Ernest A. Leyendecker

Anadarko Petroleum Corp. is an independent exploration and production company. It operates through the following segments: Exploration and Production; WES Midstream; and Other Midstream. The Exploration and Production segment focuses on the exploration, development, production, and sale of oil and natural gas. The WES Midstream and Other Midstream segment consists of gathering, compressing, treating, processing, and transporting of natural gas; gathering, stabilizing, and transporting of oil and natural gas liquids. The company was founded in 1959 and is headquartered in The Woodlands, TX.

Society of Petroleum Engineers, Inc. provides petroleum engineering services. The non-profit company is based in Allen, TX and has subsidiaries in United States, India and Canada.

Marathon Oil Co. engages in exploring, transporting and markets crude oil and natural gas properties. The company is headquartered in Houston, TX.

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

Anadarko Algeria Co. LLC provides oil and gas exploration services. It has production facilities and other operating units in Algerian Sahara Desert. The company is headquartered in Uxbridge, the United Kingdom.