Mr. Gary Guidry reports

GRAN TIERRA ENERGY INC. STOCKHOLDERS APPROVE SALE OF COLOMBIAN AND ECUADORIAN BUSINESSES

Gran Tierra Energy Inc.'s stockholders have approved the previously announced sale of Gran Tierra's Colombian and Ecuadorian businesses to Maurel & Prom for total consideration of approximately $1.33-billion (U.S.), including the assumption of debt and subject to adjustment. The vote took place at the company's special meeting of stockholders held on Oct. 9, 2026. The sale is to be effected pursuant to the share sale and purchase agreement entered into on Aug. 5, 2026. Gran Tierra expects to receive total net cash proceeds from the sale of approximately $315-million (U.S.), of which approximately $250-million (U.S.) is payable on closing and approximately $65-million (U.S.) is payable 364 days thereafter.

"We thank our stockholders for their support of the sale," said Gary Guidry, president and chief executive officer of Gran Tierra. "Today's approval moves us a step closer to closing a transaction that realizes value for our Colombian and Ecuadorian businesses. On closing, Gran Tierra expects to be debt free, with the flexibility to return capital to stockholders, and fund our Canadian and Azerbaijan portfolios."

Special meeting results: Based on the final report of the independent inspector of election, the voting results for each of the proposals considered at the special meeting are set out below. Final voting results will also be reported in a current report on Form 8-K to be filed with the U.S. Securities and Exchange Commission (the SEC).

Closing of the sale: With stockholder approval and the requisite consents of the holders of the company's 9.750-per-cent senior secured amortizing notes due 2031 now obtained, the remaining conditions to closing include the regulatory approvals in Colombia and Ecuador, and other customary closing conditions. Completion of the sale remains subject to the satisfaction or waiver of these and the other closing conditions set out in the share purchase agreement, as described in the company's definitive proxy statement filed on Sept. 15, 2026. Gran Tierra continues to target closing of the sale on or about Dec. 31, 2026. As previously announced, the company expects to use a portion of the net cash proceeds from the sale to return capital to stockholders through a share repurchase, the structure, size and terms of which will be determined by the board of directors and announced separately. Any share repurchase is conditional on completion of the sale.

About Gran Tierra Energy Inc.

Gran Tierra Energy, together with its subsidiaries, is an independent international energy company currently focused on oil and natural gas exploration and production in Canada, Colombia and Ecuador. The company is the operator of, and holds a 65-per-cent working interest in, an onshore exploration, development and production sharing agreement in Azerbaijan. Upon completion of the sale, the company's operations will be focused on Canada and Azerbaijan, and the company will continue to pursue additional new growth opportunities that would further strengthen the company's portfolio. The company's common stock trades on the NYSE American, the Toronto Stock Exchange and the London Stock Exchange under the ticker symbol GTE.

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