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22 companies

Amerada Hess Corp (Corporate Headquarters)

New York,, New York, United StatesUpdated May 2005

Hess Corporation is a leading independent energy company engaged in global petroleum exploration, production, and midstream operations, including offshore oil developments such as the Stabroek Block in Guyana.

Anadarko Petroleum Corp.

The Woodlands,, Texas,, United StatesUpdated Feb 2004

Anadarko Petroleum Corp. is an energy company focused on oil and gas production, advancing low-carbon technologies including carbon capture and enhanced oil recovery.

BP Exploration (Alaska), Inc.

900 East Benson Boulevard, Anchorage, Alaska, United StatesUpdated Jul 2010

BP Exploration (Alaska), Inc. is a leading producer of oil and natural gas in the United States and a major investor in U.S. energy development, operating under the BP family of brands including Amoco, ARCO, and BP gasolines.

Berry Petroleum Company Online

Location not listedUpdated Dec 2002

Berry Corporation (BRY) is now part of California Resources Corporation (CRC), an energy company focused on oil and gas production in California.

Enterprise Oil

Location not listedUpdated Dec 2002

Enterprise Oil was a British oil company involved in exploration and production of oil and gas.

Envirotech Petroleum Services Co. Ltd. or EPS

United Arab EmiratesUpdated May 2005

Envirotech Petroleum Services Co. Ltd. (EPS) is a UAE-based company providing environmentally friendly oilfield solutions, including production enhancement, maintenance products, environmental cleanup chemicals, and oil field treating chemicals.

Exco Resources

Location not listedUpdated Dec 2002

EXCO Resources, Inc. is an independent oil and natural gas company focused on the exploitation, exploration, acquisition, development, and production of onshore U.S. oil and natural gas properties, primarily in Texas, Louisiana, and the Appalachia region.

Husky Oil Limited

Location not listedUpdated Dec 2002

Husky Oil Limited is a Canadian integrated energy company engaged in the exploration, production, and refining of oil and natural gas.

Illinois Oil & Gas Associaatio

Location not listedUpdated May 2026
Training

The Illinois Oil and Gas Association is an agency representing oil and gas producers, landowners, and royalty owners in Illinois, focusing on advocacy, education, and networking within the oil and gas industry.

Kimberley Oil NL

Location not listedUpdated Dec 2002

Kimberley Oil NL is an Australian company engaged in oil exploration and production activities.

Lukoil Oil Company

Boulevard,, Moscow,, RussiaUpdated Aug 2005
Bunker Supplier

LUKOIL is one of the largest vertically integrated oil and gas companies globally, involved in crude production, refining, petrochemicals, and distribution through retail centers and filling stations.

Marathon Oil

Marietta, OH, United StatesUpdated Jan 2010

Marathon Oil Corporation is an exploration and production company focused on oil and gas, recently acquired by ConocoPhillips.

Norsk Hydro ASA

Oslo, NorwayUpdated Dec 2002

Norsk Hydro ASA is a leading aluminium and renewable energy company with significant operations in oil and gas production, including offshore installations and subsea developments, primarily in Norway and internationally.

Occidental Petroleum Corp.

Location not listedUpdated Dec 2002

Occidental Petroleum Corp. is an energy company focused on producing vital energy while innovating for a lower-carbon future through carbon innovation and enhanced oil recovery technologies.

Prima Energy Corporation

Location not listedUpdated Dec 2002

Prima Energy Corporation is an energy company specializing in the development and production of oil and natural gas resources.

Ranger Oil Ltd.

Location not listedUpdated Dec 2002

Ranger Oil Ltd. is an independent oil and gas exploration and production company based in Canada.

Royale Energy

Location not listedUpdated May 2026

Royale Energy Inc. is a publicly traded independent oil and gas production company operating wells in California and Texas, focused on development drilling projects and marketing oil and natural gas.

Shell Exploration & Production

Location not listedUpdated May 2026

Shell Exploration & Production is a core business of the Royal Dutch/Shell Group, focusing on the upstream petroleum industry including the search for and production of hydrocarbons worldwide.

Statoil do Brasil Ltda

Rio de Janeiro, BrazilUpdated Aug 2006

Statoil do Brasil Ltda holds interests in multiple deepwater oil blocks on the Brazilian continental shelf, operating several offshore projects with water depths ranging from 1,000 to 2,700 metres.

USX-Marathon

Location not listedUpdated May 2026

Marathon Oil Corporation is an energy company focused on exploration and production, recently acquired by ConocoPhillips.

WSPA Western States Petroleum Association

Sacramento,, CA, United StatesUpdated Oct 2003

Western States Petroleum Association (WSPA) is a non-profit trade association representing petroleum companies involved in exploration, production, refining, transportation, and marketing in six western U.S. states.