Gran Tierra Energy Inc. Enters into Crude Oil Sale and Purchase Agreement with Trafigura PTE Ltd.

Gran Tierra Energy Inc. (the 'Company') announced that its wholly owned subsidiary, Gran Tierra Energy Colombia GmbH (the 'Seller'), entered into a crude oil sale and purchase agreement (the 'Purchase and Sale Agreement') and a related prepayment addendum (the 'Prepayment Addendum') with Trafigura PTE Ltd. (the 'Buyer') on October 24, 2025. The agreements, governed by English law, provide for the sale of Oriente crude oil by the Seller to the Buyer. The Prepayment Addendum establishes a prepayment structure under which the Buyer agreed to make available to the Seller an initial advance of up to $150 million and an additional advance of up to $50 million, subject to certain conditions. The funds advanced under the Prepayment Addendum will be used to repay outstanding borrowings under the Credit Agreement, repurchase senior notes, and fund capital expenditures in Ecuador. The obligations of the Seller under the Prepayment Addendum are guaranteed by the Company. Additionally, the Company, the Seller, and certain indirect subsidiaries entered into an amendment to the existing Credit Agreement, which reduces the borrowing base to $60 million and requires the Seller to prepay outstanding loans to reduce the aggregate outstanding principal amount to no more than $20 million by January 23, 2026.