William F. Wallace

Kerr-McGee Corp. is an energy and inorganic chemical. It subsidiaries, joint ventures and other affiliates have operations throughout the world. The company core business, which include exploration, production of oil and gas resources. It was founded in 1929 and is headquartered Oklahoma City, Ok

Plains Petroleum Co. produces, develops, and explores oil & gas. The company provides services in the Midcontinent, Permian Basin, Gulf coast, and Rocky Mountain regions of the United States. The company is headquartered in Lakewood, CO.

Texaco, Inc. explores and produces oil and natural gas. It engages in the worldwide exploration, production and marketing of crude oil, natural gas, and petroleum products. The company was founded in 1902 and is headquartered in San Ramon, CA.

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.

Westport Resources Corp. provided oil and natural gas exploitation, acquisition and exploration services. The firm became extinct after its acquisition by Kerr-McGee Corp. It was located in Denver, CO.

EPL Oil & Gas, Inc. operated as an oil and natural gas exploration and production company. It was focused on acquiring and developing assets on state and federal waters offshore Louisiana in the United States Gulf of Mexico shelf region. The company was founded on January 29, 1998 and was headquartered in Houston, TX.

WesternZagros Resources ULC operated as an international oil and gas company. The firm focused on acquiring, exploring and developing crude oil and natural gas in the Kurdistan Region of Iraq. The company was founded by M. Simon Hatfield on August 22, 2007 and was headquartered in Calgary, Canada.

Taylor Energy Co. LLC engages in oil and gas activities. The company was founded by Patrick F. Taylor on November 28, 2005 and is headquartered in New Orleans, LA.