AM

SEC source: 0000899243-19-007857 · doc4.xml · nonDerivative · entry 1

Keenan W Howard JR · CIK 0001370287 · Director

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 was converted into one share of common stock of New AM.

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 was converted into one share of common stock of New AM.

SEC source: 0001104659-19-014964 · a4.xml · nonDerivative · entry 8

Warren Glen C Jr · CIK 0001375364 · Director · President and Secretary · 10% owner

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 16,889,463

F5 · kind: Pursuant to the Simplification Agreement, each phantom unit issued by Antero Midstream Partners LP ("Phantom Unit") was converted into the right to receive 1.8926 restricted stock units (the "RSUs"), each settleable in one share of New AM Common Stock. The RSUs will be subject to the following vesting schedule: (i) 44,554 RSUs will vest as to one half on each of April 15, 2019 and April 15, 2020; and (ii) 65,654 RSUs will vest as to one third on each of April 15, 2019, April 15, 2020 and April 15, 2021.

F5 · price: Pursuant to the Simplification Agreement, each phantom unit issued by Antero Midstream Partners LP ("Phantom Unit") was converted into the right to receive 1.8926 restricted stock units (the "RSUs"), each settleable in one share of New AM Common Stock. The RSUs will be subject to the following vesting schedule: (i) 44,554 RSUs will vest as to one half on each of April 15, 2019 and April 15, 2020; and (ii) 65,654 RSUs will vest as to one third on each of April 15, 2019, April 15, 2020 and April 15, 2021.

SEC source: 0001104659-19-014964 · a4.xml · nonDerivative · entry 7

Warren Glen C Jr · CIK 0001375364 · Director · President and Secretary · 10% owner

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 16,779,255

F4 · kind: Pursuant to the Simplification Agreement, each outstanding Series B Unit representing limited liability company interests ("Series B Units") in Antero IDR Holdings LLC was exchanged for 176.0041 shares of New AM Common Stock (the "Series B Exchange Shares"). The Series B Exchange Shares will be subject to the same vesting conditions to which the Series B Units were subject, with two-thirds fully vested and one-third, 1,877,261 shares of New AM Common Stock, scheduled to vest at December 31, 2019.

F4 · price: Pursuant to the Simplification Agreement, each outstanding Series B Unit representing limited liability company interests ("Series B Units") in Antero IDR Holdings LLC was exchanged for 176.0041 shares of New AM Common Stock (the "Series B Exchange Shares"). The Series B Exchange Shares will be subject to the same vesting conditions to which the Series B Units were subject, with two-thirds fully vested and one-third, 1,877,261 shares of New AM Common Stock, scheduled to vest at December 31, 2019.

SEC source: 0001104659-19-014964 · a4.xml · nonDerivative · entry 6

Warren Glen C Jr · CIK 0001375364 · Director · President and Secretary · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnote

Disclosed balance after: 3,966,804

F3 · kind: Received in exchange for 134,996 common units representing limited partnership interests ("AM Common Units") of Antero Midstream Partners LP ("AM") pursuant to the Simplification Agreement (the "Simplification Agreement"), dated as of October 9, 2018, by and among the Issuer, AM and certain of their affiliates. Pursuant to the Simplification Agreement, holders of AM Common Units (other than Antero Resources Corporation) received, in exchange for each AM Common Unit held, (i) $3.415 in cash without interest and 1.6350 shares of New AM Common Stock, (ii) 1.8926 shares of New AM Common Stock, or (iii) $10.1364 in cash and 1.1279 shares of New AM Common Stock.

F3 · price: Received in exchange for 134,996 common units representing limited partnership interests ("AM Common Units") of Antero Midstream Partners LP ("AM") pursuant to the Simplification Agreement (the "Simplification Agreement"), dated as of October 9, 2018, by and among the Issuer, AM and certain of their affiliates. Pursuant to the Simplification Agreement, holders of AM Common Units (other than Antero Resources Corporation) received, in exchange for each AM Common Unit held, (i) $3.415 in cash without interest and 1.6350 shares of New AM Common Stock, (ii) 1.8926 shares of New AM Common Stock, or (iii) $10.1364 in cash and 1.1279 shares of New AM Common Stock.

F2 · ownership.nature: Represents securities held by Canton Investment Holdings LLC ("Canton"). The Reporting Person is the managing member and 50% owner of Canton. The Reporting Person disclaims beneficial ownership of all securities held by Canton except to the extent of his pecuniary interest therein.

SEC source: 0001104659-19-014964 · a4.xml · nonDerivative · entry 5

Warren Glen C Jr · CIK 0001375364 · Director · President and Secretary · 10% owner

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 11,147,124

F3 · kind: Received in exchange for 134,996 common units representing limited partnership interests ("AM Common Units") of Antero Midstream Partners LP ("AM") pursuant to the Simplification Agreement (the "Simplification Agreement"), dated as of October 9, 2018, by and among the Issuer, AM and certain of their affiliates. Pursuant to the Simplification Agreement, holders of AM Common Units (other than Antero Resources Corporation) received, in exchange for each AM Common Unit held, (i) $3.415 in cash without interest and 1.6350 shares of New AM Common Stock, (ii) 1.8926 shares of New AM Common Stock, or (iii) $10.1364 in cash and 1.1279 shares of New AM Common Stock.

F3 · price: Received in exchange for 134,996 common units representing limited partnership interests ("AM Common Units") of Antero Midstream Partners LP ("AM") pursuant to the Simplification Agreement (the "Simplification Agreement"), dated as of October 9, 2018, by and among the Issuer, AM and certain of their affiliates. Pursuant to the Simplification Agreement, holders of AM Common Units (other than Antero Resources Corporation) received, in exchange for each AM Common Unit held, (i) $3.415 in cash without interest and 1.6350 shares of New AM Common Stock, (ii) 1.8926 shares of New AM Common Stock, or (iii) $10.1364 in cash and 1.1279 shares of New AM Common Stock.

SEC source: 0001104659-19-014964 · a4.xml · nonDerivative · entry 4

Warren Glen C Jr · CIK 0001375364 · Director · President and Secretary · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnote

Disclosed balance after: 3,891,100

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, each common share representing limited partnership interests of AMGP was converted into one share of common stock of New AM ("New AM Common Stock").

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, each common share representing limited partnership interests of AMGP was converted into one share of common stock of New AM ("New AM Common Stock").

F2 · ownership.nature: Represents securities held by Canton Investment Holdings LLC ("Canton"). The Reporting Person is the managing member and 50% owner of Canton. The Reporting Person disclaims beneficial ownership of all securities held by Canton except to the extent of his pecuniary interest therein.

SEC source: 0001104659-19-014964 · a4.xml · nonDerivative · entry 3

Warren Glen C Jr · CIK 0001375364 · Director · President and Secretary · 10% owner

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 11,039,979

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, each common share representing limited partnership interests of AMGP was converted into one share of common stock of New AM ("New AM Common Stock").

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, each common share representing limited partnership interests of AMGP was converted into one share of common stock of New AM ("New AM Common Stock").

SEC source: 0001104659-19-014964 · a4.xml · nonDerivative · entry 2

Warren Glen C Jr · CIK 0001375364 · Director · President and Secretary · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnote

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, each common share representing limited partnership interests of AMGP was converted into one share of common stock of New AM ("New AM Common Stock").

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, each common share representing limited partnership interests of AMGP was converted into one share of common stock of New AM ("New AM Common Stock").

F2 · ownership.nature: Represents securities held by Canton Investment Holdings LLC ("Canton"). The Reporting Person is the managing member and 50% owner of Canton. The Reporting Person disclaims beneficial ownership of all securities held by Canton except to the extent of his pecuniary interest therein.

SEC source: 0001104659-19-014964 · a4.xml · nonDerivative · entry 1

Warren Glen C Jr · CIK 0001375364 · Director · President and Secretary · 10% 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, each common share representing limited partnership interests of AMGP was converted into one share of common stock of New AM ("New AM Common Stock").

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, each common share representing limited partnership interests of AMGP was converted into one share of common stock of New AM ("New AM Common Stock").

SEC source: 0000899243-19-007793 · doc4.xml · nonDerivative · entry 4

Levy James R. · CIK 0001535563 · Director

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: The Reporting Person is a Partner of Warburg Pincus & Co., a New York general partnership ("WP"), and a Member and Managing Director of Warburg Pincus LLC, a New York limited liability company ("WP LLC"). As of March 12, 2019, the Warburg Pincus Entities (as defined below) collectively owned 55,109,589 AMGP Common Shares (prior to the Conversion) and 55,109,589 New AM Common Shares (after the Conversion).

F3 · ownership.nature: All AMGP Common Shares or New AM Common Shares indicated as indirectly owned by the Reporting Person are included because of his affiliation with the Warburg Pincus Entities, due to which Mr. Levy may be deemed to have an indirect pecuniary interest (within the meaning of Rule 16a-1 under the Securities and Exchange Act of 1934, as amended) in an indeterminate portion of the AMGP Common Shares and the New AM Common Shares owned by the Warburg Pincus Entities. Mr. Levy disclaims beneficial ownership of all AMGP Common Shares and all New AM Common Shares attributable to the Warburg Pincus Entities except to the extent of his pecuniary interest therein.

F4 · ownership.nature: The Warburg Pincus funds are 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"), Warburg Pincus Private Equity X O&G, L.P., a Delaware limited partnership ("WP X O&G"), and Warburg Pincus X Partners, L.P., a Delaware limited partnership ("WP X Partners", and together with WP X O&G, the "WP X O&G Funds"). WP-WPVIII Investors GP L.P., a Delaware limited partnership ("WP-WPVIII GP"), is the general partner of WP-WPVIII Investors. 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.

F5 · ownership.nature: 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-WPVIII GP and WP X GP LP. Warburg Pincus Partners, L.P., a Delaware limited partnership ("WP Partners"), is (a) the managing member of WPP GP, and (b) 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. WP is the managing member of WP Partners GP. WP LLC is the manager of each of the WP VIII Funds and the WP X O&G Funds.

F6 · ownership.nature: Each of the WP VIII Funds, the WP X O&G 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."

SEC source: 0000899243-19-007793 · doc4.xml · nonDerivative · entry 3

Levy James R. · CIK 0001535563 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 16,477

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").

SEC source: 0000899243-19-007793 · doc4.xml · nonDerivative · entry 2

Levy James R. · CIK 0001535563 · Director

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: The Reporting Person is a Partner of Warburg Pincus & Co., a New York general partnership ("WP"), and a Member and Managing Director of Warburg Pincus LLC, a New York limited liability company ("WP LLC"). As of March 12, 2019, the Warburg Pincus Entities (as defined below) collectively owned 55,109,589 AMGP Common Shares (prior to the Conversion) and 55,109,589 New AM Common Shares (after the Conversion).

F3 · ownership.nature: All AMGP Common Shares or New AM Common Shares indicated as indirectly owned by the Reporting Person are included because of his affiliation with the Warburg Pincus Entities, due to which Mr. Levy may be deemed to have an indirect pecuniary interest (within the meaning of Rule 16a-1 under the Securities and Exchange Act of 1934, as amended) in an indeterminate portion of the AMGP Common Shares and the New AM Common Shares owned by the Warburg Pincus Entities. Mr. Levy disclaims beneficial ownership of all AMGP Common Shares and all New AM Common Shares attributable to the Warburg Pincus Entities except to the extent of his pecuniary interest therein.

F4 · ownership.nature: The Warburg Pincus funds are 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"), Warburg Pincus Private Equity X O&G, L.P., a Delaware limited partnership ("WP X O&G"), and Warburg Pincus X Partners, L.P., a Delaware limited partnership ("WP X Partners", and together with WP X O&G, the "WP X O&G Funds"). WP-WPVIII Investors GP L.P., a Delaware limited partnership ("WP-WPVIII GP"), is the general partner of WP-WPVIII Investors. 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.

F5 · ownership.nature: 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-WPVIII GP and WP X GP LP. Warburg Pincus Partners, L.P., a Delaware limited partnership ("WP Partners"), is (a) the managing member of WPP GP, and (b) 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. WP is the managing member of WP Partners GP. WP LLC is the manager of each of the WP VIII Funds and the WP X O&G Funds.

F6 · ownership.nature: Each of the WP VIII Funds, the WP X O&G 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."

SEC source: 0000899243-19-007793 · doc4.xml · nonDerivative · entry 1

Levy James R. · CIK 0001535563 · Director

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").

SEC source: 0001104659-19-014956 · a4.xml · nonDerivative · entry 4

Kilstrom Kevin J. · CIK 0001586805 · Sr Vice President - Production

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,011,153

F3 · kind: Pursuant to the Simplification Agreement, each phantom unit issued by Antero Midstream Partners LP ("Phantom Unit") was converted into the right to receive 1.8926 restricted stock units (the "RSUs"), each settleable in one share of New AM Common Stock. The RSUs will be subject to the following vesting schedule: (i) 15,593 RSUs will vest as to one half on each of April 15, 2019 and April 15, 2020; and (ii) 24,293 RSUs will vest as to one third on each of April 15, 2019, April 15, 2020 and April 15, 2021.

F3 · price: Pursuant to the Simplification Agreement, each phantom unit issued by Antero Midstream Partners LP ("Phantom Unit") was converted into the right to receive 1.8926 restricted stock units (the "RSUs"), each settleable in one share of New AM Common Stock. The RSUs will be subject to the following vesting schedule: (i) 15,593 RSUs will vest as to one half on each of April 15, 2019 and April 15, 2020; and (ii) 24,293 RSUs will vest as to one third on each of April 15, 2019, April 15, 2020 and April 15, 2021.

SEC source: 0001104659-19-014956 · a4.xml · nonDerivative · entry 3

Kilstrom Kevin J. · CIK 0001586805 · Sr Vice President - Production

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 971,267

F2 · kind: Received in exchange for 32,856 common units representing limited partnership interests ("AM Common Units") of Antero Midstream Partners LP ("AM") pursuant to the Simplification Agreement (the "Simplification Agreement"), dated as of October 9, 2018, by and among the Issuer, AM and certain of their affiliates. Pursuant to the Simplification Agreement, holders of AM Common Units (other than Antero Resources Corporation) received, in exchange for each AM Common Unit held, (i) $3.415 in cash without interest and 1.6350 shares of New AM Common Stock, (ii) 1.8926 shares of New AM Common Stock, or (iii) $10.1364 in cash and 1.1279 shares of New AM Common Stock.

F2 · price: Received in exchange for 32,856 common units representing limited partnership interests ("AM Common Units") of Antero Midstream Partners LP ("AM") pursuant to the Simplification Agreement (the "Simplification Agreement"), dated as of October 9, 2018, by and among the Issuer, AM and certain of their affiliates. Pursuant to the Simplification Agreement, holders of AM Common Units (other than Antero Resources Corporation) received, in exchange for each AM Common Unit held, (i) $3.415 in cash without interest and 1.6350 shares of New AM Common Stock, (ii) 1.8926 shares of New AM Common Stock, or (iii) $10.1364 in cash and 1.1279 shares of New AM Common Stock.

SEC source: 0001104659-19-014956 · a4.xml · nonDerivative · entry 2

Kilstrom Kevin J. · CIK 0001586805 · Sr Vice President - Production

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 917,548

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, each common share representing limited partnership interests of AMGP was converted into one share of common stock of New AM ("New AM Common Stock").

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, each common share representing limited partnership interests of AMGP was converted into one share of common stock of New AM ("New AM Common Stock").

SEC source: 0001104659-19-014956 · a4.xml · nonDerivative · entry 1

Kilstrom Kevin J. · CIK 0001586805 · Sr Vice President - Production

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, each common share representing limited partnership interests of AMGP was converted into one share of common stock of New AM ("New AM Common Stock").

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, each common share representing limited partnership interests of AMGP was converted into one share of common stock of New AM ("New AM Common Stock").

SEC source: 0001104659-19-014963 · a4.xml · nonDerivative · entry 4

Schopp Alvyn A. · CIK 0001586799 · See Remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,477,857

F3 · kind: Pursuant to the Simplification Agreement, each phantom unit issued by Antero Midstream Partners LP ("Phantom Unit") was converted into the right to receive 1.8926 restricted stock units (the "RSUs"), each settleable in one share of New AM Common Stock. The RSUs will be subject to the following vesting schedule: (i) 15,593 RSUs will vest as to one half on each of April 15, 2019 and April 15, 2020; and (ii) 24,293 RSUs will vest as to one third on each of April 15, 2019, April 15, 2020 and April 15, 2021.

F3 · price: Pursuant to the Simplification Agreement, each phantom unit issued by Antero Midstream Partners LP ("Phantom Unit") was converted into the right to receive 1.8926 restricted stock units (the "RSUs"), each settleable in one share of New AM Common Stock. The RSUs will be subject to the following vesting schedule: (i) 15,593 RSUs will vest as to one half on each of April 15, 2019 and April 15, 2020; and (ii) 24,293 RSUs will vest as to one third on each of April 15, 2019, April 15, 2020 and April 15, 2021.

SEC source: 0001104659-19-014963 · a4.xml · nonDerivative · entry 3

Schopp Alvyn A. · CIK 0001586799 · See Remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,437,971

F2 · kind: Received in exchange for 38,856 common units representing limited partnership interests ("AM Common Units") of Antero Midstream Partners LP ("AM") pursuant to the Simplification Agreement (the "Simplification Agreement"), dated as of October 9, 2018, by and among the Issuer, AM and certain of their affiliates. Pursuant to the Simplification Agreement, holders of AM Common Units (other than Antero Resources Corporation) received, in exchange for each AM Common Unit held, (i) $3.415 in cash without interest and 1.6350 shares of New AM Common Stock, (ii) 1.8926 shares of New AM Common Stock, or (iii) $10.1364 in cash and 1.1279 shares of New AM Common Stock.

F2 · price: Received in exchange for 38,856 common units representing limited partnership interests ("AM Common Units") of Antero Midstream Partners LP ("AM") pursuant to the Simplification Agreement (the "Simplification Agreement"), dated as of October 9, 2018, by and among the Issuer, AM and certain of their affiliates. Pursuant to the Simplification Agreement, holders of AM Common Units (other than Antero Resources Corporation) received, in exchange for each AM Common Unit held, (i) $3.415 in cash without interest and 1.6350 shares of New AM Common Stock, (ii) 1.8926 shares of New AM Common Stock, or (iii) $10.1364 in cash and 1.1279 shares of New AM Common Stock.

SEC source: 0001104659-19-014963 · a4.xml · nonDerivative · entry 2

Schopp Alvyn A. · CIK 0001586799 · See Remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,394,146

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, each common share representing limited partnership interests of AMGP was converted into one share of common stock of New AM ("New AM Common Stock").

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, each common share representing limited partnership interests of AMGP was converted into one share of common stock of New AM ("New AM Common Stock").

SEC source: 0001104659-19-014963 · a4.xml · nonDerivative · entry 1

Schopp Alvyn A. · CIK 0001586799 · See Remarks

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, each common share representing limited partnership interests of AMGP was converted into one share of common stock of New AM ("New AM Common Stock").

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, each common share representing limited partnership interests of AMGP was converted into one share of common stock of New AM ("New AM Common Stock").

SEC source: 0001104659-19-014966 · a4.xml · nonDerivative · entry 5

Yoo K. Phil · CIK 0001587503 · See Remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 327,490

F4 · kind: Pursuant to the Simplification Agreement, each phantom unit issued by Antero Midstream Partners LP ("Phantom Unit") was converted into the right to receive 1.8926 restricted stock units (the "RSUs"), each settleable in one share of New AM Common Stock. The RSUs will be subject to the following vesting schedule: (i) 4,455 RSUs will vest as to one half on each of April 15, 2019 and April 15, 2020; (ii) 10,943 RSUs will vest as to one third on each of April 15, 2019, April 15, 2020 and April 15, 2021; and (iii) 18,865 RSUs will vest as to one fourth on each of April 15, 2019, April 15, 2020, April 15, 2021 and April 15, 2022.

F4 · price: Pursuant to the Simplification Agreement, each phantom unit issued by Antero Midstream Partners LP ("Phantom Unit") was converted into the right to receive 1.8926 restricted stock units (the "RSUs"), each settleable in one share of New AM Common Stock. The RSUs will be subject to the following vesting schedule: (i) 4,455 RSUs will vest as to one half on each of April 15, 2019 and April 15, 2020; (ii) 10,943 RSUs will vest as to one third on each of April 15, 2019, April 15, 2020 and April 15, 2021; and (iii) 18,865 RSUs will vest as to one fourth on each of April 15, 2019, April 15, 2020, April 15, 2021 and April 15, 2022.

SEC source: 0001104659-19-014966 · a4.xml · nonDerivative · entry 4

Yoo K. Phil · CIK 0001587503 · See Remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 293,227

F3 · kind: Pursuant to the Simplification Agreement, each outstanding Series B Unit representing limited liability company interests ("Series B Units") in Antero IDR Holdings LLC was exchanged for 176.0041 shares of New AM Common Stock (the "Series B Exchange Shares"). The Series B Exchange Shares will be subject to the same vesting conditions to which the Series B Units were subject, with two-thirds fully vested and one-third, 58,609 shares of New AM Common Stock, scheduled to vest at December 31, 2019.

F3 · price: Pursuant to the Simplification Agreement, each outstanding Series B Unit representing limited liability company interests ("Series B Units") in Antero IDR Holdings LLC was exchanged for 176.0041 shares of New AM Common Stock (the "Series B Exchange Shares"). The Series B Exchange Shares will be subject to the same vesting conditions to which the Series B Units were subject, with two-thirds fully vested and one-third, 58,609 shares of New AM Common Stock, scheduled to vest at December 31, 2019.

SEC source: 0001104659-19-014966 · a4.xml · nonDerivative · entry 3

Yoo K. Phil · CIK 0001587503 · See Remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 117,223

F2 · kind: Received in exchange for 18,132 common units representing limited partnership interests ("AM Common Units") of Antero Midstream Partners LP ("AM") pursuant to the Simplification Agreement (the "Simplification Agreement"), dated as of October 9, 2018, by and among the Issuer, AM and certain of their affiliates. Pursuant to the Simplification Agreement, holders of AM Common Units (other than Antero Resources Corporation) received, in exchange for each AM Common Unit held, (i) $3.415 in cash without interest and 1.6350 shares of New AM Common Stock, (ii) 1.8926 shares of New AM Common Stock, or (iii) $10.1364 in cash and 1.1279 shares of New AM Common Stock.

F2 · price: Received in exchange for 18,132 common units representing limited partnership interests ("AM Common Units") of Antero Midstream Partners LP ("AM") pursuant to the Simplification Agreement (the "Simplification Agreement"), dated as of October 9, 2018, by and among the Issuer, AM and certain of their affiliates. Pursuant to the Simplification Agreement, holders of AM Common Units (other than Antero Resources Corporation) received, in exchange for each AM Common Unit held, (i) $3.415 in cash without interest and 1.6350 shares of New AM Common Stock, (ii) 1.8926 shares of New AM Common Stock, or (iii) $10.1364 in cash and 1.1279 shares of New AM Common Stock.

SEC source: 0001104659-19-014966 · a4.xml · nonDerivative · entry 2

Yoo K. Phil · CIK 0001587503 · See Remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 87,578

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, each common unit representing limited partnership interests of AMGP was converted into one share of common stock of New AM ("New AM Common Stock").

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, each common unit representing limited partnership interests of AMGP was converted into one share of common stock of New AM ("New AM Common Stock").

SEC source: 0001104659-19-014966 · a4.xml · nonDerivative · entry 1

Yoo K. Phil · CIK 0001587503 · See Remarks

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, each common unit representing limited partnership interests of AMGP was converted into one share of common stock of New AM ("New AM Common Stock").

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, each common unit representing limited partnership interests of AMGP was converted into one share of common stock of New AM ("New AM Common Stock").

SEC source: 0000899243-19-007888 · doc4.xml · nonDerivative · entry 2

Yorktown Energy Partners VIII, L.P. · CIK 0001473116 · Director · 10% owner

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 7,091,699

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, each common share representing limited partnership interests of AMGP was converted into one share of common stock of New AM.

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, each common share representing limited partnership interests of AMGP was converted into one share of common stock of New AM.

SEC source: 0000899243-19-007888 · doc4.xml · nonDerivative · entry 1

Yorktown Energy Partners VIII, L.P. · CIK 0001473116 · Director · 10% 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, each common share representing limited partnership interests of AMGP was converted into one share of common stock of New AM.

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, each common share representing limited partnership interests of AMGP was converted into one share of common stock of New AM.

SEC source: 0000899243-19-007890 · doc4.xml · nonDerivative · entry 2

Yorktown VIII Associates LLC · CIK 0001473117 · Director · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 7,091,699

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, each common share representing limited partnership interests of AMGP was converted into one share of common stock of New AM.

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, each common share representing limited partnership interests of AMGP was converted into one share of common stock of New AM.

F2 · ownership.nature: These securities are owned directly by Yorktown Energy Partners VIII, L.P. ("Yorktown VIII"). The Reporting Person is the sole general partner of Yorktown VIII Company LP. Yorktown VIII Company LP is the sole general partner of Yorktown VIII.

F3 · ownership.nature: The Reporting Person disclaims beneficial ownership of these securities except to the extent of its pecuniary interest therein and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of the securities for Section 16 or any other purpose.

SEC source: 0000899243-19-007890 · doc4.xml · nonDerivative · entry 1

Yorktown VIII Associates LLC · CIK 0001473117 · Director · 10% 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, each common share representing limited partnership interests of AMGP was converted into one share of common stock of New AM.

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, each common share representing limited partnership interests of AMGP was converted into one share of common stock of New AM.

F2 · ownership.nature: These securities are owned directly by Yorktown Energy Partners VIII, L.P. ("Yorktown VIII"). The Reporting Person is the sole general partner of Yorktown VIII Company LP. Yorktown VIII Company LP is the sole general partner of Yorktown VIII.

F3 · ownership.nature: The Reporting Person disclaims beneficial ownership of these securities except to the extent of its pecuniary interest therein and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of the securities for Section 16 or any other purpose.

SEC source: 0000899243-19-007887 · doc4.xml · nonDerivative · entry 2

Yorktown Energy Partners VII, L.P. · CIK 0001423080 · Director · 10% owner

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 4,596,064

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, each common share representing limited partnership interests of AMGP was converted into one share of common stock of New AM.

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, each common share representing limited partnership interests of AMGP was converted into one share of common stock of New AM.

SEC source: 0000899243-19-007887 · doc4.xml · nonDerivative · entry 1

Yorktown Energy Partners VII, L.P. · CIK 0001423080 · Director · 10% 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, each common share representing limited partnership interests of AMGP was converted into one share of common stock of New AM.

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, each common share representing limited partnership interests of AMGP was converted into one share of common stock of New AM.

SEC source: 0000899243-19-007885 · doc4.xml · nonDerivative · entry 2

Yorktown VII Associates LLC · CIK 0001423201 · Director · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 4,596,064

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, each common share representing limited partnership interests of AMGP was converted into one share of common stock of New AM.

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, each common share representing limited partnership interests of AMGP was converted into one share of common stock of New AM.

F2 · ownership.nature: These securities are owned directly by Yorktown Energy Partners VII, L.P. ("Yorktown VII"). The Reporting Person is the sole general partner of Yorktown VII Company LP. Yorktown VII Company LP is the sole general partner of Yorktown VII.

F3 · ownership.nature: The Reporting Person disclaims beneficial ownership of these securities except to the extent of its pecuniary interest therein and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of the securities for Section 16 or any other purpose.

SEC source: 0000899243-19-007885 · doc4.xml · nonDerivative · entry 1

Yorktown VII Associates LLC · CIK 0001423201 · Director · 10% 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, each common share representing limited partnership interests of AMGP was converted into one share of common stock of New AM.

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, each common share representing limited partnership interests of AMGP was converted into one share of common stock of New AM.

F2 · ownership.nature: These securities are owned directly by Yorktown Energy Partners VII, L.P. ("Yorktown VII"). The Reporting Person is the sole general partner of Yorktown VII Company LP. Yorktown VII Company LP is the sole general partner of Yorktown VII.

F3 · ownership.nature: The Reporting Person disclaims beneficial ownership of these securities except to the extent of its pecuniary interest therein and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of the securities for Section 16 or any other purpose.

SEC source: 0000899243-19-007873 · doc4.xml · nonDerivative · entry 2

YORKTOWN ENERGY PARTNERS V LP · CIK 0001210407 · Director · 10% owner

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,875,502

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, each common share representing limited partnership interests of AMGP was converted into one share of common stock of New AM.

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, each common share representing limited partnership interests of AMGP was converted into one share of common stock of New AM.

SEC source: 0000899243-19-007873 · doc4.xml · nonDerivative · entry 1

YORKTOWN ENERGY PARTNERS V LP · CIK 0001210407 · Director · 10% 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, each common share representing limited partnership interests of AMGP was converted into one share of common stock of New AM.

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, each common share representing limited partnership interests of AMGP was converted into one share of common stock of New AM.

SEC source: 0000899243-19-007881 · doc4.xml · nonDerivative · entry 2

Yorktown V CO LLC · CIK 0001302152 · Director · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 1,875,502

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, each common share representing limited partnership interests of AMGP was converted into one share of common stock of New AM.

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, each common share representing limited partnership interests of AMGP was converted into one share of common stock of New AM.

F2 · ownership.nature: These securities are owned directly by Yorktown Energy Partners V, L.P. ("Yorktown V"). The Reporting Person is the sole general partner of Yorktown V.

F3 · ownership.nature: The Reporting Person disclaims beneficial ownership of these securities except to the extent of its pecuniary interest therein and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of the securities for Section 16 or any other purpose.

SEC source: 0000899243-19-007881 · doc4.xml · nonDerivative · entry 1

Yorktown V CO LLC · CIK 0001302152 · Director · 10% 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, each common share representing limited partnership interests of AMGP was converted into one share of common stock of New AM.

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, each common share representing limited partnership interests of AMGP was converted into one share of common stock of New AM.

F2 · ownership.nature: These securities are owned directly by Yorktown Energy Partners V, L.P. ("Yorktown V"). The Reporting Person is the sole general partner of Yorktown V.

F3 · ownership.nature: The Reporting Person disclaims beneficial ownership of these securities except to the extent of its pecuniary interest therein and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of the securities for Section 16 or any other purpose.

SEC source: 0000899243-19-007877 · doc4.xml · nonDerivative · entry 2

Yorktown Energy Partners VI LP · CIK 0001347504 · Director · 10% owner

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,970,846

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, each common share representing limited partnership interests of AMGP was converted into one share of common stock of New AM

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, each common share representing limited partnership interests of AMGP was converted into one share of common stock of New AM

SEC source: 0000899243-19-007877 · doc4.xml · nonDerivative · entry 1

Yorktown Energy Partners VI LP · CIK 0001347504 · Director · 10% 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, each common share representing limited partnership interests of AMGP was converted into one share of common stock of New AM

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, each common share representing limited partnership interests of AMGP was converted into one share of common stock of New AM

SEC source: 0000899243-19-007882 · doc4.xml · nonDerivative · entry 2

Yorktown VI Associates LLC · CIK 0001347608 · Director · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 1,970,846

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, each common share representing limited partnership interests of AMGP was converted into one share of common stock of New AM.

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, each common share representing limited partnership interests of AMGP was converted into one share of common stock of New AM.

F2 · ownership.nature: These securities are owned directly by Yorktown Energy Partners VI, L.P. ("Yorktown VI"). The Reporting Person is the sole general partner of Yorktown VI Company LP. Yorktown VI Company LP is the sole general partner of Yorktown VI.

F3 · ownership.nature: The Reporting Person disclaims beneficial ownership of these securities except to the extent of its pecuniary interest therein and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of the securities for Section 16 or any other purpose.

SEC source: 0000899243-19-007882 · doc4.xml · nonDerivative · entry 1

Yorktown VI Associates LLC · CIK 0001347608 · Director · 10% 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, each common share representing limited partnership interests of AMGP was converted into one share of common stock of New AM.

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, each common share representing limited partnership interests of AMGP was converted into one share of common stock of New AM.

F2 · ownership.nature: These securities are owned directly by Yorktown Energy Partners VI, L.P. ("Yorktown VI"). The Reporting Person is the sole general partner of Yorktown VI Company LP. Yorktown VI Company LP is the sole general partner of Yorktown VI.

F3 · ownership.nature: The Reporting Person disclaims beneficial ownership of these securities except to the extent of its pecuniary interest therein and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of the securities for Section 16 or any other purpose.

SEC source: 0001104659-19-019956 · a4a.xml · nonDerivative · entry 1

Kennedy Michael N. · CIK 0001477679 · See Remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 60,892

F1 · kind: Received in exchange for 20,256 common units representing limited partnership interests ("AMLP Common Units") of Antero Midstream Partners LP ("AMLP") pursuant to the Simplification Agreement (the "Simplification Agreement"), dated as of October 9, 2018, by and among the Issuer, AMLP and certain of their affiliates. Pursuant to the Simplification Agreement, holders of AMLP Common Units (other than Antero Resources Corporation) received, in exchange for each AMLP Common Unit held, (i) $3.415 in cash without interest and 1.6350 shares of common stock of the Issuer, (ii) 1.8926 shares of common stock of the Issuer, or (iii) $10.1364 in cash and 1.1279 shares of common stock of the Issuer.

F2 · shares: This amendment corrects the Reporting Person's Form 4 filed on March 14, 2019 (the "Original Filing"), to revise the row set forth above. In the Reporting Person's Original Filing, 22,846 shares of common stock of the Issuer were reported as acquired by the Reporting Person, rather than correctly stating that 33,118 shares of common stock of the Issuer were acquired by the Reporting Person. The number of shares included in column 5 of this amendment reflects the number of shares owned by the Reporting Person as a result of the transaction reported in this row. It does not give effect to transactions reported on any succeeding line in the Original Filing.

F1 · price: Received in exchange for 20,256 common units representing limited partnership interests ("AMLP Common Units") of Antero Midstream Partners LP ("AMLP") pursuant to the Simplification Agreement (the "Simplification Agreement"), dated as of October 9, 2018, by and among the Issuer, AMLP and certain of their affiliates. Pursuant to the Simplification Agreement, holders of AMLP Common Units (other than Antero Resources Corporation) received, in exchange for each AMLP Common Unit held, (i) $3.415 in cash without interest and 1.6350 shares of common stock of the Issuer, (ii) 1.8926 shares of common stock of the Issuer, or (iii) $10.1364 in cash and 1.1279 shares of common stock of the Issuer.

F2 · balance_after: This amendment corrects the Reporting Person's Form 4 filed on March 14, 2019 (the "Original Filing"), to revise the row set forth above. In the Reporting Person's Original Filing, 22,846 shares of common stock of the Issuer were reported as acquired by the Reporting Person, rather than correctly stating that 33,118 shares of common stock of the Issuer were acquired by the Reporting Person. The number of shares included in column 5 of this amendment reflects the number of shares owned by the Reporting Person as a result of the transaction reported in this row. It does not give effect to transactions reported on any succeeding line in the Original Filing.

SEC source: 0001104659-19-019957 · a4a.xml · nonDerivative · entry 1

Schopp Alvyn A. · CIK 0001586799 · See Remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,441,015

F1 · kind: Received in exchange for 38,856 common units representing limited partnership interests ("AMLP Common Units") of Antero Midstream Partners LP ("AMLP") pursuant to the Simplification Agreement (the "Simplification Agreement"), dated as of October 9, 2018, by and among the Issuer, AMLP and certain of their affiliates. Pursuant to the Simplification Agreement, holders of AMLP Common Units (other than Antero Resources Corporation) received, in exchange for each AMLP Common Unit held, (i) $3.415 in cash without interest and 1.6350 shares of common stock of the Issuer, (ii) 1.8926 shares of common stock of the Issuer, or (iii) $10.1364 in cash and 1.1279 shares of common stock of the Issuer.

F2 · shares: This amendment corrects the Reporting Person's Form 4 filed on March 14, 2019 (the "Original Filing"), to revise the row set forth above. In the Reporting Person's Original Filing, 43,825 shares of common stock of the Issuer were reported as acquired by the Reporting Person, rather than correctly stating that 46,869 shares of common stock of the Issuer were acquired by the Reporting Person. The number of shares included in column 5 of this amendment reflects the number of shares owned by the Reporting Person as a result of the transaction reported in this row. It does not give effect to transactions reported on any succeeding line in the Original Filing.

F1 · price: Received in exchange for 38,856 common units representing limited partnership interests ("AMLP Common Units") of Antero Midstream Partners LP ("AMLP") pursuant to the Simplification Agreement (the "Simplification Agreement"), dated as of October 9, 2018, by and among the Issuer, AMLP and certain of their affiliates. Pursuant to the Simplification Agreement, holders of AMLP Common Units (other than Antero Resources Corporation) received, in exchange for each AMLP Common Unit held, (i) $3.415 in cash without interest and 1.6350 shares of common stock of the Issuer, (ii) 1.8926 shares of common stock of the Issuer, or (iii) $10.1364 in cash and 1.1279 shares of common stock of the Issuer.

F2 · balance_after: This amendment corrects the Reporting Person's Form 4 filed on March 14, 2019 (the "Original Filing"), to revise the row set forth above. In the Reporting Person's Original Filing, 43,825 shares of common stock of the Issuer were reported as acquired by the Reporting Person, rather than correctly stating that 46,869 shares of common stock of the Issuer were acquired by the Reporting Person. The number of shares included in column 5 of this amendment reflects the number of shares owned by the Reporting Person as a result of the transaction reported in this row. It does not give effect to transactions reported on any succeeding line in the Original Filing.

SEC source: 0001104659-19-028704 · a4a.xml · nonDerivative · entry 1

KAGAN PETER · CIK 0001239315 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 33,481

F1 · kind: The Reporting Person received 17,669 shares of common stock of the Issuer ("New AM Common Shares") in exchange for 15,666 units representing limited partnership interests ("AM Common Units") of Antero Midstream Partners LP ("AM") pursuant to the Simplification Agreement (the "Simplification Agreement"), dated as of October 9, 2018, by and among Antero Midstream GP LP, AM and certain of their affiliates. Pursuant to the Simplification Agreement, holders of AM Common Units (other than Antero Resources Corporation) received, in exchange for each AM Common Unit held, (i) $3.415 in cash without interest and 1.6350 New AM Common Shares, (ii) 1.8926 shares New AM Common Shares, or (iii) $10.1364 in cash and 1.1279 New AM Common Shares.

F2 · shares: This amendment corrects the Reporting Person's Form 4 filed on March 14, 2019 (the "Original Filing"), to add the row set forth above. The number of shares included in column 5 of this amendment reflects the number of shares owned by the Reporting Person as a result of all of the transactions reported in the Original Filing with respect to the New AM Common Shares directly held by him.

F1 · price: The Reporting Person received 17,669 shares of common stock of the Issuer ("New AM Common Shares") in exchange for 15,666 units representing limited partnership interests ("AM Common Units") of Antero Midstream Partners LP ("AM") pursuant to the Simplification Agreement (the "Simplification Agreement"), dated as of October 9, 2018, by and among Antero Midstream GP LP, AM and certain of their affiliates. Pursuant to the Simplification Agreement, holders of AM Common Units (other than Antero Resources Corporation) received, in exchange for each AM Common Unit held, (i) $3.415 in cash without interest and 1.6350 New AM Common Shares, (ii) 1.8926 shares New AM Common Shares, or (iii) $10.1364 in cash and 1.1279 New AM Common Shares.

F2 · balance_after: This amendment corrects the Reporting Person's Form 4 filed on March 14, 2019 (the "Original Filing"), to add the row set forth above. The number of shares included in column 5 of this amendment reflects the number of shares owned by the Reporting Person as a result of all of the transactions reported in the Original Filing with respect to the New AM Common Shares directly held by him.

SEC source: 0001104659-19-000869 · a4.xml · nonDerivative · entry 1

DEA PETER A · CIK 0001132295 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 4,486

SEC source: 0001104659-19-000870 · a4.xml · nonDerivative · entry 1

KAGAN PETER · CIK 0001239315 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 15,812

SEC source: 0001104659-19-000872 · a4.xml · nonDerivative · entry 1

KLIMLEY BROOKS J · CIK 0001235158 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 9,619

SEC source: 0001104659-19-000874 · a4.xml · nonDerivative · entry 1

ROBESON ROSE M · CIK 0001251678 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 9,619

SEC source: 0001104659-19-000871 · a4.xml · nonDerivative · entry 1

Keenan W Howard JR · CIK 0001370287 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 9,619