Sale of the Company's Colombia and Ecuador Oil Business, Representing All of Its South American Assets, to Maurel & Prom Representing a Total Consideration of $1.33 Billion Continuing Company to Have an Estimated Pro-Forma PDP Net Asset Value (NPV10 BT) of Approximately $12.49 per Share (fully diluted), Representing a Premium of Approximately 83% to Gran Tierra's 20-Day Volume Weighted Average Price Purchaser to Assume Substantially All of the Company's Net Liabilities, Positioning Gran Tierra to be Debt-Free with Significant Cash at Completion Supports a Meaningful Return of Capital to Stockholders and Repositions Gran Tierra Around Fully Financed Growth Plans in Canada and Azerbaijan CALGARY, Alberta, Aug. 05, 2026 (GLOBE NEWSWIRE) -- Gran Tierra Energy Inc. (“Gran Tierra” or the “Company”) (NYSE American:GTE) (TSX:GTE) (LSE:GTE) today announced that it has entered into a definitive share sale and purchase agreement (the “Agreement”) to sell its oil business in Colombia and Ecuador (collectively, the “Divested Business”) to Établissements Maurel & Prom S.A. (“Maurel & Prom” or the “Purchaser”), a Paris-listed international oil and natural gas exploration and production company majority owned by PT Pertamina Internasional Eksplorasi dan Produksi (“PIEP”), a subsidiary of Indonesia's national energy company, PT Pertamina (Persero) (“Pertamina”), representing a total consideration of $1.33 billion (the “Transaction”).