Media Contact: Catherine Chantharaj
American Stock Exchange
212-306-1689 / catherine.chantharaj@amex.com

New York, April 8, 2008 — The American Stock Exchange® (Amex®) today listed the common stock of Gran Tierra Energy, Inc. under the ticker symbol GTE. 

Gran Tierra Energy, Inc. was formed in 2005, with extensive hands-on experience in oil and natural gas exploration and production in most of the world’s principal petroleum producing regions. The Company’s objective is to acquire and exploit international opportunities in oil and natural gas exploration, development and production, with an initial focus on South America. The Company made their first acquisition of oil and gas producing and non-producing properties in Argentina in September 2005. In addition, they acquired assets in Colombia and other interests in Argentina and Peru.

“We are pleased to welcome Gran Tierra Energy to the American Stock Exchange,” said Neal Wolkoff, Chairman and CEO, of Amex. “Many Canadian resource companies have chosen Amex as their home and we look forward to providing Gran Tierra with the solid support and services that are essential in today’s competitive marketplace.”    

Mr. Dana Coffield, Chief Executive Officer of Gran Tierra Energy Inc., stated, “Graduating to the American Stock Exchange represents a significant milestone for Gran Tierra Energy, our shareholders, and our employees. We take great pride in this accomplishment, which is a further step in the building of a solid foundation upon which we can continue to grow our business. We expect this listing will provide the opportunity to broaden our investor base and will create additional liquidity for our shareholders. In addition, the American Stock Exchange listing will provide greater visibility for "GTE" in the investment community."

The specialist for Gran Tierra Energy, Inc. is AGS Specialist Partners. For further information on GTE and other Amex-listed companies, please visit www.amex.com.