Gran Tierra Energy Inc. Announces Filing of Definitive Proxy Statement for Special Meeting of Stockholders to Consider Approval of Sale of Colombian and Ecuadorian Businesses

CALGARY, Alberta, Sept. 23, 2026 (GLOBE NEWSWIRE) -- Gran Tierra Energy Inc. ("Gran Tierra" or the "Company") (NYSE American:GTE) TSX:GTE LSE:GTE announces that it filed its definitive proxy statement (the "Proxy Statement") with the U.S. Securities and Exchange Commission (the "SEC") on September…