CALGARY, Alberta, Oct. 24, 2025 (GLOBE NEWSWIRE) -- Gran Tierra Energy Inc. (“Gran Tierra” or the “Company”) (NYSE American:GTE)(TSX:GTE)(LSE:GTE) today announced that it has, through its wholly owned subsidiary Gran Tierra Energy Colombia GmbH, a Swiss limited liability company (the “Seller”), entered into a crude oil sale and purchase agreement and a related prepayment addendum (together, the “Oriente Crude Oil Agreements”). Under the Oriente Crude Oil Agreements, the Seller will receive an initial advanc ...