Cusumano Dino M

SEC source: 0001193125-25-284930 · ownership.xml · nonDerivative · entry 1

Cusumano Dino M · CIK 0001297865 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnote

Disclosed balance after: 5,750,001

F1 · ownership.nature: These shares are held directly by Vertex Aerospace Holdco LLC ("Vertex Holdco"). AIPCF VI LLC ("AIP GP") is the general partner of American Industrial Partners Capital Fund VI, L.P. ("AIP Fund VI"), the managing member of AIP Vertex GP LLC, which is the general partner of AIPCF VI Vertex Aerospace Funding LP ("Vertex Funding"). Vertex Holdco is a direct, wholly owned subsidiary of Vertex Funding.

F3 · ownership.nature: Any action by AIP GP with respect to these shares, including voting and dispositive decisions, requires a unanimous vote of the managing members of AIP GP. The Reporting Person is a senior managing member of AIP GP and also served as a member of the Board of Directors of the Issuer until his resignation on November 13, 2025. Accordingly, the Reporting Person may be deemed to share voting and dispositive power with respect to the shares held by Vertex Holdco and Lightship.

F4 · ownership.nature: (Continued from Footnote 3) The Reporting Person disclaims beneficial ownership of the shares of common stock held by Vertex Holdco and Lightship, except to the extent of his pecuniary interest therein, and the inclusion of these shares in this report shall not be deemed an admission of beneficial ownership of the reported shares for purposes of Section 16 or for any other purpose.

SEC source: 0001193125-25-203821 · ownership.xml · nonDerivative · entry 1

Cusumano Dino M · CIK 0001297865 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnote

Disclosed balance after: 8,000,001

F1 · ownership.nature: These shares are held directly by Vertex Aerospace Holdco LLC ("Vertex Holdco"). AIPCF VI LLC ("AIP GP") is the general partner of American Industrial Partners Capital Fund VI, L.P. ("AIP Fund VI"), the managing member of AIP Vertex GP LLC, which is the general partner of AIPCF VI Vertex Aerospace Funding LP ("Vertex Funding"). Vertex Holdco is a direct, wholly owned subsidiary of Vertex Funding.

F3 · ownership.nature: Any action by AIP GP with respect to these shares, including voting and dispositive decisions, requires a unanimous vote of the managing members of AIP GP. The Reporting Person is a senior managing member of AIP GP and also serves as a member of the Board of Directors of the Issuer. Accordingly, the Reporting Person may be deemed to share voting and dispositive power with respect to the shares held by Vertex Holdco and Lightship.

F4 · ownership.nature: (Continued from Footnote 3) The Reporting Person disclaims beneficial ownership of the shares of common stock held by Vertex Holdco and Lightship, except to the extent of his pecuniary interest therein, and the inclusion of these shares in this report shall not be deemed an admission of beneficial ownership of the reported shares for purposes of Section 16 or for any other purpose.

SEC source: 0000950170-25-108018 · ownership.xml · nonDerivative · entry 1

Cusumano Dino M · CIK 0001297865 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnote

Disclosed balance after: 9,700,001

F1 · ownership.nature: These shares are held directly by Vertex Aerospace Holdco LLC ("Vertex Holdco"). AIPCF VI LLC ("AIP GP") is the general partner of American Industrial Partners Capital Fund VI, L.P. ("AIP Fund VI"), the managing member of AIP Vertex GP LLC, which is the general partner of AIPCF VI Vertex Aerospace Funding LP ("Vertex Funding"). Vertex Holdco is a direct, wholly owned subsidiary of Vertex Funding.

F3 · ownership.nature: Any action by AIP GP with respect to these shares, including voting and dispositive decisions, requires a unanimous vote of the managing members of AIP GP. The Reporting Person is a senior managing member of AIP GP and also serves as a member of the Board of Directors of the Issuer. Accordingly, the Reporting Person may be deemed to share voting and dispositive power with respect to the shares held by Vertex Holdco and Lightship.

F4 · ownership.nature: (Continued from Footnote 3) The Reporting Person disclaims beneficial ownership of the shares of common stock held by Vertex Holdco and Lightship, except to the extent of his pecuniary interest therein, and the inclusion of these shares in this report shall not be deemed an admission of beneficial ownership of the reported shares for purposes of Section 16 or for any other purpose.

SEC source: 0000950170-25-075760 · ownership.xml · nonDerivative · entry 1

Cusumano Dino M · CIK 0001297865 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnote

Disclosed balance after: 11,700,001

F1 · ownership.nature: These shares are held directly by Vertex Aerospace Holdco LLC ("Vertex Holdco"). AIPCF VI LLC ("AIP GP") is the general partner of American Industrial Partners Capital Fund VI, L.P. ("AIP Fund VI"), the managing member of AIP Vertex GP LLC, which is the general partner of AIPCF VI Vertex Aerospace Funding LP ("Vertex Funding"). Vertex Holdco is a direct, wholly owned subsidiary of Vertex Funding.

F3 · ownership.nature: Any action by AIP GP with respect to these shares, including voting and dispositive decisions, requires a unanimous vote of the managing members of AIP GP. The Reporting Person is a senior managing member of AIP GP and also serves as a member of the Board of Directors of the Issuer. Accordingly, the Reporting Person may be deemed to share voting and dispositive power with respect to the shares held by Vertex Holdco and Lightship.

F4 · ownership.nature: (Continued from Footnote 3) The Reporting Person disclaims beneficial ownership of the shares of common stock held by Vertex Holdco and Lightship, except to the extent of his pecuniary interest therein, and the inclusion of these shares in this report shall not be deemed an admission of beneficial ownership of the reported shares for purposes of Section 16 or for any other purpose.

SEC source: 0000950170-24-127940 · ownership.xml · nonDerivative · entry 1

Cusumano Dino M · CIK 0001297865 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnote

Disclosed balance after: 13,700,001

F1 · ownership.nature: These shares are held directly by Vertex Aerospace Holdco LLC ("Vertex Holdco"). AIPCF VI LLC ("AIP GP") is the general partner of American Industrial Partners Capital Fund VI, L.P. ("AIP Fund VI"), the managing member of AIP Vertex GP LLC, which is the general partner of AIPCF VI Vertex Aerospace Funding LP ("Vertex Funding"). Vertex Holdco is a direct, wholly owned subsidiary of Vertex Funding.

F3 · ownership.nature: Any action by AIP GP with respect to these shares, including voting and dispositive decisions, requires a unanimous vote of the managing members of AIP GP. The Reporting Person is a senior managing member of AIP GP and also serves as a member of the Board of Directors of the Issuer. Accordingly, the Reporting Person may be deemed to share voting and dispositive power with respect to the shares held by Vertex Holdco and Lightship.

F4 · ownership.nature: (Continued from Footnote 3) The Reporting Person disclaims beneficial ownership of the shares of common stock held by Vertex Holdco and Lightship, except to the extent of his pecuniary interest therein, and the inclusion of these shares in this report shall not be deemed an admission of beneficial ownership of the reported shares for purposes of Section 16 or for any other purpose.

SEC source: 0000950170-24-106813 · ownership.xml · nonDerivative · entry 1

Cusumano Dino M · CIK 0001297865 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnote

Disclosed balance after: 16,200,001

F1 · ownership.nature: These shares are held directly by Vertex Aerospace Holdco LLC ("Vertex Holdco"). AIPCF VI LLC ("AIP GP") is the general partner of American Industrial Partners Capital Fund VI, L.P. ("AIP Fund VI"), the managing member of AIP Vertex GP LLC, which is the general partner of AIPCF VI Vertex Aerospace Funding LP ("Vertex Funding"). Vertex Holdco is a direct, wholly owned subsidiary of Vertex Funding.

F3 · ownership.nature: Any action by AIP GP with respect to these shares, including voting and dispositive decisions, requires a unanimous vote of the managing members of AIP GP. The Reporting Person is a senior managing member of AIP GP and also serves as a member of the Board of Directors of the Issuer. Accordingly, the Reporting Person may be deemed to share voting and dispositive power with respect to the shares held by Vertex Holdco and Lightship.

F4 · ownership.nature: (Continued from Footnote 3) The Reporting Person disclaims beneficial ownership of the shares of common stock held by Vertex Holdco and Lightship, except to the extent of his pecuniary interest therein, and the inclusion of these shares in this report shall not be deemed an admission of beneficial ownership of the reported shares for purposes of Section 16 or for any other purpose.

SEC source: 0000950170-24-105116 · ownership.xml · nonDerivative · entry 1

Cusumano Dino M · CIK 0001297865 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnote

Disclosed balance after: 16,500,001

F1 · ownership.nature: These shares are held directly by Vertex Aerospace Holdco LLC ("Vertex Holdco"). AIPCF VI LLC ("AIP GP") is the general partner of American Industrial Partners Capital Fund VI, L.P. ("AIP Fund VI"), the managing member of AIP Vertex GP LLC, which is the general partner of AIPCF VI Vertex Aerospace Funding LP ("Vertex Funding"). Vertex Holdco is a direct, wholly owned subsidiary of Vertex Funding.

F3 · ownership.nature: Any action by AIP GP with respect to these shares, including voting and dispositive decisions, requires a unanimous vote of the managing members of AIP GP. The Reporting Person is a senior managing member of AIP GP and also serves as a member of the Board of Directors of the Issuer. Accordingly, the Reporting Person may be deemed to share voting and dispositive power with respect to the shares held by Vertex Holdco and Lightship.

F4 · ownership.nature: (Continued from Footnote 3) The Reporting Person disclaims beneficial ownership of the shares of common stock held by Vertex Holdco and Lightship, except to the extent of his pecuniary interest therein, and the inclusion of these shares in this report shall not be deemed an admission of beneficial ownership of the reported shares for purposes of Section 16 or for any other purpose.

SEC source: 0001140361-22-033385 · form4.xml · nonDerivative · entry 8

Cusumano Dino M · CIK 0001297865 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnote

Disclosed balance after: 375,420

F12 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $41.92 to $42.75, inclusive.

F2 · ownership.nature: These shares are held directly by Lightship Capital LLC ("Lightship"). AIPCF VI LLC ("AIP GP") is the general partner of AIPCF VI Credit Opportunity Fund, LP, the sole and managing member of Lightship.

F4 · ownership.nature: Any action by AIP GP with respect to these shares, including voting and dispositive decisions, requires a unanimous vote of the managing members of AIP GP. The Reporting Person is a senior managing member of AIP GP and serves as a member of the Board of Directors of the Issuer. Accordingly, the Reporting Person and the other managing members of AIP GP may be deemed to share voting and dispositive power with respect to the shares held by Vertex Holdco and Lightship.

F5 · ownership.nature: (Continued from Footnote 4) The Reporting Person disclaims beneficial ownership of the shares of common stock held by the Reporting Persons, except to the extent of any pecuniary interest therein.

SEC source: 0001140361-22-033385 · form4.xml · nonDerivative · entry 7

Cusumano Dino M · CIK 0001297865 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnote

Disclosed balance after: 330,380

F11 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $40.80 to $41.50, inclusive.

F2 · ownership.nature: These shares are held directly by Lightship Capital LLC ("Lightship"). AIPCF VI LLC ("AIP GP") is the general partner of AIPCF VI Credit Opportunity Fund, LP, the sole and managing member of Lightship.

F4 · ownership.nature: Any action by AIP GP with respect to these shares, including voting and dispositive decisions, requires a unanimous vote of the managing members of AIP GP. The Reporting Person is a senior managing member of AIP GP and serves as a member of the Board of Directors of the Issuer. Accordingly, the Reporting Person and the other managing members of AIP GP may be deemed to share voting and dispositive power with respect to the shares held by Vertex Holdco and Lightship.

F5 · ownership.nature: (Continued from Footnote 4) The Reporting Person disclaims beneficial ownership of the shares of common stock held by the Reporting Persons, except to the extent of any pecuniary interest therein.

SEC source: 0001140361-22-033385 · form4.xml · nonDerivative · entry 6

Cusumano Dino M · CIK 0001297865 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnote

Disclosed balance after: 321,023

F10 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $41.07 to $41.25, inclusive.

F2 · ownership.nature: These shares are held directly by Lightship Capital LLC ("Lightship"). AIPCF VI LLC ("AIP GP") is the general partner of AIPCF VI Credit Opportunity Fund, LP, the sole and managing member of Lightship.

F4 · ownership.nature: Any action by AIP GP with respect to these shares, including voting and dispositive decisions, requires a unanimous vote of the managing members of AIP GP. The Reporting Person is a senior managing member of AIP GP and serves as a member of the Board of Directors of the Issuer. Accordingly, the Reporting Person and the other managing members of AIP GP may be deemed to share voting and dispositive power with respect to the shares held by Vertex Holdco and Lightship.

F5 · ownership.nature: (Continued from Footnote 4) The Reporting Person disclaims beneficial ownership of the shares of common stock held by the Reporting Persons, except to the extent of any pecuniary interest therein.

SEC source: 0001140361-22-033385 · form4.xml · nonDerivative · entry 5

Cusumano Dino M · CIK 0001297865 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnote

Disclosed balance after: 307,136

F9 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $40.00 to $40.99, inclusive.

F2 · ownership.nature: These shares are held directly by Lightship Capital LLC ("Lightship"). AIPCF VI LLC ("AIP GP") is the general partner of AIPCF VI Credit Opportunity Fund, LP, the sole and managing member of Lightship.

F4 · ownership.nature: Any action by AIP GP with respect to these shares, including voting and dispositive decisions, requires a unanimous vote of the managing members of AIP GP. The Reporting Person is a senior managing member of AIP GP and serves as a member of the Board of Directors of the Issuer. Accordingly, the Reporting Person and the other managing members of AIP GP may be deemed to share voting and dispositive power with respect to the shares held by Vertex Holdco and Lightship.

F5 · ownership.nature: (Continued from Footnote 4) The Reporting Person disclaims beneficial ownership of the shares of common stock held by the Reporting Persons, except to the extent of any pecuniary interest therein.

SEC source: 0001140361-22-033385 · form4.xml · nonDerivative · entry 4

Cusumano Dino M · CIK 0001297865 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnote

Disclosed balance after: 190,096

F8 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $39.00 to $39.99, inclusive.

F2 · ownership.nature: These shares are held directly by Lightship Capital LLC ("Lightship"). AIPCF VI LLC ("AIP GP") is the general partner of AIPCF VI Credit Opportunity Fund, LP, the sole and managing member of Lightship.

F4 · ownership.nature: Any action by AIP GP with respect to these shares, including voting and dispositive decisions, requires a unanimous vote of the managing members of AIP GP. The Reporting Person is a senior managing member of AIP GP and serves as a member of the Board of Directors of the Issuer. Accordingly, the Reporting Person and the other managing members of AIP GP may be deemed to share voting and dispositive power with respect to the shares held by Vertex Holdco and Lightship.

F5 · ownership.nature: (Continued from Footnote 4) The Reporting Person disclaims beneficial ownership of the shares of common stock held by the Reporting Persons, except to the extent of any pecuniary interest therein.

SEC source: 0001140361-22-033385 · form4.xml · nonDerivative · entry 3

Cusumano Dino M · CIK 0001297865 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnote

Disclosed balance after: 43,609

F7 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $37.73 to $38.00, inclusive.

F2 · ownership.nature: These shares are held directly by Lightship Capital LLC ("Lightship"). AIPCF VI LLC ("AIP GP") is the general partner of AIPCF VI Credit Opportunity Fund, LP, the sole and managing member of Lightship.

F4 · ownership.nature: Any action by AIP GP with respect to these shares, including voting and dispositive decisions, requires a unanimous vote of the managing members of AIP GP. The Reporting Person is a senior managing member of AIP GP and serves as a member of the Board of Directors of the Issuer. Accordingly, the Reporting Person and the other managing members of AIP GP may be deemed to share voting and dispositive power with respect to the shares held by Vertex Holdco and Lightship.

F5 · ownership.nature: (Continued from Footnote 4) The Reporting Person disclaims beneficial ownership of the shares of common stock held by the Reporting Persons, except to the extent of any pecuniary interest therein.

SEC source: 0001140361-22-033385 · form4.xml · nonDerivative · entry 2

Cusumano Dino M · CIK 0001297865 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnote

Disclosed balance after: 27,023

F6 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $37.30 to $38.00, inclusive.

F2 · ownership.nature: These shares are held directly by Lightship Capital LLC ("Lightship"). AIPCF VI LLC ("AIP GP") is the general partner of AIPCF VI Credit Opportunity Fund, LP, the sole and managing member of Lightship.

F4 · ownership.nature: Any action by AIP GP with respect to these shares, including voting and dispositive decisions, requires a unanimous vote of the managing members of AIP GP. The Reporting Person is a senior managing member of AIP GP and serves as a member of the Board of Directors of the Issuer. Accordingly, the Reporting Person and the other managing members of AIP GP may be deemed to share voting and dispositive power with respect to the shares held by Vertex Holdco and Lightship.

F5 · ownership.nature: (Continued from Footnote 4) The Reporting Person disclaims beneficial ownership of the shares of common stock held by the Reporting Persons, except to the extent of any pecuniary interest therein.

SEC source: 0001140361-22-033385 · form4.xml · nonDerivative · entry 1

Cusumano Dino M · CIK 0001297865 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnote

Disclosed balance after: 10,672

F1 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $36.26 to $37.185, inclusive. The Reporting Person 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 (1) and (6) through (12).

F2 · ownership.nature: These shares are held directly by Lightship Capital LLC ("Lightship"). AIPCF VI LLC ("AIP GP") is the general partner of AIPCF VI Credit Opportunity Fund, LP, the sole and managing member of Lightship.

F4 · ownership.nature: Any action by AIP GP with respect to these shares, including voting and dispositive decisions, requires a unanimous vote of the managing members of AIP GP. The Reporting Person is a senior managing member of AIP GP and serves as a member of the Board of Directors of the Issuer. Accordingly, the Reporting Person and the other managing members of AIP GP may be deemed to share voting and dispositive power with respect to the shares held by Vertex Holdco and Lightship.

F5 · ownership.nature: (Continued from Footnote 4) The Reporting Person disclaims beneficial ownership of the shares of common stock held by the Reporting Persons, except to the extent of any pecuniary interest therein.

SEC source: 0000950103-21-009190 · dp153026_4-cusumano.xml · nonDerivative · entry 1

Cusumano Dino M · CIK 0001297865 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 118,030

F1 · kind: Represents shares sold in connection with a registered offering and sale of the Company's common stock, par value $0.001 per share.

SEC source: 0000950103-21-008909 · dp152660_4-cusumano.xml · nonDerivative · entry 1

Cusumano Dino M · CIK 0001297865 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 121,500

F1 · kind: Represents shares sold in connection with a registered offering and sale of the Company's common stock, par value $0.001 per share.

SEC source: 0000950103-17-010334 · dp82002_4-cusumano.xml · nonDerivative · entry 4

Cusumano Dino M · CIK 0001297865 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnote

Disclosed balance after: 33,774,310

F2 · date: Represents a total of 10,812,653 shares that were disposed of pursuant to the registered offering contemplated by the prospectus included in the Issuer's registration statement on Form S-1 (File No. 333-220874). 9,402,307 shares were disposed of on October 17, 2017 at closing of the offering, and the remaining 1,410,346 shares were disposed of on October 27, 2017 pursuant to the exercise in full by the underwriters of their option to purchase additional shares as described in such registration statement. The Reporting Person disclaims beneficial ownership of the shares of common stock held by the AIP Funds except to the extent of any pecuniary interest therein.

F2 · shares: Represents a total of 10,812,653 shares that were disposed of pursuant to the registered offering contemplated by the prospectus included in the Issuer's registration statement on Form S-1 (File No. 333-220874). 9,402,307 shares were disposed of on October 17, 2017 at closing of the offering, and the remaining 1,410,346 shares were disposed of on October 27, 2017 pursuant to the exercise in full by the underwriters of their option to purchase additional shares as described in such registration statement. The Reporting Person disclaims beneficial ownership of the shares of common stock held by the AIP Funds except to the extent of any pecuniary interest therein.

F3 · balance_after: The 33,774,310 shares represent (i) 31,452,804 shares of common stock held by American Industrial Partners Capital Fund IV, LP. ("Fund IV"), (ii) 155,889 shares of common stock held by American Industrial Partners Capital Fund IV (Parallel), LP ("Parallel Fund") and (iii) 2,165,617 shares of common stock held by AIP/CHC Holdings, LLC ("AIP Holdings" and, together with Fund IV and Parallel Fund, the "AIP Funds"). AIP CF IV, LLC ("AIP GP") is the general partner of Fund IV and the Parallel Fund. The Reporting Person is one of the senior managing members of AIP GP. He is also one of the managing members of AIP/CHC Investors, LLC, which is the managing member of AIP Holdings. As a result of the above, the Reporting Person may be deemed to share voting and dispositive power with respect to the shares held by the AIP Funds. The AIP Funds may be deemed to be a "group" within the meaning of Rule 13d-5 of the Securities Exchange Act of 1934, as amended.

F2 · ownership.nature: Represents a total of 10,812,653 shares that were disposed of pursuant to the registered offering contemplated by the prospectus included in the Issuer's registration statement on Form S-1 (File No. 333-220874). 9,402,307 shares were disposed of on October 17, 2017 at closing of the offering, and the remaining 1,410,346 shares were disposed of on October 27, 2017 pursuant to the exercise in full by the underwriters of their option to purchase additional shares as described in such registration statement. The Reporting Person disclaims beneficial ownership of the shares of common stock held by the AIP Funds except to the extent of any pecuniary interest therein.

F3 · ownership.nature: The 33,774,310 shares represent (i) 31,452,804 shares of common stock held by American Industrial Partners Capital Fund IV, LP. ("Fund IV"), (ii) 155,889 shares of common stock held by American Industrial Partners Capital Fund IV (Parallel), LP ("Parallel Fund") and (iii) 2,165,617 shares of common stock held by AIP/CHC Holdings, LLC ("AIP Holdings" and, together with Fund IV and Parallel Fund, the "AIP Funds"). AIP CF IV, LLC ("AIP GP") is the general partner of Fund IV and the Parallel Fund. The Reporting Person is one of the senior managing members of AIP GP. He is also one of the managing members of AIP/CHC Investors, LLC, which is the managing member of AIP Holdings. As a result of the above, the Reporting Person may be deemed to share voting and dispositive power with respect to the shares held by the AIP Funds. The AIP Funds may be deemed to be a "group" within the meaning of Rule 13d-5 of the Securities Exchange Act of 1934, as amended.

SEC source: 0000950103-17-010334 · dp82002_4-cusumano.xml · nonDerivative · entry 3

Cusumano Dino M · CIK 0001297865 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 144,631

F1 · date: Represents a total of 46,303 shares that were disposed of pursuant to the registered offering contemplated by the prospectus included in the Issuer's registration statement on Form S-1 (File No. 333-220874). 40,263 shares were disposed of on October 17, 2017 at closing of the offering, and the remaining 6,040 shares were disposed of on October 27, 2017 pursuant to the exercise in full by the underwriters of their option to purchase additional shares as described in such registration statement.

F1 · shares: Represents a total of 46,303 shares that were disposed of pursuant to the registered offering contemplated by the prospectus included in the Issuer's registration statement on Form S-1 (File No. 333-220874). 40,263 shares were disposed of on October 17, 2017 at closing of the offering, and the remaining 6,040 shares were disposed of on October 27, 2017 pursuant to the exercise in full by the underwriters of their option to purchase additional shares as described in such registration statement.

SEC source: 0000950103-17-010334 · dp82002_4-cusumano.xml · nonDerivative · entry 2

Cusumano Dino M · CIK 0001297865 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnote

Disclosed balance after: 35,184,656

F2 · date: Represents a total of 10,812,653 shares that were disposed of pursuant to the registered offering contemplated by the prospectus included in the Issuer's registration statement on Form S-1 (File No. 333-220874). 9,402,307 shares were disposed of on October 17, 2017 at closing of the offering, and the remaining 1,410,346 shares were disposed of on October 27, 2017 pursuant to the exercise in full by the underwriters of their option to purchase additional shares as described in such registration statement. The Reporting Person disclaims beneficial ownership of the shares of common stock held by the AIP Funds except to the extent of any pecuniary interest therein.

F2 · shares: Represents a total of 10,812,653 shares that were disposed of pursuant to the registered offering contemplated by the prospectus included in the Issuer's registration statement on Form S-1 (File No. 333-220874). 9,402,307 shares were disposed of on October 17, 2017 at closing of the offering, and the remaining 1,410,346 shares were disposed of on October 27, 2017 pursuant to the exercise in full by the underwriters of their option to purchase additional shares as described in such registration statement. The Reporting Person disclaims beneficial ownership of the shares of common stock held by the AIP Funds except to the extent of any pecuniary interest therein.

F2 · ownership.nature: Represents a total of 10,812,653 shares that were disposed of pursuant to the registered offering contemplated by the prospectus included in the Issuer's registration statement on Form S-1 (File No. 333-220874). 9,402,307 shares were disposed of on October 17, 2017 at closing of the offering, and the remaining 1,410,346 shares were disposed of on October 27, 2017 pursuant to the exercise in full by the underwriters of their option to purchase additional shares as described in such registration statement. The Reporting Person disclaims beneficial ownership of the shares of common stock held by the AIP Funds except to the extent of any pecuniary interest therein.

F3 · ownership.nature: The 33,774,310 shares represent (i) 31,452,804 shares of common stock held by American Industrial Partners Capital Fund IV, LP. ("Fund IV"), (ii) 155,889 shares of common stock held by American Industrial Partners Capital Fund IV (Parallel), LP ("Parallel Fund") and (iii) 2,165,617 shares of common stock held by AIP/CHC Holdings, LLC ("AIP Holdings" and, together with Fund IV and Parallel Fund, the "AIP Funds"). AIP CF IV, LLC ("AIP GP") is the general partner of Fund IV and the Parallel Fund. The Reporting Person is one of the senior managing members of AIP GP. He is also one of the managing members of AIP/CHC Investors, LLC, which is the managing member of AIP Holdings. As a result of the above, the Reporting Person may be deemed to share voting and dispositive power with respect to the shares held by the AIP Funds. The AIP Funds may be deemed to be a "group" within the meaning of Rule 13d-5 of the Securities Exchange Act of 1934, as amended.

SEC source: 0000950103-17-010334 · dp82002_4-cusumano.xml · nonDerivative · entry 1

Cusumano Dino M · CIK 0001297865 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 150,671

F1 · date: Represents a total of 46,303 shares that were disposed of pursuant to the registered offering contemplated by the prospectus included in the Issuer's registration statement on Form S-1 (File No. 333-220874). 40,263 shares were disposed of on October 17, 2017 at closing of the offering, and the remaining 6,040 shares were disposed of on October 27, 2017 pursuant to the exercise in full by the underwriters of their option to purchase additional shares as described in such registration statement.

F1 · shares: Represents a total of 46,303 shares that were disposed of pursuant to the registered offering contemplated by the prospectus included in the Issuer's registration statement on Form S-1 (File No. 333-220874). 40,263 shares were disposed of on October 17, 2017 at closing of the offering, and the remaining 6,040 shares were disposed of on October 27, 2017 pursuant to the exercise in full by the underwriters of their option to purchase additional shares as described in such registration statement.

SEC source: 0000950103-17-001265 · dp72852_4-cusumano.xml · nonDerivative · entry 2

Cusumano Dino M · CIK 0001297865 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnote

Disclosed balance after: 44,586,963

F2 · shares: Represents all 1,247,878 shares subject to, and being disposed pursuant to, the exercise by the underwriters on February 6, 2017 of their over-allotment option, as described in the "Principal and Selling Stockholders" and "Underwriting (Conflicts of Interest)" sections of the prospectus included in the Issuer's registration statement on Form S-1 (File No. 333-214209). The Reporting Person disclaims beneficial ownership of the shares of common stock held by the AIP Funds except to the extent of any pecuniary interest therein.

F3 · balance_after: Represents (i) 41,522,240 shares of common stock held by American Industrial Partners Capital Fund IV, LP. ("Fund IV"), (ii) 205,796 shares of common stock held by American Industrial Partners Capital Fund IV (Parallel), LP ("Parallel Fund") and (iii) 2,858,927 shares of common stock held by AIP/CHC Holdings, LLC ("AIP Holdings" and, together with Fund IV and Parallel Fund, the "AIP Funds"). AIP CF IV, LLC ("AIP GP") is the general partner of Fund IV and the Parallel Fund. The Reporting Person is one of the senior managing members of AIP GP. He is also one of the managing members of AIP/CHC Investors, LLC, which is the managing member of AIP Holdings. As a result of the above, the Reporting Person may be deemed to share voting and dispositive power with respect to the shares held by the AIP Funds. The AIP Funds may be deemed to be a "group" with the meaning of Rule 13d-5 of the Securities Exchange Act of 1934, as amended.

F2 · ownership.nature: Represents all 1,247,878 shares subject to, and being disposed pursuant to, the exercise by the underwriters on February 6, 2017 of their over-allotment option, as described in the "Principal and Selling Stockholders" and "Underwriting (Conflicts of Interest)" sections of the prospectus included in the Issuer's registration statement on Form S-1 (File No. 333-214209). The Reporting Person disclaims beneficial ownership of the shares of common stock held by the AIP Funds except to the extent of any pecuniary interest therein.

F3 · ownership.nature: Represents (i) 41,522,240 shares of common stock held by American Industrial Partners Capital Fund IV, LP. ("Fund IV"), (ii) 205,796 shares of common stock held by American Industrial Partners Capital Fund IV (Parallel), LP ("Parallel Fund") and (iii) 2,858,927 shares of common stock held by AIP/CHC Holdings, LLC ("AIP Holdings" and, together with Fund IV and Parallel Fund, the "AIP Funds"). AIP CF IV, LLC ("AIP GP") is the general partner of Fund IV and the Parallel Fund. The Reporting Person is one of the senior managing members of AIP GP. He is also one of the managing members of AIP/CHC Investors, LLC, which is the managing member of AIP Holdings. As a result of the above, the Reporting Person may be deemed to share voting and dispositive power with respect to the shares held by the AIP Funds. The AIP Funds may be deemed to be a "group" with the meaning of Rule 13d-5 of the Securities Exchange Act of 1934, as amended.

SEC source: 0000950103-17-001265 · dp72852_4-cusumano.xml · nonDerivative · entry 1

Cusumano Dino M · CIK 0001297865 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 190,934

F1 · shares: Represents all 5,344 shares subject to, and being disposed pursuant to, the exercise by the underwriters on February 6, 2017 of their over-allotment option, as described in the "Principal and Selling Stockholders" and "Underwriting (Conflicts of Interest)" sections of the prospectus included in the Issuer's registration statement on Form S-1 (File No. 333-214209).