Entry into a Material Definitive Agreement On August 3, 2026, PrimeEnergy Resources Corporation, (The Company), amended its borrowing base agreement with Citibank, N.A., decreasing the borrowing base from $115,000,000 to $105,000,000. As of March 31, 2026, the Company had no outstanding borrowings under the credit facility. Currently, through the date of this reported filing, the Company continues to have no outstanding borrowings under the credit facility.

Other Events On June 10, 2026, the Board of Directors of the Company authorized the repurchase of up to an additional 300,000 shares of the Company's common stock. Repurchases may be made from time to time in open-market transactions or privately negotiated transactions, at such prices and in such amounts as management deems appropriate, subject to prevailing market conditions and the Company's cash availability. SIGNATURES Pursuant to the requirements of Section 12 of the Securities Exchange…

Entry into a Material Definitive Agreement. On February 24, 2026, PrimeEnergy Resources Corporation (the “Company”), as borrower, entered into a Fifth Amendment (the “Amendment”) to its Fourth Amended and Restated Credit Agreement, dated as of July 5, 2022 (as previously amended, the “Credit Agreement”), with Citibank, N.A., as administrative agent, and the lenders party thereto. The Amendment modifies certain terms of the Company’s senior secured revolving credit facility and constitutes the…

Changes in Registrant’s Certifying Accountant (a) June 27, 2025, the Audit Committee (the “Committee”) of the Board of Directors of PrimeEnergy Resources Corporation (the “Company”), approved the dismissal of Grassi & Co., CPAs, P.C. (“Grassi”) as the Company’s independent registered public accounting firm. On June 27, 2025 (the “Dismissal Date”), the Company notified Grassi of its dismissal effective immediately. Grassi’s reports on the Company’s consolidated financial statements as of and f…

Entry into a Material Definitive Agreement On July 29, 2024, PrimeEnergy Resources Corporation, (The Company), amended its loan agreement with Citibank, N.A., increasing the borrowing base from $85,000,000 to $115,000,000. As of today, the Company currently has $8,000,000 outstanding borrowings under the facility, however, the Company does plan to draw down part of the loan and use its cash flow to fund its drilling budget for 2024. The loan amendment also includes the addition of U.S. Bank N…

Entry into a Material Definitive Agreement On February 9, 2024, PrimeEnergy Resources Corporation, (The Company), amended its loan agreement with Citibank, N.A., increasing the borrowing base from $65,000,000 to $85,000,000, as well as adding Independent Bank as a new lender. As of today, the Company has no outstanding borrowings under the facility, however, the Company does plan to draw down part of the loan and use its cash flow to fund its drilling budget for 2024. The above description of…

Entry into a Material Definitive Agreement On February 11, 2021, PrimeEnergy Resources Corporation and its subsidiaries, Prime Operating Company, Eastern Oil Well Services Company, and EOWS Midland Company (collectively the “Company”), as the debtors and BBVA USA (as lender, Administrative Agent and Issuing Bank), Citbank, N.A. and Fifth Third, National Association, as lenders (collectively, the “Lenders”) entered into the Sixth Amendment to the Third Amended and Restated Credit Agreement (th…

Item 9. EXHIBITS AND FINANCIAL STATEMENT SCHEDULES. The following documents are filed as part of this Report: 10.22.5.10.6 SIXTH AMENDMENT TO THIRD AMENDED AND RESTATED CREDIT AGREEMENT dated as of FEBRUARY 11, 2021, among PRIMEENERGY RESOURCES CORPORATION, as Borrower, THE GUARANTORS PARTY HERETO, THE LENDERS PARTY, HERETO, BBVA USA, as Administrative Agent and BBVA USA, as Sole Lead Arranger and Sole Book Runner (Filed herewith). SIGNATURES Pursuant to the requirements of Section 12 of the…

Director — Mr. Jan K. Smeets: Mr. Jan K. Smeets will not stand for re-election as a director due to personal circumstances.

Member of the Audit Committee — Clint Hurt: Clint Hurt was appointed to the Audit Committee.

Director — Mr. Gaines Wehrle: Mr. Gaines Wehrle resigned as a director due to personal circumstances.