John B. Holmes

Sooner Holdings, Inc. owns the Syntroleum Process for Fischer-Tropsch (FT) conversion of synthesis gas derived from biomass, coal, natural gas and other carbon-based feedstocks into liquid hydrocarbons, the Synfining Process for upgrading FT liquid hydrocarbons into middle distillate products such as synthetic diesel and jet fuels, and the Bio-Synfining technology for converting animal fat and vegetable oil feedstocks into middle distillate products such as renewable diesel and jet fuel. The company is focused on siting, engineering and constructing a plant that produces clean renewable synthetic diesel and jet fuel using low grade fats and greases as feedstock. It was founded by Kenneth L. Agee on November 15, 1984 and is headquartered in Tulsa, OK.

Natural Gas Partners LLC (NGP) is a private equity firm, a subsidiary of NGP Energy Capital Management, LLC founded in 1988 by David Russell Albin and Kenneth Alfredo Hersh. The firm is headquartered in Dallas, Texas.

El Paso Interim Corp. provides natural gas and related energy products in a safe, efficient and dependable manner. The company owns North America's interstate natural gas pipeline systems, which provides a stable base of earnings and cash flow and has a backlog of committed expansion projects. The company operates through three segments: Pipelines, Exploration and Production & Marketing. The Pipelines segment provides natural gas transmission, storage, and related services, primarily in the USA primarily through eight wholly or majority owned interstate pipeline systems and equity interests in two transmission systems. The Exploration and Production segment is engaged in the exploration for and the acquisition, development and production of oil, natural gas and NGL, in the US, Brazil and Egypt. The Marketing segment markets on behalf of its Exploration and Production segment and manages the price risks associated with its oil and natural gas production as well as manages remaining legacy trading portfolio. The company was founded by Paul Kayser in 1928 and is headquartered in Houston, TX.

Part of Kinder Morgan, Inc., Zilkha Energy Co. is a company that explores for and drills natural oil and gas. The company is based in Houston, TX. Zilkha Energy was acquired by Sonat, Inc. on January 30, 1998 for $1,014.65 million.