SEC Form 6-K filed by Geopark Ltd

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 6-K

REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934

For the month of January 2026

Commission File Number: 001-36298

GeoPark Limited

(Exact name of registrant as specified in its charter)

Calle 94 N° 11-30 8° piso

Bogota, Colombia

(Address of principal executive office)

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

GEOPARK LIMITED

TABLE OF CONTENTS

Item 1

GEOPARK ANNOUNCES ACQUISITION OF FRONTERA ENERGY’S COLOMBIAN E&P ASSETS TO CREATE LEADING INDEPENDENT E&P PLATFORM ACROSS COLOMBIA AND ARGENTINA

TRANSACTION DOUBLES GEOPARK’S PRODUCTION AND RESERVES, ENHANCES SCALE AND CASH FLOW GENERATION, AND STRENGTHENS CAPACITY TO FUND GROWTH IN VACA MUERTA

Bogota, Colombia – January 29, 2026 – GeoPark Limited (“GeoPark” or the “Company”) (NYSE: GPRK), a leading independent energy company with over 20 years of successful operations across Latin America, today announces that it has entered into a definitive agreement (the “Agreement”) with Frontera Energy Corporation (“Frontera Energy”) to acquire 100% of Frontera Petroleum International Holdings B.V. (“Frontera International”) which consists exclusively of oil and gas exploration and production assets in Colombia, for a cash purchase price of US$375 million, subject to customary closing adjustments, and an additional payment of US$25 million contingent on the achievement of certain development milestones. The transaction does not include the acquisition of Frontera Energy Corporation (a publicly listed Canadian holding company) nor its infrastructure assets nor its exploration interests in Guyana.

The transaction creates a leading regional independent E&P platform across Colombia and Argentina, materially enhancing GeoPark’s scale, reserve base and cash-flow generation, while strengthening its capacity to fund disciplined growth through the cycle.

Felipe Bayon, Chief Executive Officer of GeoPark, said: “Today’s announcement marks an important milestone in GeoPark’s growth trajectory. After extensive discussions with Frontera Energy over the past year, we are pleased to have reached an agreement that adds Frontera’s Colombian assets to our portfolio, positioning GeoPark as the largest private operator in Colombia and creating a stronger and more resilient platform with greater scale, longer production plateaus and improved cash-flow durability, while continuing to fund our growth in Vaca Muerta. Beyond the financial and production metrics, this transaction enables a full-field development approach in assets such as Quifa and the broader Llanos portfolio, allowing us to extend plateau production, capture synergies and reinvest efficiently. This will support sustained production, reserves protection and increased investment activity that benefits the regions where we operate through jobs, royalties and taxes.”

STRATEGIC RATIONALE AND FINANCIAL HIGHLIGHTS

The transaction represents a pivotal step in GeoPark’s long-term strategy to build a stronger and more resilient independent E&P platform in Latin America. By materially increasing scale, reserves, production and cash-flow generation, the transaction establishes a clear pathway for sustained value creation through disciplined growth, integration and portfolio optimization, including enabling GeoPark to fully unlock the value of its Vaca Muerta assets in Argentina.

GeoPark has decades of operating experience in Colombia, deep local technical and operational expertise, and long-standing relationships with regulators, partners, contractors and host communities. This local presence and track record underpin GeoPark’s ability to integrate and operate the combined assets efficiently, safely and responsibly, while maximizing value creation through disciplined execution.

The transaction enables a full-field development approach for the acquired assets — particularly the Quifa field and the other Llanos Basin blocks — supporting a higher and more sustained level of drilling, workovers, facilities expansion and water-management projects. GeoPark’s proven experience in managing mature, complex assets in the Llanos basin and other basins adjacent to it provides a strong foundation to protect and extend reserves, moderate natural decline, and sustain production over time.

The resulting increase in development activity is expected to translate into higher long-term production, royalties, taxes and local employment, strengthening the contribution of these assets to Colombia’s energy supply chain and regional economies. At the same time, it reinforces GeoPark’s role as a responsible, long-term operator, well positioned to steward these assets through the next phase of their development while delivering value to shareholders and stakeholders alike.

The transaction is expected to provide:

Enhanced Scale, Cash-Flow Generation and Capacity to Fund Growth

Transformational Reserves Growth

Attractive Entry Valuation and Per-Share Accretion

Disciplined Balance Sheet with Clear Path to Deleveraging³

¹ The Company is unable to present a quantitative reconciliation of the expected EBITDA which is a forward-looking non-GAAP measure, because the Company cannot reliably predict certain of the necessary components, such as write-off of unsuccessful exploration efforts or impairment loss on non-financial assets, etc. Since net leverage and net debt to EBITDA are calculated based on EBITDA, for similar reasons, the Company does not provide a quantitative reconciliation of net leverage and net debt to EBITDA.

² Frontera Energy’s 2024 reserves certified by DeGolyer and MacNaughton Corp.

³ Net leverage calculations are based on the forward strip price curve as of January 26, 2026.

Synergies and Integration Upside

Optionality and Potential Upside

TRANSACTION OVERVIEW

The total cash consideration consists of:

Pursuant to the Agreement, GeoPark will also assume Frontera Energy’s US$310 million unsecured notes (7.875% coupon, maturing in 2028), which will remain outstanding post-closing, and US$79 million net outstanding under a prepayment facility. The transaction implies an enterprise value of approximately US$600 million for the acquired assets, comprising the cash consideration and the assumption of existing debt, less Frontera International’s cash position.

The acquired portfolio comprises 17 upstream blocks in Colombia and provides a strong strategic fit with GeoPark’s existing asset base through a balanced combination of producing assets and exploration opportunities across two highly complementary core areas:

In addition to the upstream asset portfolio, the transaction includes Frontera Energy’s integrated water management and environmental sustainability project, comprised of the SAARA (formerly Agrocascada) reverse osmosis water treatment facility and the ProAgrollanos palm oil plantation which benefits from irrigation from SAARA.

The transaction has an effective date of January 1, 2026, subject to regulatory approvals and customary closing conditions. The acquisition will be funded through a combination of cash on hand and committed sources of financing, including a prepayment facility with Vitol (up to US$500 million, US$330 million committed). No equity issuance is contemplated in the transaction.

The transaction includes customary termination fees under the definitive agreement, applicable in certain circumstances, consistent with transactions of this nature.

The Agreement has been unanimously approved by the Boards of Directors of both GeoPark and Frontera Energy, and support agreements have been entered into with Frontera Energy’s directors, officers and shareholders holding a majority of the voting power.

ADVISORS

BTG Pactual acted as exclusive M&A financial advisor to GeoPark in the transaction, while Cleary Gottlieb Steen & Hamilton, Bennett Jones, and CMS Rodríguez-Azuero served as legal counsels and FGS Global served as strategic communications advisor.

MEDIA:

GLOSSARY

NOTICE

Additional information about GeoPark can be found in the Invest with Us section of the website at  www.geo-park.com

The reserve estimates provided in this release are estimates only, and there is no guarantee that the estimated reserves will be recovered. Actual reserves may eventually prove to be greater than, or less than, the estimates provided herein. Statements relating to reserves are by their nature forward-looking statements.

Gas quantities estimated herein are reserves to be produced from the reservoirs, available to be delivered to the gas pipeline after field separation prior to compression. Gas reserves estimated herein include fuel gas.

Rounding amounts and percentages: Certain amounts and percentages included in this press release have been rounded for ease of presentation. Percentage figures included in this press release have not in all cases been calculated on the basis of such rounded figures, but on the basis of such amounts prior to rounding. For this reason, certain percentage amounts in this press release may vary from those obtained by performing the same calculations using the figures in the financial statements. In addition, certain other amounts that appear in this press release may not sum due to rounding.

Oil and gas production figures included in this release are stated before the effect of royalties paid in kind, consumption and losses.

CAUTIONARY STATEMENTS RELEVANT TO FORWARD-LOOKING INFORMATION

This press release contains statements that constitute forward-looking statements. Many of the forward-looking statements contained in this press release can be identified by the use of forward-looking words such as ‘‘anticipate,’’ ‘‘believe’’, ‘‘could,’’ ‘‘expect,’’ ‘‘should,’’ ‘‘plan,’’ ‘‘intend,’’ ‘‘will,’’ ‘‘estimate’’ and ‘‘potential,’’ among others.

Forward-looking statements that appear in a number of places in this press release include, but are not limited to, statements regarding the intent, belief or current expectations, regarding various matters including our reserves, cash flow generation, royalties, taxes and employment, pro forma production, NAV accretion, exploration, estimated future revenues, EBITDA, pro forma net leverage, net debt to EBITDA, commercial, operational and administrative synergies, and closing of the transaction. Forward-looking statements are based on management’s beliefs and assumptions, and on information currently available to the management. Such statements are subject to risks and uncertainties, and actual results may differ materially from those expressed or implied in the forward-looking statements due to various factors.

Forward-looking statements speak only as of the date they are made, and the Company does not undertake any obligation to update them in light of new information or future developments or to release publicly any revisions to these statements in order to reflect later events or circumstances or to reflect the occurrence of unanticipated events. For a discussion of the risks facing the Company which could affect whether these forward-looking statements are realized, see the Company’s filings with the U.S. Securities and Exchange Commission (SEC).

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

Date: January 30, 2026