X0202 SCHEDULE 13D/A 0001437749-24-002788 0001018124 XXXXXXXX LIVE 1 Common Stock, $0.10 par value 04/22/2026 false 0000056868 74158E104 PRIMEENERGY RESOURCES CORP

9821 KATY FREEWAY HOUSTON TX 77024

Gifford Fong 925-299-7800 3658 Mt. Diablo Boulevard, Suite 200 Lafayette CA 94549 0001018124 N FONG GIFFORD OO N X1 54364.00 0.00 54364.00 0.00 54364.00 N 3.4 IN (1) Based on 1,618,000 shares of Common Stock outstanding as of April 10, 2026, as disclosed in the Issuer's Annual Report on Form 10-K for the year ended December 31, 2025. Common Stock, $0.10 par value PRIMEENERGY RESOURCES CORP 9821 KATY FREEWAY HOUSTON TX 77024 Gifford Fong Gifford Fong 3658 Mt. Diablo Boulevard, Suite 200 Lafayette, CA 94549 Mr. Fong is a member of the Board of Directors of the Issuer. Mr. Fong has not, during the past five years, been convicted in a criminal proceeding (excluding traffic violations or similar misdemeanors). Mr. Fong has not, during the past five years, been a party to a civil proceeding of a judicial or administrative body of competent jurisdiction and as a result of such proceeding was or is subject to a judgment, decree or final order enjoining further violations of, or prohibiting or mandating activities subject to, federal or state securities laws or finding any violation with respect to such laws. United States. Not applicable. No Shares were bought or sold by Mr. Fong. As previously reported, Mr. Fong had sole voting power over (i) 38,994 Shares pursuant to a Voting Agreement, dated June 3, 2023, between Mr. Fong and Steven Fong, who was the record holder of such Shares, and (ii) 18,758 Shares pursuant to a Voting Agreement, dated June 3, 2023, between Mr. Fong and Timothy Fong, who was the record holder of such Shares (collectively, the "Voting Agreements" and each, a "Voting Agreement"). Mr. Fong has no dispositive power over nor any pecuniary interest in the Shares held by Steven Fong and Timothy Fong. This Amendment No. 1 is being filed solely to report a decrease in his beneficial ownership due to the termination of both Voting Agreements on April 22, 2026. Mr. Fong no longer has voting power or beneficial ownership of the Shares held by Steven Fong and Timothy Fong. As a result, Mr. Fong is no longer the beneficial owner of more than 5% of the outstanding Shares. The filing of this Amendment No. 1 represents the final amendment to this Schedule 13D and constitutes an exit filing for Mr. Fong. Mr. Fong has no current plans or proposals which relate to or would result in: (a) the acquisition by any person of additional securities of the Issuer, or the disposition of securities of the Issuer; (b) an extraordinary corporate transaction, such as a merger, reorganization or liquidation, involving the Issuer or any of its subsidiaries; (c) a sale or transfer of a material amount of assets of the Issuer or any of its subsidiaries; (d) any change in the present board of directors or management of the Issuer, including any plans or proposals to change the number or term of directors or to fill any existing vacancies on the board; (e) any material change in the present capitalization or dividend policy of the Issuer; (f) any other material change in the Issuer's business or corporate structure; (g) changes in the Issuer's charter, bylaws or instruments corresponding thereto or other actions which may impede the acquisition of control of the Issuer by any person; (h) causing a class of securities of the Issuer to be delisted from a national securities exchange or to cease to be authorized to be quoted in an inter-dealer quotation system of a registered national securities association; (i) a class of equity securities of the Issuer becoming eligible for termination of registration pursuant to Section 12(g)(4) of the Securities Exchange Act of 1934, as amended; or (j) any action similar to any of those enumerated above. Mr. Fong is the beneficial owner of 54,364 Shares held directly by Mr. Fong, with sole voting and dispositive power. Based on 1,618,000 Shares outstanding as of April 10, 2026, as disclosed in the Issuer's Annual Report on Form 10-K for the year ended December 31, 2025, Mr. Fong is the beneficial owner of approximately 3.4% of the Issuer's outstanding Shares. Mr. Fong is the beneficial owner of 54,364 Shares held directly by Mr. Fong, with sole voting and dispositive power. Based on 1,618,000 Shares outstanding as of April 10, 2026, as disclosed in the Issuer's Annual Report on Form 10-K for the year ended December 31, 2025, Mr. Fong is the beneficial owner of approximately 3.4% of the Issuer's outstanding Shares. Mr. Fong did not buy or sell any Shares in the sixty days prior to the filing of this Statement. Mr. Fong, Steven Fong and Timothy Fong terminated their respective Voting Agreement on April 22, 2026. None. Not applicable. None. None. FONG GIFFORD /s/ Gifford Fong 04/22/2026