Mark L. Pease

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.

Maverick Natural Resources LLC engages in the business of acquisition, exploitation, and development of oil and gas properties. Its assets consist of producing and non-producing crude oil, and natural gas reserves. The company was founded on March 23, 2006 and is headquartered in Houston, TX.

Part of Maverick Natural Resources LLC, BreitBurn GP LLC focuses on the acquisition, exploitation and development of oil and gas properties. The company is based in Los Angeles, CA. The company was founded by Randall Hart Breitenbach, Halbert S. Washburn. Halbert S. Washburn has been the CEO since incorporation.

Pacific Coast Energy Co. LP explores and develops onshore oil and gas properties. The firm's activities include interpretation to the drilling of exploration, development wells, and the construction of production facilities. The company was founded by Randall Hart Breitenbach and Halbert S. Washburn in 1997 and is headquartered in Orcutt, CA.

Breitburn Operating LP engages in the acquisition, exploitation, and development of oil and gas properties. It operates and produces oil and gas in midwest (Michigan, Indiana & Kentucky), ark-la-tex (Arkansas, Louisiana & East Texas), rockies (Wyoming & Colorado), California, permian basin (Texas & New Mexico), southeast (Florida & Alabama), and mid-continent (Oklahoma). The company was founded on August 9, 2006 and is headquartered in Los Angeles, CA.

Pacific Coast Energy Holdings LLC operates as a holding company. The company is headquartered in Orcutt, CA.