UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2023 or TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES ☐ EXCHANGE ACT OF 1934 Commission File No. 001-38075 ANTERO MIDSTREAM CORPORATION (Exact name of registrant as specified in its charter) Delaware 61-1748605 (State or other juri sdiction of (IRS Employe r incorporation or organi ...