History

• January 2005 – Predecessor company Gran Tierra Energy Inc. incorporated in Alberta, Canada.
• May 2005 – Management team installed.
• September 2005 – Inaugural Argentina acquisitions.
• November 2005 – Share exchange with Goldstrike Inc. (subsequently renamed Gran Tierra Energy Inc.).
• June 2006 – Acquisition of Argosy Energy International, Colombia, farm-in/acquisition of Vinalar Block, Argentina.
• November/December 2006 – Acquisition of assets in Argentina from Compania General de Combustibles (CGC), finalization of license contracts in Peru.
• February 19, 2008 - listed on TSX, trading symbol “GTE”
• April 8, 2008 - listed on AMEX, trading symbol “GTE”

Capitalization

• Basic shares outstanding ~ 104.8 million (at March 31 2008, including exchangeable shares).
• Fully diluted shares ~ 134.6 million (at March 31, 2008).
• Financing – A total of approximately 15.0 million units were offered in late-2005/early-2006, consisting of one share of common stock plus one warrant to purchase one-half of one share of common stock. Gross proceeds of approximately $12.0 million were used to fund the Argentina acquisitions, to cover merger and related costs and provide working capital to the company. Two private placements in June 2006 raised $75 million from the issuance of 50 million units consisting of one common share plus one warrant to purchase one-half of one share of common stock. Proceeds were used for the Argosy, Vinalar and CGC acquisitions and 2006 work programs, and are earmarked to support drilling and work programs of the Company through 2007.
• Gran Tierra Energy has a $50 million debt facility in place with Standard Bank, which includes an initial borrowing base of $7 million. As of March 31, 2008 the Company has not drawn on this facility and has no debt.

Management

Dana Coffield – President & CEO
Martin Eden – CFO
Max Wei – VP Operations
Rafael Orunesu – President, Gran Tierra Energy Argentina
Edgar Dyes – President, Gran Tierra Energy Colombia

Board

Jeffrey Scott – Chairman
Walter Dawson – Director
Verne Johnson – Director
Nick Kirton – Director
Dana Coffield – Director

Operations – Argentina

• 14% participation in the Palmar Largo Joint Venture, producing approximately 183 b/d of oil (net after royalty, Q1 2008) to the Company.
• 50% participation in the El Vinalar Block, producing approximately 187 b/d of oil (net after royalty, Q1 2008) to Gran Tierra.
• 100% participation in the El Chivil Block, producing approximately 106 b/d of oil (net after royalty, Q1 2008) to Gran Tierra.
• 100% participation in the Nacatimbay, Ipaguazu, , Valle Morado and Santa Victoria blocks. Surubi - 85%. All currently non-producing.
• Gran Tierra operates all properties with the exception of Palmar Largo.

Operations - Colombia

• 35% participation in the Santana and Guayuyaco Blocks, producing approximately 371 b/d of oil (excluding the Juanambu field, , Q1, net after royalty, Q1 2008).
• 35% participation in the Juanambu discovery (in the Guayuyaco Block), attained commerciality in November, 2007. Production was approximately 384 BOPD (net after royalty).
• 50% participation in the Chaza block which began production in June 2007, and averaged 1,611 b/d net after royalty (Q1, 2008).
• 100% participation in the Rio Magdalena Block, 20% at Talora, 15% at Mecaya and 40% at Azar – all in exploration phases.
• 100% participation in 2 new Technical Evaluation Agreements (TEA’s) in the Putumayo
• Gran Tierra Energy is operator of all properties.

Financials

Current financial results are located under Investor Relations – SEC Filings link.

Contact Investor Relations

info@grantierra.com
1-800-916-GTRE (4873)