X0306 4 2020-09-14 0 0001623925 Antero Midstream Corp AM 0001234637 RADY PAUL M 1615 WYNKOOP STREET DENVER CO 80202 1 1 0 0 Chief Executive Officer Common stock, par value $0.01 per share 2020-09-14 4 S 0 8600000 5.40 D 1442017 D Common stock, par value $0.01 per share 1180821 I See Footnote This transaction was undertaken by the Reporting Person for the purpose of funding pre-existing charitable commitments. Includes 461,090 shares of common stock of the Issuer ("Common Stock") subject to previously granted restricted stock unit awards that remain subject to vesting. Represents shares of Common Stock held by Mockingbird Investment, LLC ("Mockingbird"). The Reporting Person owns a 3.68% limited liability company interest in Mockingbird, and a trust under his control owns the remaining 96.32%. The Reporting Person disclaims beneficial ownership of all shares of Common Stock held by Mockingbird except to the extent of his pecuniary interest therein. /s/ Alvyn A. Schopp, as attorney-in-fact for Paul M. Rady 2020-09-15