of Form 8-K and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to liabilities of that section, and is not incorporated by reference into any filing under the Securities Act of 1933, as amended, or the Exchange Act unless specifically identified therein as being incorporated therein by reference.

of Form 8-K and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to liabilities of that section, and is not incorporated by reference into any filing under the Securities Act of 1933, as amended, or the Exchange Act unless specifically identified therein as being incorporated therein by reference.

Regulation FD Disclosure. On February 23, 2026, certain of Antero Midstream Corporation’s wholly-owned subsidiaries completed the previously announced sale of substantially all of their Utica Shale midstream assets to an affiliate of Infinity Natural Resources, Inc. and Northern Oil and Gas, Inc. (“NOG”) for aggregate cash consideration of $400 million, subject to customary post-closing adjustments, adjustments for the effective date of the transaction and other items, as contemplated by the…

Results of Operations and Financial Condition On February 11, 2026, Antero Midstream Corporation issued a press release, a copy of which is attached hereto as Exhibit 99.1 and incorporated by reference herein, announcing its financial and operational results for the quarter and year ended December 31, 2025. The information in this Current Report, including Exhibit 99.1, is being furnished pursuant to

Completion of Acquisition or Disposition of Assets. The information contained in the Introductory Note is incorporated by reference into this

Creation of a Direct Financial Obligation under an Off-Balance Sheet Arrangement of a Registrant. On December 23, 2025, Antero Midstream Corporation’s (the “Company”) indirect, wholly owned subsidiaries, Antero Midstream Partners LP (“Antero Midstream Partners”) and Antero Midstream Finance Corporation (“Finance Corp.” and together with Antero Midstream Partners, the “Issuers”) completed the previously announced private placement (the “Offering”) of $600.0 million in aggregate principal amoun…

Other Events. On December 9, 2025, Antero Midstream Corporation (the “Company”) issued a press release, a copy of which is attached hereto as Exhibit 99.1 and incorporated herein by reference, announcing the pricing of the previously announced private placement (the “Offering”) of $600.0 million in aggregate principal amount of the Company’s indirect, wholly owned subsidiaries, Antero Midstream Partners LP (“Antero Midstream Partners”) and Antero Midstream Finance Corporation’s 5.750% Senior…

Other Events. On December 9, 2025, Antero Midstream Corporation (the “Company”) issued a press release, a copy of which is attached hereto as Exhibit 99.1 and incorporated herein by reference, announcing that the Company’s indirect, wholly owned subsidiaries, Antero Midstream Partners LP (“Antero Midstream Partners”) and Antero Midstream Finance Corporation (“Finance Corp” and, together with Antero Midstream Partners, the “Issuers”), intend to commence a private offering (the “Notes Offering”…

Entry Into a Material Definitive Agreement HG Acquisition On December 5, 2025, Antero Midstream Partners LP (“Antero Midstream Partners”), an indirect, wholly-owned subsidiary of Antero Midstream Corporation (the “Company”), entered into a Membership Interest Purchase Agreement (the “Purchase Agreement”) to purchase 100% of the issued and outstanding equity interests of HG Energy II Midstream Holdings, LLC (“HG Midstream”) from HG Energy II LLC (“HG Energy”) for cash consideration of $1.1 bil…

shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liabilities of that section, nor shall such information be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, regardless of any general incorporation language in such filing, except as shall be expressly set forth by specific reference in such filing. Forward-Looking Statements This Form 8-K contains forward-looking st…

of Form 8-K and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to liabilities of that section, and is not incorporated by reference into any filing under the Securities Act of 1933, as amended, or the Exchange Act unless specifically identified therein as being incorporated therein by reference.

CEO — Michael N. Kennedy: The filing primarily discloses compensation adjustments and the adoption of a severance plan resulting from previously disclosed management changes, rather than reporting a new departure or appointment event.

Creation of a Direct Financial Obligation under an Off-Balance Sheet Arrangement of a Registrant. On September 22, 2025, Antero Midstream Corporation’s (the “Company”) indirect, wholly owned subsidiaries, Antero Midstream Partners LP (“Antero Midstream Partners”) and Antero Midstream Finance Corporation (“Finance Corp.” and together with Antero Midstream Partners, the “Issuers”) completed the previously announced private placement (the “Offering”) of $650,000,000 in aggregate principal amount…

Other Events. On September 8, 2025, Antero Midstream Corporation (the “Company”) issued a press release, a copy of which is attached hereto as Exhibit 99.1 and incorporated herein by reference, announcing the pricing of the previously announced private placement (the “Offering”) of $650.0 million in aggregate principal amount of the Company’s indirect, wholly owned subsidiaries, Antero Midstream Partners LP and Antero Midstream Finance Corporation’s 5.750% Senior Notes due 2033 (the “Notes”).…

Other Events. On September 8, 2025, Antero Midstream Corporation (the “Company”) issued a press release, a copy of which is attached hereto as Exhibit 99.1 and incorporated herein by reference, announcing that the Company’s indirect, wholly owned subsidiaries, Antero Midstream Partners LP (“Antero Midstream Partners”) and Antero Midstream Finance Corporation (“Finance Corp” and, together with Antero Midstream Partners, the “Issuers”), intend to commence a private offering (the “Notes Offering…

CEO — Paul M. Rady: The CEO is transitioning to Chairman Emeritus for personal reasons with a named internal successor (CFO Michael N. Kennedy) already in place, indicating an orderly succession rather than a sudden loss of leadership.

of Form 8-K and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to liabilities of that section, and is not incorporated by reference into any filing under the Securities Act of 1933, as amended, or the Exchange Act unless specifically identified therein as being incorporated therein by reference.

of Form 8-K and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to liabilities of that section, and is not incorporated by reference into any filing under the Securities Act of 1933, as amended, or the Exchange Act unless specifically identified therein as being incorporated therein by reference.

Results of Operations and Financial Condition On February 12, 2025, Antero Midstream Corporation issued a press release, a copy of which is attached hereto as Exhibit 99.1 and incorporated by reference herein, announcing its financial and operational results for the quarter and year ended December 31, 2024. The information in this Current Report, including Exhibit 99.1, is being furnished pursuant to

Regulation FD Disclosure. On January 14, 2025, Antero Midstream Corporation (the “Company”) issued a press release announcing that its board of directors declared a cash dividend of $0.225 per share for the quarter ended December 31, 2024, which will be payable on February 12, 2025 to stockholders of record as of January 29, 2025. The Company also provided an update regarding its share repurchase activity during the quarter ended December 31, 2024. A copy of the press release is attached here…

of Form 8-K and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to liabilities of that section, and is not incorporated by reference into any filing under the Securities Act of 1933, as amended, or the Exchange Act unless specifically identified therein as being incorporated therein by reference.

of Form 8-K and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to liabilities of that section, and is not incorporated by reference into any filing under the Securities Act of 1933, as amended, or the Exchange Act unless specifically identified therein as being incorporated therein by reference.

The filing describes the approval of an amended long-term incentive plan to increase share availability, which is a compensatory arrangement rather than a change in management personnel.

of Form 8-K and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to liabilities of that section, and is not incorporated by reference into any filing under the Securities Act of 1933, as amended, or the Exchange Act unless specifically identified therein as being incorporated therein by reference.