SCHEDULE 13D/A 0002048199 XXXXXXXX LIVE 1 Common Shares, par value $0.001 09/18/2025 false 0001464591 G38327105 GeoPark Ltd

CALLE 94 NO. 11-30 8 PISO BOGOTA F8 00000

Maria Carolina Sigwald 54-11-4344-6000 Maipu 1 Buenos Aires C1 1084 0001469395 N Pampa Energy Inc. OO N C1 2285195.00 00000.00 2285195.00 00000.00 2285195.00 N 4.43 CO HC 0002048199 N Generation Argentina Inc OO N C1 2285195.00 00000.00 2285195.00 00000.00 2285195.00 N 4.43 CO Common Shares, par value $0.001 GeoPark Ltd CALLE 94 NO. 11-30 8 PISO BOGOTA F8 00000 This Amendment No. 1 amends and supplements the Schedule 13D previously filed with the U.S. Securities and Exchange Commission (the "SEC") on May 22, 2025 (as amended from time to time, the "Schedule 13D"), with respect to the common stock, $0.001 par value per share (the "Shares") of GeoPark Limited, an exempted company incorporated under the laws of Bermuda ("GeoPark Limited" or the "Issuer"), which are listed on the New York Stock Exchange (the "NYSE"). The principal executive offices of GeoPark Limited are located at Calle 94 N(degree) 11-30 8(degree) piso, Bogota, Colombia. Unless otherwise stated herein, the Schedule 13D remains in full force and effect. Capitalized terms used in this Amendment No. 1 and not otherwise defined shall have the same meanings ascribed to them in the original Schedule 13D. No material changes to Schedule 13D. No material changes to Schedule 13D. No material changes to Schedule 13D. GASA directly owns the Reported Securities. GASA is a wholly-owned subsidiary of Pampa Energia. Therefore, each of the Reporting Persons is deemed to have, as of the date hereof, the following interest in the Reported Securities: Shares Owned: 2,285,195 % of Class(1): 4.43% Sole Power to Vote: 2,285,195 Shared Power to Vote: 0 Sole Power to Dispose: 2,285,195 Shared Power to Dispose: 0 (1) Calculated based on 51,567,663 shares outstanding as of the last 6-K filing of the Issuer published on August 5, 2025. Since the last publication of the 13D form, Geopark Limited has increased its share capital from 51,247,287 to 51,567,663. GASA directly owns the Reported Securities. GASA is a wholly-owned subsidiary of Pampa Energia. Therefore, each of the Reporting Persons is deemed to have, as of the date hereof, the following interest in the Reported Securities: Shares Owned: 2,285,195 % of Class(1): 4.43% Sole Power to Vote: 2,285,195 Shared Power to Vote: 0 Sole Power to Dispose: 2,285,195 Shared Power to Dispose: 0 (1) Calculated based on 51,567,663 shares outstanding as of the last 6-K filing of the Issuer published on August 5, 2025. Since the last publication of the 13D form, Geopark Limited has increased its share capital from 51,247,287 to 51,567,663. During the past sixty days, GASA has made the following open market transactions on the NYSE regarding the Issuer's Shares: On September 15, 2025, GASA sold 60,911 Shares at US$ 6.31560 per Share through an open market transaction, totaling US$ 384,689.51. On September 16, 2025, GASA sold 1,044,332 Shares at US$ 6.47561 per Share through an open market transaction, totaling US$ 6,762,686.74. On September 17, 2025, GASA sold 1,009,500 Shares at US$ 6.53300 per Share through an open market transaction, totaling US$ 6,595,063.50. On September 18, 2025, GASA sold 810,208 Shares at US$ 6.32188 per Share through an open market transaction, totaling US$ 5,122,036.94. Not applicable. Not applicable. No material changes to Schedule 13D. Not applicable. Pampa Energy Inc. Gustavo Mariani 09/18/2025 Generation Argentina Inc Gustavo Mariani 09/18/2025