Cortlandt S. Dietler

Part of Duke Energy Corp., Associated Natural Gas Corp. is a company that specializes in energy resource development and is a holding company. The company is based in Houston, TX. Associated Natural Gas was acquired by PanEnergy Corp. on December 16, 1994 for $591 million.

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.

NGL TM LLC markets and distributes petroleum products. Its products include unbranded gasoline, diesel fuel, heating oil, marine fuels, jet fuels, crude oil, natural gas, residual fuel oils, chemicals, and fertilizers. The company was founded by Cortlandt S. Dietler in 1981 and is headquartered in Denver, CO.

Cimarex Energy Co. is an independent oil and gas exploration and production company. Its activities include drilling, completing and operating wells. It operates through the following areas: Permian Basin, Mid-Continent, and Others in Oklahoma, Texas and New Mexico. The company was founded by F. H. Merelli in February 2002 and is headquartered in Denver, CO.

Nytis Exploration (USA), Inc. operates as a independent oil and gas company that engages in the exploration, development and production of natural gas. It provides oil-field drilling and exploration services. The company was founded in 2004 and is headquartered in Denver, CO.

Ellora Energy, Inc. provides oil and gas exploration and production services. It primarily operates in two areas, east Texas and adjacent lands in western Louisiana; and the Hugoton field in southwest Kansas. the company was founded in 1995 and is headquartered in Boulder, CO.

National Energy Resources Acquisition Co. was a blank check company formed for the purpose of targeting businesses in the energy and natural resources industry for an initial business combination. National Energy Resources Acquisition was founded in November 2007 and was headquartered in Denver, CO.