GeoPark Ltd

REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16

UNDER THE SECURITIES EXCHANGE ACT OF 1934

Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F:

1. Press Release dated October 21, 2026 titled "Geopark Limited Prices Offering of U.S.$550,000,000 9.500% Senior Notes due 2033"

Bogotá, Colombia, October 21, 2026 - GeoPark Limited ("GeoPark"or the"Company") (NYSE: GPRK), an exempted company incorporated under the laws of Bermuda, today announced the pricing of U.S.$550,000,000 aggregate principal amount of 9.500% senior notes due 2033 (the "Notes"). The Notes were offered in a private placement to qualified institutional buyers in accordance with Rule 144A under the Securities Act of 1933, as amended (the "Securities Act"), and outside the United States to non-U.S. persons in accordance with Regulation S under the Securities Act. The Notes will be fully and unconditionally guaranteed jointly and severally by GeoPark Colombia S.L.U., GeoPark Colombia S.A.S., and GeoPark Argentina S.A. The settlement of the Notes offering is expected to take place on October 28, 2026, subject to customary closing conditions.

The net proceeds from the Notes offering will be used by the Company to repurchase the Company's outstanding 8.750% senior notes due 2030 (the "2030 Notes") through a concurrent tender offer, to repay or redeem, in whole or in part, certain of its existing indebtedness, including the Company's outstanding 5.500% senior notes due 2027, to fund capital expenditures related to the development of its Vaca Muerta assets over the next 18 months, and for general corporate purposes.

This press release does not constitute an offer to sell or a solicitation of an offer to buy these securities, nor will there be any sale of these securities, in any state or jurisdiction in which such offer, solicitation or sale would be unlawful prior to registration or qualification under the securities laws of any state or jurisdiction. The Notes have not been registered under the Securities Act, or any applicable state securities laws, and will be offered only to qualified institutional buyers pursuant to Rule 144A promulgated under the Securities Act and outside the United States to non-U.S. persons in accordance with Regulation S under the Securities Act. Unless so registered, the Notes may not be offered or sold in the United States except pursuant to an exemption from the registration requirements of the Securities Act and any applicable state securities laws.

For further information, please contact:

Shareholder Value and Capital Markets Director

Communications Department communications@geo-park.com

CAUTIONARY STATEMENT ON FORWARD-LOOKING STATEMENTS

The forward-looking statements are made only as of the date hereof, and GeoPark does not undertake any obligation to (and expressly disclaims any obligation to) update any forward-looking statements to reflect events or circumstances after the date such statements were made, or to reflect the occurrence of unanticipated events. In light of the risks and uncertainties described above, and the potential for variation of actual results from the assumptions on which certain of such forward-looking statements are based, investors should keep in mind that the results, events or developments disclosed in any forward-looking statement made in this document may not occur, and that actual results may vary materially from those described herein, including those described as anticipated, expected, targeted, projected or otherwise.