. Because the aggregate number of shares of Common Stock sold by Ares Direct Holders in the Transfers equals the number of shares of Common Stock purchased by Ares Direct Holders in the Transfers, the total number of shares of Common Stock that Ares Management LLC (as well as ACOF Investment Management, ASOF Investment Management, ASSF Operating Manager, Ares Management Holdings, Ares Holdco, Ares Management Corporation, Ares Management GP, Ares Voting and Ares Partners Holdco), may be deemed to beneficially own did not change as a result of the Transfers.

F9 · balance_after: ACOF Investment Management is the manager of the ACOF Funds, ASOF Investment Management is the manager of ASOF Funds, ASSF Operating Manager is the manager of the ASSF Funds. Ares Management LLC is the sole member of ACOF Investment Management and ASOF Investment Management and the general partner of ASSF Operating Manager. Ares Management LLC has direct or indirect power to vote and/or dispose of the shares of Common Stock held by each Ares Direct Holder, and accordingly, Ares Management LLC may be deemed to have beneficial ownership of the shares of Common Stock reported herein. The sole member of Ares Management LLC is Ares Management Holdings and the general partner of Ares Management Holdings is Ares Holdco.

F10 · balance_after: The sole member of Ares Holdco is Ares Management. Ares Management GP is the sole holder of the Class B common stock, $0.01 par value per share, of Ares Management (the "Ares Class B Common Stock") and Ares Voting is the sole holder of the Class C common stock, $0.01 par value per share, of Ares Management (the "Ares Class C Common Stock"). (continued in next footnote)

F11 · balance_after: Pursuant to Ares Management's Certificate of Incorporation, the holders of the Ares Class B Common Stock and the Ares Class C Common Stock, collectively, will generally have the majority of the votes on any matter submitted to the stockholders of Ares Management if certain conditions are met. The sole member of both Ares Management GP and Ares Voting is Ares Partners. Ares Partners is managed by a board of managers, which is composed of Michael Arougheti, Ryan Berry, R. Kipp deVeer, David Kaplan, Antony Ressler and Bennett Rosenthal (collectively, the "Board Members"). Mr. Ressler generally has veto authority over decisions by the Board Members. (continued in next footnote)

F12 · balance_after: Each of the Reporting Persons, and the Board Members, and the other directors, officers, partners, stockholders, members and managers of the Reporting Persons, expressly disclaims beneficial ownership of the Common Stock, except to the extent of any pecuniary interest therein, and this Form 4 shall not be deemed an admission that any such person or entity is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purposes.

F13 · balance_after: The Reporting Persons' beneficial ownership includes a collective total of 85 previously unreported shares of Common Stock, of which the Reporting Persons were notified by their custodian after those shares' initial acquisition date.

F2 · ownership.nature: This statement is being filed by ACOF VI Frontier AIV A1, L.P. ("ACOF VI Frontier AIV A1"), ACOF VI Frontier AIV A2, L.P. ("ACOF VI Frontier AIV A2"), ACOF VI Frontier AIV A3, L.P. ("ACOF VI Frontier AIV A3"), ACOF VI Frontier AIV A4, L.P. ("ACOF VI Frontier AIV A4"), ACOF VI Frontier AIV A5, L.P. ("ACOF VI Frontier AIV A5"), ACOF VI Frontier AIV A6, L.P. ("ACOF VI Frontier AIV A6"), ACOF VI Frontier AIV A7, L.P. ("ACOF VI Frontier AIV A7"), ACOF VI Frontier AIV A8, L.P. ("ACOF VI Frontier AIV A8"), ACOF VI Frontier AIV A9, L.P. ("ACOF VI Frontier AIV A9"), ACOF VI Frontier AIV A10, L.P. ("ACOF VI Frontier AIV A10"), and ACOF VI Frontier AIV B1, L.P. ("ACOF VI Frontier AIV B1", together with the foregoing entities, the "ACOF Funds"), (continued in next footnote)

F3 · ownership.nature: ASOF Frontier AIV A1, L.P. ("ASOF Frontier AIV A1"), ASOF Frontier AIV A2, L.P. ("ASOF Frontier AIV A2"), ASOF Frontier AIV A3, L.P. ("ASOF Frontier AIV A3"), ASOF Frontier AIV A4, L.P. ("ASOF Frontier AIV A4"), ASOF Frontier AIV A5, L.P. ("ASOF Frontier AIV A5"), ASOF Frontier AIV A6, L.P. ("ASOF Frontier AIV A6"), ASOF Frontier AIV A7, L.P. ("ASOF Frontier AIV A7"), ASOF Frontier AIV A8, L.P. ("ASOF Frontier AIV A8"), ASOF Frontier AIV A9, L.P. ("ASOF Frontier AIV A9"), ASOF Frontier AIV A10, L.P. ("ASOF Frontier AIV A10"), ASOF Frontier AIV A11, L.P. ("ASOF Frontier AIV A11"), (continued in next footnote)

F4 · ownership.nature: and ASOF Frontier AIV B1, L.P. ("ASOF Frontier AIV B1", together with ASOF Frontier AIV A1, ASOF Frontier AIV A2, ASOF Frontier AIV A3, ASOF Frontier AIV A4, ASOF Frontier AIV A5, ASOF Frontier AIV A6, ASOF Frontier AIV A7, ASOF Frontier AIV A8, ASOF Frontier AIV A9, ASOF Frontier AIV A10, and ASOF Frontier AIV A11, the "ASOF Funds"), ASSF IV AIV B Holdings III, L.P. ("ASSF IV AIV B Holdings III"), ASSF IV AIV B, L.P. ("ASSF IV AIV B", and together with ASSF IV AIV B Holdings III, the "ASSF Funds", and together with the ACOF Funds, and the ASOF Funds, the "Ares Direct Holders"), (continued in next footnote)

F5 · ownership.nature: ACOF Investment Management LLC ("ACOF Investment Management"), ASOF Investment Management LLC ("ASOF Investment Management"), ASSF Operating Manager IV, L.P. ("ASSF Operating Manager"), Ares Management LLC, Ares Management Holdings L.P. ("Ares Management Holdings"), Ares Holdco LLC ("Ares Holdco"), Ares Management Corporation ("Ares Management"), Ares Management GP LLC ("Ares Management GP"), Ares Voting LLC ("Ares Voting") and Ares Partners Holdco LLC ("Ares Partners", and together with the Ares Direct Holders, ACOF Investment Management, ASOF Investment Management, ASSF Operating Manager, Ares Management LLC, Ares Management Holdings, Ares Holdco, Ares Management, Ares Management GP, and Ares Voting, the "Reporting Persons"). Due to the electronic system's limitation of 10 Reporting Persons per joint filing, this statement is being filed in four parts.

F6 · ownership.nature: The Reporting Persons collectively beneficially own, or may be deemed to beneficially own, in the aggregate 35,205,125 shares of Common Stock (which aggregate ownership did not change as a result of the Transfers) by reason of the direct or indirect beneficial ownership of such shares as follows: (i) ACOF VI Frontier AIV A1 owns 249,805 shares of Common Stock; (ii) ACOF VI Frontier AIV A2 owns 89,581 shares of Common Stock; (iii) ACOF VI Frontier AIV A3 owns 20,902 shares of Common Stock; (iv) ACOF VI Frontier AIV A4 owns 271,730 shares of Common Stock; (v) ACOF VI Frontier AIV A5 owns 298,604 shares of Common Stock; (vi) ACOF VI Frontier AIV A6 owns 167,219 shares of Common Stock; (vii) ACOF VI Frontier AIV A7 owns 302,616 shares of Common Stock; (viii) ACOF VI Frontier AIV A8 owns shares 303,979 of Common Stock; (continued in next footnote)

F7 · ownership.nature: (ix) ACOF VI Frontier AIV A9 owns 285,466 shares of Common Stock; (x) ACOF VI Frontier AIV A10 owns 90,268 shares of Common Stock; (xi) ACOF VI Frontier AIV B1 owns 15,068,130 shares of Common Stock;(xii) ASOF Frontier AIV A1 owns 105,592 shares of Common Stock; (xiii) ASOF Frontier AIV A2 owns 18,032 shares of Common Stock; (xiv) ASOF Frontier AIV A3 owns 830,837 shares of Common Stock; (xv) ASOF Frontier AIV A4 owns 281,844 shares of Common Stock; (xvi) ASOF Frontier AIV A5 owns 167,160 shares of Common Stock; (xvii) ASOF Frontier AIV A6 owns 292,124 shares of Common Stock; (xviii) ASOF Frontier AIV A7 owns 289,417 shares of Common Stock; (xix) ASOF Frontier AIV A8 owns 238,026 shares of Common Stock; (xx) ASOF Frontier AIV A9 owns 360,644 shares of Common Stock; (xxi) ASOF Frontier AIV A10 owns 259,665 shares of Common Stock; (xxii) ASOF Frontier AIV A11 owns 245,236 shares of Common Stock; (continued in next footnote)

F8 · ownership.nature: (xiii) ASOF Frontier AIV B1 owns 9,597,579 shares of Common Stock; (xxiv) ASSF IV AIV B Holdings III owns 2,694,242 shares of Common Stock; and (xxv) ASSF IV AIV B directly or indirectly owns 2,654,041 shares of Common Stock. Because the aggregate number of shares of Common Stock sold by Ares Direct Holders in the Transfers equals the number of shares of Common Stock purchased by Ares Direct Holders in the Transfers, the total number of shares of Common Stock that Ares Management LLC (as well as ACOF Investment Management, ASOF Investment Management, ASSF Operating Manager, Ares Management Holdings, Ares Holdco, Ares Management Corporation, Ares Management GP, Ares Voting and Ares Partners Holdco), may be deemed to beneficially own did not change as a result of the Transfers.

F9 · ownership.nature: ACOF Investment Management is the manager of the ACOF Funds, ASOF Investment Management is the manager of ASOF Funds, ASSF Operating Manager is the manager of the ASSF Funds. Ares Management LLC is the sole member of ACOF Investment Management and ASOF Investment Management and the general partner of ASSF Operating Manager. Ares Management LLC has direct or indirect power to vote and/or dispose of the shares of Common Stock held by each Ares Direct Holder, and accordingly, Ares Management LLC may be deemed to have beneficial ownership of the shares of Common Stock reported herein. The sole member of Ares Management LLC is Ares Management Holdings and the general partner of Ares Management Holdings is Ares Holdco.

F10 · ownership.nature: The sole member of Ares Holdco is Ares Management. Ares Management GP is the sole holder of the Class B common stock, $0.01 par value per share, of Ares Management (the "Ares Class B Common Stock") and Ares Voting is the sole holder of the Class C common stock, $0.01 par value per share, of Ares Management (the "Ares Class C Common Stock"). (continued in next footnote)

F11 · ownership.nature: Pursuant to Ares Management's Certificate of Incorporation, the holders of the Ares Class B Common Stock and the Ares Class C Common Stock, collectively, will generally have the majority of the votes on any matter submitted to the stockholders of Ares Management if certain conditions are met. The sole member of both Ares Management GP and Ares Voting is Ares Partners. Ares Partners is managed by a board of managers, which is composed of Michael Arougheti, Ryan Berry, R. Kipp deVeer, David Kaplan, Antony Ressler and Bennett Rosenthal (collectively, the "Board Members"). Mr. Ressler generally has veto authority over decisions by the Board Members. (continued in next footnote)

F12 · ownership.nature: Each of the Reporting Persons, and the Board Members, and the other directors, officers, partners, stockholders, members and managers of the Reporting Persons, expressly disclaims beneficial ownership of the Common Stock, except to the extent of any pecuniary interest therein, and this Form 4 shall not be deemed an admission that any such person or entity is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purposes.

F13 · ownership.nature: The Reporting Persons' beneficial ownership includes a collective total of 85 previously unreported shares of Common Stock, of which the Reporting Persons were notified by their custodian after those shares' initial acquisition date.

SEC source: 0001104659-21-120390 · tm2128492-1_4seq1.xml · nonDerivative · entry 11

ARES MANAGEMENT LLC · CIK 0001259313 · 10% owner

ACOF VI Frontier AIV A1, L.P. · CIK 0001862494 · 10% owner

ACOF VI Frontier AIV A2, L.P. · CIK 0001862499 · 10% owner

ACOF VI Frontier AIV A3, L.P. · CIK 0001862534 · 10% owner

ACOF VI Frontier AIV A4, L.P. · CIK 0001862529 · 10% owner

ACOF VI Frontier AIV A5, L.P. · CIK 0001862526 · 10% owner

ACOF VI Frontier AIV A6, L.P. · CIK 0001862483 · 10% owner

ACOF VI Frontier AIV A7, L.P. · CIK 0001862482 · 10% owner

ACOF VI Frontier AIV A8, L.P. · CIK 0001862505 · 10% owner

ACOF VI Frontier AIV A9, L.P. · CIK 0001862533 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · By ASOF Frontier AIV A11, L.P.

Disclosed balance after: 245,236

F1 · kind: These transactions reflect inter-fund transfers (the "Transfers") of shares of the Issuer's Common Stock from one Ares Direct Holder (as defined below) to another Ares Direct Holder in connection with an internal rebalancing of such Ares Direct Holders' holdings of Common Stock. Each Transfer occurred at the same time and at the same price.

F2 · balance_after: This statement is being filed by ACOF VI Frontier AIV A1, L.P. ("ACOF VI Frontier AIV A1"), ACOF VI Frontier AIV A2, L.P. ("ACOF VI Frontier AIV A2"), ACOF VI Frontier AIV A3, L.P. ("ACOF VI Frontier AIV A3"), ACOF VI Frontier AIV A4, L.P. ("ACOF VI Frontier AIV A4"), ACOF VI Frontier AIV A5, L.P. ("ACOF VI Frontier AIV A5"), ACOF VI Frontier AIV A6, L.P. ("ACOF VI Frontier AIV A6"), ACOF VI Frontier AIV A7, L.P. ("ACOF VI Frontier AIV A7"), ACOF VI Frontier AIV A8, L.P. ("ACOF VI Frontier AIV A8"), ACOF VI Frontier AIV A9, L.P. ("ACOF VI Frontier AIV A9"), ACOF VI Frontier AIV A10, L.P. ("ACOF VI Frontier AIV A10"), and ACOF VI Frontier AIV B1, L.P. ("ACOF VI Frontier AIV B1", together with the foregoing entities, the "ACOF Funds"), (continued in next footnote)

F3 · balance_after: ASOF Frontier AIV A1, L.P. ("ASOF Frontier AIV A1"), ASOF Frontier AIV A2, L.P. ("ASOF Frontier AIV A2"), ASOF Frontier AIV A3, L.P. ("ASOF Frontier AIV A3"), ASOF Frontier AIV A4, L.P. ("ASOF Frontier AIV A4"), ASOF Frontier AIV A5, L.P. ("ASOF Frontier AIV A5"), ASOF Frontier AIV A6, L.P. ("ASOF Frontier AIV A6"), ASOF Frontier AIV A7, L.P. ("ASOF Frontier AIV A7"), ASOF Frontier AIV A8, L.P. ("ASOF Frontier AIV A8"), ASOF Frontier AIV A9, L.P. ("ASOF Frontier AIV A9"), ASOF Frontier AIV A10, L.P. ("ASOF Frontier AIV A10"), ASOF Frontier AIV A11, L.P. ("ASOF Frontier AIV A11"), (continued in next footnote)

F4 · balance_after: and ASOF Frontier AIV B1, L.P. ("ASOF Frontier AIV B1", together with ASOF Frontier AIV A1, ASOF Frontier AIV A2, ASOF Frontier AIV A3, ASOF Frontier AIV A4, ASOF Frontier AIV A5, ASOF Frontier AIV A6, ASOF Frontier AIV A7, ASOF Frontier AIV A8, ASOF Frontier AIV A9, ASOF Frontier AIV A10, and ASOF Frontier AIV A11, the "ASOF Funds"), ASSF IV AIV B Holdings III, L.P. ("ASSF IV AIV B Holdings III"), ASSF IV AIV B, L.P. ("ASSF IV AIV B", and together with ASSF IV AIV B Holdings III, the "ASSF Funds", and together with the ACOF Funds, and the ASOF Funds, the "Ares Direct Holders"), (continued in next footnote)

F5 · balance_after: ACOF Investment Management LLC ("ACOF Investment Management"), ASOF Investment Management LLC ("ASOF Investment Management"), ASSF Operating Manager IV, L.P. ("ASSF Operating Manager"), Ares Management LLC, Ares Management Holdings L.P. ("Ares Management Holdings"), Ares Holdco LLC ("Ares Holdco"), Ares Management Corporation ("Ares Management"), Ares Management GP LLC ("Ares Management GP"), Ares Voting LLC ("Ares Voting") and Ares Partners Holdco LLC ("Ares Partners", and together with the Ares Direct Holders, ACOF Investment Management, ASOF Investment Management, ASSF Operating Manager, Ares Management LLC, Ares Management Holdings, Ares Holdco, Ares Management, Ares Management GP, and Ares Voting, the "Reporting Persons"). Due to the electronic system's limitation of 10 Reporting Persons per joint filing, this statement is being filed in four parts.

F6 · balance_after: The Reporting Persons collectively beneficially own, or may be deemed to beneficially own, in the aggregate 35,205,125 shares of Common Stock (which aggregate ownership did not change as a result of the Transfers) by reason of the direct or indirect beneficial ownership of such shares as follows: (i) ACOF VI Frontier AIV A1 owns 249,805 shares of Common Stock; (ii) ACOF VI Frontier AIV A2 owns 89,581 shares of Common Stock; (iii) ACOF VI Frontier AIV A3 owns 20,902 shares of Common Stock; (iv) ACOF VI Frontier AIV A4 owns 271,730 shares of Common Stock; (v) ACOF VI Frontier AIV A5 owns 298,604 shares of Common Stock; (vi) ACOF VI Frontier AIV A6 owns 167,219 shares of Common Stock; (vii) ACOF VI Frontier AIV A7 owns 302,616 shares of Common Stock; (viii) ACOF VI Frontier AIV A8 owns shares 303,979 of Common Stock; (continued in next footnote)

F7 · balance_after: (ix) ACOF VI Frontier AIV A9 owns 285,466 shares of Common Stock; (x) ACOF VI Frontier AIV A10 owns 90,268 shares of Common Stock; (xi) ACOF VI Frontier AIV B1 owns 15,068,130 shares of Common Stock;(xii) ASOF Frontier AIV A1 owns 105,592 shares of Common Stock; (xiii) ASOF Frontier AIV A2 owns 18,032 shares of Common Stock; (xiv) ASOF Frontier AIV A3 owns 830,837 shares of Common Stock; (xv) ASOF Frontier AIV A4 owns 281,844 shares of Common Stock; (xvi) ASOF Frontier AIV A5 owns 167,160 shares of Common Stock; (xvii) ASOF Frontier AIV A6 owns 292,124 shares of Common Stock; (xviii) ASOF Frontier AIV A7 owns 289,417 shares of Common Stock; (xix) ASOF Frontier AIV A8 owns 238,026 shares of Common Stock; (xx) ASOF Frontier AIV A9 owns 360,644 shares of Common Stock; (xxi) ASOF Frontier AIV A10 owns 259,665 shares of Common Stock; (xxii) ASOF Frontier AIV A11 owns 245,236 shares of Common Stock; (continued in next footnote)

F8 · balance_after: (xiii) ASOF Frontier AIV B1 owns 9,597,579 shares of Common Stock; (xxiv) ASSF IV AIV B Holdings III owns 2,694,242 shares of Common Stock; and (xxv) ASSF IV AIV B directly or indirectly owns 2,654,041 shares of Common Stock. Because the aggregate number of shares of Common Stock sold by Ares Direct Holders in the Transfers equals the number of shares of Common Stock purchased by Ares Direct Holders in the Transfers, the total number of shares of Common Stock that Ares Management LLC (as well as ACOF Investment Management, ASOF Investment Management, ASSF Operating Manager, Ares Management Holdings, Ares Holdco, Ares Management Corporation, Ares Management GP, Ares Voting and Ares Partners Holdco), may be deemed to beneficially own did not change as a result of the Transfers.

F9 · balance_after: ACOF Investment Management is the manager of the ACOF Funds, ASOF Investment Management is the manager of ASOF Funds, ASSF Operating Manager is the manager of the ASSF Funds. Ares Management LLC is the sole member of ACOF Investment Management and ASOF Investment Management and the general partner of ASSF Operating Manager. Ares Management LLC has direct or indirect power to vote and/or dispose of the shares of Common Stock held by each Ares Direct Holder, and accordingly, Ares Management LLC may be deemed to have beneficial ownership of the shares of Common Stock reported herein. The sole member of Ares Management LLC is Ares Management Holdings and the general partner of Ares Management Holdings is Ares Holdco.

F10 · balance_after: The sole member of Ares Holdco is Ares Management. Ares Management GP is the sole holder of the Class B common stock, $0.01 par value per share, of Ares Management (the "Ares Class B Common Stock") and Ares Voting is the sole holder of the Class C common stock, $0.01 par value per share, of Ares Management (the "Ares Class C Common Stock"). (continued in next footnote)

F11 · balance_after: Pursuant to Ares Management's Certificate of Incorporation, the holders of the Ares Class B Common Stock and the Ares Class C Common Stock, collectively, will generally have the majority of the votes on any matter submitted to the stockholders of Ares Management if certain conditions are met. The sole member of both Ares Management GP and Ares Voting is Ares Partners. Ares Partners is managed by a board of managers, which is composed of Michael Arougheti, Ryan Berry, R. Kipp deVeer, David Kaplan, Antony Ressler and Bennett Rosenthal (collectively, the "Board Members"). Mr. Ressler generally has veto authority over decisions by the Board Members. (continued in next footnote)

F12 · balance_after: Each of the Reporting Persons, and the Board Members, and the other directors, officers, partners, stockholders, members and managers of the Reporting Persons, expressly disclaims beneficial ownership of the Common Stock, except to the extent of any pecuniary interest therein, and this Form 4 shall not be deemed an admission that any such person or entity is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purposes.

F13 · balance_after: The Reporting Persons' beneficial ownership includes a collective total of 85 previously unreported shares of Common Stock, of which the Reporting Persons were notified by their custodian after those shares' initial acquisition date.

F2 · ownership.nature: This statement is being filed by ACOF VI Frontier AIV A1, L.P. ("ACOF VI Frontier AIV A1"), ACOF VI Frontier AIV A2, L.P. ("ACOF VI Frontier AIV A2"), ACOF VI Frontier AIV A3, L.P. ("ACOF VI Frontier AIV A3"), ACOF VI Frontier AIV A4, L.P. ("ACOF VI Frontier AIV A4"), ACOF VI Frontier AIV A5, L.P. ("ACOF VI Frontier AIV A5"), ACOF VI Frontier AIV A6, L.P. ("ACOF VI Frontier AIV A6"), ACOF VI Frontier AIV A7, L.P. ("ACOF VI Frontier AIV A7"), ACOF VI Frontier AIV A8, L.P. ("ACOF VI Frontier AIV A8"), ACOF VI Frontier AIV A9, L.P. ("ACOF VI Frontier AIV A9"), ACOF VI Frontier AIV A10, L.P. ("ACOF VI Frontier AIV A10"), and ACOF VI Frontier AIV B1, L.P. ("ACOF VI Frontier AIV B1", together with the foregoing entities, the "ACOF Funds"), (continued in next footnote)

F3 · ownership.nature: ASOF Frontier AIV A1, L.P. ("ASOF Frontier AIV A1"), ASOF Frontier AIV A2, L.P. ("ASOF Frontier AIV A2"), ASOF Frontier AIV A3, L.P. ("ASOF Frontier AIV A3"), ASOF Frontier AIV A4, L.P. ("ASOF Frontier AIV A4"), ASOF Frontier AIV A5, L.P. ("ASOF Frontier AIV A5"), ASOF Frontier AIV A6, L.P. ("ASOF Frontier AIV A6"), ASOF Frontier AIV A7, L.P. ("ASOF Frontier AIV A7"), ASOF Frontier AIV A8, L.P. ("ASOF Frontier AIV A8"), ASOF Frontier AIV A9, L.P. ("ASOF Frontier AIV A9"), ASOF Frontier AIV A10, L.P. ("ASOF Frontier AIV A10"), ASOF Frontier AIV A11, L.P. ("ASOF Frontier AIV A11"), (continued in next footnote)

F4 · ownership.nature: and ASOF Frontier AIV B1, L.P. ("ASOF Frontier AIV B1", together with ASOF Frontier AIV A1, ASOF Frontier AIV A2, ASOF Frontier AIV A3, ASOF Frontier AIV A4, ASOF Frontier AIV A5, ASOF Frontier AIV A6, ASOF Frontier AIV A7, ASOF Frontier AIV A8, ASOF Frontier AIV A9, ASOF Frontier AIV A10, and ASOF Frontier AIV A11, the "ASOF Funds"), ASSF IV AIV B Holdings III, L.P. ("ASSF IV AIV B Holdings III"), ASSF IV AIV B, L.P. ("ASSF IV AIV B", and together with ASSF IV AIV B Holdings III, the "ASSF Funds", and together with the ACOF Funds, and the ASOF Funds, the "Ares Direct Holders"), (continued in next footnote)

F5 · ownership.nature: ACOF Investment Management LLC ("ACOF Investment Management"), ASOF Investment Management LLC ("ASOF Investment Management"), ASSF Operating Manager IV, L.P. ("ASSF Operating Manager"), Ares Management LLC, Ares Management Holdings L.P. ("Ares Management Holdings"), Ares Holdco LLC ("Ares Holdco"), Ares Management Corporation ("Ares Management"), Ares Management GP LLC ("Ares Management GP"), Ares Voting LLC ("Ares Voting") and Ares Partners Holdco LLC ("Ares Partners", and together with the Ares Direct Holders, ACOF Investment Management, ASOF Investment Management, ASSF Operating Manager, Ares Management LLC, Ares Management Holdings, Ares Holdco, Ares Management, Ares Management GP, and Ares Voting, the "Reporting Persons"). Due to the electronic system's limitation of 10 Reporting Persons per joint filing, this statement is being filed in four parts.

F6 · ownership.nature: The Reporting Persons collectively beneficially own, or may be deemed to beneficially own, in the aggregate 35,205,125 shares of Common Stock (which aggregate ownership did not change as a result of the Transfers) by reason of the direct or indirect beneficial ownership of such shares as follows: (i) ACOF VI Frontier AIV A1 owns 249,805 shares of Common Stock; (ii) ACOF VI Frontier AIV A2 owns 89,581 shares of Common Stock; (iii) ACOF VI Frontier AIV A3 owns 20,902 shares of Common Stock; (iv) ACOF VI Frontier AIV A4 owns 271,730 shares of Common Stock; (v) ACOF VI Frontier AIV A5 owns 298,604 shares of Common Stock; (vi) ACOF VI Frontier AIV A6 owns 167,219 shares of Common Stock; (vii) ACOF VI Frontier AIV A7 owns 302,616 shares of Common Stock; (viii) ACOF VI Frontier AIV A8 owns shares 303,979 of Common Stock; (continued in next footnote)

F7 · ownership.nature: (ix) ACOF VI Frontier AIV A9 owns 285,466 shares of Common Stock; (x) ACOF VI Frontier AIV A10 owns 90,268 shares of Common Stock; (xi) ACOF VI Frontier AIV B1 owns 15,068,130 shares of Common Stock;(xii) ASOF Frontier AIV A1 owns 105,592 shares of Common Stock; (xiii) ASOF Frontier AIV A2 owns 18,032 shares of Common Stock; (xiv) ASOF Frontier AIV A3 owns 830,837 shares of Common Stock; (xv) ASOF Frontier AIV A4 owns 281,844 shares of Common Stock; (xvi) ASOF Frontier AIV A5 owns 167,160 shares of Common Stock; (xvii) ASOF Frontier AIV A6 owns 292,124 shares of Common Stock; (xviii) ASOF Frontier AIV A7 owns 289,417 shares of Common Stock; (xix) ASOF Frontier AIV A8 owns 238,026 shares of Common Stock; (xx) ASOF Frontier AIV A9 owns 360,644 shares of Common Stock; (xxi) ASOF Frontier AIV A10 owns 259,665 shares of Common Stock; (xxii) ASOF Frontier AIV A11 owns 245,236 shares of Common Stock; (continued in next footnote)

F8 · ownership.nature: (xiii) ASOF Frontier AIV B1 owns 9,597,579 shares of Common Stock; (xxiv) ASSF IV AIV B Holdings III owns 2,694,242 shares of Common Stock; and (xxv) ASSF IV AIV B directly or indirectly owns 2,654,041 shares of Common Stock. Because the aggregate number of shares of Common Stock sold by Ares Direct Holders in the Transfers equals the number of shares of Common Stock purchased by Ares Direct Holders in the Transfers, the total number of shares of Common Stock that Ares Management LLC (as well as ACOF Investment Management, ASOF Investment Management, ASSF Operating Manager, Ares Management Holdings, Ares Holdco, Ares Management Corporation, Ares Management GP, Ares Voting and Ares Partners Holdco), may be deemed to beneficially own did not change as a result of the Transfers.

F9 · ownership.nature: ACOF Investment Management is the manager of the ACOF Funds, ASOF Investment Management is the manager of ASOF Funds, ASSF Operating Manager is the manager of the ASSF Funds. Ares Management LLC is the sole member of ACOF Investment Management and ASOF Investment Management and the general partner of ASSF Operating Manager. Ares Management LLC has direct or indirect power to vote and/or dispose of the shares of Common Stock held by each Ares Direct Holder, and accordingly, Ares Management LLC may be deemed to have beneficial ownership of the shares of Common Stock reported herein. The sole member of Ares Management LLC is Ares Management Holdings and the general partner of Ares Management Holdings is Ares Holdco.

F10 · ownership.nature: The sole member of Ares Holdco is Ares Management. Ares Management GP is the sole holder of the Class B common stock, $0.01 par value per share, of Ares Management (the "Ares Class B Common Stock") and Ares Voting is the sole holder of the Class C common stock, $0.01 par value per share, of Ares Management (the "Ares Class C Common Stock"). (continued in next footnote)

F11 · ownership.nature: Pursuant to Ares Management's Certificate of Incorporation, the holders of the Ares Class B Common Stock and the Ares Class C Common Stock, collectively, will generally have the majority of the votes on any matter submitted to the stockholders of Ares Management if certain conditions are met. The sole member of both Ares Management GP and Ares Voting is Ares Partners. Ares Partners is managed by a board of managers, which is composed of Michael Arougheti, Ryan Berry, R. Kipp deVeer, David Kaplan, Antony Ressler and Bennett Rosenthal (collectively, the "Board Members"). Mr. Ressler generally has veto authority over decisions by the Board Members. (continued in next footnote)

F12 · ownership.nature: Each of the Reporting Persons, and the Board Members, and the other directors, officers, partners, stockholders, members and managers of the Reporting Persons, expressly disclaims beneficial ownership of the Common Stock, except to the extent of any pecuniary interest therein, and this Form 4 shall not be deemed an admission that any such person or entity is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purposes.

F13 · ownership.nature: The Reporting Persons' beneficial ownership includes a collective total of 85 previously unreported shares of Common Stock, of which the Reporting Persons were notified by their custodian after those shares' initial acquisition date.

SEC source: 0001104659-21-120390 · tm2128492-1_4seq1.xml · nonDerivative · entry 10

ARES MANAGEMENT LLC · CIK 0001259313 · 10% owner

ACOF VI Frontier AIV A1, L.P. · CIK 0001862494 · 10% owner

ACOF VI Frontier AIV A2, L.P. · CIK 0001862499 · 10% owner

ACOF VI Frontier AIV A3, L.P. · CIK 0001862534 · 10% owner

ACOF VI Frontier AIV A4, L.P. · CIK 0001862529 · 10% owner

ACOF VI Frontier AIV A5, L.P. · CIK 0001862526 · 10% owner

ACOF VI Frontier AIV A6, L.P. · CIK 0001862483 · 10% owner

ACOF VI Frontier AIV A7, L.P. · CIK 0001862482 · 10% owner

ACOF VI Frontier AIV A8, L.P. · CIK 0001862505 · 10% owner

ACOF VI Frontier AIV A9, L.P. · CIK 0001862533 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · By ASOF Frontier AIV A10, L.P.

Disclosed balance after: 259,665

F1 · kind: These transactions reflect inter-fund transfers (the "Transfers") of shares of the Issuer's Common Stock from one Ares Direct Holder (as defined below) to another Ares Direct Holder in connection with an internal rebalancing of such Ares Direct Holders' holdings of Common Stock. Each Transfer occurred at the same time and at the same price.

F2 · balance_after: This statement is being filed by ACOF VI Frontier AIV A1, L.P. ("ACOF VI Frontier AIV A1"), ACOF VI Frontier AIV A2, L.P. ("ACOF VI Frontier AIV A2"), ACOF VI Frontier AIV A3, L.P. ("ACOF VI Frontier AIV A3"), ACOF VI Frontier AIV A4, L.P. ("ACOF VI Frontier AIV A4"), ACOF VI Frontier AIV A5, L.P. ("ACOF VI Frontier AIV A5"), ACOF VI Frontier AIV A6, L.P. ("ACOF VI Frontier AIV A6"), ACOF VI Frontier AIV A7, L.P. ("ACOF VI Frontier AIV A7"), ACOF VI Frontier AIV A8, L.P. ("ACOF VI Frontier AIV A8"), ACOF VI Frontier AIV A9, L.P. ("ACOF VI Frontier AIV A9"), ACOF VI Frontier AIV A10, L.P. ("ACOF VI Frontier AIV A10"), and ACOF VI Frontier AIV B1, L.P. ("ACOF VI Frontier AIV B1", together with the foregoing entities, the "ACOF Funds"), (continued in next footnote)

F3 · balance_after: ASOF Frontier AIV A1, L.P. ("ASOF Frontier AIV A1"), ASOF Frontier AIV A2, L.P. ("ASOF Frontier AIV A2"), ASOF Frontier AIV A3, L.P. ("ASOF Frontier AIV A3"), ASOF Frontier AIV A4, L.P. ("ASOF Frontier AIV A4"), ASOF Frontier AIV A5, L.P. ("ASOF Frontier AIV A5"), ASOF Frontier AIV A6, L.P. ("ASOF Frontier AIV A6"), ASOF Frontier AIV A7, L.P. ("ASOF Frontier AIV A7"), ASOF Frontier AIV A8, L.P. ("ASOF Frontier AIV A8"), ASOF Frontier AIV A9, L.P. ("ASOF Frontier AIV A9"), ASOF Frontier AIV A10, L.P. ("ASOF Frontier AIV A10"), ASOF Frontier AIV A11, L.P. ("ASOF Frontier AIV A11"), (continued in next footnote)

F4 · balance_after: and ASOF Frontier AIV B1, L.P. ("ASOF Frontier AIV B1", together with ASOF Frontier AIV A1, ASOF Frontier AIV A2, ASOF Frontier AIV A3, ASOF Frontier AIV A4, ASOF Frontier AIV A5, ASOF Frontier AIV A6, ASOF Frontier AIV A7, ASOF Frontier AIV A8, ASOF Frontier AIV A9, ASOF Frontier AIV A10, and ASOF Frontier AIV A11, the "ASOF Funds"), ASSF IV AIV B Holdings III, L.P. ("ASSF IV AIV B Holdings III"), ASSF IV AIV B, L.P. ("ASSF IV AIV B", and together with ASSF IV AIV B Holdings III, the "ASSF Funds", and together with the ACOF Funds, and the ASOF Funds, the "Ares Direct Holders"), (continued in next footnote)

F5 · balance_after: ACOF Investment Management LLC ("ACOF Investment Management"), ASOF Investment Management LLC ("ASOF Investment Management"), ASSF Operating Manager IV, L.P. ("ASSF Operating Manager"), Ares Management LLC, Ares Management Holdings L.P. ("Ares Management Holdings"), Ares Holdco LLC ("Ares Holdco"), Ares Management Corporation ("Ares Management"), Ares Management GP LLC ("Ares Management GP"), Ares Voting LLC ("Ares Voting") and Ares Partners Holdco LLC ("Ares Partners", and together with the Ares Direct Holders, ACOF Investment Management, ASOF Investment Management, ASSF Operating Manager, Ares Management LLC, Ares Management Holdings, Ares Holdco, Ares Management, Ares Management GP, and Ares Voting, the "Reporting Persons"). Due to the electronic system's limitation of 10 Reporting Persons per joint filing, this statement is being filed in four parts.

F6 · balance_after: The Reporting Persons collectively beneficially own, or may be deemed to beneficially own, in the aggregate 35,205,125 shares of Common Stock (which aggregate ownership did not change as a result of the Transfers) by reason of the direct or indirect beneficial ownership of such shares as follows: (i) ACOF VI Frontier AIV A1 owns 249,805 shares of Common Stock; (ii) ACOF VI Frontier AIV A2 owns 89,581 shares of Common Stock; (iii) ACOF VI Frontier AIV A3 owns 20,902 shares of Common Stock; (iv) ACOF VI Frontier AIV A4 owns 271,730 shares of Common Stock; (v) ACOF VI Frontier AIV A5 owns 298,604 shares of Common Stock; (vi) ACOF VI Frontier AIV A6 owns 167,219 shares of Common Stock; (vii) ACOF VI Frontier AIV A7 owns 302,616 shares of Common Stock; (viii) ACOF VI Frontier AIV A8 owns shares 303,979 of Common Stock; (continued in next footnote)

F7 · balance_after: (ix) ACOF VI Frontier AIV A9 owns 285,466 shares of Common Stock; (x) ACOF VI Frontier AIV A10 owns 90,268 shares of Common Stock; (xi) ACOF VI Frontier AIV B1 owns 15,068,130 shares of Common Stock;(xii) ASOF Frontier AIV A1 owns 105,592 shares of Common Stock; (xiii) ASOF Frontier AIV A2 owns 18,032 shares of Common Stock; (xiv) ASOF Frontier AIV A3 owns 830,837 shares of Common Stock; (xv) ASOF Frontier AIV A4 owns 281,844 shares of Common Stock; (xvi) ASOF Frontier AIV A5 owns 167,160 shares of Common Stock; (xvii) ASOF Frontier AIV A6 owns 292,124 shares of Common Stock; (xviii) ASOF Frontier AIV A7 owns 289,417 shares of Common Stock; (xix) ASOF Frontier AIV A8 owns 238,026 shares of Common Stock; (xx) ASOF Frontier AIV A9 owns 360,644 shares of Common Stock; (xxi) ASOF Frontier AIV A10 owns 259,665 shares of Common Stock; (xxii) ASOF Frontier AIV A11 owns 245,236 shares of Common Stock; (continued in next footnote)

F8 · balance_after: (xiii) ASOF Frontier AIV B1 owns 9,597,579 shares of Common Stock; (xxiv) ASSF IV AIV B Holdings III owns 2,694,242 shares of Common Stock; and (xxv) ASSF IV AIV B directly or indirectly owns 2,654,041 shares of Common Stock. Because the aggregate number of shares of Common Stock sold by Ares Direct Holders in the Transfers equals the number of shares of Common Stock purchased by Ares Direct Holders in the Transfers, the total number of shares of Common Stock that Ares Management LLC (as well as ACOF Investment Management, ASOF Investment Management, ASSF Operating Manager, Ares Management Holdings, Ares Holdco, Ares Management Corporation, Ares Management GP, Ares Voting and Ares Partners Holdco), may be deemed to beneficially own did not change as a result of the Transfers.

F9 · balance_after: ACOF Investment Management is the manager of the ACOF Funds, ASOF Investment Management is the manager of ASOF Funds, ASSF Operating Manager is the manager of the ASSF Funds. Ares Management LLC is the sole member of ACOF Investment Management and ASOF Investment Management and the general partner of ASSF Operating Manager. Ares Management LLC has direct or indirect power to vote and/or dispose of the shares of Common Stock held by each Ares Direct Holder, and accordingly, Ares Management LLC may be deemed to have beneficial ownership of the shares of Common Stock reported herein. The sole member of Ares Management LLC is Ares Management Holdings and the general partner of Ares Management Holdings is Ares Holdco.

F10 · balance_after: The sole member of Ares Holdco is Ares Management. Ares Management GP is the sole holder of the Class B common stock, $0.01 par value per share, of Ares Management (the "Ares Class B Common Stock") and Ares Voting is the sole holder of the Class C common stock, $0.01 par value per share, of Ares Management (the "Ares Class C Common Stock"). (continued in next footnote)

F11 · balance_after: Pursuant to Ares Management's Certificate of Incorporation, the holders of the Ares Class B Common Stock and the Ares Class C Common Stock, collectively, will generally have the majority of the votes on any matter submitted to the stockholders of Ares Management if certain conditions are met. The sole member of both Ares Management GP and Ares Voting is Ares Partners. Ares Partners is managed by a board of managers, which is composed of Michael Arougheti, Ryan Berry, R. Kipp deVeer, David Kaplan, Antony Ressler and Bennett Rosenthal (collectively, the "Board Members"). Mr. Ressler generally has veto authority over decisions by the Board Members. (continued in next footnote)

F12 · balance_after: Each of the Reporting Persons, and the Board Members, and the other directors, officers, partners, stockholders, members and managers of the Reporting Persons, expressly disclaims beneficial ownership of the Common Stock, except to the extent of any pecuniary interest therein, and this Form 4 shall not be deemed an admission that any such person or entity is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purposes.

F13 · balance_after: The Reporting Persons' beneficial ownership includes a collective total of 85 previously unreported shares of Common Stock, of which the Reporting Persons were notified by their custodian after those shares' initial acquisition date.

F2 · ownership.nature: This statement is being filed by ACOF VI Frontier AIV A1, L.P. ("ACOF VI Frontier AIV A1"), ACOF VI Frontier AIV A2, L.P. ("ACOF VI Frontier AIV A2"), ACOF VI Frontier AIV A3, L.P. ("ACOF VI Frontier AIV A3"), ACOF VI Frontier AIV A4, L.P. ("ACOF VI Frontier AIV A4"), ACOF VI Frontier AIV A5, L.P. ("ACOF VI Frontier AIV A5"), ACOF VI Frontier AIV A6, L.P. ("ACOF VI Frontier AIV A6"), ACOF VI Frontier AIV A7, L.P. ("ACOF VI Frontier AIV A7"), ACOF VI Frontier AIV A8, L.P. ("ACOF VI Frontier AIV A8"), ACOF VI Frontier AIV A9, L.P. ("ACOF VI Frontier AIV A9"), ACOF VI Frontier AIV A10, L.P. ("ACOF VI Frontier AIV A10"), and ACOF VI Frontier AIV B1, L.P. ("ACOF VI Frontier AIV B1", together with the foregoing entities, the "ACOF Funds"), (continued in next footnote)

F3 · ownership.nature: ASOF Frontier AIV A1, L.P. ("ASOF Frontier AIV A1"), ASOF Frontier AIV A2, L.P. ("ASOF Frontier AIV A2"), ASOF Frontier AIV A3, L.P. ("ASOF Frontier AIV A3"), ASOF Frontier AIV A4, L.P. ("ASOF Frontier AIV A4"), ASOF Frontier AIV A5, L.P. ("ASOF Frontier AIV A5"), ASOF Frontier AIV A6, L.P. ("ASOF Frontier AIV A6"), ASOF Frontier AIV A7, L.P. ("ASOF Frontier AIV A7"), ASOF Frontier AIV A8, L.P. ("ASOF Frontier AIV A8"), ASOF Frontier AIV A9, L.P. ("ASOF Frontier AIV A9"), ASOF Frontier AIV A10, L.P. ("ASOF Frontier AIV A10"), ASOF Frontier AIV A11, L.P. ("ASOF Frontier AIV A11"), (continued in next footnote)

F4 · ownership.nature: and ASOF Frontier AIV B1, L.P. ("ASOF Frontier AIV B1", together with ASOF Frontier AIV A1, ASOF Frontier AIV A2, ASOF Frontier AIV A3, ASOF Frontier AIV A4, ASOF Frontier AIV A5, ASOF Frontier AIV A6, ASOF Frontier AIV A7, ASOF Frontier AIV A8, ASOF Frontier AIV A9, ASOF Frontier AIV A10, and ASOF Frontier AIV A11, the "ASOF Funds"), ASSF IV AIV B Holdings III, L.P. ("ASSF IV AIV B Holdings III"), ASSF IV AIV B, L.P. ("ASSF IV AIV B", and together with ASSF IV AIV B Holdings III, the "ASSF Funds", and together with the ACOF Funds, and the ASOF Funds, the "Ares Direct Holders"), (continued in next footnote)

F5 · ownership.nature: ACOF Investment Management LLC ("ACOF Investment Management"), ASOF Investment Management LLC ("ASOF Investment Management"), ASSF Operating Manager IV, L.P. ("ASSF Operating Manager"), Ares Management LLC, Ares Management Holdings L.P. ("Ares Management Holdings"), Ares Holdco LLC ("Ares Holdco"), Ares Management Corporation ("Ares Management"), Ares Management GP LLC ("Ares Management GP"), Ares Voting LLC ("Ares Voting") and Ares Partners Holdco LLC ("Ares Partners", and together with the Ares Direct Holders, ACOF Investment Management, ASOF Investment Management, ASSF Operating Manager, Ares Management LLC, Ares Management Holdings, Ares Holdco, Ares Management, Ares Management GP, and Ares Voting, the "Reporting Persons"). Due to the electronic system's limitation of 10 Reporting Persons per joint filing, this statement is being filed in four parts.

F6 · ownership.nature: The Reporting Persons collectively beneficially own, or may be deemed to beneficially own, in the aggregate 35,205,125 shares of Common Stock (which aggregate ownership did not change as a result of the Transfers) by reason of the direct or indirect beneficial ownership of such shares as follows: (i) ACOF VI Frontier AIV A1 owns 249,805 shares of Common Stock; (ii) ACOF VI Frontier AIV A2 owns 89,581 shares of Common Stock; (iii) ACOF VI Frontier AIV A3 owns 20,902 shares of Common Stock; (iv) ACOF VI Frontier AIV A4 owns 271,730 shares of Common Stock; (v) ACOF VI Frontier AIV A5 owns 298,604 shares of Common Stock; (vi) ACOF VI Frontier AIV A6 owns 167,219 shares of Common Stock; (vii) ACOF VI Frontier AIV A7 owns 302,616 shares of Common Stock; (viii) ACOF VI Frontier AIV A8 owns shares 303,979 of Common Stock; (continued in next footnote)

F7 · ownership.nature: (ix) ACOF VI Frontier AIV A9 owns 285,466 shares of Common Stock; (x) ACOF VI Frontier AIV A10 owns 90,268 shares of Common Stock; (xi) ACOF VI Frontier AIV B1 owns 15,068,130 shares of Common Stock;(xii) ASOF Frontier AIV A1 owns 105,592 shares of Common Stock; (xiii) ASOF Frontier AIV A2 owns 18,032 shares of Common Stock; (xiv) ASOF Frontier AIV A3 owns 830,837 shares of Common Stock; (xv) ASOF Frontier AIV A4 owns 281,844 shares of Common Stock; (xvi) ASOF Frontier AIV A5 owns 167,160 shares of Common Stock; (xvii) ASOF Frontier AIV A6 owns 292,124 shares of Common Stock; (xviii) ASOF Frontier AIV A7 owns 289,417 shares of Common Stock; (xix) ASOF Frontier AIV A8 owns 238,026 shares of Common Stock; (xx) ASOF Frontier AIV A9 owns 360,644 shares of Common Stock; (xxi) ASOF Frontier AIV A10 owns 259,665 shares of Common Stock; (xxii) ASOF Frontier AIV A11 owns 245,236 shares of Common Stock; (continued in next footnote)

F8 · ownership.nature: (xiii) ASOF Frontier AIV B1 owns 9,597,579 shares of Common Stock; (xxiv) ASSF IV AIV B Holdings III owns 2,694,242 shares of Common Stock; and (xxv) ASSF IV AIV B directly or indirectly owns 2,654,041 shares of Common Stock. Because the aggregate number of shares of Common Stock sold by Ares Direct Holders in the Transfers equals the number of shares of Common Stock purchased by Ares Direct Holders in the Transfers, the total number of shares of Common Stock that Ares Management LLC (as well as ACOF Investment Management, ASOF Investment Management, ASSF Operating Manager, Ares Management Holdings, Ares Holdco, Ares Management Corporation, Ares Management GP, Ares Voting and Ares Partners Holdco), may be deemed to beneficially own did not change as a result of the Transfers.

F9 · ownership.nature: ACOF Investment Management is the manager of the ACOF Funds, ASOF Investment Management is the manager of ASOF Funds, ASSF Operating Manager is the manager of the ASSF Funds. Ares Management LLC is the sole member of ACOF Investment Management and ASOF Investment Management and the general partner of ASSF Operating Manager. Ares Management LLC has direct or indirect power to vote and/or dispose of the shares of Common Stock held by each Ares Direct Holder, and accordingly, Ares Management LLC may be deemed to have beneficial ownership of the shares of Common Stock reported herein. The sole member of Ares Management LLC is Ares Management Holdings and the general partner of Ares Management Holdings is Ares Holdco.

F10 · ownership.nature: The sole member of Ares Holdco is Ares Management. Ares Management GP is the sole holder of the Class B common stock, $0.01 par value per share, of Ares Management (the "Ares Class B Common Stock") and Ares Voting is the sole holder of the Class C common stock, $0.01 par value per share, of Ares Management (the "Ares Class C Common Stock"). (continued in next footnote)

F11 · ownership.nature: Pursuant to Ares Management's Certificate of Incorporation, the holders of the Ares Class B Common Stock and the Ares Class C Common Stock, collectively, will generally have the majority of the votes on any matter submitted to the stockholders of Ares Management if certain conditions are met. The sole member of both Ares Management GP and Ares Voting is Ares Partners. Ares Partners is managed by a board of managers, which is composed of Michael Arougheti, Ryan Berry, R. Kipp deVeer, David Kaplan, Antony Ressler and Bennett Rosenthal (collectively, the "Board Members"). Mr. Ressler generally has veto authority over decisions by the Board Members. (continued in next footnote)

F12 · ownership.nature: Each of the Reporting Persons, and the Board Members, and the other directors, officers, partners, stockholders, members and managers of the Reporting Persons, expressly disclaims beneficial ownership of the Common Stock, except to the extent of any pecuniary interest therein, and this Form 4 shall not be deemed an admission that any such person or entity is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purposes.

F13 · ownership.nature: The Reporting Persons' beneficial ownership includes a collective total of 85 previously unreported shares of Common Stock, of which the Reporting Persons were notified by their custodian after those shares' initial acquisition date.

SEC source: 0001104659-21-120390 · tm2128492-1_4seq1.xml · nonDerivative · entry 9

ARES MANAGEMENT LLC · CIK 0001259313 · 10% owner

ACOF VI Frontier AIV A1, L.P. · CIK 0001862494 · 10% owner

ACOF VI Frontier AIV A2, L.P. · CIK 0001862499 · 10% owner

ACOF VI Frontier AIV A3, L.P. · CIK 0001862534 · 10% owner

ACOF VI Frontier AIV A4, L.P. · CIK 0001862529 · 10% owner

ACOF VI Frontier AIV A5, L.P. · CIK 0001862526 · 10% owner

ACOF VI Frontier AIV A6, L.P. · CIK 0001862483 · 10% owner

ACOF VI Frontier AIV A7, L.P. · CIK 0001862482 · 10% owner

ACOF VI Frontier AIV A8, L.P. · CIK 0001862505 · 10% owner

ACOF VI Frontier AIV A9, L.P. · CIK 0001862533 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · By ASOF Frontier AIV A9, L.P.

Disclosed balance after: 360,644

F1 · kind: These transactions reflect inter-fund transfers (the "Transfers") of shares of the Issuer's Common Stock from one Ares Direct Holder (as defined below) to another Ares Direct Holder in connection with an internal rebalancing of such Ares Direct Holders' holdings of Common Stock. Each Transfer occurred at the same time and at the same price.

F2 · balance_after: This statement is being filed by ACOF VI Frontier AIV A1, L.P. ("ACOF VI Frontier AIV A1"), ACOF VI Frontier AIV A2, L.P. ("ACOF VI Frontier AIV A2"), ACOF VI Frontier AIV A3, L.P. ("ACOF VI Frontier AIV A3"), ACOF VI Frontier AIV A4, L.P. ("ACOF VI Frontier AIV A4"), ACOF VI Frontier AIV A5, L.P. ("ACOF VI Frontier AIV A5"), ACOF VI Frontier AIV A6, L.P. ("ACOF VI Frontier AIV A6"), ACOF VI Frontier AIV A7, L.P. ("ACOF VI Frontier AIV A7"), ACOF VI Frontier AIV A8, L.P. ("ACOF VI Frontier AIV A8"), ACOF VI Frontier AIV A9, L.P. ("ACOF VI Frontier AIV A9"), ACOF VI Frontier AIV A10, L.P. ("ACOF VI Frontier AIV A10"), and ACOF VI Frontier AIV B1, L.P. ("ACOF VI Frontier AIV B1", together with the foregoing entities, the "ACOF Funds"), (continued in next footnote)

F3 · balance_after: ASOF Frontier AIV A1, L.P. ("ASOF Frontier AIV A1"), ASOF Frontier AIV A2, L.P. ("ASOF Frontier AIV A2"), ASOF Frontier AIV A3, L.P. ("ASOF Frontier AIV A3"), ASOF Frontier AIV A4, L.P. ("ASOF Frontier AIV A4"), ASOF Frontier AIV A5, L.P. ("ASOF Frontier AIV A5"), ASOF Frontier AIV A6, L.P. ("ASOF Frontier AIV A6"), ASOF Frontier AIV A7, L.P. ("ASOF Frontier AIV A7"), ASOF Frontier AIV A8, L.P. ("ASOF Frontier AIV A8"), ASOF Frontier AIV A9, L.P. ("ASOF Frontier AIV A9"), ASOF Frontier AIV A10, L.P. ("ASOF Frontier AIV A10"), ASOF Frontier AIV A11, L.P. ("ASOF Frontier AIV A11"), (continued in next footnote)

F4 · balance_after: and ASOF Frontier AIV B1, L.P. ("ASOF Frontier AIV B1", together with ASOF Frontier AIV A1, ASOF Frontier AIV A2, ASOF Frontier AIV A3, ASOF Frontier AIV A4, ASOF Frontier AIV A5, ASOF Frontier AIV A6, ASOF Frontier AIV A7, ASOF Frontier AIV A8, ASOF Frontier AIV A9, ASOF Frontier AIV A10, and ASOF Frontier AIV A11, the "ASOF Funds"), ASSF IV AIV B Holdings III, L.P. ("ASSF IV AIV B Holdings III"), ASSF IV AIV B, L.P. ("ASSF IV AIV B", and together with ASSF IV AIV B Holdings III, the "ASSF Funds", and together with the ACOF Funds, and the ASOF Funds, the "Ares Direct Holders"), (continued in next footnote)

F5 · balance_after: ACOF Investment Management LLC ("ACOF Investment Management"), ASOF Investment Management LLC ("ASOF Investment Management"), ASSF Operating Manager IV, L.P. ("ASSF Operating Manager"), Ares Management LLC, Ares Management Holdings L.P. ("Ares Management Holdings"), Ares Holdco LLC ("Ares Holdco"), Ares Management Corporation ("Ares Management"), Ares Management GP LLC ("Ares Management GP"), Ares Voting LLC ("Ares Voting") and Ares Partners Holdco LLC ("Ares Partners", and together with the Ares Direct Holders, ACOF Investment Management, ASOF Investment Management, ASSF Operating Manager, Ares Management LLC, Ares Management Holdings, Ares Holdco, Ares Management, Ares Management GP, and Ares Voting, the "Reporting Persons"). Due to the electronic system's limitation of 10 Reporting Persons per joint filing, this statement is being filed in four parts.

F6 · balance_after: The Reporting Persons collectively beneficially own, or may be deemed to beneficially own, in the aggregate 35,205,125 shares of Common Stock (which aggregate ownership did not change as a result of the Transfers) by reason of the direct or indirect beneficial ownership of such shares as follows: (i) ACOF VI Frontier AIV A1 owns 249,805 shares of Common Stock; (ii) ACOF VI Frontier AIV A2 owns 89,581 shares of Common Stock; (iii) ACOF VI Frontier AIV A3 owns 20,902 shares of Common Stock; (iv) ACOF VI Frontier AIV A4 owns 271,730 shares of Common Stock; (v) ACOF VI Frontier AIV A5 owns 298,604 shares of Common Stock; (vi) ACOF VI Frontier AIV A6 owns 167,219 shares of Common Stock; (vii) ACOF VI Frontier AIV A7 owns 302,616 shares of Common Stock; (viii) ACOF VI Frontier AIV A8 owns shares 303,979 of Common Stock; (continued in next footnote)

F7 · balance_after: (ix) ACOF VI Frontier AIV A9 owns 285,466 shares of Common Stock; (x) ACOF VI Frontier AIV A10 owns 90,268 shares of Common Stock; (xi) ACOF VI Frontier AIV B1 owns 15,068,130 shares of Common Stock;(xii) ASOF Frontier AIV A1 owns 105,592 shares of Common Stock; (xiii) ASOF Frontier AIV A2 owns 18,032 shares of Common Stock; (xiv) ASOF Frontier AIV A3 owns 830,837 shares of Common Stock; (xv) ASOF Frontier AIV A4 owns 281,844 shares of Common Stock; (xvi) ASOF Frontier AIV A5 owns 167,160 shares of Common Stock; (xvii) ASOF Frontier AIV A6 owns 292,124 shares of Common Stock; (xviii) ASOF Frontier AIV A7 owns 289,417 shares of Common Stock; (xix) ASOF Frontier AIV A8 owns 238,026 shares of Common Stock; (xx) ASOF Frontier AIV A9 owns 360,644 shares of Common Stock; (xxi) ASOF Frontier AIV A10 owns 259,665 shares of Common Stock; (xxii) ASOF Frontier AIV A11 owns 245,236 shares of Common Stock; (continued in next footnote)

F8 · balance_after: (xiii) ASOF Frontier AIV B1 owns 9,597,579 shares of Common Stock; (xxiv) ASSF IV AIV B Holdings III owns 2,694,242 shares of Common Stock; and (xxv) ASSF IV AIV B directly or indirectly owns 2,654,041 shares of Common Stock. Because the aggregate number of shares of Common Stock sold by Ares Direct Holders in the Transfers equals the number of shares of Common Stock purchased by Ares Direct Holders in the Transfers, the total number of shares of Common Stock that Ares Management LLC (as well as ACOF Investment Management, ASOF Investment Management, ASSF Operating Manager, Ares Management Holdings, Ares Holdco, Ares Management Corporation, Ares Management GP, Ares Voting and Ares Partners Holdco), may be deemed to beneficially own did not change as a result of the Transfers.

F9 · balance_after: ACOF Investment Management is the manager of the ACOF Funds, ASOF Investment Management is the manager of ASOF Funds, ASSF Operating Manager is the manager of the ASSF Funds. Ares Management LLC is the sole member of ACOF Investment Management and ASOF Investment Management and the general partner of ASSF Operating Manager. Ares Management LLC has direct or indirect power to vote and/or dispose of the shares of Common Stock held by each Ares Direct Holder, and accordingly, Ares Management LLC may be deemed to have beneficial ownership of the shares of Common Stock reported herein. The sole member of Ares Management LLC is Ares Management Holdings and the general partner of Ares Management Holdings is Ares Holdco.

F10 · balance_after: The sole member of Ares Holdco is Ares Management. Ares Management GP is the sole holder of the Class B common stock, $0.01 par value per share, of Ares Management (the "Ares Class B Common Stock") and Ares Voting is the sole holder of the Class C common stock, $0.01 par value per share, of Ares Management (the "Ares Class C Common Stock"). (continued in next footnote)

F11 · balance_after: Pursuant to Ares Management's Certificate of Incorporation, the holders of the Ares Class B Common Stock and the Ares Class C Common Stock, collectively, will generally have the majority of the votes on any matter submitted to the stockholders of Ares Management if certain conditions are met. The sole member of both Ares Management GP and Ares Voting is Ares Partners. Ares Partners is managed by a board of managers, which is composed of Michael Arougheti, Ryan Berry, R. Kipp deVeer, David Kaplan, Antony Ressler and Bennett Rosenthal (collectively, the "Board Members"). Mr. Ressler generally has veto authority over decisions by the Board Members. (continued in next footnote)

F12 · balance_after: Each of the Reporting Persons, and the Board Members, and the other directors, officers, partners, stockholders, members and managers of the Reporting Persons, expressly disclaims beneficial ownership of the Common Stock, except to the extent of any pecuniary interest therein, and this Form 4 shall not be deemed an admission that any such person or entity is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purposes.

F13 · balance_after: The Reporting Persons' beneficial ownership includes a collective total of 85 previously unreported shares of Common Stock, of which the Reporting Persons were notified by their custodian after those shares' initial acquisition date.

F2 · ownership.nature: This statement is being filed by ACOF VI Frontier AIV A1, L.P. ("ACOF VI Frontier AIV A1"), ACOF VI Frontier AIV A2, L.P. ("ACOF VI Frontier AIV A2"), ACOF VI Frontier AIV A3, L.P. ("ACOF VI Frontier AIV A3"), ACOF VI Frontier AIV A4, L.P. ("ACOF VI Frontier AIV A4"), ACOF VI Frontier AIV A5, L.P. ("ACOF VI Frontier AIV A5"), ACOF VI Frontier AIV A6, L.P. ("ACOF VI Frontier AIV A6"), ACOF VI Frontier AIV A7, L.P. ("ACOF VI Frontier AIV A7"), ACOF VI Frontier AIV A8, L.P. ("ACOF VI Frontier AIV A8"), ACOF VI Frontier AIV A9, L.P. ("ACOF VI Frontier AIV A9"), ACOF VI Frontier AIV A10, L.P. ("ACOF VI Frontier AIV A10"), and ACOF VI Frontier AIV B1, L.P. ("ACOF VI Frontier AIV B1", together with the foregoing entities, the "ACOF Funds"), (continued in next footnote)

F3 · ownership.nature: ASOF Frontier AIV A1, L.P. ("ASOF Frontier AIV A1"), ASOF Frontier AIV A2, L.P. ("ASOF Frontier AIV A2"), ASOF Frontier AIV A3, L.P. ("ASOF Frontier AIV A3"), ASOF Frontier AIV A4, L.P. ("ASOF Frontier AIV A4"), ASOF Frontier AIV A5, L.P. ("ASOF Frontier AIV A5"), ASOF Frontier AIV A6, L.P. ("ASOF Frontier AIV A6"), ASOF Frontier AIV A7, L.P. ("ASOF Frontier AIV A7"), ASOF Frontier AIV A8, L.P. ("ASOF Frontier AIV A8"), ASOF Frontier AIV A9, L.P. ("ASOF Frontier AIV A9"), ASOF Frontier AIV A10, L.P. ("ASOF Frontier AIV A10"), ASOF Frontier AIV A11, L.P. ("ASOF Frontier AIV A11"), (continued in next footnote)

F4 · ownership.nature: and ASOF Frontier AIV B1, L.P. ("ASOF Frontier AIV B1", together with ASOF Frontier AIV A1, ASOF Frontier AIV A2, ASOF Frontier AIV A3, ASOF Frontier AIV A4, ASOF Frontier AIV A5, ASOF Frontier AIV A6, ASOF Frontier AIV A7, ASOF Frontier AIV A8, ASOF Frontier AIV A9, ASOF Frontier AIV A10, and ASOF Frontier AIV A11, the "ASOF Funds"), ASSF IV AIV B Holdings III, L.P. ("ASSF IV AIV B Holdings III"), ASSF IV AIV B, L.P. ("ASSF IV AIV B", and together with ASSF IV AIV B Holdings III, the "ASSF Funds", and together with the ACOF Funds, and the ASOF Funds, the "Ares Direct Holders"), (continued in next footnote)

F5 · ownership.nature: ACOF Investment Management LLC ("ACOF Investment Management"), ASOF Investment Management LLC ("ASOF Investment Management"), ASSF Operating Manager IV, L.P. ("ASSF Operating Manager"), Ares Management LLC, Ares Management Holdings L.P. ("Ares Management Holdings"), Ares Holdco LLC ("Ares Holdco"), Ares Management Corporation ("Ares Management"), Ares Management GP LLC ("Ares Management GP"), Ares Voting LLC ("Ares Voting") and Ares Partners Holdco LLC ("Ares Partners", and together with the Ares Direct Holders, ACOF Investment Management, ASOF Investment Management, ASSF Operating Manager, Ares Management LLC, Ares Management Holdings, Ares Holdco, Ares Management, Ares Management GP, and Ares Voting, the "Reporting Persons"). Due to the electronic system's limitation of 10 Reporting Persons per joint filing, this statement is being filed in four parts.

F6 · ownership.nature: The Reporting Persons collectively beneficially own, or may be deemed to beneficially own, in the aggregate 35,205,125 shares of Common Stock (which aggregate ownership did not change as a result of the Transfers) by reason of the direct or indirect beneficial ownership of such shares as follows: (i) ACOF VI Frontier AIV A1 owns 249,805 shares of Common Stock; (ii) ACOF VI Frontier AIV A2 owns 89,581 shares of Common Stock; (iii) ACOF VI Frontier AIV A3 owns 20,902 shares of Common Stock; (iv) ACOF VI Frontier AIV A4 owns 271,730 shares of Common Stock; (v) ACOF VI Frontier AIV A5 owns 298,604 shares of Common Stock; (vi) ACOF VI Frontier AIV A6 owns 167,219 shares of Common Stock; (vii) ACOF VI Frontier AIV A7 owns 302,616 shares of Common Stock; (viii) ACOF VI Frontier AIV A8 owns shares 303,979 of Common Stock; (continued in next footnote)

F7 · ownership.nature: (ix) ACOF VI Frontier AIV A9 owns 285,466 shares of Common Stock; (x) ACOF VI Frontier AIV A10 owns 90,268 shares of Common Stock; (xi) ACOF VI Frontier AIV B1 owns 15,068,130 shares of Common Stock;(xii) ASOF Frontier AIV A1 owns 105,592 shares of Common Stock; (xiii) ASOF Frontier AIV A2 owns 18,032 shares of Common Stock; (xiv) ASOF Frontier AIV A3 owns 830,837 shares of Common Stock; (xv) ASOF Frontier AIV A4 owns 281,844 shares of Common Stock; (xvi) ASOF Frontier AIV A5 owns 167,160 shares of Common Stock; (xvii) ASOF Frontier AIV A6 owns 292,124 shares of Common Stock; (xviii) ASOF Frontier AIV A7 owns 289,417 shares of Common Stock; (xix) ASOF Frontier AIV A8 owns 238,026 shares of Common Stock; (xx) ASOF Frontier AIV A9 owns 360,644 shares of Common Stock; (xxi) ASOF Frontier AIV A10 owns 259,665 shares of Common Stock; (xxii) ASOF Frontier AIV A11 owns 245,236 shares of Common Stock; (continued in next footnote)

F8 · ownership.nature: (xiii) ASOF Frontier AIV B1 owns 9,597,579 shares of Common Stock; (xxiv) ASSF IV AIV B Holdings III owns 2,694,242 shares of Common Stock; and (xxv) ASSF IV AIV B directly or indirectly owns 2,654,041 shares of Common Stock. Because the aggregate number of shares of Common Stock sold by Ares Direct Holders in the Transfers equals the number of shares of Common Stock purchased by Ares Direct Holders in the Transfers, the total number of shares of Common Stock that Ares Management LLC (as well as ACOF Investment Management, ASOF Investment Management, ASSF Operating Manager, Ares Management Holdings, Ares Holdco, Ares Management Corporation, Ares Management GP, Ares Voting and Ares Partners Holdco), may be deemed to beneficially own did not change as a result of the Transfers.

F9 · ownership.nature: ACOF Investment Management is the manager of the ACOF Funds, ASOF Investment Management is the manager of ASOF Funds, ASSF Operating Manager is the manager of the ASSF Funds. Ares Management LLC is the sole member of ACOF Investment Management and ASOF Investment Management and the general partner of ASSF Operating Manager. Ares Management LLC has direct or indirect power to vote and/or dispose of the shares of Common Stock held by each Ares Direct Holder, and accordingly, Ares Management LLC may be deemed to have beneficial ownership of the shares of Common Stock reported herein. The sole member of Ares Management LLC is Ares Management Holdings and the general partner of Ares Management Holdings is Ares Holdco.

F10 · ownership.nature: The sole member of Ares Holdco is Ares Management. Ares Management GP is the sole holder of the Class B common stock, $0.01 par value per share, of Ares Management (the "Ares Class B Common Stock") and Ares Voting is the sole holder of the Class C common stock, $0.01 par value per share, of Ares Management (the "Ares Class C Common Stock"). (continued in next footnote)

F11 · ownership.nature: Pursuant to Ares Management's Certificate of Incorporation, the holders of the Ares Class B Common Stock and the Ares Class C Common Stock, collectively, will generally have the majority of the votes on any matter submitted to the stockholders of Ares Management if certain conditions are met. The sole member of both Ares Management GP and Ares Voting is Ares Partners. Ares Partners is managed by a board of managers, which is composed of Michael Arougheti, Ryan Berry, R. Kipp deVeer, David Kaplan, Antony Ressler and Bennett Rosenthal (collectively, the "Board Members"). Mr. Ressler generally has veto authority over decisions by the Board Members. (continued in next footnote)

F12 · ownership.nature: Each of the Reporting Persons, and the Board Members, and the other directors, officers, partners, stockholders, members and managers of the Reporting Persons, expressly disclaims beneficial ownership of the Common Stock, except to the extent of any pecuniary interest therein, and this Form 4 shall not be deemed an admission that any such person or entity is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purposes.

F13 · ownership.nature: The Reporting Persons' beneficial ownership includes a collective total of 85 previously unreported shares of Common Stock, of which the Reporting Persons were notified by their custodian after those shares' initial acquisition date.