Stephen Creamer

MarkWest Hydrocarbon LLC provides natural gas processing services. It also provides transportation, fractionation, and storage of natural gas liquids and transportation of crude oil. The company was founded by John M. Fox in April 1998 and is headquartered in Denver, CO.

High Sierra Energy, LP acquires, manages, and integrates businesses & revenue generating assets in the natural resources industry. The company was founded by James J. Burke, III in 2004 and is headquartered in Denver, CO.

Cabot Energy Ltd. engaged in the exploration, production, and development of oil and gas reserves. The company was founded on May 27, 1994 and was headquartered in London, the United Kingdom.

Centennial AS invests in media and property development. The firm manages investments across multiple asset classes including private equity, energy, infrastructure, stock exchange listed shares of various companies, real estate and credit. The company is headquartered in Oslo, Norway.

Oxbow Carbon LLC distributes petroleum coke, cement and provides steel equipment. It upgrades, handles, transports and sells petroleum coke and sulphur into markets where they can be used to produce aluminum, steel, electric power, fertilizer, cement and other critical products for the world economy. The firm serves the cement, utilities, steel, energy, commodities and home heating industries. The company was founded in 1983 by William Ingraham Koch and is headquartered in West Palm Beach, FL.

Centennial Energy Resources LLC owns and operates electricity generating facilities. The firm provides analysis, design, construction, refurbishment, operation and maintenance services for independent power producers. The company was founded in 2003 and is headquartered in Bismarck, ND.