AF V Energy I AIV B1, L.P.

SEC source: 0001104659-18-005926 · a4.xml · nonDerivative · entry 1

ARES MANAGEMENT LLC · CIK 0001259313 · Director · 10% owner

AF V Energy I AIV B1, L.P. · CIK 0001705375 · Director · 10% owner

ACOF Investment Management LLC · CIK 0001684171 · Director · 10% owner

Ares Management Holdings L.P. · CIK 0001536937 · Director · 10% owner

Ares Holdco LLC · CIK 0001669983 · Director · 10% owner

Ares Holdings Inc. · CIK 0001620317 · Director · 10% owner

ARES MANAGEMENT LP · CIK 0001176948 · Director · 10% owner

Ares Management GP LLC · CIK 0001620264 · Director · 10% owner

Ares Partners Holdco LLC · CIK 0001620263 · Director · 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: 115,410

F1 · ownership.nature: The amount reported reflects 115,410 shares held by Nathan Walton, which represents shares granted to Mr. Walton in his capacity as a director of the Issuer. Mr. Walton is associated with Ares Management LLC and certain of the other Ares Entities (as defined below). Pursuant to the policies of the Ares Entities, Mr. Walton holds these securities as a nominee on behalf of, and for the sole benefit of, the Ares Entities and has assigned to Ares Management LLC all economic, pecuniary and voting rights in respect of such securities.

SEC source: 0001104659-17-035262 · a4.xml · nonDerivative · entry 1

ARES MANAGEMENT LLC · CIK 0001259313 · Director · 10% owner

AF V Energy I AIV B1, L.P. · CIK 0001705375 · Director · 10% owner

ACOF Investment Management LLC · CIK 0001684171 · Director · 10% owner

Ares Management Holdings L.P. · CIK 0001536937 · Director · 10% owner

Ares Holdco LLC · CIK 0001669983 · Director · 10% owner

Ares Holdings Inc. · CIK 0001620317 · Director · 10% owner

ARES MANAGEMENT LP · CIK 0001176948 · Director · 10% owner

Ares Management GP LLC · CIK 0001620264 · Director · 10% owner

Ares Partners Holdco LLC · CIK 0001620263 · Director · 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: 56,712,088

F1 · shares: The amount reported reflects an aggregate 514,227 shares of the Issuer's common stock, par value $0.001 ("Common Stock") acquired in the following individual amounts: 25,548 shares by AF V Energy I AIV A1, L.P., 25,318 shares by AF V Energy I AIV A2, L.P., 25,348 shares by AF V Energy I AIV A3, L.P., 25,482 shares by AF V Energy I AIV A4, L.P., 25,613 shares by AF V Energy I AIV A5, L.P., 25,453 shares by AF V Energy I AIV A6, L.P., 24,892 shares by AF V Energy I AIV A7, L.P., 25,220 shares by AF V Energy I AIV A8, L.P., 25,548 shares by AF V Energy I AIV A9, L.P., 25,548 shares by AF V Energy I AIV A10, L.P., 25,220 shares by AF V Energy I AIV A11, L.P., 24,892 shares by AF V Energy I AIV A12, L.P., 30,002 shares by AF V Energy I AIV A13, L.P., and 180,143 shares by AF V Energy I AIV B1, L.P.

F2 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $1.20 to $1.26, inclusive. The undersigned undertakes to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the ranges set forth in this footnote.

F3 · ownership.nature: The manager of the entities (collectively, the "Purchasers") identified in footnotes (1) and (6) is ACOF Investment Management LLC ("ACOF"). The sole member of ACOF is Ares Management LLC, and the sole member of Ares Management LLC is Ares Management Holdings L.P. ("Ares Management Holdings") and the general partner of Ares Management Holdings is Ares Holdco LLC ("Ares Holdco"). The sole member of Ares Holdco is Ares Holdings Inc. ("Ares Holdings"), whose sole stockholder is Ares Management, L.P. ("Ares Management").

F4 · ownership.nature: The general partner of Ares Management is Ares Management GP LLC ("Ares Management GP") and the sole member of Ares Management GP is Ares Partners Holdco LLC ("Ares Partners," and together with the Purchasers, ACOF, Ares Management LLC, Ares Management Holdings, Ares Holdco, Ares Holdings, Ares Management, and Ares Management GP, the "Ares Entities"). Ares Partners is managed by a board of managers, which is composed of Michael Arougheti, R. Kipp deVeer, David Kaplan, Antony Ressler and Bennett Rosenthal. (continued in footnote 5)

F5 · ownership.nature: Decisions by Ares Partners' board of managers generally are made by a majority of the members, which majority, subject to certain conditions, must include Antony Ressler. Each of the Ares Entities (other than each Purchaser, with respect to the securities held directly by it) and the members of Ares Partners' board of managers and the other directors, officers, partners, stockholders, members and managers of the Ares Entities expressly disclaims beneficial ownership of the securities reported on this Form 4, 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. The address of each Ares Entity is 2000 Avenue of the Stars, 12th Floor, Los Angeles, CA 90067.

F6 · ownership.nature: The amount reported reflects an aggregate 56,712,088 shares of Common Stock held in the following individual amounts: 2,817,506 shares by AF V Energy I AIV A1, L.P., 2,792,028 shares by AF V Energy I AIV A2, L.P., 2,795,856 shares by AF V Energy I AIV A3, L.P., 2,810,129 shares by AF V Energy I AIV A4, L.P., 2,824,880 shares by AF V Energy I AIV A5, L.P., 2,806,979 shares by AF V Energy I AIV A6, L.P., 2,745,103 shares by AF V Energy I AIV A7, L.P., 2,781,304 shares by AF V Energy I AIV A8, L.P., 2,817,506 shares by AF V Energy I AIV A9, L.P., 2,817,506 shares by AF V Energy I AIV A10, L.P., 2,781,304 shares by AF V Energy I AIV A11, L.P., 2,745,781 shares by AF V Energy I AIV A12, L.P., 3,308,876 shares by AF V Energy I AIV A13, L.P., and 19,867,330 shares by AF V Energy I AIV B1, L.P.

SEC source: 0001104659-17-034387 · a4.xml · nonDerivative · entry 3

ARES MANAGEMENT LLC · CIK 0001259313 · Director · 10% owner

AF V Energy I AIV B1, L.P. · CIK 0001705375 · Director · 10% owner

ACOF Investment Management LLC · CIK 0001684171 · Director · 10% owner

Ares Management Holdings L.P. · CIK 0001536937 · Director · 10% owner

Ares Holdco LLC · CIK 0001669983 · Director · 10% owner

Ares Holdings Inc. · CIK 0001620317 · Director · 10% owner

ARES MANAGEMENT LP · CIK 0001176948 · Director · 10% owner

Ares Management GP LLC · CIK 0001620264 · Director · 10% owner

Ares Partners Holdco LLC · CIK 0001620263 · Director · 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: 56,197,861

F8 · shares: The amount reported reflects an aggregate 514,227 shares of Common Stock acquired in the following individual amounts: 25,548 shares by AF V Energy I AIV A1, L.P., 25,318 shares by AF V Energy I AIV A2, L.P., 25,348 shares by AF V Energy I AIV A3, L.P., 25,482 shares by AF V Energy I AIV A4, L.P., 25,613 shares by AF V Energy I AIV A5, L.P., 25,453 shares by AF V Energy I AIV A6, L.P., 24,892 shares by AF V Energy I AIV A7, L.P., 25,220 shares by AF V Energy I AIV A8, L.P., 25,548 shares by AF V Energy I AIV A9, L.P., 25,548 shares by AF V Energy I AIV A10, L.P., 25,220 shares by AF V Energy I AIV A11, L.P., 24,892 shares by AF V Energy I AIV A12, L.P., 30,002 shares by AF V Energy I AIV A13, L.P., and 180,143 shares by AF V Energy I AIV B1, L.P.

F9 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $1.14 to $1.24, inclusive.

F10 · balance_after: The amount reported reflects an aggregate 56,197,861 shares of Common Stock held in the following individual amounts: 2,791,958 shares by AF V Energy I AIV A1, L.P., 2,766,710 shares by AF V Energy I AIV A2, L.P., 2,770,508 shares by AF V Energy I AIV A3, L.P., 2,784,647 shares by AF V Energy I AIV A4, L.P., 2,799,267 shares by AF V Energy I AIV A5, L.P., 2,781,526 shares by AF V Energy I AIV A6, L.P., 2,720,211 shares by AF V Energy I AIV A7, L.P., 2,756,084 shares by AF V Energy I AIV A8, L.P., 2,791,958 shares by AF V Energy I AIV A9, L.P., 2,791,958 shares by AF V Energy I AIV A10, L.P., 2,756,084 shares by AF V Energy I AIV A11, L.P., 2,720,889 shares by AF V Energy I AIV A12, L.P., 3,278,874 shares by AF V Energy I AIV A13, L.P., and 19,687,187 shares by AF V Energy I AIV B1, L.P.

F3 · ownership.nature: The manager of the entities (collectively, the "Purchasers") identified in footnotes (1), (6), (8), and (10) is ACOF Investment Management LLC ("ACOF"). The sole member of ACOF is Ares Management LLC, and the sole member of Ares Management LLC is Ares Management Holdings L.P. ("Ares Management Holdings") and the general partner of Ares Management Holdings is Ares Holdco LLC ("Ares Holdco"). The sole member of Ares Holdco is Ares Holdings Inc. ("Ares Holdings"), whose sole stockholder is Ares Management, L.P. ("Ares Management").

F4 · ownership.nature: The general partner of Ares Management is Ares Management GP LLC ("Ares Management GP") and the sole member of Ares Management GP is Ares Partners Holdco LLC ("Ares Partners," and together with the Purchasers, ACOF, Ares Management LLC, Ares Management Holdings, Ares Holdco, Ares Holdings, Ares Management, and Ares Management GP, the "Ares Entities"). Ares Partners is managed by a board of managers, which is composed of Michael Arougheti, R. Kipp deVeer, David Kaplan, Antony Ressler and Bennett Rosenthal. (continued in footnote 5)

F5 · ownership.nature: Decisions by Ares Partners' board of managers generally are made by a majority of the members, which majority, subject to certain conditions, must include Antony Ressler. Each of the Ares Entities (other than each Purchaser, with respect to the securities held directly by it) and the members of Ares Partners' board of managers and the other directors, officers, partners, stockholders, members and managers of the Ares Entities expressly disclaims beneficial ownership of the securities reported on this Form 4, 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. The address of each Ares Entity is 2000 Avenue of the Stars, 12th Floor, Los Angeles, CA 90067.

SEC source: 0001104659-17-034387 · a4.xml · nonDerivative · entry 2

ARES MANAGEMENT LLC · CIK 0001259313 · Director · 10% owner

AF V Energy I AIV B1, L.P. · CIK 0001705375 · Director · 10% owner

ACOF Investment Management LLC · CIK 0001684171 · Director · 10% owner

Ares Management Holdings L.P. · CIK 0001536937 · Director · 10% owner

Ares Holdco LLC · CIK 0001669983 · Director · 10% owner

Ares Holdings Inc. · CIK 0001620317 · Director · 10% owner

ARES MANAGEMENT LP · CIK 0001176948 · Director · 10% owner

Ares Management GP LLC · CIK 0001620264 · Director · 10% owner

Ares Partners Holdco LLC · CIK 0001620263 · Director · 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: 55,683,634

F6 · shares: The amount reported reflects an aggregate 409,404 shares of Common Stock acquired in the following individual amounts: 20,340 shares by AF V Energy I AIV A1, L.P., 20,157 shares by AF V Energy I AIV A2, L.P., 20,181 shares by AF V Energy I AIV A3, L.P., 20,288 shares by AF V Energy I AIV A4, L.P., 20,392 shares by AF V Energy I AIV A5, L.P., 20,264 shares by AF V Energy I AIV A6, L.P., 19,818 shares by AF V Energy I AIV A7, L.P., 20,079 shares by AF V Energy I AIV A8, L.P., 20,340 shares by AF V Energy I AIV A9, L.P., 20,340 shares by AF V Energy I AIV A10, L.P., 20,079 shares by AF V Energy I AIV A11, L.P., 19,818 shares by AF V Energy I AIV A12, L.P., 23,886 shares by AF V Energy I AIV A13, L.P., and 143,422 shares by AF V Energy I AIV B1, L.P.

F7 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $1.13 to $1.19, inclusive.

F3 · ownership.nature: The manager of the entities (collectively, the "Purchasers") identified in footnotes (1), (6), (8), and (10) is ACOF Investment Management LLC ("ACOF"). The sole member of ACOF is Ares Management LLC, and the sole member of Ares Management LLC is Ares Management Holdings L.P. ("Ares Management Holdings") and the general partner of Ares Management Holdings is Ares Holdco LLC ("Ares Holdco"). The sole member of Ares Holdco is Ares Holdings Inc. ("Ares Holdings"), whose sole stockholder is Ares Management, L.P. ("Ares Management").

F4 · ownership.nature: The general partner of Ares Management is Ares Management GP LLC ("Ares Management GP") and the sole member of Ares Management GP is Ares Partners Holdco LLC ("Ares Partners," and together with the Purchasers, ACOF, Ares Management LLC, Ares Management Holdings, Ares Holdco, Ares Holdings, Ares Management, and Ares Management GP, the "Ares Entities"). Ares Partners is managed by a board of managers, which is composed of Michael Arougheti, R. Kipp deVeer, David Kaplan, Antony Ressler and Bennett Rosenthal. (continued in footnote 5)

F5 · ownership.nature: Decisions by Ares Partners' board of managers generally are made by a majority of the members, which majority, subject to certain conditions, must include Antony Ressler. Each of the Ares Entities (other than each Purchaser, with respect to the securities held directly by it) and the members of Ares Partners' board of managers and the other directors, officers, partners, stockholders, members and managers of the Ares Entities expressly disclaims beneficial ownership of the securities reported on this Form 4, 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. The address of each Ares Entity is 2000 Avenue of the Stars, 12th Floor, Los Angeles, CA 90067.

SEC source: 0001104659-17-034387 · a4.xml · nonDerivative · entry 1

ARES MANAGEMENT LLC · CIK 0001259313 · Director · 10% owner

AF V Energy I AIV B1, L.P. · CIK 0001705375 · Director · 10% owner

ACOF Investment Management LLC · CIK 0001684171 · Director · 10% owner

Ares Management Holdings L.P. · CIK 0001536937 · Director · 10% owner

Ares Holdco LLC · CIK 0001669983 · Director · 10% owner

Ares Holdings Inc. · CIK 0001620317 · Director · 10% owner

ARES MANAGEMENT LP · CIK 0001176948 · Director · 10% owner

Ares Management GP LLC · CIK 0001620264 · Director · 10% owner

Ares Partners Holdco LLC · CIK 0001620263 · Director · 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: 55,274,230

F1 · shares: The amount reported reflects an aggregate 409,404 shares of the Issuer's common stock, par value $0.001 ("Common Stock") acquired in the following individual amounts: 20,340 shares by AF V Energy I AIV A1, L.P., 20,157 shares by AF V Energy I AIV A2, L.P., 20,181 shares by AF V Energy I AIV A3, L.P., 20,288 shares by AF V Energy I AIV A4, L.P., 20,392 shares by AF V Energy I AIV A5, L.P., 20,264 shares by AF V Energy I AIV A6, L.P., 19,818 shares by AF V Energy I AIV A7, L.P., 20,079 shares by AF V Energy I AIV A8, L.P., 20,340 shares by AF V Energy I AIV A9, L.P., 20,340 shares by AF V Energy I AIV A10, L.P., 20,079 shares by AF V Energy I AIV A11, L.P., 19,818 shares by AF V Energy I AIV A12, L.P., 23,886 shares by AF V Energy I AIV A13, L.P., and 143,422 shares by AF V Energy I AIV B1, L.P.

F2 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $1.07 to $1.14, inclusive. The undersigned undertakes to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the ranges set forth in footnotes (2), (7), and (9).

F3 · ownership.nature: The manager of the entities (collectively, the "Purchasers") identified in footnotes (1), (6), (8), and (10) is ACOF Investment Management LLC ("ACOF"). The sole member of ACOF is Ares Management LLC, and the sole member of Ares Management LLC is Ares Management Holdings L.P. ("Ares Management Holdings") and the general partner of Ares Management Holdings is Ares Holdco LLC ("Ares Holdco"). The sole member of Ares Holdco is Ares Holdings Inc. ("Ares Holdings"), whose sole stockholder is Ares Management, L.P. ("Ares Management").

F4 · ownership.nature: The general partner of Ares Management is Ares Management GP LLC ("Ares Management GP") and the sole member of Ares Management GP is Ares Partners Holdco LLC ("Ares Partners," and together with the Purchasers, ACOF, Ares Management LLC, Ares Management Holdings, Ares Holdco, Ares Holdings, Ares Management, and Ares Management GP, the "Ares Entities"). Ares Partners is managed by a board of managers, which is composed of Michael Arougheti, R. Kipp deVeer, David Kaplan, Antony Ressler and Bennett Rosenthal. (continued in footnote 5)

F5 · ownership.nature: Decisions by Ares Partners' board of managers generally are made by a majority of the members, which majority, subject to certain conditions, must include Antony Ressler. Each of the Ares Entities (other than each Purchaser, with respect to the securities held directly by it) and the members of Ares Partners' board of managers and the other directors, officers, partners, stockholders, members and managers of the Ares Entities expressly disclaims beneficial ownership of the securities reported on this Form 4, 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. The address of each Ares Entity is 2000 Avenue of the Stars, 12th Floor, Los Angeles, CA 90067.

SEC source: 0001104659-17-029663 · a4.xml · derivative · entry 3

ARES MANAGEMENT LLC · CIK 0001259313 · Director · 10% owner

AF V Energy I AIV B1, L.P. · CIK 0001705375 · Director · 10% owner

ACOF Investment Management LLC · CIK 0001684171 · Director · 10% owner

Ares Management Holdings L.P. · CIK 0001536937 · Director · 10% owner

Ares Holdco LLC · CIK 0001669983 · Director · 10% owner

Ares Holdings Inc. · CIK 0001620317 · Director · 10% owner

ARES MANAGEMENT LP · CIK 0001176948 · Director · 10% owner

Ares Management GP LLC · CIK 0001620264 · Director · 10% owner

Ares Partners Holdco LLC · CIK 0001620263 · Director · 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: Not disclosed

Underlying: Common Stock, $0.001 par value · 73,520,757 shares

Expires 2022-03-01

F7 · derivative.exercise_price: The initial conversion rate of 452.4355 per $1,000 principal amount of the Issuer's 6.00% Convertible Notes due 2022 (the "Convertible Notes") is equivalent to an initial conversion price of approximately $2.21 per share of the Common Stock.

F8 · ownership.nature: The amount reported reflects an aggregate 73,520,757 shares of Common Stock that may be issued upon the conversion of the Convertible Notes directly held in the following individual amounts: 3,652,511 shares by AF V Energy I AIV A1, L.P., 3,619,483 shares by AF V Energy I AIV A2, L.P., 3,624,460 shares by AF V Energy I AIV A3, L.P., 3,643,010 shares by AF V Energy I AIV A4, L.P., 3,662,012 shares by AF V Energy I AIV A5, L.P., 3,638,938 shares by AF V Energy I AIV A6, L.P., 3,558,857 shares by AF V Energy I AIV A7, L.P., 3,605,910 shares by AF V Energy I AIV A8, L.P., 3,652,511 shares by AF V Energy I AIV A9, L.P., 3,652,511 shares by AF V Energy I AIV A10, L.P., 3,605,910 shares by AF V Energy I AIV A11, L.P., 3,559,309 shares by AF V Energy I AIV A12, L.P., 4,289,540 shares by AF V Energy I AIV A13, L.P., and 25,755,795 shares by AF V Energy I AIV B1, L.P.

F3 · ownership.nature: The manager of the foregoing entities (collectively, the "Purchasers") identified in footnotes (1) and (2) is ACOF Investment Management LLC ("ACOF"). The sole member of ACOF is Ares Management LLC, and the sole member of Ares Management LLC is Ares Management Holdings L.P. ("Ares Management Holdings") and the general partner of Ares Management Holdings is Ares Holdco LLC ("Ares Holdco"). The sole member of Ares Holdco is Ares Holdings Inc. ("Ares Holdings"), whose sole stockholder is Ares Management, L.P. ("Ares Management").

F4 · ownership.nature: The general partner of Ares Management is Ares Management GP LLC ("Ares Management GP") and the sole member of Ares Management GP is Ares Partners Holdco LLC ("Ares Partners," and together with the Purchasers, ACOF, Ares Management LLC, Ares Management Holdings, Ares Holdco, Ares Holdings, Ares Management, and Ares Management GP, the "Ares Entities"). Ares Partners is managed by a board of managers, which is composed of Michael Arougheti, R. Kipp deVeer, David Kaplan, Antony Ressler and Bennett Rosenthal. (continued in footnote 5)

F5 · ownership.nature: Decisions by Ares Partners' board of managers generally are made by a majority of the members, which majority, subject to certain conditions, must include Antony Ressler. Each of the Ares Entities (other than each Purchaser, with respect to the securities held directly by it) and the members of Ares Partners' board of managers and the other directors, officers, partners, stockholders, members and managers of the Ares Entities expressly disclaims beneficial ownership of the securities reported on this Form 4, 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. The address of each Ares Entity is 2000 Avenue of the Stars, 12th Floor, Los Angeles, CA 90067.

SEC source: 0001104659-17-029663 · a4.xml · nonDerivative · entry 2

ARES MANAGEMENT LLC · CIK 0001259313 · Director · 10% owner

AF V Energy I AIV B1, L.P. · CIK 0001705375 · Director · 10% owner

ACOF Investment Management LLC · CIK 0001684171 · Director · 10% owner

Ares Management Holdings L.P. · CIK 0001536937 · Director · 10% owner

Ares Holdco LLC · CIK 0001669983 · Director · 10% owner

Ares Holdings Inc. · CIK 0001620317 · Director · 10% owner

ARES MANAGEMENT LP · CIK 0001176948 · Director · 10% owner

Ares Management GP LLC · CIK 0001620264 · Director · 10% owner

Ares Partners Holdco LLC · CIK 0001620263 · Director · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnote

Disclosed balance after: 52,910

F6 · ownership.nature: The amount reported reflects 52,910 shares held by Nathan Walton, which represents shares granted to Mr. Walton in his capacity as a director of the Issuer. Mr. Walton is associated with Ares Management LLC and certain of the other Ares Entities (as defined above). Pursuant to the policies of the Ares Entities, Mr. Walton holds these securities as a nominee on behalf of, and for the sole benefit of, the Ares Entities and has assigned to Ares Management LLC all economic, pecuniary and voting rights in respect of such securities.

SEC source: 0001104659-17-029663 · a4.xml · nonDerivative · entry 1

ARES MANAGEMENT LLC · CIK 0001259313 · Director · 10% owner

AF V Energy I AIV B1, L.P. · CIK 0001705375 · Director · 10% owner

ACOF Investment Management LLC · CIK 0001684171 · Director · 10% owner

Ares Management Holdings L.P. · CIK 0001536937 · Director · 10% owner

Ares Holdco LLC · CIK 0001669983 · Director · 10% owner

Ares Holdings Inc. · CIK 0001620317 · Director · 10% owner

ARES MANAGEMENT LP · CIK 0001176948 · Director · 10% owner

Ares Management GP LLC · CIK 0001620264 · Director · 10% owner

Ares Partners Holdco LLC · CIK 0001620263 · Director · 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: 54,864,826

F1 · shares: The amount reported reflects an aggregate 25,456,521 shares of the Issuer's common stock, par value $0.001 ("Common Stock") acquired in the following individual amounts: 1,264,680 shares by AF V Energy I AIV A1, L.P., 1,253,140 shares by AF V Energy I AIV A2, L.P., 1,255,176 shares by AF V Energy I AIV A3, L.P., 1,261,286 shares by AF V Energy I AIV A4, L.P., 1,268,074 shares by AF V Energy I AIV A5, L.P., 1,259,928 shares by AF V Energy I AIV A6, L.P., 1,232,096 shares by AF V Energy I AIV A7, L.P., 1,248,388 shares by AF V Energy I AIV A8, L.P., 1,264,680 shares by AF V Energy I AIV A9, L.P., 1,264,680 shares by AF V Energy I AIV A10, L.P., 1,248,388 shares by AF V Energy I AIV A11, L.P., 1,232,774 shares by AF V Energy I AIV A12, L.P., 1,485,303 shares by AF V Energy I AIV A13, L.P., and 8,917,928 shares by AF V Energy I AIV B1, L.P.

F2 · ownership.nature: The amount reported reflects an aggregate 54,864,826 shares of Common Stock directly held in the following individual amounts: 2,725,730 shares by AF V Energy I AIV A1, L.P., 2,701,078 shares by AF V Energy I AIV A2, L.P., 2,704,798 shares by AF V Energy I AIV A3, L.P., 2,718,589 shares by AF V Energy I AIV A4, L.P., 2,732,870 shares by AF V Energy I AIV A5, L.P., 2,715,545 shares by AF V Energy I AIV A6, L.P., 2,655,683 shares by AF V Energy I AIV A7, L.P., 2,690,706 shares by AF V Energy I AIV A8, L.P., 2,725,730 shares by AF V Energy I AIV A9, L.P., 2,725,730 shares by AF V Energy I AIV A10, L.P., 2,690,706 shares by AF V Energy I AIV A11, L.P., 2,656,361 shares by AF V Energy I AIV A12, L.P., 3,201,100 shares by AF V Energy I AIV A13, L.P., and 19,220,200 shares by AF V Energy I AIV B1, L.P.

F3 · ownership.nature: The manager of the foregoing entities (collectively, the "Purchasers") identified in footnotes (1) and (2) is ACOF Investment Management LLC ("ACOF"). The sole member of ACOF is Ares Management LLC, and the sole member of Ares Management LLC is Ares Management Holdings L.P. ("Ares Management Holdings") and the general partner of Ares Management Holdings is Ares Holdco LLC ("Ares Holdco"). The sole member of Ares Holdco is Ares Holdings Inc. ("Ares Holdings"), whose sole stockholder is Ares Management, L.P. ("Ares Management").

F4 · ownership.nature: The general partner of Ares Management is Ares Management GP LLC ("Ares Management GP") and the sole member of Ares Management GP is Ares Partners Holdco LLC ("Ares Partners," and together with the Purchasers, ACOF, Ares Management LLC, Ares Management Holdings, Ares Holdco, Ares Holdings, Ares Management, and Ares Management GP, the "Ares Entities"). Ares Partners is managed by a board of managers, which is composed of Michael Arougheti, R. Kipp deVeer, David Kaplan, Antony Ressler and Bennett Rosenthal. (continued in footnote 5)

F5 · ownership.nature: Decisions by Ares Partners' board of managers generally are made by a majority of the members, which majority, subject to certain conditions, must include Antony Ressler. Each of the Ares Entities (other than each Purchaser, with respect to the securities held directly by it) and the members of Ares Partners' board of managers and the other directors, officers, partners, stockholders, members and managers of the Ares Entities expressly disclaims beneficial ownership of the securities reported on this Form 4, 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. The address of each Ares Entity is 2000 Avenue of the Stars, 12th Floor, Los Angeles, CA 90067.