Jack R. Ekstrom

Whiting Petroleum Corp. engages in the development, production, acquisition, and exploration of oil and gas properties. It operates in the Rocky Mountains regions. The company was founded by Kenneth R. Whiting and J. Bert Ladd in January 1980 and is headquartered in Denver, CO.

Pioneer Natural Resources Co. operates as an independent oil and gas exploration and production company. The firm engages in hydrocarbon exploration in the Cline Shale. It focuses on the operation of the Permian Basin, Eagle Ford Shale, Rockies, and West Panhandle projects. The company was founded by Scott Douglas Sheffield on April 2, 1997, and is headquartered in Irving, TX.

Evergreen Resources, Inc., located below the Western prairies and below the Rocky Mountains and the waters of the Gulf of Mexico. The exploration and production company, which has boosted its Gulf of Mexico properties, holds proved reserves oil equivalent. The vast majority of the exploration and production company's reserves are found within the US.

Forest Oil Corp. is an independent oil and gas company, engaged in the acquisition, exploration, development and production of natural gas and liquids in the United States and selected international locations. The company's reserves and operational areas are in the Texas Panhandle, the Eagle Ford Shale in South Texas, and the Ark-La-Tex area. Its core operational areas consist of drilling projects that have exposure to oil, natural gas, and natural gas liquids. Forest Oil was founded in 1916 and is headquartered in Denver, CO.

Colorado Oil & Gas Association engages in the exploration and production of oil and gas. The private company is based in Denver, CO. The company was founded by Anthony W. Sharp. Dan Haley has been the CEO of the company since 2015.

Denver Petroleum Club operates as a membership organization that supports professionals in the oil, gas, and energy industries. The private company is based in Denver, CO. The company provides networking opportunities, leadership development, and educational resources to their members.

Western Energy Alliance is a nonprofit trade association based in Denver, CO, representing 300 companies engaged in environmentally responsible exploration and production of oil and natural gas in the west. The company believes in the principle of multiple use of non-park, non-wilderness public lands and has consistently stressed the importance of public lands advocacy over many years. The company is an advocacy organization promoting the best practices in the industry.