GeoPark Announces First Quarter 2026 Operational Update

• 1Q2026 average production of 859 boepd in the Platanillo Block² (GeoPark operated, 100% WI), supported by the current price environment and operational efficiencies
• GeoPark continues producing in the field while preserving flexibility for future capital allocation decisions

Upcoming Catalysts 2Q2026

• Drilling 5 gross wells in 2Q2026 in Colombia and fracking 5 wells in Argentina, targeting conventional, unconventional, development, appraisal and exploration projects
• Key projects include:

- Llanos 34 Block: Drilling 2 infill wells in the Jacana area and 1 horizontal well in the Tigana field
- CPO-5 Block: Drilling 1 development well in the CPH field, close to the Jacana Field
- Argentina: Fracking of a 5-well pad. Additionally, drilling 1 water disposal well and 1 monitoring well, while finalizing the tender process for a dedicated drilling rig for factory mode execution
- Llanos 123 Block: Drilling 1-2 development wells in the Toritos Field
- Llanos 86 Block (GeoPark operated, 50% WI): Drilling 1 exploration well

Other – Market Conditions

Unusually volatile market conditions prevailed in 1Q2026, including material movements in Brent, regional differentials, and specific disruptions in Ecuador.

Brent averaged $77.9/bbl in the quarter. Prices were in the low $60s/bbl in January, rising into the low $70s/bbl by late February before accelerating sharply in March amid escalating geopolitical tensions.

In line with the above, Vasconia differentials widened to approximately -$9.0/bbl at the weakest point of the quarter before recovering and stabilizing at -$1.0/bbl in March, averaging -$6.0/bbl in 1Q2026 versus -$3.0/bbl in 4Q2025. Medanito and Oriente followed a similar trajectory, with early-quarter weakness followed by material recovery.

In aggregate, GeoPark’s combined realized price was $60.4/bbl in 1Q2026, versus $54.8/bbl in 4Q2025, reflecting stronger Brent prices and the recovery in differentials toward quarter-end, despite a $7.0/bbl impact from hedges and earn-outs.

Additional detail on pricing, differentials, hedges and others will be provided in GeoPark’s 1Q2026 results release and accompanying Supplementary Information.

Breakdown of Quarterly Production by Country

The following table shows production figures for 1Q2026, as compared to 1Q2025:

Quarterly Production

Reporting Date for 1Q2026 Results Release, Conference Call and Webcast

GeoPark will report its 1Q2026 results on Wednesday, May 6, 2026, after market close.

GeoPark management will host a conference call on May 7, 2026, at 10:00 am (Eastern Daylight Time) to discuss the 1Q2026 financial results.

To listen to the call, participants can access the webcast located in the Invest with Us section of the Company’s website at www.geo-park.com, or by clicking below:

https://events.q4inc.com/attendee/357739077

Interested parties may participate in the conference call by dialing the numbers provided below

United States Participants: +1 646-307-1963
Global Dial-In Numbers:
https://registrations.events/directory/international/itfs.html
Passcode: 8385569

Please allow extra time prior to the call to visit the website and download any streaming media software that might be required to listen to the webcast.

An archive of the webcast replay will be made available in the Invest with Us section of the Company’s website at www.geo-park.com after the conclusion of the live call.

NOTICE

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

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

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, drilling campaign, production guidance, closing of acquisition transaction and production consolidation. 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 filings with the U.S. Securities and Exchange Commission (SEC).

Oil and gas production figures included in this release are stated before the effect of royalties paid in kind, consumption and losses. Annual production per day is obtained by dividing total production by 365 days.

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