Sec Form 4/A Filing - KAGAN PETER @ Antero Midstream Corp - 2019-03-12

FORM 4/A 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 KAGAN PETER 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 _____ 10% Owner _____ Officer (give title below) _____ Other (specify below) (Last) (First) (Middle) C/O WARBURG PINCUS & CO., 450 LEXINGTON AVENUE 3. Date of Earliest Transaction (MM/DD/YY) 03/12/2019 (Street) NEW YORK, NY10017 4. If Amendment, Date Original Filed (MM/DD/YY) 03/14/2019 6. Individual or Joint/Group Filing (Check Applicable Line) __ X __ Form filed by One Reporting Person _____ 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 03/12/2019 A( 1 ) 17,669 ( 2 ) A 33,481 ( 2 ) D

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 KAGAN PETER C/O WARBURG PINCUS & CO. 450 LEXINGTON AVENUE NEW YORK, NY10017 X Signatures /s/ Robert B. Knauss, By: Robert B. Knauss, Attorney-In-Fact for Peter R. Kagan 05/10/2019 Signature of Reporting Person Date

Explanation of Responses:

( 1 )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. ( 2 )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.

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).

** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).

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