Donald Charles Klapko

Enterra Energy Trust is an exploration and production oil and gas trust based in Calgary, Alberta, Canada with its United States operations office located in Oklahoma City, Oklahoma. Its trust units and debentures are listed on the Toronto Stock Exchange under the symbols ENT.UN, ENT.DB, ENT.DB.A and Enterra's trust units are listed on the New York Stock Exchange under the symbol ENT. The Trust portfolio of oil and gas properties is geographically diversified with producing properties located principally in Alberta, British Columbia, Saskatchewan and Oklahoma. Current production is comprised of approximately 50 percent natural gas and 50 percent crude oil and natural gas liquids.

Enterra Energy Corp. produces and distributes oil and gas. Its services include providing exploration and production of crude oil and natural gas both onshore and offshore. The company is headquartered in Calgary, Canada.

Equal Energy Ltd. engages in the exploration, development and production of oil and natural gas. Its portfolio of oil and gas properties is geographically diversified with producing properties located principally in Oklahoma and Alberta. The company is headquartered in Calgary, Canada.

Trigger Resources Ltd. provides oil and gas exploration services. The company is based in Calgary, Canada. Trigger Resources was acquired by Enterra Energy Trust on April 30, 2007 for $56.69 million.