SCHEDULE 13D/A 0001015878 XXXXXXXX LIVE 1 Common Stock (par value $0.10 per share) 01/13/2026 false 0000056868 74158E104 PrimeEnergy Resources Corporation

9821 Katy Freeway Houston TX 77024

Robert de Rothschild (917) 981-7325 224 Bahama Lane Palm Beach FL 33480 0001015878 N de Rothschild Robert WC I0 0 201906 0 201906 201906 N 12.4 IN Totals reflect Reporting Person's holdings as of January 30, 2026. The percentage ownership was calculated based on 1,635,000 outstanding shares as of November 12, 2025. Y Amrace Inc. WC X1 0 201906 0 201906 201906 N 12.4 CO Totals reflect Reporting Person's holdings as of January 30, 2026. The percentage ownership was calculated based on 1,635,000 outstanding shares as of November 12, 2025. Common Stock (par value $0.10 per share) PrimeEnergy Resources Corporation 9821 Katy Freeway Houston TX 77024 i) Robert de Rothschild ("Reporting Person") ii) Amrace Inc. ("Amrace") 224 Bahama Lane Palm Beach, FL 33480 The Reporting Person is an individual engaged in the business of private investing. Amrace is a Delaware corporation engaged in the business of private investing. Neither the Reporting Person nor Amrace have, during the last five years, been convicted in a criminal proceeding (excluding traffic violations or similar misdemeanors). Neither the Reporting Person nor Amrace have, during the last five years, been a party to a civil proeeding of a judicial or administrativebody of competent jurisdiction as a result of which the Reporting Person or Amrace was or is subject to a judgment, decree or final order enjoining future violations of, or prohibiting or mandating activities subject to, federal or state securities laws or finding any violation withrespect to such laws. i) France ii) Delaware WC Since the date of the most recent Schedule 13D amendment filed by Amrace and the Reporting Person, Amrace has sold the following PNRG shares in the ordinary course of business: February 3, 2025 Sale of 471 Shares at $212.00 February 5, 2025 Sale of 503 Shares at an average weighted price of $215.179 (range of $215.00 to $216.205) February 6, 2025 Sale of 1,354 Shares at an average weighted price of $204.5722 (range of $201.95 to $207.46) February 7, 2025 Sale of 1,615 Shares at an average weighted price of $202.1421 (range of $197.15 to $205.00) February 10, 2025 Sale of 1,337 Shares at an average weighted price of $203.9193 (range of $201.56 to $205.92) February 11, 2025 Sale of 4,387 Shares at an average weighted price of $201.5392 (range of $193.78 to $205.15) February 12, 2025 Sale of 1,970 Shares at an average weighted price of $197.305 (range of $104.08 to $199.85) February 19, 2025 Sale of 3,904 Shares at an average weighted price of $201.28 (range of $200.00 to $207.19) February 21, 2025 Sale of 1,017 Shares at an average weighted price of $195.2932 (range of $192.13 to $197.21) June 3, 2025 Sale of 4,389 Shares at an average weighted price of $188.0117 (range of $186.00 to $189.45) June 4, 2025 Sale of 1,767 Shares at $187.00 January 13, 2026 Sale of 8,700 Shares at an average weighted price of $182.848 (range of $178.945 to $185.75) January 29, 2026 Sale of 10,151 Shares at an average weighted price of $186.19 (range of $183.015 to $187.21) January 30, 2026 Sale of 10,001 Shares at an average weighted price of $181.81 (range of $181.00 to $184.06) As of January 13, 2026 - 222,057 Shares at 13.6% As of January 30, 2026 - 201,906 Shares at 12.4% Percentages based on 1,635,000 outstanding shares of Isser as of November 12, 2025 (pursuant to 10-Q filed with the Securities and Exchange Commission on November 19, 2025) See Cover Page Shares were sold from February 3, 2025, through January 30, 2026, in the ordinary course of business See Item 2(a) Not applicable Not applicable Not applicable de Rothschild Robert /s/ Robert de Rothschild 02/02/2026 Amrace Inc. /s/ Robert de Rothschlid 02/02/2026