Warburg Pincus Partners, L.P.

SEC source: 0001104659-19-036208 · a4.xml · derivative · entry 1

Warburg Pincus Private Equity X, L.P. · CIK 0001414565 · Director · 10% owner

Warburg Pincus X Partners, L.P. · CIK 0001451560 · Director · 10% owner

Warburg Pincus X GP L.P. · CIK 0001414564 · Director · 10% owner

Warburg Pincus X, L.P. · CIK 0001414561 · Director · 10% owner

WPP GP LLC · CIK 0001621874 · Director · 10% owner

Warburg Pincus Partners, L.P. · CIK 0001621242 · Director · 10% owner

Warburg Pincus Partners GP LLC · CIK 0001621224 · Director · 10% owner

WARBURG PINCUS & CO. · CIK 0000929408 · Director · 10% owner

WARBURG PINCUS LLC · CIK 0001162870 · Director · 10% owner

KAYE CHARLES R · CIK 0001239318 · Director · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 54,938,776

Underlying: Class A Common Stock · 53,235,674 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: This Form 4 is filed on behalf of the Warburg Pincus Entities (as defined below). Warburg Pincus Private Equity X, L.P., a Delaware limited partnership ("WPPE X"), is a holder of record of 53,235,674 shares of Class B common stock, through the conversion of 48,450,000 shares of Series A-1 Convertible Preferred Stock (the "Series A-1 Preferred") of CrowdStrike Holdings, Inc. (the "Issuer"), 2,758,718 shares of Series B Convertible Preferred Stock (the "Series B Preferred") of the Issuer, 951,756 shares of Series C Convertible Preferred Stock (the "Series C Preferred") of the Issuer and 1,075,200 shares of Series D Convertible Preferred Stock (the "Series D Preferred") of the Issuer.

F2 · derivative.exercise_price: Warburg Pincus X Partners, L.P., a Delaware limited partnership ("WPXP" and together with WPPE X, the "WPP Funds"), is a holder of record of 1,703,102 shares of Class B common stock, through the conversion of 1,550,000 shares of Series A-1 Preferred of the Issuer, 88,256 of Series B Preferred of the Issuer, 30,448 of Series C Preferred of the Issuer and 34,398 of Series D Preferred of the Issuer. The Series A-1 Preferred, Series B Preferred, Series C Preferred and Series D Preferred converted into Class B common stock, without the payment of additional consideration by the holder, immediately prior to the completion of the Issuer's initial public offering on a one for one basis. This stock has no expiration date.

F7 · derivative.exercise_price: Each share of Class B common stock is convertible at any time at the option of the Reporting Persons into one share of Class A common stock and has no expiration date. All shares of Class B common stock will automatically convert into shares of Class A common stock upon the occurrence of certain specified events.

F1 · price: This Form 4 is filed on behalf of the Warburg Pincus Entities (as defined below). Warburg Pincus Private Equity X, L.P., a Delaware limited partnership ("WPPE X"), is a holder of record of 53,235,674 shares of Class B common stock, through the conversion of 48,450,000 shares of Series A-1 Convertible Preferred Stock (the "Series A-1 Preferred") of CrowdStrike Holdings, Inc. (the "Issuer"), 2,758,718 shares of Series B Convertible Preferred Stock (the "Series B Preferred") of the Issuer, 951,756 shares of Series C Convertible Preferred Stock (the "Series C Preferred") of the Issuer and 1,075,200 shares of Series D Convertible Preferred Stock (the "Series D Preferred") of the Issuer.

F2 · price: Warburg Pincus X Partners, L.P., a Delaware limited partnership ("WPXP" and together with WPPE X, the "WPP Funds"), is a holder of record of 1,703,102 shares of Class B common stock, through the conversion of 1,550,000 shares of Series A-1 Preferred of the Issuer, 88,256 of Series B Preferred of the Issuer, 30,448 of Series C Preferred of the Issuer and 34,398 of Series D Preferred of the Issuer. The Series A-1 Preferred, Series B Preferred, Series C Preferred and Series D Preferred converted into Class B common stock, without the payment of additional consideration by the holder, immediately prior to the completion of the Issuer's initial public offering on a one for one basis. This stock has no expiration date.

F7 · price: Each share of Class B common stock is convertible at any time at the option of the Reporting Persons into one share of Class A common stock and has no expiration date. All shares of Class B common stock will automatically convert into shares of Class A common stock upon the occurrence of certain specified events.

F1 · derivative.exercise_date: This Form 4 is filed on behalf of the Warburg Pincus Entities (as defined below). Warburg Pincus Private Equity X, L.P., a Delaware limited partnership ("WPPE X"), is a holder of record of 53,235,674 shares of Class B common stock, through the conversion of 48,450,000 shares of Series A-1 Convertible Preferred Stock (the "Series A-1 Preferred") of CrowdStrike Holdings, Inc. (the "Issuer"), 2,758,718 shares of Series B Convertible Preferred Stock (the "Series B Preferred") of the Issuer, 951,756 shares of Series C Convertible Preferred Stock (the "Series C Preferred") of the Issuer and 1,075,200 shares of Series D Convertible Preferred Stock (the "Series D Preferred") of the Issuer.

F2 · derivative.exercise_date: Warburg Pincus X Partners, L.P., a Delaware limited partnership ("WPXP" and together with WPPE X, the "WPP Funds"), is a holder of record of 1,703,102 shares of Class B common stock, through the conversion of 1,550,000 shares of Series A-1 Preferred of the Issuer, 88,256 of Series B Preferred of the Issuer, 30,448 of Series C Preferred of the Issuer and 34,398 of Series D Preferred of the Issuer. The Series A-1 Preferred, Series B Preferred, Series C Preferred and Series D Preferred converted into Class B common stock, without the payment of additional consideration by the holder, immediately prior to the completion of the Issuer's initial public offering on a one for one basis. This stock has no expiration date.

F7 · derivative.exercise_date: Each share of Class B common stock is convertible at any time at the option of the Reporting Persons into one share of Class A common stock and has no expiration date. All shares of Class B common stock will automatically convert into shares of Class A common stock upon the occurrence of certain specified events.

F1 · derivative.expiration_date: This Form 4 is filed on behalf of the Warburg Pincus Entities (as defined below). Warburg Pincus Private Equity X, L.P., a Delaware limited partnership ("WPPE X"), is a holder of record of 53,235,674 shares of Class B common stock, through the conversion of 48,450,000 shares of Series A-1 Convertible Preferred Stock (the "Series A-1 Preferred") of CrowdStrike Holdings, Inc. (the "Issuer"), 2,758,718 shares of Series B Convertible Preferred Stock (the "Series B Preferred") of the Issuer, 951,756 shares of Series C Convertible Preferred Stock (the "Series C Preferred") of the Issuer and 1,075,200 shares of Series D Convertible Preferred Stock (the "Series D Preferred") of the Issuer.

F2 · derivative.expiration_date: Warburg Pincus X Partners, L.P., a Delaware limited partnership ("WPXP" and together with WPPE X, the "WPP Funds"), is a holder of record of 1,703,102 shares of Class B common stock, through the conversion of 1,550,000 shares of Series A-1 Preferred of the Issuer, 88,256 of Series B Preferred of the Issuer, 30,448 of Series C Preferred of the Issuer and 34,398 of Series D Preferred of the Issuer. The Series A-1 Preferred, Series B Preferred, Series C Preferred and Series D Preferred converted into Class B common stock, without the payment of additional consideration by the holder, immediately prior to the completion of the Issuer's initial public offering on a one for one basis. This stock has no expiration date.

F7 · derivative.expiration_date: Each share of Class B common stock is convertible at any time at the option of the Reporting Persons into one share of Class A common stock and has no expiration date. All shares of Class B common stock will automatically convert into shares of Class A common stock upon the occurrence of certain specified events.

SEC source: 0001104659-19-035111 · a4.xml · nonDerivative · entry 2

Warburg Pincus Private Equity X O&G, L.P. · CIK 0001528258 · Director · 10% owner

Warburg Pincus X Partners, L.P. · CIK 0001451560 · Director · 10% owner

Warburg Pincus X, L.P. · CIK 0001414561 · Director · 10% owner

Warburg Pincus X GP L.P. · CIK 0001414564 · Director · 10% owner

WPP GP LLC · CIK 0001621874 · Director · 10% owner

Warburg Pincus Partners, L.P. · CIK 0001621242 · Director · 10% owner

Warburg Pincus Partners GP LLC · CIK 0001621224 · Director · 10% owner

WARBURG PINCUS & CO. · CIK 0000929408 · 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: 0

F1 · balance_after: Effective June 10, 2019, WP X O&G (as defined below) sold 15,594,360 shares of common stock, par value $0.01 per share ("Common Stock"), of Antero Resources Corporation (the "Issuer") and WP X Partners sold 499,803 shares of Common Stock of the Issuer (collectively, the "Sale").

F2 · balance_after: This Form 4 is filed on behalf of (i) Warburg Pincus X Partners, L.P., a Delaware limited partnership ("WP X Partners"); and (ii) Warburg Pincus Private Equity X O&G, L.P., a Delaware limited partnership ("WP X O&G").

F3 · balance_after: Warburg Pincus X, L.P., a Delaware limited partnership ("WP X GP"), is the general partner of WP X Partners and WP X O&G. Warburg Pincus X GP L.P., a Delaware limited partnership ("WP X GP LP"), is the general partner of WP X GP. WPP GP LLC, a Delaware limited liability company ("WPP GP"), is the general partner of WP X GP LP. Warburg Pincus Partners, L.P., a Delaware limited partnership ("WP Partners"), is the managing member of WPP GP. Warburg Pincus Partners GP LLC, a Delaware limited liability company ("WP Partners GP"), is the general partner of WP Partners.

F4 · balance_after: Warburg Pincus & Co., a New York general partnership ("WP"), is the managing member of WP Partners GP.

F5 · ownership.nature: Common Stock of the Issuer was held directly by WP X Partners.

SEC source: 0001104659-19-035111 · a4.xml · nonDerivative · entry 1

Warburg Pincus Private Equity X O&G, L.P. · CIK 0001528258 · Director · 10% owner

Warburg Pincus X Partners, L.P. · CIK 0001451560 · Director · 10% owner

Warburg Pincus X, L.P. · CIK 0001414561 · Director · 10% owner

Warburg Pincus X GP L.P. · CIK 0001414564 · Director · 10% owner

WPP GP LLC · CIK 0001621874 · Director · 10% owner

Warburg Pincus Partners, L.P. · CIK 0001621242 · Director · 10% owner

Warburg Pincus Partners GP LLC · CIK 0001621224 · Director · 10% owner

WARBURG PINCUS & CO. · CIK 0000929408 · Director · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

F1 · balance_after: Effective June 10, 2019, WP X O&G (as defined below) sold 15,594,360 shares of common stock, par value $0.01 per share ("Common Stock"), of Antero Resources Corporation (the "Issuer") and WP X Partners sold 499,803 shares of Common Stock of the Issuer (collectively, the "Sale").

F2 · balance_after: This Form 4 is filed on behalf of (i) Warburg Pincus X Partners, L.P., a Delaware limited partnership ("WP X Partners"); and (ii) Warburg Pincus Private Equity X O&G, L.P., a Delaware limited partnership ("WP X O&G").

F3 · balance_after: Warburg Pincus X, L.P., a Delaware limited partnership ("WP X GP"), is the general partner of WP X Partners and WP X O&G. Warburg Pincus X GP L.P., a Delaware limited partnership ("WP X GP LP"), is the general partner of WP X GP. WPP GP LLC, a Delaware limited liability company ("WPP GP"), is the general partner of WP X GP LP. Warburg Pincus Partners, L.P., a Delaware limited partnership ("WP Partners"), is the managing member of WPP GP. Warburg Pincus Partners GP LLC, a Delaware limited liability company ("WP Partners GP"), is the general partner of WP Partners.

F4 · balance_after: Warburg Pincus & Co., a New York general partnership ("WP"), is the managing member of WP Partners GP.

SEC source: 0001104659-19-031562 · a4.xml · nonDerivative · entry 4

Warburg Pincus Private Equity X O&G, L.P. · CIK 0001528258 · Director · 10% owner

Warburg Pincus X, L.P. · CIK 0001414561 · Director · 10% owner

Warburg Pincus X GP L.P. · CIK 0001414564 · Director · 10% owner

WPP GP LLC · CIK 0001621874 · Director · 10% owner

Warburg Pincus Partners, L.P. · CIK 0001621242 · Director · 10% owner

Warburg Pincus Partners GP LLC · CIK 0001621224 · Director · 10% owner

WARBURG PINCUS & CO. · CIK 0000929408 · Director · 10% owner

WARBURG PINCUS LLC · CIK 0001162870 · Director · 10% owner

KAYE CHARLES R · CIK 0001239318 · Director · 10% owner

Landy Joseph P. · CIK 0001220638 · 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: 40,109,589

F1 · ownership.nature: The Warburg Pincus funds are Warburg Pincus Private Equity X O&G, L.P., a Delaware limited partnership ("WP X O&G" and, together with its affiliated partnership, Warburg Pincus X Partners, L.P., a Delaware limited partnership ("WP X Partners"), the "WP X O&G Funds"), and Warburg Pincus Private Equity VIII, L.P., a Delaware limited partnership ("WP VIII"), and its two affiliated partnerships, Warburg Pincus Netherlands Private Equity VIII C.V. I, a limited partnership formed under the laws of the Netherlands ("WP VIII CV I"), and WP-WPVIII Investors, L.P., a Delaware limited partnership ("WP-WPVIII Investors"), and together with WP VIII and WP VIII CV I, the "WP VIII Funds").

F2 · ownership.nature: Warburg Pincus X, L.P., a Delaware limited partnership ("WP X GP"), is the general partner of each of the WP X O&G Funds. Warburg Pincus X GP L.P., a Delaware limited partnership ("WP X GP LP"), is the general partner of WP X GP. WPP GP LLC, a Delaware limited liability company ("WPP GP"), is the general partner of (a) WP X GP, and (b) WP-WPVIII Investors GP L.P., a Delaware limited partnership ("WP-WPVIII GP"), which, in turn, is the general partner of WP-WPVIII Investors. Warburg Pincus Partners, L.P., a Delaware limited partnership ("WP Partners"), is (i) the managing member of WPP GP, and (ii) the general partner of WP VIII and WP VIII CV I. Warburg Pincus Partners GP LLC, a Delaware limited liability company ("WP Partners GP"), is the general partner of WP Partners.

F3 · ownership.nature: Warburg Pincus & Co., a New York general partnership ("WP"), is the managing member of WP Partners GP. Warburg Pincus LLC, a New York limited liability company ("WP LLC"), is the manager of each of the WP X O&G Funds and the WP VIII Funds.

F4 · ownership.nature: Each of the WP X O&G Funds, the WP VIII Funds, WP-WPVIII GP, WP X GP, WP X GP LP, WPP GP, WP Partners, WP Partners GP, WP and WP LLC are collectively referred to herein as the "Warburg Pincus Entities." Charles R. Kaye and Joseph P. Landy are each Managing General Partners of WP and Managing Members and Co-Chief Executive Officers of WP LLC and may be deemed to control the Warburg Pincus Entities.

F5 · ownership.nature: By reason of the provisions of Rule 16a-1 of the Securities Exchange Act of 1934, as amended (the "Exchange Act"), (a) WP X GP, WP X GP LP, WPP GP, WP Partners, WP Partners GP, WP, WP LLC, and Messrs. Kaye and Landy and certain affiliates may be deemed to be beneficial owners of the 35,948,706 shares of common stock of Antero Midstream Corp (the "Common Shares") held collectively by the WP X O&G Funds, and (b) WPP GP, WP Partners, WP Partners GP, WP, WP LLC, and Messrs. Kaye and Landy and certain affiliates may be deemed to be beneficial owners of the 4,212,177 Common Shares held collectively by the WP VIII Funds.

F6 · ownership.nature: (Continued from Footnote 5) The Warburg Pincus Entities, Messrs. Kaye and Landy and such affiliates disclaim beneficial ownership of such AMGP Common Shares and such New AM Common Shares except to the extent of their pecuniary interest therein. Each of WP X O&G, WP X GP, WP X GP LP, WPP GP, WP Partners, WP Partners GP, WP and WP LLC is a director-by-deputization solely for purposes of Section 16 of the Exchange Act.

F7 · ownership.nature: WP X GP and WP X GP LP each indirectly holds, and therefore may be deemed to be the beneficial owner of the 35,948,706 Common Shares directly held by the WP X O&G Funds.

F8 · ownership.nature: WPP GP indirectly holds, and therefore may be deemed to be the beneficial owner of the 35,960,394 Common Shares directly held by WP-WPVIII Investors and the WP X O&G Funds.

F9 · ownership.nature: WP Partners, WP Partners GP, WP and WP LLC each indirectly holds, and therefore may be deemed to be the beneficial owner of the 40,109,589 Common Shares directly held by the WP VIII Funds and the WP X O&G Funds.

SEC source: 0001104659-19-031562 · a4.xml · nonDerivative · entry 3

Warburg Pincus Private Equity X O&G, L.P. · CIK 0001528258 · Director · 10% owner

Warburg Pincus X, L.P. · CIK 0001414561 · Director · 10% owner

Warburg Pincus X GP L.P. · CIK 0001414564 · Director · 10% owner

WPP GP LLC · CIK 0001621874 · Director · 10% owner

Warburg Pincus Partners, L.P. · CIK 0001621242 · Director · 10% owner

Warburg Pincus Partners GP LLC · CIK 0001621224 · Director · 10% owner

WARBURG PINCUS & CO. · CIK 0000929408 · Director · 10% owner

WARBURG PINCUS LLC · CIK 0001162870 · Director · 10% owner

KAYE CHARLES R · CIK 0001239318 · Director · 10% owner

Landy Joseph P. · CIK 0001220638 · 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: 35,960,394

F1 · ownership.nature: The Warburg Pincus funds are Warburg Pincus Private Equity X O&G, L.P., a Delaware limited partnership ("WP X O&G" and, together with its affiliated partnership, Warburg Pincus X Partners, L.P., a Delaware limited partnership ("WP X Partners"), the "WP X O&G Funds"), and Warburg Pincus Private Equity VIII, L.P., a Delaware limited partnership ("WP VIII"), and its two affiliated partnerships, Warburg Pincus Netherlands Private Equity VIII C.V. I, a limited partnership formed under the laws of the Netherlands ("WP VIII CV I"), and WP-WPVIII Investors, L.P., a Delaware limited partnership ("WP-WPVIII Investors"), and together with WP VIII and WP VIII CV I, the "WP VIII Funds").

F2 · ownership.nature: Warburg Pincus X, L.P., a Delaware limited partnership ("WP X GP"), is the general partner of each of the WP X O&G Funds. Warburg Pincus X GP L.P., a Delaware limited partnership ("WP X GP LP"), is the general partner of WP X GP. WPP GP LLC, a Delaware limited liability company ("WPP GP"), is the general partner of (a) WP X GP, and (b) WP-WPVIII Investors GP L.P., a Delaware limited partnership ("WP-WPVIII GP"), which, in turn, is the general partner of WP-WPVIII Investors. Warburg Pincus Partners, L.P., a Delaware limited partnership ("WP Partners"), is (i) the managing member of WPP GP, and (ii) the general partner of WP VIII and WP VIII CV I. Warburg Pincus Partners GP LLC, a Delaware limited liability company ("WP Partners GP"), is the general partner of WP Partners.

F3 · ownership.nature: Warburg Pincus & Co., a New York general partnership ("WP"), is the managing member of WP Partners GP. Warburg Pincus LLC, a New York limited liability company ("WP LLC"), is the manager of each of the WP X O&G Funds and the WP VIII Funds.

F4 · ownership.nature: Each of the WP X O&G Funds, the WP VIII Funds, WP-WPVIII GP, WP X GP, WP X GP LP, WPP GP, WP Partners, WP Partners GP, WP and WP LLC are collectively referred to herein as the "Warburg Pincus Entities." Charles R. Kaye and Joseph P. Landy are each Managing General Partners of WP and Managing Members and Co-Chief Executive Officers of WP LLC and may be deemed to control the Warburg Pincus Entities.

F5 · ownership.nature: By reason of the provisions of Rule 16a-1 of the Securities Exchange Act of 1934, as amended (the "Exchange Act"), (a) WP X GP, WP X GP LP, WPP GP, WP Partners, WP Partners GP, WP, WP LLC, and Messrs. Kaye and Landy and certain affiliates may be deemed to be beneficial owners of the 35,948,706 shares of common stock of Antero Midstream Corp (the "Common Shares") held collectively by the WP X O&G Funds, and (b) WPP GP, WP Partners, WP Partners GP, WP, WP LLC, and Messrs. Kaye and Landy and certain affiliates may be deemed to be beneficial owners of the 4,212,177 Common Shares held collectively by the WP VIII Funds.

F6 · ownership.nature: (Continued from Footnote 5) The Warburg Pincus Entities, Messrs. Kaye and Landy and such affiliates disclaim beneficial ownership of such AMGP Common Shares and such New AM Common Shares except to the extent of their pecuniary interest therein. Each of WP X O&G, WP X GP, WP X GP LP, WPP GP, WP Partners, WP Partners GP, WP and WP LLC is a director-by-deputization solely for purposes of Section 16 of the Exchange Act.

F7 · ownership.nature: WP X GP and WP X GP LP each indirectly holds, and therefore may be deemed to be the beneficial owner of the 35,948,706 Common Shares directly held by the WP X O&G Funds.

F8 · ownership.nature: WPP GP indirectly holds, and therefore may be deemed to be the beneficial owner of the 35,960,394 Common Shares directly held by WP-WPVIII Investors and the WP X O&G Funds.

SEC source: 0001628280-19-004178 · wf-form4_155494791134305.xml · derivative · entry 13

WP X Finance, L.P. · CIK 0001770767 · 10% owner

WPX GP, L.P. · CIK 0001770772 · 10% owner

Warburg Pincus Private Equity X, L.P. · CIK 0001414565 · 10% owner

Warburg Pincus X Partners, L.P. · CIK 0001451560 · 10% owner

Warburg Pincus X, L.P. · CIK 0001414561 · 10% owner

Warburg Pincus X GP L.P. · CIK 0001414564 · 10% owner

WPP GP LLC · CIK 0001621874 · 10% owner

Warburg Pincus Partners, L.P. · CIK 0001621242 · 10% owner

Warburg Pincus Partners GP LLC · CIK 0001621224 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 1,538,056 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: The Series B Preferred Stock and Series C Preferred Stock automatically converted into Common Stock on a 1:1 basis immediately prior to the completion of the Issuer's initial public offering of Common Stock and had no expiration date.

F9 · kind: WP X Finance exercised a warrant to purchase 1,071,902 shares of the Issuer's Series C Preferred Stock at a per share exercise price of $6.11. WP X Finance paid the exercise price on a cashless basis, resulting in the Issuer withholding 327,467 of the warrant shares to pay the exercise price and issued to WP X Finance the remaining 744,435 shares.

F12 · kind: WP X Finance exercised a warrant to purchase 1,074,072 shares of the Issuer's Series C Preferred Stock at a per share exercise price of $6.11. WP X Finance paid the exercise price on a cashless basis, resulting in the Issuer withholding 328,129 of the warrant shares to pay the exercise price and issued to WP X Finance the remaining 745,943 shares.

F13 · kind: WPXP exercised a warrant to purchase 34,291 shares of the Issuer's Series C Preferred Stock at a per share exercise price of $6.11. WPXP paid the exercise price on a cashless basis, resulting in the Issuer withholding 10,476 of the warrant shares to pay the exercise price and issued to WPXP the remaining 23,815 shares.

F15 · kind: WPXP exercised a warrant to purchase 34,361 shares of the Issuer's Series C Preferred Stock at a per share exercise price of $6.11. WPXP paid the exercise price on a cashless basis, resulting in the Issuer withholding 10,498 of the warrant shares to pay the exercise price and issued to WPXP the remaining 23,863 shares.

F20 · shares: Prior to conversion to Common Stock, these shares are comprised of 1,490,378 shares held by WPX Finance and 47,678 shares held by WPXP.

F1 · derivative.exercise_date: The Series B Preferred Stock and Series C Preferred Stock automatically converted into Common Stock on a 1:1 basis immediately prior to the completion of the Issuer's initial public offering of Common Stock and had no expiration date.

F1 · derivative.expiration_date: The Series B Preferred Stock and Series C Preferred Stock automatically converted into Common Stock on a 1:1 basis immediately prior to the completion of the Issuer's initial public offering of Common Stock and had no expiration date.

F20 · ownership.direct: Prior to conversion to Common Stock, these shares are comprised of 1,490,378 shares held by WPX Finance and 47,678 shares held by WPXP.

SEC source: 0001628280-19-004178 · wf-form4_155494791134305.xml · derivative · entry 12

WP X Finance, L.P. · CIK 0001770767 · 10% owner

WPX GP, L.P. · CIK 0001770772 · 10% owner

Warburg Pincus Private Equity X, L.P. · CIK 0001414565 · 10% owner

Warburg Pincus X Partners, L.P. · CIK 0001451560 · 10% owner

Warburg Pincus X, L.P. · CIK 0001414561 · 10% owner

Warburg Pincus X GP L.P. · CIK 0001414564 · 10% owner

WPP GP LLC · CIK 0001621874 · 10% owner

Warburg Pincus Partners, L.P. · CIK 0001621242 · 10% owner

Warburg Pincus Partners GP LLC · CIK 0001621224 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 47,678

Underlying: Common Stock · 20,974 shares

Expires not disclosed

F1 · derivative.exercise_price: The Series B Preferred Stock and Series C Preferred Stock automatically converted into Common Stock on a 1:1 basis immediately prior to the completion of the Issuer's initial public offering of Common Stock and had no expiration date.

F13 · kind: WPXP exercised a warrant to purchase 34,291 shares of the Issuer's Series C Preferred Stock at a per share exercise price of $6.11. WPXP paid the exercise price on a cashless basis, resulting in the Issuer withholding 10,476 of the warrant shares to pay the exercise price and issued to WPXP the remaining 23,815 shares.

F15 · kind: WPXP exercised a warrant to purchase 34,361 shares of the Issuer's Series C Preferred Stock at a per share exercise price of $6.11. WPXP paid the exercise price on a cashless basis, resulting in the Issuer withholding 10,498 of the warrant shares to pay the exercise price and issued to WPXP the remaining 23,863 shares.

F19 · shares: These shares are comprised of 10,476 shares and 10,498 shares withheld by the Issuer pursuant to the net exercise of warrants, as detailed in footnotes (13) and (15).

F1 · derivative.exercise_date: The Series B Preferred Stock and Series C Preferred Stock automatically converted into Common Stock on a 1:1 basis immediately prior to the completion of the Issuer's initial public offering of Common Stock and had no expiration date.

F1 · derivative.expiration_date: The Series B Preferred Stock and Series C Preferred Stock automatically converted into Common Stock on a 1:1 basis immediately prior to the completion of the Issuer's initial public offering of Common Stock and had no expiration date.

F17 · ownership.direct: These shares are held by WPXP.

SEC source: 0001628280-19-004178 · wf-form4_155494791134305.xml · derivative · entry 11

WP X Finance, L.P. · CIK 0001770767 · 10% owner

WPX GP, L.P. · CIK 0001770772 · 10% owner

Warburg Pincus Private Equity X, L.P. · CIK 0001414565 · 10% owner

Warburg Pincus X Partners, L.P. · CIK 0001451560 · 10% owner

Warburg Pincus X, L.P. · CIK 0001414561 · 10% owner

Warburg Pincus X GP L.P. · CIK 0001414564 · 10% owner

WPP GP LLC · CIK 0001621874 · 10% owner

Warburg Pincus Partners, L.P. · CIK 0001621242 · 10% owner

Warburg Pincus Partners GP LLC · CIK 0001621224 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,490,378

Underlying: Common Stock · 655,596 shares

Expires not disclosed

F1 · derivative.exercise_price: The Series B Preferred Stock and Series C Preferred Stock automatically converted into Common Stock on a 1:1 basis immediately prior to the completion of the Issuer's initial public offering of Common Stock and had no expiration date.

F9 · kind: WP X Finance exercised a warrant to purchase 1,071,902 shares of the Issuer's Series C Preferred Stock at a per share exercise price of $6.11. WP X Finance paid the exercise price on a cashless basis, resulting in the Issuer withholding 327,467 of the warrant shares to pay the exercise price and issued to WP X Finance the remaining 744,435 shares.

F12 · kind: WP X Finance exercised a warrant to purchase 1,074,072 shares of the Issuer's Series C Preferred Stock at a per share exercise price of $6.11. WP X Finance paid the exercise price on a cashless basis, resulting in the Issuer withholding 328,129 of the warrant shares to pay the exercise price and issued to WP X Finance the remaining 745,943 shares.

F18 · shares: These shares are comprised of 327,467 shares and 328,129 shares withheld by the Issuer pursuant to the net exercise of warrants, as detailed in footnotes (9) and (12).

F1 · derivative.exercise_date: The Series B Preferred Stock and Series C Preferred Stock automatically converted into Common Stock on a 1:1 basis immediately prior to the completion of the Issuer's initial public offering of Common Stock and had no expiration date.

F1 · derivative.expiration_date: The Series B Preferred Stock and Series C Preferred Stock automatically converted into Common Stock on a 1:1 basis immediately prior to the completion of the Issuer's initial public offering of Common Stock and had no expiration date.

F16 · ownership.direct: These shares are held by WP X Finance.

SEC source: 0001628280-19-004178 · wf-form4_155494791134305.xml · derivative · entry 10

WP X Finance, L.P. · CIK 0001770767 · 10% owner

WPX GP, L.P. · CIK 0001770772 · 10% owner

Warburg Pincus Private Equity X, L.P. · CIK 0001414565 · 10% owner

Warburg Pincus X Partners, L.P. · CIK 0001451560 · 10% owner

Warburg Pincus X, L.P. · CIK 0001414561 · 10% owner

Warburg Pincus X GP L.P. · CIK 0001414564 · 10% owner

WPP GP LLC · CIK 0001621874 · 10% owner

Warburg Pincus Partners, L.P. · CIK 0001621242 · 10% owner

Warburg Pincus Partners GP LLC · CIK 0001621224 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 68,652

Underlying: Common Stock · 68,652 shares

Expires not disclosed

F1 · derivative.exercise_price: The Series B Preferred Stock and Series C Preferred Stock automatically converted into Common Stock on a 1:1 basis immediately prior to the completion of the Issuer's initial public offering of Common Stock and had no expiration date.

F13 · kind: WPXP exercised a warrant to purchase 34,291 shares of the Issuer's Series C Preferred Stock at a per share exercise price of $6.11. WPXP paid the exercise price on a cashless basis, resulting in the Issuer withholding 10,476 of the warrant shares to pay the exercise price and issued to WPXP the remaining 23,815 shares.

F15 · kind: WPXP exercised a warrant to purchase 34,361 shares of the Issuer's Series C Preferred Stock at a per share exercise price of $6.11. WPXP paid the exercise price on a cashless basis, resulting in the Issuer withholding 10,498 of the warrant shares to pay the exercise price and issued to WPXP the remaining 23,863 shares.

F1 · derivative.exercise_date: The Series B Preferred Stock and Series C Preferred Stock automatically converted into Common Stock on a 1:1 basis immediately prior to the completion of the Issuer's initial public offering of Common Stock and had no expiration date.

F1 · derivative.expiration_date: The Series B Preferred Stock and Series C Preferred Stock automatically converted into Common Stock on a 1:1 basis immediately prior to the completion of the Issuer's initial public offering of Common Stock and had no expiration date.

F17 · ownership.direct: These shares are held by WPXP.

SEC source: 0001628280-19-004178 · wf-form4_155494791134305.xml · derivative · entry 9

WP X Finance, L.P. · CIK 0001770767 · 10% owner

WPX GP, L.P. · CIK 0001770772 · 10% owner

Warburg Pincus Private Equity X, L.P. · CIK 0001414565 · 10% owner

Warburg Pincus X Partners, L.P. · CIK 0001451560 · 10% owner

Warburg Pincus X, L.P. · CIK 0001414561 · 10% owner

Warburg Pincus X GP L.P. · CIK 0001414564 · 10% owner

WPP GP LLC · CIK 0001621874 · 10% owner

Warburg Pincus Partners, L.P. · CIK 0001621242 · 10% owner

Warburg Pincus Partners GP LLC · CIK 0001621224 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 2,145,974

Underlying: Common Stock · 2,145,974 shares

Expires not disclosed

F1 · derivative.exercise_price: The Series B Preferred Stock and Series C Preferred Stock automatically converted into Common Stock on a 1:1 basis immediately prior to the completion of the Issuer's initial public offering of Common Stock and had no expiration date.

F9 · kind: WP X Finance exercised a warrant to purchase 1,071,902 shares of the Issuer's Series C Preferred Stock at a per share exercise price of $6.11. WP X Finance paid the exercise price on a cashless basis, resulting in the Issuer withholding 327,467 of the warrant shares to pay the exercise price and issued to WP X Finance the remaining 744,435 shares.

F12 · kind: WP X Finance exercised a warrant to purchase 1,074,072 shares of the Issuer's Series C Preferred Stock at a per share exercise price of $6.11. WP X Finance paid the exercise price on a cashless basis, resulting in the Issuer withholding 328,129 of the warrant shares to pay the exercise price and issued to WP X Finance the remaining 745,943 shares.

F1 · derivative.exercise_date: The Series B Preferred Stock and Series C Preferred Stock automatically converted into Common Stock on a 1:1 basis immediately prior to the completion of the Issuer's initial public offering of Common Stock and had no expiration date.

F1 · derivative.expiration_date: The Series B Preferred Stock and Series C Preferred Stock automatically converted into Common Stock on a 1:1 basis immediately prior to the completion of the Issuer's initial public offering of Common Stock and had no expiration date.

F16 · ownership.direct: These shares are held by WP X Finance.

SEC source: 0001628280-19-004178 · wf-form4_155494791134305.xml · derivative · entry 8

WP X Finance, L.P. · CIK 0001770767 · 10% owner

WPX GP, L.P. · CIK 0001770772 · 10% owner

Warburg Pincus Private Equity X, L.P. · CIK 0001414565 · 10% owner

Warburg Pincus X Partners, L.P. · CIK 0001451560 · 10% owner

Warburg Pincus X, L.P. · CIK 0001414561 · 10% owner

Warburg Pincus X GP L.P. · CIK 0001414564 · 10% owner

WPP GP LLC · CIK 0001621874 · 10% owner

Warburg Pincus Partners, L.P. · CIK 0001621242 · 10% owner

Warburg Pincus Partners GP LLC · CIK 0001621224 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 34,361 shares

Expires 2023-10-13

F15 · kind: WPXP exercised a warrant to purchase 34,361 shares of the Issuer's Series C Preferred Stock at a per share exercise price of $6.11. WPXP paid the exercise price on a cashless basis, resulting in the Issuer withholding 10,498 of the warrant shares to pay the exercise price and issued to WPXP the remaining 23,863 shares.

F10 · derivative.exercise_date: All of the shares subject to the warrant are fully exercisable as of the date hereof.

F14 · ownership.direct: This warrant is held by WPXP.

SEC source: 0001628280-19-004178 · wf-form4_155494791134305.xml · derivative · entry 7

WP X Finance, L.P. · CIK 0001770767 · 10% owner

WPX GP, L.P. · CIK 0001770772 · 10% owner

Warburg Pincus Private Equity X, L.P. · CIK 0001414565 · 10% owner

Warburg Pincus X Partners, L.P. · CIK 0001451560 · 10% owner

Warburg Pincus X, L.P. · CIK 0001414561 · 10% owner

Warburg Pincus X GP L.P. · CIK 0001414564 · 10% owner

WPP GP LLC · CIK 0001621874 · 10% owner

Warburg Pincus Partners, L.P. · CIK 0001621242 · 10% owner

Warburg Pincus Partners GP LLC · CIK 0001621224 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 34,291 shares

Expires 2022-08-07

F13 · kind: WPXP exercised a warrant to purchase 34,291 shares of the Issuer's Series C Preferred Stock at a per share exercise price of $6.11. WPXP paid the exercise price on a cashless basis, resulting in the Issuer withholding 10,476 of the warrant shares to pay the exercise price and issued to WPXP the remaining 23,815 shares.

F10 · derivative.exercise_date: All of the shares subject to the warrant are fully exercisable as of the date hereof.

F14 · ownership.direct: This warrant is held by WPXP.

SEC source: 0001628280-19-004178 · wf-form4_155494791134305.xml · derivative · entry 6

WP X Finance, L.P. · CIK 0001770767 · 10% owner

WPX GP, L.P. · CIK 0001770772 · 10% owner

Warburg Pincus Private Equity X, L.P. · CIK 0001414565 · 10% owner

Warburg Pincus X Partners, L.P. · CIK 0001451560 · 10% owner

Warburg Pincus X, L.P. · CIK 0001414561 · 10% owner

Warburg Pincus X GP L.P. · CIK 0001414564 · 10% owner

WPP GP LLC · CIK 0001621874 · 10% owner

Warburg Pincus Partners, L.P. · CIK 0001621242 · 10% owner

Warburg Pincus Partners GP LLC · CIK 0001621224 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 1,074,072 shares

Expires 2023-10-13

F12 · kind: WP X Finance exercised a warrant to purchase 1,074,072 shares of the Issuer's Series C Preferred Stock at a per share exercise price of $6.11. WP X Finance paid the exercise price on a cashless basis, resulting in the Issuer withholding 328,129 of the warrant shares to pay the exercise price and issued to WP X Finance the remaining 745,943 shares.

F10 · derivative.exercise_date: All of the shares subject to the warrant are fully exercisable as of the date hereof.

F11 · ownership.direct: This warrant is held by WP X Finance.

SEC source: 0001628280-19-004178 · wf-form4_155494791134305.xml · derivative · entry 5

WP X Finance, L.P. · CIK 0001770767 · 10% owner

WPX GP, L.P. · CIK 0001770772 · 10% owner

Warburg Pincus Private Equity X, L.P. · CIK 0001414565 · 10% owner

Warburg Pincus X Partners, L.P. · CIK 0001451560 · 10% owner

Warburg Pincus X, L.P. · CIK 0001414561 · 10% owner

Warburg Pincus X GP L.P. · CIK 0001414564 · 10% owner

WPP GP LLC · CIK 0001621874 · 10% owner

Warburg Pincus Partners, L.P. · CIK 0001621242 · 10% owner

Warburg Pincus Partners GP LLC · CIK 0001621224 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 1,071,902 shares

Expires 2022-08-07

F9 · kind: WP X Finance exercised a warrant to purchase 1,071,902 shares of the Issuer's Series C Preferred Stock at a per share exercise price of $6.11. WP X Finance paid the exercise price on a cashless basis, resulting in the Issuer withholding 327,467 of the warrant shares to pay the exercise price and issued to WP X Finance the remaining 744,435 shares.

F10 · derivative.exercise_date: All of the shares subject to the warrant are fully exercisable as of the date hereof.

F11 · ownership.direct: This warrant is held by WP X Finance.

SEC source: 0001628280-19-004178 · wf-form4_155494791134305.xml · derivative · entry 4

WP X Finance, L.P. · CIK 0001770767 · 10% owner

WPX GP, L.P. · CIK 0001770772 · 10% owner

Warburg Pincus Private Equity X, L.P. · CIK 0001414565 · 10% owner

Warburg Pincus X Partners, L.P. · CIK 0001451560 · 10% owner

Warburg Pincus X, L.P. · CIK 0001414561 · 10% owner

Warburg Pincus X GP L.P. · CIK 0001414564 · 10% owner

WPP GP LLC · CIK 0001621874 · 10% owner

Warburg Pincus Partners, L.P. · CIK 0001621242 · 10% owner

Warburg Pincus Partners GP LLC · CIK 0001621224 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 5,904,180 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: The Series B Preferred Stock and Series C Preferred Stock automatically converted into Common Stock on a 1:1 basis immediately prior to the completion of the Issuer's initial public offering of Common Stock and had no expiration date.

F1 · derivative.exercise_date: The Series B Preferred Stock and Series C Preferred Stock automatically converted into Common Stock on a 1:1 basis immediately prior to the completion of the Issuer's initial public offering of Common Stock and had no expiration date.

F1 · derivative.expiration_date: The Series B Preferred Stock and Series C Preferred Stock automatically converted into Common Stock on a 1:1 basis immediately prior to the completion of the Issuer's initial public offering of Common Stock and had no expiration date.

F8 · ownership.direct: 5,721,152 of these shares are held by WP X Finance and 183,028 of these shares are held by WPXP.

SEC source: 0001628280-19-004178 · wf-form4_155494791134305.xml · derivative · entry 3

WP X Finance, L.P. · CIK 0001770767 · 10% owner

WPX GP, L.P. · CIK 0001770772 · 10% owner

Warburg Pincus Private Equity X, L.P. · CIK 0001414565 · 10% owner

Warburg Pincus X Partners, L.P. · CIK 0001451560 · 10% owner

Warburg Pincus X, L.P. · CIK 0001414561 · 10% owner

Warburg Pincus X GP L.P. · CIK 0001414564 · 10% owner

WPP GP LLC · CIK 0001621874 · 10% owner

Warburg Pincus Partners, L.P. · CIK 0001621242 · 10% owner

Warburg Pincus Partners GP LLC · CIK 0001621224 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 5,637,492 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: The Series B Preferred Stock and Series C Preferred Stock automatically converted into Common Stock on a 1:1 basis immediately prior to the completion of the Issuer's initial public offering of Common Stock and had no expiration date.

F1 · derivative.exercise_date: The Series B Preferred Stock and Series C Preferred Stock automatically converted into Common Stock on a 1:1 basis immediately prior to the completion of the Issuer's initial public offering of Common Stock and had no expiration date.

F1 · derivative.expiration_date: The Series B Preferred Stock and Series C Preferred Stock automatically converted into Common Stock on a 1:1 basis immediately prior to the completion of the Issuer's initial public offering of Common Stock and had no expiration date.

F7 · ownership.direct: 5,462,731 of these shares are held by WP X Finance and 174,761 of these shares are held by WPXP.

SEC source: 0001628280-19-004178 · wf-form4_155494791134305.xml · nonDerivative · entry 2

WP X Finance, L.P. · CIK 0001770767 · 10% owner

WPX GP, L.P. · CIK 0001770772 · 10% owner

Warburg Pincus Private Equity X, L.P. · CIK 0001414565 · 10% owner

Warburg Pincus X Partners, L.P. · CIK 0001451560 · 10% owner

Warburg Pincus X, L.P. · CIK 0001414561 · 10% owner

Warburg Pincus X GP L.P. · CIK 0001414564 · 10% owner

WPP GP LLC · CIK 0001621874 · 10% owner

Warburg Pincus Partners, L.P. · CIK 0001621242 · 10% owner

Warburg Pincus Partners GP LLC · CIK 0001621224 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 12,199,629

F5 · kind: 872,100 shares were sold by WP X Finance, and 27,900 shares were sold by WPXP, each in connection with the exercise of the underwriter's overallotment option pursuant to the Issuer's initial public offering of Common Stock.

F6 · balance_after: 11,821,446 of these shares are held by WP X Finance and 378,183 of these shares are held by WPXP.

SEC source: 0001628280-19-004178 · wf-form4_155494791134305.xml · nonDerivative · entry 1

WP X Finance, L.P. · CIK 0001770767 · 10% owner

WPX GP, L.P. · CIK 0001770772 · 10% owner

Warburg Pincus Private Equity X, L.P. · CIK 0001414565 · 10% owner

Warburg Pincus X Partners, L.P. · CIK 0001451560 · 10% owner

Warburg Pincus X, L.P. · CIK 0001414561 · 10% owner

Warburg Pincus X GP L.P. · CIK 0001414564 · 10% owner

WPP GP LLC · CIK 0001621874 · 10% owner

Warburg Pincus Partners, L.P. · CIK 0001621242 · 10% owner

Warburg Pincus Partners GP LLC · CIK 0001621224 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 13,099,629

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · price: The Series B Preferred Stock and Series C Preferred Stock automatically converted into Common Stock on a 1:1 basis immediately prior to the completion of the Issuer's initial public offering of Common Stock and had no expiration date.

F2 · balance_after: 12,693,546 of these shares are held by WP X Finance, L.P. ("WP X Finance") and 406,083 of these shares are held by Warburg Pincus X Partners, L.P. ("WPXP"). The total of 13,099,629 shares beneficially owned is comprised of (i) 19,901 shares of Common Stock held prior to the date hereof (ii) 5,637,492 shares of Common Stock issued upon conversion of Series B Preferred Stock held prior to the date hereof, (iii) 5,904,180 shares of Common Stock issued upon conversion of Series C Preferred Stock held prior to the date hereof, and (iv) 1,538,056 shares of Common Stock issued upon conversion of Series C Preferred Stock issued pursuant to the net exercise of warrants, as detailed in footnotes (9), (12), (13) and (15).

F3 · balance_after: WPX GP, L.P., a Delaware limited partnership ("WPX GP"), is the managing general partner of WP X Finance. Warburg Pincus Private Equity X, L.P., a Delaware limited partnership ("WP X"), is the general partner of WPX GP. Warburg Pincus X, L.P., a Delaware limited partnership ("WPX LP"), is the general partner of WPX and WPXP. Warburg Pincus X GP L.P., a Delaware limited partnership ("WP X GP LP"), is the general partner of WPX LP. WPP GP LLC, a Delaware limited liability company ("WPP GP"), is the general partner of WP X GP LP. Warburg Pincus Partners, L.P., a Delaware limited partnership ("WP Partners"), is the managing member of WPP GP. Warburg Pincus Partners GP LLC, a Delaware limited liability company ("WP Partners GP"), is the general partner of WP Partners.

F4 · balance_after: (continuation from footnote 3) Warburg Pincus & Co., a New York general partnership ("WP"), is the managing member of WP Partners GP. Charles R. Kaye and Joseph P. Landy are each Managing General Partners of WP and may each be deemed to control the Warburg Pincus entities. Messrs. Kaye and Landy disclaim beneficial ownership of all shares held by the Warburg Pincus entities.

SEC source: 0000903423-19-000155 · wp2.xml · nonDerivative · entry 1

Warburg Pincus (Europa-II) Private Equity X, L.P. · CIK 0001617521 · Director

Warburg Pincus Partners GP LLC · CIK 0001621224 · Director

Warburg Pincus (Callisto-II) Private Equity X, L.P. · CIK 0001617518 · Director

Warburg Pincus X Partners, L.P. · CIK 0001451560 · Director

Warburg Pincus (Europa) X LLC · CIK 0001617563 · Director

Warburg Pincus (Ganymede) X LLC · CIK 0001617558 · Director

Warburg Pincus X, L.P. · CIK 0001414561 · Director

Warburg Pincus X GP L.P. · CIK 0001414564 · Director

WPP GP LLC · CIK 0001621874 · Director

Warburg Pincus Partners, L.P. · CIK 0001621242 · Director

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 7,132,790

F1 · kind: The amount sold by each WP Shareholder (defined below) are as follows: (i) Warburg Pincus (Callisto-II) Private Equity X, L.P., a Delaware limited partnership ("WP Callisto-II"), selling 2,294,552 Common Shares, (ii) Warburg Pincus (Ganymede-II) Private Equity X, L.P., a Delaware limited partnership ("WP Ganymede-II"), selling 2,302,523 Common Shares, (iii) Warburg Pincus X Partners, L.P., a Delaware limited partnership ("WP X Partners"), selling 221,779 Common Shares and (iv) Warburg Pincus (Europa-II) Private Equity X, L.P., a Delaware limited partnership ("WP Europa-II", and together with WP X Partners, WP Callisto-II and WP Ganymede-II, the "WP Shareholders", each a "WP Shareholder"), selling 2,313,936 Common Shares.

F2 · ownership.direct: Warburg Pincus (Europa) X LLC, a Delaware limited liability company ("WP Europa"), is the general partner of WP Europa II. Warburg Pincus (Ganymede) X LLC, a Delaware limited liability company ("WP Ganymede"), is the general partner of WP Ganymede II. Warburg Pincus X, L.P., a Delaware limited partnership ("WP X LP"), is (i) the general partner of WP X Partners and WP Callisto-II, and (ii) the managing member of WP Europa and WP Ganymede. Warburg Pincus X GP L.P., a Delaware limited partnership ("WP X GP"), is the general partner of WP X LP. WPP GP LLC, a Delaware limited liability company ("WPP GP"), is the general partner of WP X GP.

F3 · ownership.direct: Warburg Pincus Partners, L.P., a Delaware limited partnership ("WP Partners"), is the managing member of WPP GP. Warburg Pincus Partners GP LLC, a Delaware limited liability company ("WPP GP LLC"), is the general partner of WP Partners. Warburg Pincus & Co., a New York general partnership ("WP"), is the managing member of WPP GP LLC. Warburg Pincus LLC, a New York limited liability company ("WP LLC", and together with the WP Shareholders, WP Europa, WP Ganymede, WP X LP, WP X GP, WPP GP, WP Partners, WPP GP LLC and WP, the "Warburg Pincus Entities"), is the manager of the WP Shareholders.

F4 · ownership.direct: Charles R. Kaye and Joseph P. Landy (Messrs. Kaye and Landy, together with the Warburg Pincus Entities, the "Warburg Pincus Reporting Persons") are each a (i) Managing General Partner of WP and (ii) Managing Member and Co-Chief Executive Officer of WP LLC, and may have be deemed to control the Warburg Pincus Entities and to have been the beneficial owners of the Common Shares held by the WP Shareholders.

F5 · ownership.direct: In addition to the 7,132,790 Common Shares Mr. Kaye may have been deemed to have indirect beneficial ownership by virtue of his status as Managing General Partner of WP and Managing Member and Co-Chief Executive Officer of WP LLC, Mr. Kaye may be deemed to have beneficial ownership over an additional 4,419 Common Shares, all of which were distributed on November 13, 2017, when the WP Shareholders made a pro rata distribution in kind of 2,496,592 Common Shares to their limited partners (the "Distribution"). Such 4,419 Common Shares are held as follows: 1,473 Common Shares by The Nicole Kaye 2013 GST Trust; 1,473 Common Shares by The Sydney Kaye 2013 GST Trust; and 1,473 Common Shares by The Tyler Kaye 2013 GST Trust.

F6 · ownership.direct: In addition to the 7,132,790 Common Shares Mr. Landy may have been deemed to have indirect beneficial ownership by virtue of his status as Managing General Partner of WP and Managing Member and Co-Chief Executive Officer of WP LLC, Mr. Landy may be deemed to have beneficial ownership over an additional 8,500 Common Shares, all of which were distributed in the Distribution. Such 8,500 Common Shares are held by Landy Family Trust u/a DTD 9/10/01.

F7 · ownership.direct: Pursuant to Rule 16a-1(a)(4) of the Exchange Act of 1934, as amended (the "Exchange Act"), each of the Warburg Pincus Reporting Persons, other than the WP Shareholders, herein states that this Form 4 shall not be deemed an admission that it or he is or was the beneficial owner of any of the Common Shares of the Issuer reported in this Form 4. Each of WP Europa, WP Ganymede, WP X LP, WP X GP, WPP GP, WP Partners, WPP GP LLC, WP, WP LLC and Messrs. Kaye and Landy disclaimed beneficial ownership of the Common Shares, except to the extent of its or his pecuniary interest in such Common Shares.

F8 · ownership.direct: Information with respect to each Warburg Pincus Reporting Person is given solely by such Warburg Pincus Reporting Person, and none of the Warburg Pincus Reporting Persons has responsibility for the accuracy or completeness of information supplied by another of the Warburg Pincus Reporting Persons, respectively.

F9 · ownership.direct: Solely for the purposes of Section 16 of the Exchange Act, each of the WP Shareholders, WP Europa, WP Ganymede, WP X LP, WP X GP, WPP GP, WP Partners, WPP GP LLC, and WP may have been deemed a director-by-deputization by virtue of their contractual right to appoint one or more directors to the board of directors of the Issuer, pursuant to that certain Sponsor Shareholders Agreement (Warburg Pincus), by and among the Issuer and the shareholders party thereto, dated as of November 9, 2015, as amended.

F10 · ownership.direct: Because no more than 10 reporting persons can file any one Form 4 through the Securities and Exchange Commission's EDGAR system, Warburg Pincus (Ganymede-II) Private Equity X, L.P., Warburg Pincus & Co., Warburg Pincus LLC and Messrs. Charles R. Kaye and Joseph P. Landy have made a separate Form 4 filing.

SEC source: 0000903423-19-000185 · wp2.xml · nonDerivative · entry 1

Warburg Pincus (Europa-II) Private Equity X, L.P. · CIK 0001617521 · Director

Warburg Pincus Partners GP LLC · CIK 0001621224 · Director

Warburg Pincus (Callisto-II) Private Equity X, L.P. · CIK 0001617518 · Director

Warburg Pincus X Partners, L.P. · CIK 0001451560 · Director

Warburg Pincus (Europa) X LLC · CIK 0001617563 · Director

Warburg Pincus (Ganymede) X LLC · CIK 0001617558 · Director

Warburg Pincus X, L.P. · CIK 0001414561 · Director

Warburg Pincus X GP L.P. · CIK 0001414564 · Director

WPP GP LLC · CIK 0001621874 · Director

Warburg Pincus Partners, L.P. · CIK 0001621242 · Director

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

F1 · kind: The amount sold by each WP Shareholder (defined below) are as follows: (i) Warburg Pincus (Callisto-II) Private Equity X, L.P., a Delaware limited partnership ("WP Callisto-II"), selling 2,294,552 Common Shares, (ii) Warburg Pincus (Ganymede-II) Private Equity X, L.P., a Delaware limited partnership ("WP Ganymede-II"), selling 2,302,523 Common Shares, (iii) Warburg Pincus X Partners, L.P., a Delaware limited partnership ("WP X Partners"), selling 221,779 Common Shares and (iv) Warburg Pincus (Europa-II) Private Equity X, L.P., a Delaware limited partnership ("WP Europa-II", and together with WP X Partners, WP Callisto-II and WP Ganymede-II, the "WP Shareholders", each a "WP Shareholder"), selling 2,313,936 Common Shares.

F11 · balance_after: This Form 4 Amendment is being filed solely to correct a typographical error in column 5 of Table I of the original Form 4 filed on March 21, 2019.

F2 · ownership.direct: Warburg Pincus (Europa) X LLC, a Delaware limited liability company ("WP Europa"), is the general partner of WP Europa II. Warburg Pincus (Ganymede) X LLC, a Delaware limited liability company ("WP Ganymede"), is the general partner of WP Ganymede II. Warburg Pincus X, L.P., a Delaware limited partnership ("WP X LP"), is (i) the general partner of WP X Partners and WP Callisto-II, and (ii) the managing member of WP Europa and WP Ganymede. Warburg Pincus X GP L.P., a Delaware limited partnership ("WP X GP"), is the general partner of WP X LP. WPP GP LLC, a Delaware limited liability company ("WPP GP"), is the general partner of WP X GP.

F3 · ownership.direct: Warburg Pincus Partners, L.P., a Delaware limited partnership ("WP Partners"), is the managing member of WPP GP. Warburg Pincus Partners GP LLC, a Delaware limited liability company ("WPP GP LLC"), is the general partner of WP Partners. Warburg Pincus & Co., a New York general partnership ("WP"), is the managing member of WPP GP LLC. Warburg Pincus LLC, a New York limited liability company ("WP LLC", and together with the WP Shareholders, WP Europa, WP Ganymede, WP X LP, WP X GP, WPP GP, WP Partners, WPP GP LLC and WP, the "Warburg Pincus Entities"), is the manager of the WP Shareholders.

F4 · ownership.direct: Charles R. Kaye and Joseph P. Landy (Messrs. Kaye and Landy, together with the Warburg Pincus Entities, the "Warburg Pincus Reporting Persons") are each a (i) Managing General Partner of WP and (ii) Managing Member and Co-Chief Executive Officer of WP LLC, and may have be deemed to control the Warburg Pincus Entities and to have been the beneficial owners of the Common Shares held by the WP Shareholders.

F5 · ownership.direct: In addition to the 7,132,790 Common Shares Mr. Kaye may have been deemed to have indirect beneficial ownership by virtue of his status as Managing General Partner of WP and Managing Member and Co-Chief Executive Officer of WP LLC, Mr. Kaye may be deemed to have beneficial ownership over an additional 4,419 Common Shares, all of which were distributed on November 13, 2017, when the WP Shareholders made a pro rata distribution in kind of 2,496,592 Common Shares to their limited partners (the "Distribution"). Such 4,419 Common Shares are held as follows: 1,473 Common Shares by The Nicole Kaye 2013 GST Trust; 1,473 Common Shares by The Sydney Kaye 2013 GST Trust; and 1,473 Common Shares by The Tyler Kaye 2013 GST Trust.

F6 · ownership.direct: In addition to the 7,132,790 Common Shares Mr. Landy may have been deemed to have indirect beneficial ownership by virtue of his status as Managing General Partner of WP and Managing Member and Co-Chief Executive Officer of WP LLC, Mr. Landy may be deemed to have beneficial ownership over an additional 8,500 Common Shares, all of which were distributed in the Distribution. Such 8,500 Common Shares are held by Landy Family Trust u/a DTD 9/10/01.

F7 · ownership.direct: Pursuant to Rule 16a-1(a)(4) of the Exchange Act of 1934, as amended (the "Exchange Act"), each of the Warburg Pincus Reporting Persons, other than the WP Shareholders, herein states that this Form 4 shall not be deemed an admission that it or he is or was the beneficial owner of any of the Common Shares of the Issuer reported in this Form 4. Each of WP Europa, WP Ganymede, WP X LP, WP X GP, WPP GP, WP Partners, WPP GP LLC, WP, WP LLC and Messrs. Kaye and Landy disclaimed beneficial ownership of the Common Shares, except to the extent of its or his pecuniary interest in such Common Shares.

F8 · ownership.direct: Information with respect to each Warburg Pincus Reporting Person is given solely by such Warburg Pincus Reporting Person, and none of the Warburg Pincus Reporting Persons has responsibility for the accuracy or completeness of information supplied by another of the Warburg Pincus Reporting Persons, respectively.

F9 · ownership.direct: Solely for the purposes of Section 16 of the Exchange Act, each of the WP Shareholders, WP Europa, WP Ganymede, WP X LP, WP X GP, WPP GP, WP Partners, WPP GP LLC, and WP may have been deemed a director-by-deputization by virtue of their contractual right to appoint one or more directors to the board of directors of the Issuer, pursuant to that certain Sponsor Shareholders Agreement (Warburg Pincus), by and among the Issuer and the shareholders party thereto, dated as of November 9, 2015, as amended.

F10 · ownership.direct: Because no more than 10 reporting persons can file any one Form 4 through the Securities and Exchange Commission's EDGAR system, Warburg Pincus (Ganymede-II) Private Equity X, L.P., Warburg Pincus & Co., Warburg Pincus LLC and Messrs. Charles R. Kaye and Joseph P. Landy have made a separate Form 4 filing.

SEC source: 0000899243-19-007792 · doc4.xml · nonDerivative · entry 8

Warburg Pincus Private Equity X O&G, L.P. · CIK 0001528258 · Director · 10% owner

Warburg Pincus X, L.P. · CIK 0001414561 · Director · 10% owner

Warburg Pincus X GP L.P. · CIK 0001414564 · Director · 10% owner

WPP GP LLC · CIK 0001621874 · Director · 10% owner

Warburg Pincus Partners, L.P. · CIK 0001621242 · Director · 10% owner

Warburg Pincus Partners GP LLC · CIK 0001621224 · Director · 10% owner

WARBURG PINCUS & CO. · CIK 0000929408 · Director · 10% owner

WARBURG PINCUS LLC · CIK 0001162870 · Director · 10% owner

KAYE CHARLES R · CIK 0001239318 · 10% owner

Landy Joseph P. · CIK 0001220638 · 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: 55,109,589

F1 · kind: On March 12, 2019, in connection with the conversion of Antero Midstream GP LP ("AMGP") from a limited partnership to a corporation named Antero Midstream Corporation ("New AM") under the laws of the State of Delaware (the "Conversion"), each common share representing limited partnership interests of AMGP (the "AMGP Common Shares") was converted into one share of common stock of New AM ("New AM Common Shares").

F1 · price: On March 12, 2019, in connection with the conversion of Antero Midstream GP LP ("AMGP") from a limited partnership to a corporation named Antero Midstream Corporation ("New AM") under the laws of the State of Delaware (the "Conversion"), each common share representing limited partnership interests of AMGP (the "AMGP Common Shares") was converted into one share of common stock of New AM ("New AM Common Shares").

F2 · ownership.nature: This Form 4 is filed on behalf of Warburg Pincus Private Equity X O&G, L.P., a Delaware limited partnership ("WP X O&G" and, together with its affiliated partnership, Warburg Pincus X Partners, L.P., a Delaware limited partnership ("WP X Partners"), the "WP X O&G Funds"). As of March 12, 2019, prior to the Conversion, the Warburg Pincus Entities (as defined below) collectively owned 55,109,589 AMGP Common Shares, of which (a) 34,834,296 are owned by WP X O&G and 1,114,410 are owned by WP X Partners, for an aggregate total of 35,948,706 AMGP Common Shares owned by the WP X O&G Funds, and (b) 19,160,883 are owned by the WP VIII Funds (as defined below).

F3 · ownership.nature: (Continued from Footnote 2) As of March 12, 2019, after the Conversion, the Warburg Pincus Entities collectively own 55,109,589 New AM Common Shares, of which (i) 34,834,296 are owned by WP X O&G and 1,114,410 are owned by WP X Partners, for an aggregate total of 35,948,706 New AM Common Shares owned by the WP X O&G Funds, and (ii) 19,160,883 are owned by the WP VIII Funds.

F4 · ownership.nature: The Warburg Pincus funds are the WP X O&G Funds and Warburg Pincus Private Equity VIII, L.P., a Delaware limited partnership ("WP VIII"), and its two affiliated partnerships, Warburg Pincus Netherlands Private Equity VIII C.V. I, a limited partnership formed under the laws of the Netherlands ("WP VIII CV I"), and WP-WPVIII Investors, L.P., a Delaware limited partnership ("WP-WPVIII Investors"), and together with WP VIII and WP VIII CV I, the "WP VIII Funds").

F5 · ownership.nature: Warburg Pincus X, L.P., a Delaware limited partnership ("WP X GP"), is the general partner of each of the WP X O&G Funds. Warburg Pincus X GP L.P., a Delaware limited partnership ("WP X GP LP"), is the general partner of WP X GP. WPP GP LLC, a Delaware limited liability company ("WPP GP"), is the general partner of (a) WP X GP, and (b) WP-WPVIII Investors GP L.P., a Delaware limited partnership ("WP-WPVIII GP"), which, in turn, is the general partner of WP-WPVIII Investors. Warburg Pincus Partners, L.P., a Delaware limited partnership ("WP Partners"), is (i) the managing member of WPP GP, and (ii) the general partner of WP VIII and WP VIII CV I. Warburg Pincus Partners GP LLC, a Delaware limited liability company ("WP Partners GP"), is the general partner of WP Partners.

F6 · ownership.nature: Warburg Pincus & Co., a New York general partnership ("WP"), is the managing member of WP Partners GP. Warburg Pincus LLC, a New York limited liability company ("WP LLC"), is the manager of each of the WP X O&G Funds and the WP VIII Funds.

F7 · ownership.nature: Each of the WP X O&G Funds, the WP VIII Funds, WP-WPVIII GP, WP X GP, WP X GP LP, WPP GP, WP Partners, WP Partners GP, WP and WP LLC are collectively referred to herein as the "Warburg Pincus Entities." Charles R. Kaye and Joseph P. Landy are each Managing General Partners of WP and Managing Members and Co-Chief Executive Officers of WP LLC and may be deemed to control the Warburg Pincus Entities.

F8 · ownership.nature: By reason of the provisions of Rule 16a-1 of the Securities Exchange Act of 1934, as amended (the "Exchange Act"), (a) WP X GP, WP X GP LP, WPP GP, WP Partners, WP Partners GP, WP, WP LLC, and Messrs. Kaye and Landy and certain affiliates may be deemed to be beneficial owners of the 35,948,706 AMGP Common Shares (prior to the Conversion) and the 35,948,706 New AM Common Shares (after the Conversion) held collectively by the WP X O&G Funds, and (b) WPP GP, WP Partners, WP Partners GP, WP, WP LLC, and Messrs. Kaye and Landy and certain affiliates may be deemed to be beneficial owners of the 19,160,883 AMGP Common Shares (prior to the Conversion) and the 19,160,883 New AM Common Shares (after the Conversion) held collectively by the WP VIII Funds.

F9 · ownership.nature: (Continued from Footnote 8) The Warburg Pincus Entities, Messrs. Kaye and Landy and such affiliates disclaim beneficial ownership of such AMGP Common Shares and such New AM Common Shares except to the extent of their pecuniary interest therein. Each of WP X O&G, WP X GP, WP X GP LP, WPP GP, WP Partners, WP Partners GP, WP and WP LLC is a director-by-deputization solely for purposes of Section 16 of the Exchange Act.

F10 · ownership.nature: WP X GP and WP X GP LP each indirectly holds, and therefore may be deemed to be the beneficial owner of, the 35,948,706 AMGP Common Shares (prior to the Conversion) and the 35,948,706 New AM Common Shares (after the Conversion) directly held by the WP X O&G Funds.

F11 · ownership.nature: WPP GP indirectly holds, and therefore may be deemed to be the beneficial owner of, the 36,002,529 AMGP Common Shares (prior to the Conversion) and the 36,002,529 New AM Common Shares (after the conversion) directly held by WP-WPVIII Investors and the WP X O&G Funds.

F12 · ownership.nature: WP Partners, WP Partners GP, WP and WP LLC each indirectly holds, and therefore may be deemed to be the beneficial owner of, the 55,109,589 AMGP Common Shares (prior to the Conversion) and the 55,109,589 New AM Common Shares directly held by the WP VIII Funds and the WP X O&G Funds.

SEC source: 0000899243-19-007792 · doc4.xml · nonDerivative · entry 7

Warburg Pincus Private Equity X O&G, L.P. · CIK 0001528258 · Director · 10% owner

Warburg Pincus X, L.P. · CIK 0001414561 · Director · 10% owner

Warburg Pincus X GP L.P. · CIK 0001414564 · Director · 10% owner

WPP GP LLC · CIK 0001621874 · Director · 10% owner

Warburg Pincus Partners, L.P. · CIK 0001621242 · Director · 10% owner

Warburg Pincus Partners GP LLC · CIK 0001621224 · Director · 10% owner

WARBURG PINCUS & CO. · CIK 0000929408 · Director · 10% owner

WARBURG PINCUS LLC · CIK 0001162870 · Director · 10% owner

KAYE CHARLES R · CIK 0001239318 · 10% owner

Landy Joseph P. · CIK 0001220638 · 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: 36,002,529

F1 · kind: On March 12, 2019, in connection with the conversion of Antero Midstream GP LP ("AMGP") from a limited partnership to a corporation named Antero Midstream Corporation ("New AM") under the laws of the State of Delaware (the "Conversion"), each common share representing limited partnership interests of AMGP (the "AMGP Common Shares") was converted into one share of common stock of New AM ("New AM Common Shares").

F1 · price: On March 12, 2019, in connection with the conversion of Antero Midstream GP LP ("AMGP") from a limited partnership to a corporation named Antero Midstream Corporation ("New AM") under the laws of the State of Delaware (the "Conversion"), each common share representing limited partnership interests of AMGP (the "AMGP Common Shares") was converted into one share of common stock of New AM ("New AM Common Shares").

F2 · ownership.nature: This Form 4 is filed on behalf of Warburg Pincus Private Equity X O&G, L.P., a Delaware limited partnership ("WP X O&G" and, together with its affiliated partnership, Warburg Pincus X Partners, L.P., a Delaware limited partnership ("WP X Partners"), the "WP X O&G Funds"). As of March 12, 2019, prior to the Conversion, the Warburg Pincus Entities (as defined below) collectively owned 55,109,589 AMGP Common Shares, of which (a) 34,834,296 are owned by WP X O&G and 1,114,410 are owned by WP X Partners, for an aggregate total of 35,948,706 AMGP Common Shares owned by the WP X O&G Funds, and (b) 19,160,883 are owned by the WP VIII Funds (as defined below).

F3 · ownership.nature: (Continued from Footnote 2) As of March 12, 2019, after the Conversion, the Warburg Pincus Entities collectively own 55,109,589 New AM Common Shares, of which (i) 34,834,296 are owned by WP X O&G and 1,114,410 are owned by WP X Partners, for an aggregate total of 35,948,706 New AM Common Shares owned by the WP X O&G Funds, and (ii) 19,160,883 are owned by the WP VIII Funds.

F4 · ownership.nature: The Warburg Pincus funds are the WP X O&G Funds and Warburg Pincus Private Equity VIII, L.P., a Delaware limited partnership ("WP VIII"), and its two affiliated partnerships, Warburg Pincus Netherlands Private Equity VIII C.V. I, a limited partnership formed under the laws of the Netherlands ("WP VIII CV I"), and WP-WPVIII Investors, L.P., a Delaware limited partnership ("WP-WPVIII Investors"), and together with WP VIII and WP VIII CV I, the "WP VIII Funds").

F5 · ownership.nature: Warburg Pincus X, L.P., a Delaware limited partnership ("WP X GP"), is the general partner of each of the WP X O&G Funds. Warburg Pincus X GP L.P., a Delaware limited partnership ("WP X GP LP"), is the general partner of WP X GP. WPP GP LLC, a Delaware limited liability company ("WPP GP"), is the general partner of (a) WP X GP, and (b) WP-WPVIII Investors GP L.P., a Delaware limited partnership ("WP-WPVIII GP"), which, in turn, is the general partner of WP-WPVIII Investors. Warburg Pincus Partners, L.P., a Delaware limited partnership ("WP Partners"), is (i) the managing member of WPP GP, and (ii) the general partner of WP VIII and WP VIII CV I. Warburg Pincus Partners GP LLC, a Delaware limited liability company ("WP Partners GP"), is the general partner of WP Partners.

F6 · ownership.nature: Warburg Pincus & Co., a New York general partnership ("WP"), is the managing member of WP Partners GP. Warburg Pincus LLC, a New York limited liability company ("WP LLC"), is the manager of each of the WP X O&G Funds and the WP VIII Funds.

F7 · ownership.nature: Each of the WP X O&G Funds, the WP VIII Funds, WP-WPVIII GP, WP X GP, WP X GP LP, WPP GP, WP Partners, WP Partners GP, WP and WP LLC are collectively referred to herein as the "Warburg Pincus Entities." Charles R. Kaye and Joseph P. Landy are each Managing General Partners of WP and Managing Members and Co-Chief Executive Officers of WP LLC and may be deemed to control the Warburg Pincus Entities.

F8 · ownership.nature: By reason of the provisions of Rule 16a-1 of the Securities Exchange Act of 1934, as amended (the "Exchange Act"), (a) WP X GP, WP X GP LP, WPP GP, WP Partners, WP Partners GP, WP, WP LLC, and Messrs. Kaye and Landy and certain affiliates may be deemed to be beneficial owners of the 35,948,706 AMGP Common Shares (prior to the Conversion) and the 35,948,706 New AM Common Shares (after the Conversion) held collectively by the WP X O&G Funds, and (b) WPP GP, WP Partners, WP Partners GP, WP, WP LLC, and Messrs. Kaye and Landy and certain affiliates may be deemed to be beneficial owners of the 19,160,883 AMGP Common Shares (prior to the Conversion) and the 19,160,883 New AM Common Shares (after the Conversion) held collectively by the WP VIII Funds.

F9 · ownership.nature: (Continued from Footnote 8) The Warburg Pincus Entities, Messrs. Kaye and Landy and such affiliates disclaim beneficial ownership of such AMGP Common Shares and such New AM Common Shares except to the extent of their pecuniary interest therein. Each of WP X O&G, WP X GP, WP X GP LP, WPP GP, WP Partners, WP Partners GP, WP and WP LLC is a director-by-deputization solely for purposes of Section 16 of the Exchange Act.

F10 · ownership.nature: WP X GP and WP X GP LP each indirectly holds, and therefore may be deemed to be the beneficial owner of, the 35,948,706 AMGP Common Shares (prior to the Conversion) and the 35,948,706 New AM Common Shares (after the Conversion) directly held by the WP X O&G Funds.

F11 · ownership.nature: WPP GP indirectly holds, and therefore may be deemed to be the beneficial owner of, the 36,002,529 AMGP Common Shares (prior to the Conversion) and the 36,002,529 New AM Common Shares (after the conversion) directly held by WP-WPVIII Investors and the WP X O&G Funds.

SEC source: 0000899243-19-007792 · doc4.xml · nonDerivative · entry 6

Warburg Pincus Private Equity X O&G, L.P. · CIK 0001528258 · Director · 10% owner

Warburg Pincus X, L.P. · CIK 0001414561 · Director · 10% owner

Warburg Pincus X GP L.P. · CIK 0001414564 · Director · 10% owner

WPP GP LLC · CIK 0001621874 · Director · 10% owner

Warburg Pincus Partners, L.P. · CIK 0001621242 · Director · 10% owner

Warburg Pincus Partners GP LLC · CIK 0001621224 · Director · 10% owner

WARBURG PINCUS & CO. · CIK 0000929408 · Director · 10% owner

WARBURG PINCUS LLC · CIK 0001162870 · Director · 10% owner

KAYE CHARLES R · CIK 0001239318 · 10% owner

Landy Joseph P. · CIK 0001220638 · 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: 35,948,706

F1 · kind: On March 12, 2019, in connection with the conversion of Antero Midstream GP LP ("AMGP") from a limited partnership to a corporation named Antero Midstream Corporation ("New AM") under the laws of the State of Delaware (the "Conversion"), each common share representing limited partnership interests of AMGP (the "AMGP Common Shares") was converted into one share of common stock of New AM ("New AM Common Shares").

F1 · price: On March 12, 2019, in connection with the conversion of Antero Midstream GP LP ("AMGP") from a limited partnership to a corporation named Antero Midstream Corporation ("New AM") under the laws of the State of Delaware (the "Conversion"), each common share representing limited partnership interests of AMGP (the "AMGP Common Shares") was converted into one share of common stock of New AM ("New AM Common Shares").

F2 · ownership.nature: This Form 4 is filed on behalf of Warburg Pincus Private Equity X O&G, L.P., a Delaware limited partnership ("WP X O&G" and, together with its affiliated partnership, Warburg Pincus X Partners, L.P., a Delaware limited partnership ("WP X Partners"), the "WP X O&G Funds"). As of March 12, 2019, prior to the Conversion, the Warburg Pincus Entities (as defined below) collectively owned 55,109,589 AMGP Common Shares, of which (a) 34,834,296 are owned by WP X O&G and 1,114,410 are owned by WP X Partners, for an aggregate total of 35,948,706 AMGP Common Shares owned by the WP X O&G Funds, and (b) 19,160,883 are owned by the WP VIII Funds (as defined below).

F3 · ownership.nature: (Continued from Footnote 2) As of March 12, 2019, after the Conversion, the Warburg Pincus Entities collectively own 55,109,589 New AM Common Shares, of which (i) 34,834,296 are owned by WP X O&G and 1,114,410 are owned by WP X Partners, for an aggregate total of 35,948,706 New AM Common Shares owned by the WP X O&G Funds, and (ii) 19,160,883 are owned by the WP VIII Funds.

F4 · ownership.nature: The Warburg Pincus funds are the WP X O&G Funds and Warburg Pincus Private Equity VIII, L.P., a Delaware limited partnership ("WP VIII"), and its two affiliated partnerships, Warburg Pincus Netherlands Private Equity VIII C.V. I, a limited partnership formed under the laws of the Netherlands ("WP VIII CV I"), and WP-WPVIII Investors, L.P., a Delaware limited partnership ("WP-WPVIII Investors"), and together with WP VIII and WP VIII CV I, the "WP VIII Funds").

F5 · ownership.nature: Warburg Pincus X, L.P., a Delaware limited partnership ("WP X GP"), is the general partner of each of the WP X O&G Funds. Warburg Pincus X GP L.P., a Delaware limited partnership ("WP X GP LP"), is the general partner of WP X GP. WPP GP LLC, a Delaware limited liability company ("WPP GP"), is the general partner of (a) WP X GP, and (b) WP-WPVIII Investors GP L.P., a Delaware limited partnership ("WP-WPVIII GP"), which, in turn, is the general partner of WP-WPVIII Investors. Warburg Pincus Partners, L.P., a Delaware limited partnership ("WP Partners"), is (i) the managing member of WPP GP, and (ii) the general partner of WP VIII and WP VIII CV I. Warburg Pincus Partners GP LLC, a Delaware limited liability company ("WP Partners GP"), is the general partner of WP Partners.

F6 · ownership.nature: Warburg Pincus & Co., a New York general partnership ("WP"), is the managing member of WP Partners GP. Warburg Pincus LLC, a New York limited liability company ("WP LLC"), is the manager of each of the WP X O&G Funds and the WP VIII Funds.

F7 · ownership.nature: Each of the WP X O&G Funds, the WP VIII Funds, WP-WPVIII GP, WP X GP, WP X GP LP, WPP GP, WP Partners, WP Partners GP, WP and WP LLC are collectively referred to herein as the "Warburg Pincus Entities." Charles R. Kaye and Joseph P. Landy are each Managing General Partners of WP and Managing Members and Co-Chief Executive Officers of WP LLC and may be deemed to control the Warburg Pincus Entities.

F8 · ownership.nature: By reason of the provisions of Rule 16a-1 of the Securities Exchange Act of 1934, as amended (the "Exchange Act"), (a) WP X GP, WP X GP LP, WPP GP, WP Partners, WP Partners GP, WP, WP LLC, and Messrs. Kaye and Landy and certain affiliates may be deemed to be beneficial owners of the 35,948,706 AMGP Common Shares (prior to the Conversion) and the 35,948,706 New AM Common Shares (after the Conversion) held collectively by the WP X O&G Funds, and (b) WPP GP, WP Partners, WP Partners GP, WP, WP LLC, and Messrs. Kaye and Landy and certain affiliates may be deemed to be beneficial owners of the 19,160,883 AMGP Common Shares (prior to the Conversion) and the 19,160,883 New AM Common Shares (after the Conversion) held collectively by the WP VIII Funds.

F9 · ownership.nature: (Continued from Footnote 8) The Warburg Pincus Entities, Messrs. Kaye and Landy and such affiliates disclaim beneficial ownership of such AMGP Common Shares and such New AM Common Shares except to the extent of their pecuniary interest therein. Each of WP X O&G, WP X GP, WP X GP LP, WPP GP, WP Partners, WP Partners GP, WP and WP LLC is a director-by-deputization solely for purposes of Section 16 of the Exchange Act.

F10 · ownership.nature: WP X GP and WP X GP LP each indirectly holds, and therefore may be deemed to be the beneficial owner of, the 35,948,706 AMGP Common Shares (prior to the Conversion) and the 35,948,706 New AM Common Shares (after the Conversion) directly held by the WP X O&G Funds.

SEC source: 0000899243-19-007792 · doc4.xml · nonDerivative · entry 5

Warburg Pincus Private Equity X O&G, L.P. · CIK 0001528258 · Director · 10% owner

Warburg Pincus X, L.P. · CIK 0001414561 · Director · 10% owner

Warburg Pincus X GP L.P. · CIK 0001414564 · Director · 10% owner

WPP GP LLC · CIK 0001621874 · Director · 10% owner

Warburg Pincus Partners, L.P. · CIK 0001621242 · Director · 10% owner

Warburg Pincus Partners GP LLC · CIK 0001621224 · Director · 10% owner

WARBURG PINCUS & CO. · CIK 0000929408 · Director · 10% owner

WARBURG PINCUS LLC · CIK 0001162870 · Director · 10% owner

KAYE CHARLES R · CIK 0001239318 · 10% owner

Landy Joseph P. · CIK 0001220638 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 34,834,296

F1 · kind: On March 12, 2019, in connection with the conversion of Antero Midstream GP LP ("AMGP") from a limited partnership to a corporation named Antero Midstream Corporation ("New AM") under the laws of the State of Delaware (the "Conversion"), each common share representing limited partnership interests of AMGP (the "AMGP Common Shares") was converted into one share of common stock of New AM ("New AM Common Shares").

F1 · price: On March 12, 2019, in connection with the conversion of Antero Midstream GP LP ("AMGP") from a limited partnership to a corporation named Antero Midstream Corporation ("New AM") under the laws of the State of Delaware (the "Conversion"), each common share representing limited partnership interests of AMGP (the "AMGP Common Shares") was converted into one share of common stock of New AM ("New AM Common Shares").

F2 · ownership.direct: This Form 4 is filed on behalf of Warburg Pincus Private Equity X O&G, L.P., a Delaware limited partnership ("WP X O&G" and, together with its affiliated partnership, Warburg Pincus X Partners, L.P., a Delaware limited partnership ("WP X Partners"), the "WP X O&G Funds"). As of March 12, 2019, prior to the Conversion, the Warburg Pincus Entities (as defined below) collectively owned 55,109,589 AMGP Common Shares, of which (a) 34,834,296 are owned by WP X O&G and 1,114,410 are owned by WP X Partners, for an aggregate total of 35,948,706 AMGP Common Shares owned by the WP X O&G Funds, and (b) 19,160,883 are owned by the WP VIII Funds (as defined below).

F3 · ownership.direct: (Continued from Footnote 2) As of March 12, 2019, after the Conversion, the Warburg Pincus Entities collectively own 55,109,589 New AM Common Shares, of which (i) 34,834,296 are owned by WP X O&G and 1,114,410 are owned by WP X Partners, for an aggregate total of 35,948,706 New AM Common Shares owned by the WP X O&G Funds, and (ii) 19,160,883 are owned by the WP VIII Funds.

F4 · ownership.direct: The Warburg Pincus funds are the WP X O&G Funds and Warburg Pincus Private Equity VIII, L.P., a Delaware limited partnership ("WP VIII"), and its two affiliated partnerships, Warburg Pincus Netherlands Private Equity VIII C.V. I, a limited partnership formed under the laws of the Netherlands ("WP VIII CV I"), and WP-WPVIII Investors, L.P., a Delaware limited partnership ("WP-WPVIII Investors"), and together with WP VIII and WP VIII CV I, the "WP VIII Funds").

F5 · ownership.direct: Warburg Pincus X, L.P., a Delaware limited partnership ("WP X GP"), is the general partner of each of the WP X O&G Funds. Warburg Pincus X GP L.P., a Delaware limited partnership ("WP X GP LP"), is the general partner of WP X GP. WPP GP LLC, a Delaware limited liability company ("WPP GP"), is the general partner of (a) WP X GP, and (b) WP-WPVIII Investors GP L.P., a Delaware limited partnership ("WP-WPVIII GP"), which, in turn, is the general partner of WP-WPVIII Investors. Warburg Pincus Partners, L.P., a Delaware limited partnership ("WP Partners"), is (i) the managing member of WPP GP, and (ii) the general partner of WP VIII and WP VIII CV I. Warburg Pincus Partners GP LLC, a Delaware limited liability company ("WP Partners GP"), is the general partner of WP Partners.

F6 · ownership.direct: Warburg Pincus & Co., a New York general partnership ("WP"), is the managing member of WP Partners GP. Warburg Pincus LLC, a New York limited liability company ("WP LLC"), is the manager of each of the WP X O&G Funds and the WP VIII Funds.

F7 · ownership.direct: Each of the WP X O&G Funds, the WP VIII Funds, WP-WPVIII GP, WP X GP, WP X GP LP, WPP GP, WP Partners, WP Partners GP, WP and WP LLC are collectively referred to herein as the "Warburg Pincus Entities." Charles R. Kaye and Joseph P. Landy are each Managing General Partners of WP and Managing Members and Co-Chief Executive Officers of WP LLC and may be deemed to control the Warburg Pincus Entities.

SEC source: 0000899243-19-007792 · doc4.xml · nonDerivative · entry 4

Warburg Pincus Private Equity X O&G, L.P. · CIK 0001528258 · Director · 10% owner

Warburg Pincus X, L.P. · CIK 0001414561 · Director · 10% owner

Warburg Pincus X GP L.P. · CIK 0001414564 · Director · 10% owner

WPP GP LLC · CIK 0001621874 · Director · 10% owner

Warburg Pincus Partners, L.P. · CIK 0001621242 · Director · 10% owner

Warburg Pincus Partners GP LLC · CIK 0001621224 · Director · 10% owner

WARBURG PINCUS & CO. · CIK 0000929408 · Director · 10% owner

WARBURG PINCUS LLC · CIK 0001162870 · Director · 10% owner

KAYE CHARLES R · CIK 0001239318 · 10% owner

Landy Joseph P. · CIK 0001220638 · 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: 0

F1 · kind: On March 12, 2019, in connection with the conversion of Antero Midstream GP LP ("AMGP") from a limited partnership to a corporation named Antero Midstream Corporation ("New AM") under the laws of the State of Delaware (the "Conversion"), each common share representing limited partnership interests of AMGP (the "AMGP Common Shares") was converted into one share of common stock of New AM ("New AM Common Shares").

F1 · price: On March 12, 2019, in connection with the conversion of Antero Midstream GP LP ("AMGP") from a limited partnership to a corporation named Antero Midstream Corporation ("New AM") under the laws of the State of Delaware (the "Conversion"), each common share representing limited partnership interests of AMGP (the "AMGP Common Shares") was converted into one share of common stock of New AM ("New AM Common Shares").

F2 · ownership.nature: This Form 4 is filed on behalf of Warburg Pincus Private Equity X O&G, L.P., a Delaware limited partnership ("WP X O&G" and, together with its affiliated partnership, Warburg Pincus X Partners, L.P., a Delaware limited partnership ("WP X Partners"), the "WP X O&G Funds"). As of March 12, 2019, prior to the Conversion, the Warburg Pincus Entities (as defined below) collectively owned 55,109,589 AMGP Common Shares, of which (a) 34,834,296 are owned by WP X O&G and 1,114,410 are owned by WP X Partners, for an aggregate total of 35,948,706 AMGP Common Shares owned by the WP X O&G Funds, and (b) 19,160,883 are owned by the WP VIII Funds (as defined below).

F3 · ownership.nature: (Continued from Footnote 2) As of March 12, 2019, after the Conversion, the Warburg Pincus Entities collectively own 55,109,589 New AM Common Shares, of which (i) 34,834,296 are owned by WP X O&G and 1,114,410 are owned by WP X Partners, for an aggregate total of 35,948,706 New AM Common Shares owned by the WP X O&G Funds, and (ii) 19,160,883 are owned by the WP VIII Funds.

F4 · ownership.nature: The Warburg Pincus funds are the WP X O&G Funds and Warburg Pincus Private Equity VIII, L.P., a Delaware limited partnership ("WP VIII"), and its two affiliated partnerships, Warburg Pincus Netherlands Private Equity VIII C.V. I, a limited partnership formed under the laws of the Netherlands ("WP VIII CV I"), and WP-WPVIII Investors, L.P., a Delaware limited partnership ("WP-WPVIII Investors"), and together with WP VIII and WP VIII CV I, the "WP VIII Funds").

F5 · ownership.nature: Warburg Pincus X, L.P., a Delaware limited partnership ("WP X GP"), is the general partner of each of the WP X O&G Funds. Warburg Pincus X GP L.P., a Delaware limited partnership ("WP X GP LP"), is the general partner of WP X GP. WPP GP LLC, a Delaware limited liability company ("WPP GP"), is the general partner of (a) WP X GP, and (b) WP-WPVIII Investors GP L.P., a Delaware limited partnership ("WP-WPVIII GP"), which, in turn, is the general partner of WP-WPVIII Investors. Warburg Pincus Partners, L.P., a Delaware limited partnership ("WP Partners"), is (i) the managing member of WPP GP, and (ii) the general partner of WP VIII and WP VIII CV I. Warburg Pincus Partners GP LLC, a Delaware limited liability company ("WP Partners GP"), is the general partner of WP Partners.

F6 · ownership.nature: Warburg Pincus & Co., a New York general partnership ("WP"), is the managing member of WP Partners GP. Warburg Pincus LLC, a New York limited liability company ("WP LLC"), is the manager of each of the WP X O&G Funds and the WP VIII Funds.

F7 · ownership.nature: Each of the WP X O&G Funds, the WP VIII Funds, WP-WPVIII GP, WP X GP, WP X GP LP, WPP GP, WP Partners, WP Partners GP, WP and WP LLC are collectively referred to herein as the "Warburg Pincus Entities." Charles R. Kaye and Joseph P. Landy are each Managing General Partners of WP and Managing Members and Co-Chief Executive Officers of WP LLC and may be deemed to control the Warburg Pincus Entities.

F8 · ownership.nature: By reason of the provisions of Rule 16a-1 of the Securities Exchange Act of 1934, as amended (the "Exchange Act"), (a) WP X GP, WP X GP LP, WPP GP, WP Partners, WP Partners GP, WP, WP LLC, and Messrs. Kaye and Landy and certain affiliates may be deemed to be beneficial owners of the 35,948,706 AMGP Common Shares (prior to the Conversion) and the 35,948,706 New AM Common Shares (after the Conversion) held collectively by the WP X O&G Funds, and (b) WPP GP, WP Partners, WP Partners GP, WP, WP LLC, and Messrs. Kaye and Landy and certain affiliates may be deemed to be beneficial owners of the 19,160,883 AMGP Common Shares (prior to the Conversion) and the 19,160,883 New AM Common Shares (after the Conversion) held collectively by the WP VIII Funds.

F9 · ownership.nature: (Continued from Footnote 8) The Warburg Pincus Entities, Messrs. Kaye and Landy and such affiliates disclaim beneficial ownership of such AMGP Common Shares and such New AM Common Shares except to the extent of their pecuniary interest therein. Each of WP X O&G, WP X GP, WP X GP LP, WPP GP, WP Partners, WP Partners GP, WP and WP LLC is a director-by-deputization solely for purposes of Section 16 of the Exchange Act.

F10 · ownership.nature: WP X GP and WP X GP LP each indirectly holds, and therefore may be deemed to be the beneficial owner of, the 35,948,706 AMGP Common Shares (prior to the Conversion) and the 35,948,706 New AM Common Shares (after the Conversion) directly held by the WP X O&G Funds.

F11 · ownership.nature: WPP GP indirectly holds, and therefore may be deemed to be the beneficial owner of, the 36,002,529 AMGP Common Shares (prior to the Conversion) and the 36,002,529 New AM Common Shares (after the conversion) directly held by WP-WPVIII Investors and the WP X O&G Funds.

F12 · ownership.nature: WP Partners, WP Partners GP, WP and WP LLC each indirectly holds, and therefore may be deemed to be the beneficial owner of, the 55,109,589 AMGP Common Shares (prior to the Conversion) and the 55,109,589 New AM Common Shares directly held by the WP VIII Funds and the WP X O&G Funds.

SEC source: 0000899243-19-007792 · doc4.xml · nonDerivative · entry 3

Warburg Pincus Private Equity X O&G, L.P. · CIK 0001528258 · Director · 10% owner

Warburg Pincus X, L.P. · CIK 0001414561 · Director · 10% owner

Warburg Pincus X GP L.P. · CIK 0001414564 · Director · 10% owner

WPP GP LLC · CIK 0001621874 · Director · 10% owner

Warburg Pincus Partners, L.P. · CIK 0001621242 · Director · 10% owner

Warburg Pincus Partners GP LLC · CIK 0001621224 · Director · 10% owner

WARBURG PINCUS & CO. · CIK 0000929408 · Director · 10% owner

WARBURG PINCUS LLC · CIK 0001162870 · Director · 10% owner

KAYE CHARLES R · CIK 0001239318 · 10% owner

Landy Joseph P. · CIK 0001220638 · 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: 0

F1 · kind: On March 12, 2019, in connection with the conversion of Antero Midstream GP LP ("AMGP") from a limited partnership to a corporation named Antero Midstream Corporation ("New AM") under the laws of the State of Delaware (the "Conversion"), each common share representing limited partnership interests of AMGP (the "AMGP Common Shares") was converted into one share of common stock of New AM ("New AM Common Shares").

F1 · price: On March 12, 2019, in connection with the conversion of Antero Midstream GP LP ("AMGP") from a limited partnership to a corporation named Antero Midstream Corporation ("New AM") under the laws of the State of Delaware (the "Conversion"), each common share representing limited partnership interests of AMGP (the "AMGP Common Shares") was converted into one share of common stock of New AM ("New AM Common Shares").

F2 · ownership.nature: This Form 4 is filed on behalf of Warburg Pincus Private Equity X O&G, L.P., a Delaware limited partnership ("WP X O&G" and, together with its affiliated partnership, Warburg Pincus X Partners, L.P., a Delaware limited partnership ("WP X Partners"), the "WP X O&G Funds"). As of March 12, 2019, prior to the Conversion, the Warburg Pincus Entities (as defined below) collectively owned 55,109,589 AMGP Common Shares, of which (a) 34,834,296 are owned by WP X O&G and 1,114,410 are owned by WP X Partners, for an aggregate total of 35,948,706 AMGP Common Shares owned by the WP X O&G Funds, and (b) 19,160,883 are owned by the WP VIII Funds (as defined below).

F3 · ownership.nature: (Continued from Footnote 2) As of March 12, 2019, after the Conversion, the Warburg Pincus Entities collectively own 55,109,589 New AM Common Shares, of which (i) 34,834,296 are owned by WP X O&G and 1,114,410 are owned by WP X Partners, for an aggregate total of 35,948,706 New AM Common Shares owned by the WP X O&G Funds, and (ii) 19,160,883 are owned by the WP VIII Funds.

F4 · ownership.nature: The Warburg Pincus funds are the WP X O&G Funds and Warburg Pincus Private Equity VIII, L.P., a Delaware limited partnership ("WP VIII"), and its two affiliated partnerships, Warburg Pincus Netherlands Private Equity VIII C.V. I, a limited partnership formed under the laws of the Netherlands ("WP VIII CV I"), and WP-WPVIII Investors, L.P., a Delaware limited partnership ("WP-WPVIII Investors"), and together with WP VIII and WP VIII CV I, the "WP VIII Funds").

F5 · ownership.nature: Warburg Pincus X, L.P., a Delaware limited partnership ("WP X GP"), is the general partner of each of the WP X O&G Funds. Warburg Pincus X GP L.P., a Delaware limited partnership ("WP X GP LP"), is the general partner of WP X GP. WPP GP LLC, a Delaware limited liability company ("WPP GP"), is the general partner of (a) WP X GP, and (b) WP-WPVIII Investors GP L.P., a Delaware limited partnership ("WP-WPVIII GP"), which, in turn, is the general partner of WP-WPVIII Investors. Warburg Pincus Partners, L.P., a Delaware limited partnership ("WP Partners"), is (i) the managing member of WPP GP, and (ii) the general partner of WP VIII and WP VIII CV I. Warburg Pincus Partners GP LLC, a Delaware limited liability company ("WP Partners GP"), is the general partner of WP Partners.

F6 · ownership.nature: Warburg Pincus & Co., a New York general partnership ("WP"), is the managing member of WP Partners GP. Warburg Pincus LLC, a New York limited liability company ("WP LLC"), is the manager of each of the WP X O&G Funds and the WP VIII Funds.

F7 · ownership.nature: Each of the WP X O&G Funds, the WP VIII Funds, WP-WPVIII GP, WP X GP, WP X GP LP, WPP GP, WP Partners, WP Partners GP, WP and WP LLC are collectively referred to herein as the "Warburg Pincus Entities." Charles R. Kaye and Joseph P. Landy are each Managing General Partners of WP and Managing Members and Co-Chief Executive Officers of WP LLC and may be deemed to control the Warburg Pincus Entities.

F8 · ownership.nature: By reason of the provisions of Rule 16a-1 of the Securities Exchange Act of 1934, as amended (the "Exchange Act"), (a) WP X GP, WP X GP LP, WPP GP, WP Partners, WP Partners GP, WP, WP LLC, and Messrs. Kaye and Landy and certain affiliates may be deemed to be beneficial owners of the 35,948,706 AMGP Common Shares (prior to the Conversion) and the 35,948,706 New AM Common Shares (after the Conversion) held collectively by the WP X O&G Funds, and (b) WPP GP, WP Partners, WP Partners GP, WP, WP LLC, and Messrs. Kaye and Landy and certain affiliates may be deemed to be beneficial owners of the 19,160,883 AMGP Common Shares (prior to the Conversion) and the 19,160,883 New AM Common Shares (after the Conversion) held collectively by the WP VIII Funds.

F9 · ownership.nature: (Continued from Footnote 8) The Warburg Pincus Entities, Messrs. Kaye and Landy and such affiliates disclaim beneficial ownership of such AMGP Common Shares and such New AM Common Shares except to the extent of their pecuniary interest therein. Each of WP X O&G, WP X GP, WP X GP LP, WPP GP, WP Partners, WP Partners GP, WP and WP LLC is a director-by-deputization solely for purposes of Section 16 of the Exchange Act.

F10 · ownership.nature: WP X GP and WP X GP LP each indirectly holds, and therefore may be deemed to be the beneficial owner of, the 35,948,706 AMGP Common Shares (prior to the Conversion) and the 35,948,706 New AM Common Shares (after the Conversion) directly held by the WP X O&G Funds.

F11 · ownership.nature: WPP GP indirectly holds, and therefore may be deemed to be the beneficial owner of, the 36,002,529 AMGP Common Shares (prior to the Conversion) and the 36,002,529 New AM Common Shares (after the conversion) directly held by WP-WPVIII Investors and the WP X O&G Funds.

SEC source: 0000899243-19-007792 · doc4.xml · nonDerivative · entry 2

Warburg Pincus Private Equity X O&G, L.P. · CIK 0001528258 · Director · 10% owner

Warburg Pincus X, L.P. · CIK 0001414561 · Director · 10% owner

Warburg Pincus X GP L.P. · CIK 0001414564 · Director · 10% owner

WPP GP LLC · CIK 0001621874 · Director · 10% owner

Warburg Pincus Partners, L.P. · CIK 0001621242 · Director · 10% owner

Warburg Pincus Partners GP LLC · CIK 0001621224 · Director · 10% owner

WARBURG PINCUS & CO. · CIK 0000929408 · Director · 10% owner

WARBURG PINCUS LLC · CIK 0001162870 · Director · 10% owner

KAYE CHARLES R · CIK 0001239318 · 10% owner

Landy Joseph P. · CIK 0001220638 · 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: 0

F1 · kind: On March 12, 2019, in connection with the conversion of Antero Midstream GP LP ("AMGP") from a limited partnership to a corporation named Antero Midstream Corporation ("New AM") under the laws of the State of Delaware (the "Conversion"), each common share representing limited partnership interests of AMGP (the "AMGP Common Shares") was converted into one share of common stock of New AM ("New AM Common Shares").

F1 · price: On March 12, 2019, in connection with the conversion of Antero Midstream GP LP ("AMGP") from a limited partnership to a corporation named Antero Midstream Corporation ("New AM") under the laws of the State of Delaware (the "Conversion"), each common share representing limited partnership interests of AMGP (the "AMGP Common Shares") was converted into one share of common stock of New AM ("New AM Common Shares").

F2 · ownership.nature: This Form 4 is filed on behalf of Warburg Pincus Private Equity X O&G, L.P., a Delaware limited partnership ("WP X O&G" and, together with its affiliated partnership, Warburg Pincus X Partners, L.P., a Delaware limited partnership ("WP X Partners"), the "WP X O&G Funds"). As of March 12, 2019, prior to the Conversion, the Warburg Pincus Entities (as defined below) collectively owned 55,109,589 AMGP Common Shares, of which (a) 34,834,296 are owned by WP X O&G and 1,114,410 are owned by WP X Partners, for an aggregate total of 35,948,706 AMGP Common Shares owned by the WP X O&G Funds, and (b) 19,160,883 are owned by the WP VIII Funds (as defined below).

F3 · ownership.nature: (Continued from Footnote 2) As of March 12, 2019, after the Conversion, the Warburg Pincus Entities collectively own 55,109,589 New AM Common Shares, of which (i) 34,834,296 are owned by WP X O&G and 1,114,410 are owned by WP X Partners, for an aggregate total of 35,948,706 New AM Common Shares owned by the WP X O&G Funds, and (ii) 19,160,883 are owned by the WP VIII Funds.

F4 · ownership.nature: The Warburg Pincus funds are the WP X O&G Funds and Warburg Pincus Private Equity VIII, L.P., a Delaware limited partnership ("WP VIII"), and its two affiliated partnerships, Warburg Pincus Netherlands Private Equity VIII C.V. I, a limited partnership formed under the laws of the Netherlands ("WP VIII CV I"), and WP-WPVIII Investors, L.P., a Delaware limited partnership ("WP-WPVIII Investors"), and together with WP VIII and WP VIII CV I, the "WP VIII Funds").

F5 · ownership.nature: Warburg Pincus X, L.P., a Delaware limited partnership ("WP X GP"), is the general partner of each of the WP X O&G Funds. Warburg Pincus X GP L.P., a Delaware limited partnership ("WP X GP LP"), is the general partner of WP X GP. WPP GP LLC, a Delaware limited liability company ("WPP GP"), is the general partner of (a) WP X GP, and (b) WP-WPVIII Investors GP L.P., a Delaware limited partnership ("WP-WPVIII GP"), which, in turn, is the general partner of WP-WPVIII Investors. Warburg Pincus Partners, L.P., a Delaware limited partnership ("WP Partners"), is (i) the managing member of WPP GP, and (ii) the general partner of WP VIII and WP VIII CV I. Warburg Pincus Partners GP LLC, a Delaware limited liability company ("WP Partners GP"), is the general partner of WP Partners.

F6 · ownership.nature: Warburg Pincus & Co., a New York general partnership ("WP"), is the managing member of WP Partners GP. Warburg Pincus LLC, a New York limited liability company ("WP LLC"), is the manager of each of the WP X O&G Funds and the WP VIII Funds.

F7 · ownership.nature: Each of the WP X O&G Funds, the WP VIII Funds, WP-WPVIII GP, WP X GP, WP X GP LP, WPP GP, WP Partners, WP Partners GP, WP and WP LLC are collectively referred to herein as the "Warburg Pincus Entities." Charles R. Kaye and Joseph P. Landy are each Managing General Partners of WP and Managing Members and Co-Chief Executive Officers of WP LLC and may be deemed to control the Warburg Pincus Entities.

F8 · ownership.nature: By reason of the provisions of Rule 16a-1 of the Securities Exchange Act of 1934, as amended (the "Exchange Act"), (a) WP X GP, WP X GP LP, WPP GP, WP Partners, WP Partners GP, WP, WP LLC, and Messrs. Kaye and Landy and certain affiliates may be deemed to be beneficial owners of the 35,948,706 AMGP Common Shares (prior to the Conversion) and the 35,948,706 New AM Common Shares (after the Conversion) held collectively by the WP X O&G Funds, and (b) WPP GP, WP Partners, WP Partners GP, WP, WP LLC, and Messrs. Kaye and Landy and certain affiliates may be deemed to be beneficial owners of the 19,160,883 AMGP Common Shares (prior to the Conversion) and the 19,160,883 New AM Common Shares (after the Conversion) held collectively by the WP VIII Funds.

F9 · ownership.nature: (Continued from Footnote 8) The Warburg Pincus Entities, Messrs. Kaye and Landy and such affiliates disclaim beneficial ownership of such AMGP Common Shares and such New AM Common Shares except to the extent of their pecuniary interest therein. Each of WP X O&G, WP X GP, WP X GP LP, WPP GP, WP Partners, WP Partners GP, WP and WP LLC is a director-by-deputization solely for purposes of Section 16 of the Exchange Act.

F10 · ownership.nature: WP X GP and WP X GP LP each indirectly holds, and therefore may be deemed to be the beneficial owner of, the 35,948,706 AMGP Common Shares (prior to the Conversion) and the 35,948,706 New AM Common Shares (after the Conversion) directly held by the WP X O&G Funds.

SEC source: 0000899243-19-007792 · doc4.xml · nonDerivative · entry 1

Warburg Pincus Private Equity X O&G, L.P. · CIK 0001528258 · Director · 10% owner

Warburg Pincus X, L.P. · CIK 0001414561 · Director · 10% owner

Warburg Pincus X GP L.P. · CIK 0001414564 · Director · 10% owner

WPP GP LLC · CIK 0001621874 · Director · 10% owner

Warburg Pincus Partners, L.P. · CIK 0001621242 · Director · 10% owner

Warburg Pincus Partners GP LLC · CIK 0001621224 · Director · 10% owner

WARBURG PINCUS & CO. · CIK 0000929408 · Director · 10% owner

WARBURG PINCUS LLC · CIK 0001162870 · Director · 10% owner

KAYE CHARLES R · CIK 0001239318 · 10% owner

Landy Joseph P. · CIK 0001220638 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

F1 · kind: On March 12, 2019, in connection with the conversion of Antero Midstream GP LP ("AMGP") from a limited partnership to a corporation named Antero Midstream Corporation ("New AM") under the laws of the State of Delaware (the "Conversion"), each common share representing limited partnership interests of AMGP (the "AMGP Common Shares") was converted into one share of common stock of New AM ("New AM Common Shares").

F1 · price: On March 12, 2019, in connection with the conversion of Antero Midstream GP LP ("AMGP") from a limited partnership to a corporation named Antero Midstream Corporation ("New AM") under the laws of the State of Delaware (the "Conversion"), each common share representing limited partnership interests of AMGP (the "AMGP Common Shares") was converted into one share of common stock of New AM ("New AM Common Shares").

F2 · ownership.direct: This Form 4 is filed on behalf of Warburg Pincus Private Equity X O&G, L.P., a Delaware limited partnership ("WP X O&G" and, together with its affiliated partnership, Warburg Pincus X Partners, L.P., a Delaware limited partnership ("WP X Partners"), the "WP X O&G Funds"). As of March 12, 2019, prior to the Conversion, the Warburg Pincus Entities (as defined below) collectively owned 55,109,589 AMGP Common Shares, of which (a) 34,834,296 are owned by WP X O&G and 1,114,410 are owned by WP X Partners, for an aggregate total of 35,948,706 AMGP Common Shares owned by the WP X O&G Funds, and (b) 19,160,883 are owned by the WP VIII Funds (as defined below).

F3 · ownership.direct: (Continued from Footnote 2) As of March 12, 2019, after the Conversion, the Warburg Pincus Entities collectively own 55,109,589 New AM Common Shares, of which (i) 34,834,296 are owned by WP X O&G and 1,114,410 are owned by WP X Partners, for an aggregate total of 35,948,706 New AM Common Shares owned by the WP X O&G Funds, and (ii) 19,160,883 are owned by the WP VIII Funds.

F4 · ownership.direct: The Warburg Pincus funds are the WP X O&G Funds and Warburg Pincus Private Equity VIII, L.P., a Delaware limited partnership ("WP VIII"), and its two affiliated partnerships, Warburg Pincus Netherlands Private Equity VIII C.V. I, a limited partnership formed under the laws of the Netherlands ("WP VIII CV I"), and WP-WPVIII Investors, L.P., a Delaware limited partnership ("WP-WPVIII Investors"), and together with WP VIII and WP VIII CV I, the "WP VIII Funds").

F5 · ownership.direct: Warburg Pincus X, L.P., a Delaware limited partnership ("WP X GP"), is the general partner of each of the WP X O&G Funds. Warburg Pincus X GP L.P., a Delaware limited partnership ("WP X GP LP"), is the general partner of WP X GP. WPP GP LLC, a Delaware limited liability company ("WPP GP"), is the general partner of (a) WP X GP, and (b) WP-WPVIII Investors GP L.P., a Delaware limited partnership ("WP-WPVIII GP"), which, in turn, is the general partner of WP-WPVIII Investors. Warburg Pincus Partners, L.P., a Delaware limited partnership ("WP Partners"), is (i) the managing member of WPP GP, and (ii) the general partner of WP VIII and WP VIII CV I. Warburg Pincus Partners GP LLC, a Delaware limited liability company ("WP Partners GP"), is the general partner of WP Partners.

F6 · ownership.direct: Warburg Pincus & Co., a New York general partnership ("WP"), is the managing member of WP Partners GP. Warburg Pincus LLC, a New York limited liability company ("WP LLC"), is the manager of each of the WP X O&G Funds and the WP VIII Funds.

F7 · ownership.direct: Each of the WP X O&G Funds, the WP VIII Funds, WP-WPVIII GP, WP X GP, WP X GP LP, WPP GP, WP Partners, WP Partners GP, WP and WP LLC are collectively referred to herein as the "Warburg Pincus Entities." Charles R. Kaye and Joseph P. Landy are each Managing General Partners of WP and Managing Members and Co-Chief Executive Officers of WP LLC and may be deemed to control the Warburg Pincus Entities.

SEC source: 0001104659-19-012135 · a4.xml · nonDerivative · entry 4

WARBURG PINCUS & CO. · CIK 0000929408 · Director

WARBURG PINCUS LLC · CIK 0001162870 · Director

Warburg Pincus Partners, L.P. · CIK 0001621242 · Director

Warburg Pincus Partners GP LLC · CIK 0001621224 · Director

Warburg Pincus Private Equity VIII, L.P. · CIK 0001157334 · Director

Warburg Pincus International Partners, L.P. · CIK 0001299643 · Director

KAYE CHARLES R · CIK 0001239318 · Director

Landy Joseph P. · CIK 0001220638 · Director

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 6,074,222

F6 · ownership.nature: Joseph P. Landy is a Managing General Partner of WP and a Managing Member and Co-Chief Executive Officer of WP LLC. Pursuant to Rule 16a-1 of the Exchange Act, Mr. Landy may be deemed to be the beneficial owner of any securities reported herein that may be deemed to be beneficially owned by the WP VIII Funds and the WPIP Funds.

F7 · ownership.nature: Pursuant to Rule 16a-1(a)(4) of the Exchange Act, each of WP VIII, WPIP, WP Partners, WP Partners GP, WP, WP LLC, Mr. Kaye and Mr. Landy herein state that this filing shall not be deemed an admission that he or it is the beneficial owner of any such Common Shares covered herein. Each of WP VIII, WPIP, WP Partners, WP Partners GP, WP, WP LLC, Mr. Kaye and Mr. Landy disclaims beneficial ownership of such Common Shares, except to the extent of its or his pecuniary interest in such Common Shares. This Form 4 shall not be deemed an admission that any reporting person or any other person referred to herein is a beneficial owner of any securities of the Issuer for purposes of Section 16 of the Exchange Act, or for any other purpose or that any reporting person or other person has an obligation to file this Form 4.

SEC source: 0001104659-19-012135 · a4.xml · nonDerivative · entry 3

WARBURG PINCUS & CO. · CIK 0000929408 · Director

WARBURG PINCUS LLC · CIK 0001162870 · Director

Warburg Pincus Partners, L.P. · CIK 0001621242 · Director

Warburg Pincus Partners GP LLC · CIK 0001621224 · Director

Warburg Pincus Private Equity VIII, L.P. · CIK 0001157334 · Director

Warburg Pincus International Partners, L.P. · CIK 0001299643 · Director

KAYE CHARLES R · CIK 0001239318 · Director

Landy Joseph P. · CIK 0001220638 · Director

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 6,074,222

F3 · ownership.nature: Reflects the aggregate number of Common Shares directly owned by the WP VIII Funds and the WPIP Funds.

F4 · ownership.nature: WP-WPVIII Investors GP L.P., a Delaware limited partnership ("WP VIII Investors GP"), is the general partner of WP VIII Investors. WP-WPIP Investors GP L.P., a Delaware limited partnership ("WPIP Investors GP"), is the general partner of WPIP Investors. WPP GP LLC, a Delaware limited liability company ("WPP GP"), is the general partner of each of WP VIII Investors GP and WPIP Investors GP. Warburg Pincus Partners, L.P., a Delaware limited partnership ("WP Partners"), is (i) the managing member of WPP GP, and (ii) the general partner of WP VIII, WP VIII Netherlands, WPIP, and WPIP Netherlands. Warburg Pincus Partners GP LLC, a Delaware limited liability company ("WP Partners GP"), is the general partner of WP Partners. Warburg Pincus & Co., a New York general partnership ("WP"), is the managing member of WP Partners GP. The WP VIII Funds and WPIP Funds are managed by Warburg Pincus LLC, a New York limited liability company ("WP LLC").

F5 · ownership.nature: Charles R. Kaye is a Managing General Partner of WP and a Managing Member and Co-Chief Executive Officer of WP LLC. Pursuant to Rule 16a-1 of the Securities and Exchange Act of 1934, as amended (the "Exchange Act"), WP Partners, WP Partners GP, WP, WP LLC and Mr. Kaye may be deemed to be the beneficial owners of any securities reported herein that may be deemed to be beneficially owned by the WP VIII Funds and the WPIP Funds.

F7 · ownership.nature: Pursuant to Rule 16a-1(a)(4) of the Exchange Act, each of WP VIII, WPIP, WP Partners, WP Partners GP, WP, WP LLC, Mr. Kaye and Mr. Landy herein state that this filing shall not be deemed an admission that he or it is the beneficial owner of any such Common Shares covered herein. Each of WP VIII, WPIP, WP Partners, WP Partners GP, WP, WP LLC, Mr. Kaye and Mr. Landy disclaims beneficial ownership of such Common Shares, except to the extent of its or his pecuniary interest in such Common Shares. This Form 4 shall not be deemed an admission that any reporting person or any other person referred to herein is a beneficial owner of any securities of the Issuer for purposes of Section 16 of the Exchange Act, or for any other purpose or that any reporting person or other person has an obligation to file this Form 4.

SEC source: 0001104659-19-012135 · a4.xml · nonDerivative · entry 2

WARBURG PINCUS & CO. · CIK 0000929408 · Director

WARBURG PINCUS LLC · CIK 0001162870 · Director

Warburg Pincus Partners, L.P. · CIK 0001621242 · Director

Warburg Pincus Partners GP LLC · CIK 0001621224 · Director

Warburg Pincus Private Equity VIII, L.P. · CIK 0001157334 · Director

Warburg Pincus International Partners, L.P. · CIK 0001299643 · Director

KAYE CHARLES R · CIK 0001239318 · Director

Landy Joseph P. · CIK 0001220638 · Director

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 2,911,137

F2 · ownership.direct: Reflects the number of Common Shares directly owned by Warburg Pincus International Partners, L.P., a Delaware limited partnership ("WPIP"). This number does not include the number of Common Shares held by Warburg Pincus Netherlands International Partners I C.V., a company incorporated under the laws of the Netherlands ("WPIP Netherlands"), and WP-WPIP Investors L.P., a Delaware limited partnership ("WPIP Investors"), which are limited partnerships affiliated with WPIP (WPIP Netherlands and WPIP Investors, together with WPIP, the "WPIP Funds"). WPIP Netherlands and WPIP Investors sold 550,000 Common Shares and 20,350 Common Shares, respectively, subsequent to which they own 121,488 Common Shares and 4,491 Common Shares, respectively.

SEC source: 0001104659-19-012135 · a4.xml · nonDerivative · entry 1

WARBURG PINCUS & CO. · CIK 0000929408 · Director

WARBURG PINCUS LLC · CIK 0001162870 · Director

Warburg Pincus Partners, L.P. · CIK 0001621242 · Director

Warburg Pincus Partners GP LLC · CIK 0001621224 · Director

Warburg Pincus Private Equity VIII, L.P. · CIK 0001157334 · Director

Warburg Pincus International Partners, L.P. · CIK 0001299643 · Director

KAYE CHARLES R · CIK 0001239318 · Director

Landy Joseph P. · CIK 0001220638 · Director

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 2,943,178

F1 · ownership.direct: Reflects the number of Common Shares directly owned by Warburg Pincus Private Equity VIII, L.P., a Delaware limited partnership ("WP VIII"). This number does not include the number of Common Shares held by Warburg Pincus Netherlands Private Equity VIII C.V. I, a company incorporated under the laws of the Netherlands ("WP VIII Netherlands") and WP-WPVIII Investors, L.P., a Delaware limited partnership ("WP VIII Investors"), which are limited partnerships affiliated with WP VIII (WP VIII Netherlands and WP VIII Investors, together with WP VIII, the "WP VIII Funds"). WP VIII Netherlands and WP VIII Investors sold 386,236 Common Shares and 38,624 Common Shares, respectively, subsequent to which they own 85,782 Common Shares and 8,146 Common Shares, respectively.

SEC source: 0001104659-19-010922 · a4.xml · nonDerivative · entry 2

Warburg Pincus Private Equity X O&G, L.P. · CIK 0001528258 · Director

Warburg Pincus X Partners, L.P. · CIK 0001451560 · Director

Warburg Pincus X, L.P. · CIK 0001414561 · Director

Warburg Pincus X GP L.P. · CIK 0001414564 · Director

WPP GP LLC · CIK 0001621874 · Director

Warburg Pincus Partners, L.P. · CIK 0001621242 · Director

Warburg Pincus Partners GP LLC · CIK 0001621224 · Director

WARBURG PINCUS & CO. · CIK 0000929408 · Director

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnote

Disclosed balance after: 499,830

F1 · kind: Effective February 26, 2019, WP X Partners (as defined below) and WP X O&G (as defined below) distributed an aggregate total of 17,514,873 shares of common stock, par value $0.01 per share ("Common Stock"), of Antero Resources Corporation (the "Issuer") to their partners on a pro rata basis in accordance with their respective ownership interests as determined in accordance with the applicable limited partnership agreements of such entities (the "Distribution"), with no consideration being paid in connection therewith.

F1 · price: Effective February 26, 2019, WP X Partners (as defined below) and WP X O&G (as defined below) distributed an aggregate total of 17,514,873 shares of common stock, par value $0.01 per share ("Common Stock"), of Antero Resources Corporation (the "Issuer") to their partners on a pro rata basis in accordance with their respective ownership interests as determined in accordance with the applicable limited partnership agreements of such entities (the "Distribution"), with no consideration being paid in connection therewith.

F2 · balance_after: This Form 4 is filed on behalf of (i) Warburg Pincus X Partners, L.P., a Delaware limited partnership ("WP X Partners"); and (ii) Warburg Pincus Private Equity X O&G, L.P., a Delaware limited partnership ("WP X O&G").

F3 · balance_after: Warburg Pincus X, L.P., a Delaware limited partnership ("WP X GP"), is the general partner of WP X Partners and WP X O&G. Warburg Pincus X GP L.P., a Delaware limited partnership ("WP X GP LP"), is the general partner of WP X GP. WPP GP LLC, a Delaware limited liability company ("WPP GP"), is the general partner of WP X GP LP. Warburg Pincus Partners, L.P., a Delaware limited partnership ("WP Partners"), is the managing member of WPP GP. Warburg Pincus Partners GP LLC, a Delaware limited liability company ("WP Partners GP"), is the general partner of WP Partners.

F4 · balance_after: Warburg Pincus & Co., a New York general partnership ("WP"), is the managing member of WP Partners GP.

F5 · balance_after: By reason of the provisions of Rule 16a-1 of the Securities Exchange Act of 1934, as amended (the "Exchange Act"), the Warburg Pincus Reporting Persons and certain affiliates may be deemed to be beneficial owners of 499,830 shares of Common Stock of the Issuer held by WP X Partners and 15,594,358 shares of Common Stock of the Issuer held by WP X O&G. The Warburg Pincus Reporting Persons and such affiliates disclaim beneficial ownership of such shares of Common Stock of the Issuer except to the extent of their direct pecuniary interest therein. WP Partners, WP Partners GP, and WP are directors-by-deputization solely for purposes of Section 16 of the Exchange Act. Information with respect to each of the Warburg Pincus Reporting Persons is given solely by such Warburg Pincus Reporting Person, and no Warburg Pincus Reporting Person has responsibility for the accuracy or completeness of information supplied by another Warburg Pincus Reporting Person.

F6 · ownership.nature: Common Stock of the Issuer is held directly by WP X Partners.

SEC source: 0001104659-19-010922 · a4.xml · nonDerivative · entry 1

Warburg Pincus Private Equity X O&G, L.P. · CIK 0001528258 · Director

Warburg Pincus X Partners, L.P. · CIK 0001451560 · Director

Warburg Pincus X, L.P. · CIK 0001414561 · Director

Warburg Pincus X GP L.P. · CIK 0001414564 · Director

WPP GP LLC · CIK 0001621874 · Director

Warburg Pincus Partners, L.P. · CIK 0001621242 · Director

Warburg Pincus Partners GP LLC · CIK 0001621224 · Director

WARBURG PINCUS & CO. · CIK 0000929408 · Director

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 15,594,358

F1 · kind: Effective February 26, 2019, WP X Partners (as defined below) and WP X O&G (as defined below) distributed an aggregate total of 17,514,873 shares of common stock, par value $0.01 per share ("Common Stock"), of Antero Resources Corporation (the "Issuer") to their partners on a pro rata basis in accordance with their respective ownership interests as determined in accordance with the applicable limited partnership agreements of such entities (the "Distribution"), with no consideration being paid in connection therewith.

F1 · price: Effective February 26, 2019, WP X Partners (as defined below) and WP X O&G (as defined below) distributed an aggregate total of 17,514,873 shares of common stock, par value $0.01 per share ("Common Stock"), of Antero Resources Corporation (the "Issuer") to their partners on a pro rata basis in accordance with their respective ownership interests as determined in accordance with the applicable limited partnership agreements of such entities (the "Distribution"), with no consideration being paid in connection therewith.

F2 · balance_after: This Form 4 is filed on behalf of (i) Warburg Pincus X Partners, L.P., a Delaware limited partnership ("WP X Partners"); and (ii) Warburg Pincus Private Equity X O&G, L.P., a Delaware limited partnership ("WP X O&G").

F3 · balance_after: Warburg Pincus X, L.P., a Delaware limited partnership ("WP X GP"), is the general partner of WP X Partners and WP X O&G. Warburg Pincus X GP L.P., a Delaware limited partnership ("WP X GP LP"), is the general partner of WP X GP. WPP GP LLC, a Delaware limited liability company ("WPP GP"), is the general partner of WP X GP LP. Warburg Pincus Partners, L.P., a Delaware limited partnership ("WP Partners"), is the managing member of WPP GP. Warburg Pincus Partners GP LLC, a Delaware limited liability company ("WP Partners GP"), is the general partner of WP Partners.

F4 · balance_after: Warburg Pincus & Co., a New York general partnership ("WP"), is the managing member of WP Partners GP.

F5 · balance_after: By reason of the provisions of Rule 16a-1 of the Securities Exchange Act of 1934, as amended (the "Exchange Act"), the Warburg Pincus Reporting Persons and certain affiliates may be deemed to be beneficial owners of 499,830 shares of Common Stock of the Issuer held by WP X Partners and 15,594,358 shares of Common Stock of the Issuer held by WP X O&G. The Warburg Pincus Reporting Persons and such affiliates disclaim beneficial ownership of such shares of Common Stock of the Issuer except to the extent of their direct pecuniary interest therein. WP Partners, WP Partners GP, and WP are directors-by-deputization solely for purposes of Section 16 of the Exchange Act. Information with respect to each of the Warburg Pincus Reporting Persons is given solely by such Warburg Pincus Reporting Person, and no Warburg Pincus Reporting Person has responsibility for the accuracy or completeness of information supplied by another Warburg Pincus Reporting Person.

SEC source: 0001104659-19-012155 · a4a.xml · nonDerivative · entry 2

Warburg Pincus Private Equity X O&G, L.P. · CIK 0001528258 · Director

Warburg Pincus X Partners, L.P. · CIK 0001451560 · Director

Warburg Pincus X, L.P. · CIK 0001414561 · Director

Warburg Pincus X GP L.P. · CIK 0001414564 · Director

WPP GP LLC · CIK 0001621874 · Director

Warburg Pincus Partners, L.P. · CIK 0001621242 · Director

Warburg Pincus Partners GP LLC · CIK 0001621224 · Director

WARBURG PINCUS & CO. · CIK 0000929408 · Director

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnote

Disclosed balance after: 499,830

F1 · kind: Effective February 26, 2019, WP X Partners (as defined below) and WP X O&G (as defined below) distributed an aggregate total of 17,514,871 shares of common stock, par value $0.01 per share ("Common Stock"), of Antero Resources Corporation (the "Issuer") to their partners on a pro rata basis in accordance with their respective ownership interests as determined in accordance with the applicable limited partnership agreements of such entities (the "Distribution"), with no consideration being paid in connection therewith.

F1 · price: Effective February 26, 2019, WP X Partners (as defined below) and WP X O&G (as defined below) distributed an aggregate total of 17,514,871 shares of common stock, par value $0.01 per share ("Common Stock"), of Antero Resources Corporation (the "Issuer") to their partners on a pro rata basis in accordance with their respective ownership interests as determined in accordance with the applicable limited partnership agreements of such entities (the "Distribution"), with no consideration being paid in connection therewith.

F2 · balance_after: This Form 4 is filed on behalf of (i) Warburg Pincus X Partners, L.P., a Delaware limited partnership ("WP X Partners"); and (ii) Warburg Pincus Private Equity X O&G, L.P., a Delaware limited partnership ("WP X O&G").

F3 · balance_after: Warburg Pincus X, L.P., a Delaware limited partnership ("WP X GP"), is the general partner of WP X Partners and WP X O&G. Warburg Pincus X GP L.P., a Delaware limited partnership ("WP X GP LP"), is the general partner of WP X GP. WPP GP LLC, a Delaware limited liability company ("WPP GP"), is the general partner of WP X GP LP. Warburg Pincus Partners, L.P., a Delaware limited partnership ("WP Partners"), is the managing member of WPP GP. Warburg Pincus Partners GP LLC, a Delaware limited liability company ("WP Partners GP"), is the general partner of WP Partners.

F4 · balance_after: Warburg Pincus & Co., a New York general partnership ("WP"), is the managing member of WP Partners GP.

F5 · balance_after: By reason of the provisions of Rule 16a-1 of the Securities Exchange Act of 1934, as amended (the "Exchange Act"), the Warburg Pincus Reporting Persons and certain affiliates may be deemed to be beneficial owners of 499,830 shares of Common Stock of the Issuer held by WP X Partners and 15,594,360 shares of Common Stock of the Issuer held by WP X O&G. The Warburg Pincus Reporting Persons and such affiliates disclaim beneficial ownership of such shares of Common Stock of the Issuer except to the extent of their direct pecuniary interest therein. WP Partners, WP Partners GP, and WP are directors-by-deputization solely for purposes of Section 16 of the Exchange Act. Information with respect to each of the Warburg Pincus Reporting Persons is given solely by such Warburg Pincus Reporting Person, and no Warburg Pincus Reporting Person has responsibility for the accuracy or completeness of information supplied by another Warburg Pincus Reporting Person.

F7 · balance_after: The original Form 4 filed on February 27, 2019 is amended by this Form 4 solely to correct an administrative error which misreported the distribution by WP X O&G that occurred on February 26, 2019 as a distribution of 17,514,873 shares of Common Stock when in fact 17,514,871 shares of Common Stock were distributed.

F6 · ownership.nature: Common Stock of the Issuer is held directly by WP X Partners.

SEC source: 0001104659-19-012155 · a4a.xml · nonDerivative · entry 1

Warburg Pincus Private Equity X O&G, L.P. · CIK 0001528258 · Director

Warburg Pincus X Partners, L.P. · CIK 0001451560 · Director

Warburg Pincus X, L.P. · CIK 0001414561 · Director

Warburg Pincus X GP L.P. · CIK 0001414564 · Director

WPP GP LLC · CIK 0001621874 · Director

Warburg Pincus Partners, L.P. · CIK 0001621242 · Director

Warburg Pincus Partners GP LLC · CIK 0001621224 · Director

WARBURG PINCUS & CO. · CIK 0000929408 · Director

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 15,594,360

F1 · kind: Effective February 26, 2019, WP X Partners (as defined below) and WP X O&G (as defined below) distributed an aggregate total of 17,514,871 shares of common stock, par value $0.01 per share ("Common Stock"), of Antero Resources Corporation (the "Issuer") to their partners on a pro rata basis in accordance with their respective ownership interests as determined in accordance with the applicable limited partnership agreements of such entities (the "Distribution"), with no consideration being paid in connection therewith.

F1 · price: Effective February 26, 2019, WP X Partners (as defined below) and WP X O&G (as defined below) distributed an aggregate total of 17,514,871 shares of common stock, par value $0.01 per share ("Common Stock"), of Antero Resources Corporation (the "Issuer") to their partners on a pro rata basis in accordance with their respective ownership interests as determined in accordance with the applicable limited partnership agreements of such entities (the "Distribution"), with no consideration being paid in connection therewith.

F2 · balance_after: This Form 4 is filed on behalf of (i) Warburg Pincus X Partners, L.P., a Delaware limited partnership ("WP X Partners"); and (ii) Warburg Pincus Private Equity X O&G, L.P., a Delaware limited partnership ("WP X O&G").

F3 · balance_after: Warburg Pincus X, L.P., a Delaware limited partnership ("WP X GP"), is the general partner of WP X Partners and WP X O&G. Warburg Pincus X GP L.P., a Delaware limited partnership ("WP X GP LP"), is the general partner of WP X GP. WPP GP LLC, a Delaware limited liability company ("WPP GP"), is the general partner of WP X GP LP. Warburg Pincus Partners, L.P., a Delaware limited partnership ("WP Partners"), is the managing member of WPP GP. Warburg Pincus Partners GP LLC, a Delaware limited liability company ("WP Partners GP"), is the general partner of WP Partners.

F4 · balance_after: Warburg Pincus & Co., a New York general partnership ("WP"), is the managing member of WP Partners GP.

F5 · balance_after: By reason of the provisions of Rule 16a-1 of the Securities Exchange Act of 1934, as amended (the "Exchange Act"), the Warburg Pincus Reporting Persons and certain affiliates may be deemed to be beneficial owners of 499,830 shares of Common Stock of the Issuer held by WP X Partners and 15,594,360 shares of Common Stock of the Issuer held by WP X O&G. The Warburg Pincus Reporting Persons and such affiliates disclaim beneficial ownership of such shares of Common Stock of the Issuer except to the extent of their direct pecuniary interest therein. WP Partners, WP Partners GP, and WP are directors-by-deputization solely for purposes of Section 16 of the Exchange Act. Information with respect to each of the Warburg Pincus Reporting Persons is given solely by such Warburg Pincus Reporting Person, and no Warburg Pincus Reporting Person has responsibility for the accuracy or completeness of information supplied by another Warburg Pincus Reporting Person.

F7 · balance_after: The original Form 4 filed on February 27, 2019 is amended by this Form 4 solely to correct an administrative error which misreported the distribution by WP X O&G that occurred on February 26, 2019 as a distribution of 17,514,873 shares of Common Stock when in fact 17,514,871 shares of Common Stock were distributed.

SEC source: 0001104659-18-070333 · a4.xml · nonDerivative · entry 8

WARBURG PINCUS & CO. · CIK 0000929408 · Director · 10% owner

WARBURG PINCUS LLC · CIK 0001162870 · Director · 10% owner

Warburg Pincus Partners, L.P. · CIK 0001621242 · Director · 10% owner

Warburg Pincus Partners GP LLC · CIK 0001621224 · Director · 10% owner

Warburg Pincus Private Equity VIII, L.P. · CIK 0001157334 · Director · 10% owner

Warburg Pincus International Partners, L.P. · CIK 0001299643 · Director · 10% owner

KAYE CHARLES R · CIK 0001239318 · Director · 10% owner

Landy Joseph P. · CIK 0001220638 · 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: 33,574,222

F2 · price: This amount represents the per share price of Common Shares sold to the Issuer pursuant to the Share Repurchase Agreement dated November 26, 2018 (the "Share Repurchase Agreement").

F8 · ownership.nature: Joseph P. Landy is a Managing General Partner of WP and a Managing Member and Co-Chief Executive Officer of WP LLC. Pursuant to Rule 16a-1 of the Exchange Act, Mr. Landy may be deemed to be the beneficial owner of any securities reported herein that may be deemed to be beneficially owned by the WP VIII Funds and the WPIP Funds.

F9 · ownership.nature: Pursuant to Rule 16a-1(a)(4) of the Exchange Act, each of WP VIII, WPIP, WP Partners, WP Partners GP, WP, WP LLC, Mr. Kaye and Mr. Landy herein state that this filing shall not be deemed an admission that he or it is the beneficial owner of any such Common Shares covered herein. Each of WP VIII, WPIP, WP Partners, WP Partners GP, WP, WP LLC, Mr. Kaye and Mr. Landy disclaims beneficial ownership of such Common Shares, except to the extent of its or his pecuniary interest in such Common Shares. This Form 4 shall not be deemed an admission that any reporting person or any other person referred to herein is a beneficial owner of any securities of the Issuer for purposes of Section 16 of the Exchange Act, or for any other purpose or that any reporting person or other person has an obligation to file this Form 4.

SEC source: 0001104659-18-070333 · a4.xml · nonDerivative · entry 7

WARBURG PINCUS & CO. · CIK 0000929408 · Director · 10% owner

WARBURG PINCUS LLC · CIK 0001162870 · Director · 10% owner

Warburg Pincus Partners, L.P. · CIK 0001621242 · Director · 10% owner

Warburg Pincus Partners GP LLC · CIK 0001621224 · Director · 10% owner

Warburg Pincus Private Equity VIII, L.P. · CIK 0001157334 · Director · 10% owner

Warburg Pincus International Partners, L.P. · CIK 0001299643 · Director · 10% owner

KAYE CHARLES R · CIK 0001239318 · Director · 10% owner

Landy Joseph P. · CIK 0001220638 · 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: 33,574,222

F2 · price: This amount represents the per share price of Common Shares sold to the Issuer pursuant to the Share Repurchase Agreement dated November 26, 2018 (the "Share Repurchase Agreement").

F5 · ownership.nature: Reflects the aggregate number of Common Shares directly owned by the WP VIII Funds and the WPIP Funds.

F6 · ownership.nature: WP-WPVIII Investors GP L.P., a Delaware limited partnership ("WP VIII Investors GP"), is the general partner of WP VIII Investors. WP-WPIP Investors GP L.P., a Delaware limited partnership ("WPIP Investors GP"), is the general partner of WPIP Investors. WPP GP LLC, a Delaware limited liability company ("WPP GP"), is the general partner of each of WP VIII Investors GP and WPIP Investors GP. Warburg Pincus Partners, L.P., a Delaware limited partnership ("WP Partners"), is (i) the managing member of WPP GP, and (ii) the general partner of WP VIII, WP VIII Netherlands, WPIP, and WPIP Netherlands. Warburg Pincus Partners GP LLC, a Delaware limited liability company ("WP Partners GP"), is the general partner of WP Partners. Warburg Pincus & Co., a New York general partnership ("WP"), is the managing member of WP Partners GP. The WP VIII Funds and WPIP Funds are managed by Warburg Pincus LLC, a New York limited liability company ("WP LLC").

F7 · ownership.nature: Charles R. Kaye is a Managing General Partner of WP and a Managing Member and Co-Chief Executive Officer of WP LLC. Pursuant to Rule 16a-1 of the Securities and Exchange Act of 1934, as amended (the "Exchange Act"), WP Partners, WP Partners GP, WP, WP LLC and Mr. Kaye may be deemed to be the beneficial owners of any securities reported herein that may be deemed to be beneficially owned by the WP VIII Funds and the WPIP Funds.

F9 · ownership.nature: Pursuant to Rule 16a-1(a)(4) of the Exchange Act, each of WP VIII, WPIP, WP Partners, WP Partners GP, WP, WP LLC, Mr. Kaye and Mr. Landy herein state that this filing shall not be deemed an admission that he or it is the beneficial owner of any such Common Shares covered herein. Each of WP VIII, WPIP, WP Partners, WP Partners GP, WP, WP LLC, Mr. Kaye and Mr. Landy disclaims beneficial ownership of such Common Shares, except to the extent of its or his pecuniary interest in such Common Shares. This Form 4 shall not be deemed an admission that any reporting person or any other person referred to herein is a beneficial owner of any securities of the Issuer for purposes of Section 16 of the Exchange Act, or for any other purpose or that any reporting person or other person has an obligation to file this Form 4.

SEC source: 0001104659-18-070333 · a4.xml · nonDerivative · entry 6

WARBURG PINCUS & CO. · CIK 0000929408 · Director · 10% owner

WARBURG PINCUS LLC · CIK 0001162870 · Director · 10% owner

Warburg Pincus Partners, L.P. · CIK 0001621242 · Director · 10% owner

Warburg Pincus Partners GP LLC · CIK 0001621224 · Director · 10% owner

Warburg Pincus Private Equity VIII, L.P. · CIK 0001157334 · Director · 10% owner

Warburg Pincus International Partners, L.P. · CIK 0001299643 · Director · 10% owner

KAYE CHARLES R · CIK 0001239318 · Director · 10% owner

Landy Joseph P. · CIK 0001220638 · 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: 68,574,222

F1 · price: This amount represents the per share price of common shares (the "Common Shares") of Kosmos Energy Ltd. (the "Issuer") sold by the underwriters in connection with a secondary offering of the Issuer pursuant to an Underwriting Agreement dated November 26, 2018 (the "Offering"). The material terms of the Offering are described in the prospectus supplement, dated November 26, 2018, filed by the Issuer with the Securities and Exchange Commission (the "SEC") on November 28, 2018.

F8 · ownership.nature: Joseph P. Landy is a Managing General Partner of WP and a Managing Member and Co-Chief Executive Officer of WP LLC. Pursuant to Rule 16a-1 of the Exchange Act, Mr. Landy may be deemed to be the beneficial owner of any securities reported herein that may be deemed to be beneficially owned by the WP VIII Funds and the WPIP Funds.

F9 · ownership.nature: Pursuant to Rule 16a-1(a)(4) of the Exchange Act, each of WP VIII, WPIP, WP Partners, WP Partners GP, WP, WP LLC, Mr. Kaye and Mr. Landy herein state that this filing shall not be deemed an admission that he or it is the beneficial owner of any such Common Shares covered herein. Each of WP VIII, WPIP, WP Partners, WP Partners GP, WP, WP LLC, Mr. Kaye and Mr. Landy disclaims beneficial ownership of such Common Shares, except to the extent of its or his pecuniary interest in such Common Shares. This Form 4 shall not be deemed an admission that any reporting person or any other person referred to herein is a beneficial owner of any securities of the Issuer for purposes of Section 16 of the Exchange Act, or for any other purpose or that any reporting person or other person has an obligation to file this Form 4.

SEC source: 0001104659-18-070333 · a4.xml · nonDerivative · entry 5

WARBURG PINCUS & CO. · CIK 0000929408 · Director · 10% owner

WARBURG PINCUS LLC · CIK 0001162870 · Director · 10% owner

Warburg Pincus Partners, L.P. · CIK 0001621242 · Director · 10% owner

Warburg Pincus Partners GP LLC · CIK 0001621224 · Director · 10% owner

Warburg Pincus Private Equity VIII, L.P. · CIK 0001157334 · Director · 10% owner

Warburg Pincus International Partners, L.P. · CIK 0001299643 · Director · 10% owner

KAYE CHARLES R · CIK 0001239318 · Director · 10% owner

Landy Joseph P. · CIK 0001220638 · 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: 68,574,222

F1 · price: This amount represents the per share price of common shares (the "Common Shares") of Kosmos Energy Ltd. (the "Issuer") sold by the underwriters in connection with a secondary offering of the Issuer pursuant to an Underwriting Agreement dated November 26, 2018 (the "Offering"). The material terms of the Offering are described in the prospectus supplement, dated November 26, 2018, filed by the Issuer with the Securities and Exchange Commission (the "SEC") on November 28, 2018.

F5 · ownership.nature: Reflects the aggregate number of Common Shares directly owned by the WP VIII Funds and the WPIP Funds.

F6 · ownership.nature: WP-WPVIII Investors GP L.P., a Delaware limited partnership ("WP VIII Investors GP"), is the general partner of WP VIII Investors. WP-WPIP Investors GP L.P., a Delaware limited partnership ("WPIP Investors GP"), is the general partner of WPIP Investors. WPP GP LLC, a Delaware limited liability company ("WPP GP"), is the general partner of each of WP VIII Investors GP and WPIP Investors GP. Warburg Pincus Partners, L.P., a Delaware limited partnership ("WP Partners"), is (i) the managing member of WPP GP, and (ii) the general partner of WP VIII, WP VIII Netherlands, WPIP, and WPIP Netherlands. Warburg Pincus Partners GP LLC, a Delaware limited liability company ("WP Partners GP"), is the general partner of WP Partners. Warburg Pincus & Co., a New York general partnership ("WP"), is the managing member of WP Partners GP. The WP VIII Funds and WPIP Funds are managed by Warburg Pincus LLC, a New York limited liability company ("WP LLC").

F7 · ownership.nature: Charles R. Kaye is a Managing General Partner of WP and a Managing Member and Co-Chief Executive Officer of WP LLC. Pursuant to Rule 16a-1 of the Securities and Exchange Act of 1934, as amended (the "Exchange Act"), WP Partners, WP Partners GP, WP, WP LLC and Mr. Kaye may be deemed to be the beneficial owners of any securities reported herein that may be deemed to be beneficially owned by the WP VIII Funds and the WPIP Funds.

F9 · ownership.nature: Pursuant to Rule 16a-1(a)(4) of the Exchange Act, each of WP VIII, WPIP, WP Partners, WP Partners GP, WP, WP LLC, Mr. Kaye and Mr. Landy herein state that this filing shall not be deemed an admission that he or it is the beneficial owner of any such Common Shares covered herein. Each of WP VIII, WPIP, WP Partners, WP Partners GP, WP, WP LLC, Mr. Kaye and Mr. Landy disclaims beneficial ownership of such Common Shares, except to the extent of its or his pecuniary interest in such Common Shares. This Form 4 shall not be deemed an admission that any reporting person or any other person referred to herein is a beneficial owner of any securities of the Issuer for purposes of Section 16 of the Exchange Act, or for any other purpose or that any reporting person or other person has an obligation to file this Form 4.

SEC source: 0001104659-18-070333 · a4.xml · nonDerivative · entry 4

WARBURG PINCUS & CO. · CIK 0000929408 · Director · 10% owner

WARBURG PINCUS LLC · CIK 0001162870 · Director · 10% owner

Warburg Pincus Partners, L.P. · CIK 0001621242 · Director · 10% owner

Warburg Pincus Partners GP LLC · CIK 0001621224 · Director · 10% owner

Warburg Pincus Private Equity VIII, L.P. · CIK 0001157334 · Director · 10% owner

Warburg Pincus International Partners, L.P. · CIK 0001299643 · Director · 10% owner

KAYE CHARLES R · CIK 0001239318 · Director · 10% owner

Landy Joseph P. · CIK 0001220638 · Director · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 16,090,787

F2 · price: This amount represents the per share price of Common Shares sold to the Issuer pursuant to the Share Repurchase Agreement dated November 26, 2018 (the "Share Repurchase Agreement").

F4 · ownership.direct: Reflects the number of Common Shares directly owned by Warburg Pincus International Partners, L.P., a Delaware limited partnership ("WPIP"). This number does not include the number of Common Shares held by Warburg Pincus Netherlands International Partners I C.V., a company incorporated under the laws of the Netherlands ("WPIP Netherlands"), and WP-WPIP Investors L.P., a Delaware limited partnership ("WPIP Investors"), which are limited partnerships affiliated with WPIP (WPIP Netherlands and WPIP Investors, together with WPIP, the "WPIP Funds"). WPIP Netherlands and WPIP Investors sold 345,000 Common Shares and 12,765 Common Shares, respectively, in connection with the Offering, and 700,000 Common Shares and 25,900 Common Shares, respectively, pursuant to the Share Repurchase Agreement, subsequent to which they own 671,488 Common Shares and 24,841 Common Shares, respectively.

SEC source: 0001104659-18-070333 · a4.xml · nonDerivative · entry 3

WARBURG PINCUS & CO. · CIK 0000929408 · Director · 10% owner

WARBURG PINCUS LLC · CIK 0001162870 · Director · 10% owner

Warburg Pincus Partners, L.P. · CIK 0001621242 · Director · 10% owner

Warburg Pincus Partners GP LLC · CIK 0001621224 · Director · 10% owner

Warburg Pincus Private Equity VIII, L.P. · CIK 0001157334 · Director · 10% owner

Warburg Pincus International Partners, L.P. · CIK 0001299643 · Director · 10% owner

KAYE CHARLES R · CIK 0001239318 · Director · 10% owner

Landy Joseph P. · CIK 0001220638 · Director · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 16,268,318

F2 · price: This amount represents the per share price of Common Shares sold to the Issuer pursuant to the Share Repurchase Agreement dated November 26, 2018 (the "Share Repurchase Agreement").

F3 · ownership.direct: Reflects the number of Common Shares directly owned by Warburg Pincus Private Equity VIII, L.P., a Delaware limited partnership ("WP VIII"). This number does not include the number of Common Shares held by Warburg Pincus Netherlands Private Equity VIII C.V. I, a company incorporated under the laws of the Netherlands ("WP VIII Netherlands") and WP-WPVIII Investors, L.P., a Delaware limited partnership ("WP VIII Investors"), which are limited partnerships affiliated with WP VIII (WP VIII Netherlands and WP VIII Investors, together with WP VIII, the "WP VIII Funds"). WP VIII Netherlands and WP VIII Investors sold 242,275 Common Shares and 24,227 Common Shares, respectively, in connection with the Offering, and 491,573 Common Shares and 49,157 Common Shares, respectively, pursuant to the Share Repurchase Agreement, subsequent to which they own 472,018 Common Shares and 46,770 Common Shares, respectively.

SEC source: 0001104659-18-070333 · a4.xml · nonDerivative · entry 2

WARBURG PINCUS & CO. · CIK 0000929408 · Director · 10% owner

WARBURG PINCUS LLC · CIK 0001162870 · Director · 10% owner

Warburg Pincus Partners, L.P. · CIK 0001621242 · Director · 10% owner

Warburg Pincus Partners GP LLC · CIK 0001621224 · Director · 10% owner

Warburg Pincus Private Equity VIII, L.P. · CIK 0001157334 · Director · 10% owner

Warburg Pincus International Partners, L.P. · CIK 0001299643 · Director · 10% owner

KAYE CHARLES R · CIK 0001239318 · Director · 10% owner

Landy Joseph P. · CIK 0001220638 · Director · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 32,864,887

F1 · price: This amount represents the per share price of common shares (the "Common Shares") of Kosmos Energy Ltd. (the "Issuer") sold by the underwriters in connection with a secondary offering of the Issuer pursuant to an Underwriting Agreement dated November 26, 2018 (the "Offering"). The material terms of the Offering are described in the prospectus supplement, dated November 26, 2018, filed by the Issuer with the Securities and Exchange Commission (the "SEC") on November 28, 2018.

F4 · ownership.direct: Reflects the number of Common Shares directly owned by Warburg Pincus International Partners, L.P., a Delaware limited partnership ("WPIP"). This number does not include the number of Common Shares held by Warburg Pincus Netherlands International Partners I C.V., a company incorporated under the laws of the Netherlands ("WPIP Netherlands"), and WP-WPIP Investors L.P., a Delaware limited partnership ("WPIP Investors"), which are limited partnerships affiliated with WPIP (WPIP Netherlands and WPIP Investors, together with WPIP, the "WPIP Funds"). WPIP Netherlands and WPIP Investors sold 345,000 Common Shares and 12,765 Common Shares, respectively, in connection with the Offering, and 700,000 Common Shares and 25,900 Common Shares, respectively, pursuant to the Share Repurchase Agreement, subsequent to which they own 671,488 Common Shares and 24,841 Common Shares, respectively.

SEC source: 0001104659-18-070333 · a4.xml · nonDerivative · entry 1

WARBURG PINCUS & CO. · CIK 0000929408 · Director · 10% owner

WARBURG PINCUS LLC · CIK 0001162870 · Director · 10% owner

Warburg Pincus Partners, L.P. · CIK 0001621242 · Director · 10% owner

Warburg Pincus Partners GP LLC · CIK 0001621224 · Director · 10% owner

Warburg Pincus Private Equity VIII, L.P. · CIK 0001157334 · Director · 10% owner

Warburg Pincus International Partners, L.P. · CIK 0001299643 · Director · 10% owner

KAYE CHARLES R · CIK 0001239318 · Director · 10% owner

Landy Joseph P. · CIK 0001220638 · Director · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 33,227,588

F1 · price: This amount represents the per share price of common shares (the "Common Shares") of Kosmos Energy Ltd. (the "Issuer") sold by the underwriters in connection with a secondary offering of the Issuer pursuant to an Underwriting Agreement dated November 26, 2018 (the "Offering"). The material terms of the Offering are described in the prospectus supplement, dated November 26, 2018, filed by the Issuer with the Securities and Exchange Commission (the "SEC") on November 28, 2018.

F3 · ownership.direct: Reflects the number of Common Shares directly owned by Warburg Pincus Private Equity VIII, L.P., a Delaware limited partnership ("WP VIII"). This number does not include the number of Common Shares held by Warburg Pincus Netherlands Private Equity VIII C.V. I, a company incorporated under the laws of the Netherlands ("WP VIII Netherlands") and WP-WPVIII Investors, L.P., a Delaware limited partnership ("WP VIII Investors"), which are limited partnerships affiliated with WP VIII (WP VIII Netherlands and WP VIII Investors, together with WP VIII, the "WP VIII Funds"). WP VIII Netherlands and WP VIII Investors sold 242,275 Common Shares and 24,227 Common Shares, respectively, in connection with the Offering, and 491,573 Common Shares and 49,157 Common Shares, respectively, pursuant to the Share Repurchase Agreement, subsequent to which they own 472,018 Common Shares and 46,770 Common Shares, respectively.

SEC source: 0001104659-18-067333 · a4.xml · nonDerivative · entry 3

Warburg Pincus Private Equity VIII, L.P. · CIK 0001157334 · Director · 10% owner

Warburg Pincus Partners, L.P. · CIK 0001621242 · Director · 10% owner

Warburg Pincus Partners GP LLC · CIK 0001621224 · Director · 10% owner

WARBURG PINCUS & CO. · CIK 0000929408 · 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: 0

F1 · balance_after: This Form 4 is filed on behalf of Warburg Pincus Private Equity VIII, L.P., a Delaware limited partnership ("WP VIII", and together with its two affiliated partnerships, Warburg Pincus Netherlands Private Equity VIII C.V. I, a company formed under the laws of the Netherlands ("WP VIII CV I"), and WP-WPVIII Investors, L.P., a Delaware limited partnership ("WP-WPVIII Investors"), collectively, the "WP VIII Funds").

F2 · balance_after: WP-WPVIII Investors GP L.P., a Delaware limited partnership ("WP-WPVIII Investors GP"), is the general partner of WP-WPVIII Investors. WPP GP LLC, a Delaware limited liability company ("WPP GP"), is the general partner of WP-WPVIII Investors GP. Warburg Pincus Partners, L.P., a Delaware limited partnership ("WP Partners"), is (i) the managing member of WPP GP, and (ii) the general partner of WP VIII and WP VIII CV I. Warburg Pincus Partners GP LLC, a Delaware limited liability company ("WP Partners GP"), is the general partner of WP Partners.

F3 · balance_after: Warburg Pincus & Co., a New York general partnership ("WP"), is the managing member of WP Partners GP.

F5 · ownership.nature: Common Stock of the Issuer is held directly by WP-WPVIII Investors.

SEC source: 0001104659-18-067333 · a4.xml · nonDerivative · entry 2

Warburg Pincus Private Equity VIII, L.P. · CIK 0001157334 · Director · 10% owner

Warburg Pincus Partners, L.P. · CIK 0001621242 · Director · 10% owner

Warburg Pincus Partners GP LLC · CIK 0001621224 · Director · 10% owner

WARBURG PINCUS & CO. · CIK 0000929408 · 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: 0

F1 · balance_after: This Form 4 is filed on behalf of Warburg Pincus Private Equity VIII, L.P., a Delaware limited partnership ("WP VIII", and together with its two affiliated partnerships, Warburg Pincus Netherlands Private Equity VIII C.V. I, a company formed under the laws of the Netherlands ("WP VIII CV I"), and WP-WPVIII Investors, L.P., a Delaware limited partnership ("WP-WPVIII Investors"), collectively, the "WP VIII Funds").

F2 · balance_after: WP-WPVIII Investors GP L.P., a Delaware limited partnership ("WP-WPVIII Investors GP"), is the general partner of WP-WPVIII Investors. WPP GP LLC, a Delaware limited liability company ("WPP GP"), is the general partner of WP-WPVIII Investors GP. Warburg Pincus Partners, L.P., a Delaware limited partnership ("WP Partners"), is (i) the managing member of WPP GP, and (ii) the general partner of WP VIII and WP VIII CV I. Warburg Pincus Partners GP LLC, a Delaware limited liability company ("WP Partners GP"), is the general partner of WP Partners.

F3 · balance_after: Warburg Pincus & Co., a New York general partnership ("WP"), is the managing member of WP Partners GP.

F4 · ownership.nature: Common Stock of the Issuer is held directly by WP VIII CV I.

SEC source: 0001104659-18-067333 · a4.xml · nonDerivative · entry 1

Warburg Pincus Private Equity VIII, L.P. · CIK 0001157334 · Director · 10% owner

Warburg Pincus Partners, L.P. · CIK 0001621242 · Director · 10% owner

Warburg Pincus Partners GP LLC · CIK 0001621224 · Director · 10% owner

WARBURG PINCUS & CO. · CIK 0000929408 · Director · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

F1 · balance_after: This Form 4 is filed on behalf of Warburg Pincus Private Equity VIII, L.P., a Delaware limited partnership ("WP VIII", and together with its two affiliated partnerships, Warburg Pincus Netherlands Private Equity VIII C.V. I, a company formed under the laws of the Netherlands ("WP VIII CV I"), and WP-WPVIII Investors, L.P., a Delaware limited partnership ("WP-WPVIII Investors"), collectively, the "WP VIII Funds").

F2 · balance_after: WP-WPVIII Investors GP L.P., a Delaware limited partnership ("WP-WPVIII Investors GP"), is the general partner of WP-WPVIII Investors. WPP GP LLC, a Delaware limited liability company ("WPP GP"), is the general partner of WP-WPVIII Investors GP. Warburg Pincus Partners, L.P., a Delaware limited partnership ("WP Partners"), is (i) the managing member of WPP GP, and (ii) the general partner of WP VIII and WP VIII CV I. Warburg Pincus Partners GP LLC, a Delaware limited liability company ("WP Partners GP"), is the general partner of WP Partners.

F3 · balance_after: Warburg Pincus & Co., a New York general partnership ("WP"), is the managing member of WP Partners GP.

SEC source: 0001104659-18-067332 · a4.xml · nonDerivative · entry 3

Warburg Pincus Private Equity X O&G, L.P. · CIK 0001528258 · Director · 10% owner

Warburg Pincus Private Equity X, L.P. · CIK 0001414565 · Director · 10% owner

Warburg Pincus X Partners, L.P. · CIK 0001451560 · Director · 10% owner

Warburg Pincus X, L.P. · CIK 0001414561 · Director · 10% owner

Warburg Pincus X GP L.P. · CIK 0001414564 · Director · 10% owner

WPP GP LLC · CIK 0001621874 · Director · 10% owner

Warburg Pincus Partners, L.P. · CIK 0001621242 · Director · 10% owner

Warburg Pincus Partners GP LLC · CIK 0001621224 · Director · 10% owner

WARBURG PINCUS & CO. · CIK 0000929408 · 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: 1,042,935

F1 · balance_after: This Form 4 is filed on behalf of (i) Warburg Pincus Private Equity X, L.P., a Delaware limited partnership ("WP X"), and Warburg Pincus X Partners, L.P., a Delaware limited partnership ("WP X Partners", and together with WP X, "WP X Funds"); and (ii) Warburg Pincus Private Equity X O&G, L.P., a Delaware limited partnership ("WP X O&G").

F2 · balance_after: Warburg Pincus X, L.P., a Delaware limited partnership ("WP X GP"), is the general partner of the WP X Funds and WP X O&G. Warburg Pincus X GP L.P., a Delaware limited partnership ("WP X GP LP"), is the general partner of WP X GP. WPP GP LLC, a Delaware limited liability company ("WPP GP"), is the general partner of WP X GP LP. Warburg Pincus Partners, L.P., a Delaware limited partnership ("WP Partners"), is the managing member of WPP GP. Warburg Pincus Partners GP LLC, a Delaware limited liability company ("WP Partners GP"), is the general partner of WP Partners.

F3 · balance_after: Warburg Pincus & Co., a New York general partnership ("WP"), is the managing member of WP Partners GP.

F4 · balance_after: By reason of the provisions of Rule 16a-1 of the Securities Exchange Act of 1934, as amended (the "Exchange Act"), the Warburg Pincus Reporting Persons and certain affiliates may be deemed to be beneficial owners of 1,042,935 shares of common stock, par value $0.01 per share ("Common Stock") of Antero Resources Corporation (the "Issuer") held collectively by the WP X Funds and 32,566,126 shares of Common Stock of the Issuer held by WP X O&G. The Warburg Pincus Reporting Persons and such affiliates disclaim beneficial ownership of such shares of Common Stock of the Issuer except to the extent of their direct pecuniary interest therein. WP Partners, WP Partners GP, and WP are directors-by-deputization solely for purposes of Section 16 of the Exchange Act.

F5 · balance_after: Information with respect to each of the Warburg Pincus Reporting Persons is given solely by such Warburg Pincus Reporting Person, and no Warburg Pincus Reporting Person has responsibility for the accuracy or completeness of information supplied by another Warburg Pincus Reporting Person.

F7 · ownership.nature: Common Stock of the Issuer is held directly by WP X Partners.

SEC source: 0001104659-18-067332 · a4.xml · nonDerivative · entry 2

Warburg Pincus Private Equity X O&G, L.P. · CIK 0001528258 · Director · 10% owner

Warburg Pincus Private Equity X, L.P. · CIK 0001414565 · Director · 10% owner

Warburg Pincus X Partners, L.P. · CIK 0001451560 · Director · 10% owner

Warburg Pincus X, L.P. · CIK 0001414561 · Director · 10% owner

Warburg Pincus X GP L.P. · CIK 0001414564 · Director · 10% owner

WPP GP LLC · CIK 0001621874 · Director · 10% owner

Warburg Pincus Partners, L.P. · CIK 0001621242 · Director · 10% owner

Warburg Pincus Partners GP LLC · CIK 0001621224 · Director · 10% owner

WARBURG PINCUS & CO. · CIK 0000929408 · 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: 0

F6 · ownership.nature: Common Stock of the Issuer is held directly by WP X.

SEC source: 0001104659-18-067332 · a4.xml · nonDerivative · entry 1

Warburg Pincus Private Equity X O&G, L.P. · CIK 0001528258 · Director · 10% owner

Warburg Pincus Private Equity X, L.P. · CIK 0001414565 · Director · 10% owner

Warburg Pincus X Partners, L.P. · CIK 0001451560 · Director · 10% owner

Warburg Pincus X, L.P. · CIK 0001414561 · Director · 10% owner

Warburg Pincus X GP L.P. · CIK 0001414564 · Director · 10% owner

WPP GP LLC · CIK 0001621874 · Director · 10% owner

Warburg Pincus Partners, L.P. · CIK 0001621242 · Director · 10% owner

Warburg Pincus Partners GP LLC · CIK 0001621224 · Director · 10% owner

WARBURG PINCUS & CO. · CIK 0000929408 · Director · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 32,566,126

F1 · balance_after: This Form 4 is filed on behalf of (i) Warburg Pincus Private Equity X, L.P., a Delaware limited partnership ("WP X"), and Warburg Pincus X Partners, L.P., a Delaware limited partnership ("WP X Partners", and together with WP X, "WP X Funds"); and (ii) Warburg Pincus Private Equity X O&G, L.P., a Delaware limited partnership ("WP X O&G").

F2 · balance_after: Warburg Pincus X, L.P., a Delaware limited partnership ("WP X GP"), is the general partner of the WP X Funds and WP X O&G. Warburg Pincus X GP L.P., a Delaware limited partnership ("WP X GP LP"), is the general partner of WP X GP. WPP GP LLC, a Delaware limited liability company ("WPP GP"), is the general partner of WP X GP LP. Warburg Pincus Partners, L.P., a Delaware limited partnership ("WP Partners"), is the managing member of WPP GP. Warburg Pincus Partners GP LLC, a Delaware limited liability company ("WP Partners GP"), is the general partner of WP Partners.

F3 · balance_after: Warburg Pincus & Co., a New York general partnership ("WP"), is the managing member of WP Partners GP.

F4 · balance_after: By reason of the provisions of Rule 16a-1 of the Securities Exchange Act of 1934, as amended (the "Exchange Act"), the Warburg Pincus Reporting Persons and certain affiliates may be deemed to be beneficial owners of 1,042,935 shares of common stock, par value $0.01 per share ("Common Stock") of Antero Resources Corporation (the "Issuer") held collectively by the WP X Funds and 32,566,126 shares of Common Stock of the Issuer held by WP X O&G. The Warburg Pincus Reporting Persons and such affiliates disclaim beneficial ownership of such shares of Common Stock of the Issuer except to the extent of their direct pecuniary interest therein. WP Partners, WP Partners GP, and WP are directors-by-deputization solely for purposes of Section 16 of the Exchange Act.

F5 · balance_after: Information with respect to each of the Warburg Pincus Reporting Persons is given solely by such Warburg Pincus Reporting Person, and no Warburg Pincus Reporting Person has responsibility for the accuracy or completeness of information supplied by another Warburg Pincus Reporting Person.