CALGARY, Alberta, Oct. 10, 2018 (GLOBE NEWSWIRE) — Gran Tierra Energy Inc. (“Gran Tierra” or the “Company”) (NYSE American:GTE) (NYSE MKT:GTE) (TSX:GTE) (LSE:GTE) is pleased to announce that its common stock is expected to be admitted today to the standard listing segment of the Official List of the Financial Conduct Authority and to trading on the main market of the London Stock Exchange (“LSE”) for listed securities under the ticker “GTE”. The Company’s common stock will also continue to trade on the NYSE American and on the Toronto Stock Exchange. All dollar amounts are in United States (“U.S.”) dollars. Production amounts are on an average working interest before royalties (“WI”) basis. Per barrel of oil equivalent (“BOE”) amounts are based on WI sales before royalties. All numbers and values have been previously disclosed by the Company in prior press releases and regulatory filings.