Northern Oil and Gas, Inc.

of Northern’s Current Report on Form 8-K filed with the SEC on December 8, 2025 is incorporated herein by reference. Item 1.01 Entry Into a Material Definitive

. Item 2.03 Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant. The information set forth in Item

. Item 7.01 Regulation FD Disclosure. On February 23, 2026, Northern issued a press release announcing the closing of the Antero Acquisitions. A copy of the pre

, including Exhibit 99.1, shall not be deemed “filed” for any purpose, including for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (

Financial Statements and Exhibits. (d) Exhibits. Exhibit Number Description 2.1* Purchase and Sale Agreement, dated as of December 5, 2025, by and among Antero