Sec Form 4 Filing - Warburg Pincus Private Equity X O&G, L.P. @ Antero Midstream Corp - 2019-11-12

FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person Warburg Pincus Private Equity X O&G, L.P. 2. Issuer Name and Ticker or Trading Symbol Antero Midstream Corp [ AM] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) X __ Director X __ 10% Owner _____ Officer (give title below) _____ Other (specify below) (Last) (First) (Middle) C/O WARBURG PINCUS LLC, 450 LEXINGTON AVENUE 3. Date of Earliest Transaction (MM/DD/YY) 11/12/2019 (Street) NEW YORK, NY10017 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) _____ Form filed by One Reporting Person __ X __ Form filed by More than One Reporting Person (City) (State) (Zip)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Common stock, par value $0.01 per share 11/12/2019 S 22,253,508 D $ 6.52 0 D ( 1 ) ( 2 ) ( 3 ) ( 4 ) ( 5 ) ( 6 ) Common stock, par value $0.01 per share 11/12/2019 S 711,929 D $ 6.52 0 I See Footnote ( 1 ) ( 2 ) ( 3 ) ( 4 ) ( 5 ) ( 6 ) Common stock, par value $0.01 per share 11/12/2019 S 22,965,437 D $ 6.52 0 I See Footnote ( 1 ) ( 2 ) ( 3 ) ( 4 ) ( 5 ) ( 6 )

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities) 1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5) 6. Date Exercisable and Expiration Date (MM/DD/YY) 7. Title and Amount of Underlying Securities (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4) Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Warburg Pincus Private Equity X O&G, L.P. C/O WARBURG PINCUS LLC 450 LEXINGTON AVENUE NEW YORK, NY10017 X X Warburg Pincus X, L.P. C/O WARBURG PINCUS LLC 450 LEXINGTON AVENUE NEW YORK, NY10017 X X Warburg Pincus X GP L.P. C/O WARBURG PINCUS LLC 450 LEXINGTON AVENUE NEW YORK, NY10017 X X WPP GP LLC C/O WARBURG PINCUS LLC 450 LEXINGTON AVENUE NEW YORK, NY10017 X X Warburg Pincus Partners, L.P. C/O WARBURG PINCUS LLC 450 LEXINGTON AVENUE NEW YORK, NY10017 X X Warburg Pincus Partners GP LLC C/O WARBURG PINCUS LLC 450 LEXINGTON AVENUE NEW YORK, NY10017 X X WARBURG PINCUS & CO. C/O WARBURG PINCUS LLC 450 LEXINGTON AVENUE NEW YORK,, NY10017 X X WARBURG PINCUS LLC C/O WARBURG PINCUS & CO. 450 LEXINGTON AVENUE NEW YORK, NY10017 X X KAYE CHARLES R C/O WARBURG PINCUS & CO. 450 LEXINGTON AVENUE NEW YORK, NY10017 X X Landy Joseph P. C/O WARBURG PINCUS & CO. 450 LEXINGTON AVENUE NEW YORK, NY10017 X X Signatures /s/ Robert B. Knauss 11/13/2019 Signature of Reporting Person Date

Explanation of Responses:

( 1 )On November 12, 2019, Warburg Pincus Private Equity X O&G, L.P., a Delaware limited partnership ("WP X O&G"), sold 22,253,508 shares of common stock, par value $0.01 per share ("Common Stock"), of Antero Midstream Corporation (the "Issuer"), and WP X O&G's affiliated partnership, 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"), sold 711,929 shares of Common Stock of the Issuer (collectively, the "Sale"). ( 2 )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 WP X GP. 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. ( 3 )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. ( 4 )The WP X O&G Funds, 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. ( 5 )By reason of the provisions of Rule 16a-1 of the Securities Exchange Act of 1934, as amended (the "Exchange Act"), 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 have been deemed to be beneficial owners of the Common Stock of the Issuer held collectively by the WP X O&G Funds. ( 6 )(Continued from Footnote 5) The Warburg Pincus Entities, Messrs. Kaye and Landy and such affiliates disclaim beneficial ownership of the Common Stock of Issuer except to the extent of their pecuniary interest therein. Prior to the Sale, each of WP X O&G, WP X GP, WP X GP LP, WPP GP, WP Partners, WP Partners GP, WP and WP LLC were a director-by-deputization solely for purposes of Section 16 of the Exchange Act.

Remarks: Exhibit 99.1 - Joint Filers' Signatures

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