Ovintiv Inc. is an American independent petroleum company. The company was formed in 2020 through a restructuring of its Canadian predecessor, Encana. Ovintiv is incorporated in Delaware and headquartered in Denver, Colorado.
Coterra Energy Inc. is a company engaged in hydrocarbon exploration organized in Delaware and based in Houston, Texas. The company has operations in the Permian Basin, Marcellus Shale, and the Anadarko Basin.
Marathon Oil Corporation is an American company engaged in hydrocarbon exploration incorporated in Ohio and headquartered at 990 Town and Country Boulevard in Houston, Texas. A direct descendant of Standard Oil, it also runs international gas operations focused on Equatorial Guinea, offshore Central Africa.
Devon Energy Corporation is an energy company engaged in hydrocarbon exploration in the United States. It is organized in Delaware and its corporate operative headquarters are in the 50-story Devon Energy Center in Oklahoma City, Oklahoma. Its primary operations are in the Barnett Shale STACK formation in Oklahoma, Delaware Basin, Eagle Ford Group, and the Rocky Mountains.
APA Corporation is the holding company for Apache Corporation, an American company engaged in hydrocarbon exploration. It is organized in Delaware and headquartered in Houston. The company is ranked 431st on the Fortune 500.
Energen Corporation was a company engaged in hydrocarbon exploration. In 2018, the company was acquired by Diamondback Energy.
Energen Resources Corporation was a subsidiary of Energen, formerly an oil and gas exploration and production company with headquarters in Birmingham, Alabama. The company had approximately 775 million barrels of oil equivalent proved, probable, and possible reserves and another 2.5 billion barrels of oil-equivalent contingent resources. These all-domestic reserves and resources were located primarily in the Permian Basin in west Texas. Energen also had operations in the San Juan Basin in northern New Mexico.
EOG Resources, Inc. is an American energy company engaged in hydrocarbon exploration. It is organized in Delaware and headquartered in the Heritage Plaza building in Houston, Texas.
EQT Corporation is an American energy company engaged in hydrocarbon exploration and pipeline transport. It is headquartered in EQT Plaza in Pittsburgh, Pennsylvania.
Noble Energy, Inc. was a company engaged in hydrocarbon exploration headquartered in Houston, Texas. In October 2020, the company was acquired by Chevron Corporation.
Questar Corporation was a natural gas public utility based in Salt Lake City, Utah. In September 2016, the company was acquired by Dominion Resources.
SandRidge Energy, Inc. is a company engaged in hydrocarbon exploration in the Mid-Continent region of the United States. It is organized in Delaware and headquartered in Oklahoma City, Oklahoma.
Pioneer Natural Resources Company, headquartered in Irving, Texas, is engaged in hydrocarbon exploration. It operates in the Cline Shale, which is part of the Spraberry Trend of the Permian Basin, where the company is the largest acreage holder. Pioneer is presently undergoing an acquisition by ExxonMobil, which in October 2023 agreed to acquire the company in the largest merger in the energy industry in 20 years; closing is expected in the first half of 2024.
Cenovus Energy Inc. is a Canadian integrated oil and natural gas company headquartered in Calgary, Alberta. Its offices are located at Brookfield Place, having completed a move from the neighbouring Bow in 2019.
Canadian Natural Resources Limited, or CNRL or Canadian Natural is a senior Canadian oil and natural gas company that operates primarily in the Western Canadian provinces of British Columbia, Alberta, Saskatchewan, and Manitoba, with offshore operations in the United Kingdom sector of the North Sea, and offshore Côte d'Ivoire and Gabon. The company, which is headquartered in Calgary, Alberta, has the largest undeveloped base in the Western Canadian Sedimentary Basin. It is the largest independent producer of natural gas in Western Canada and the largest producer of heavy crude oil in Canada.
Linn Energy, Inc. was a company engaged in hydrocarbon exploration. It was incorporated in Delaware and headquartered in Houston. In 2018, the company split into Roan Resources and Riviera Resources.
Vital Energy, Inc. is an American company engaged in hydrocarbon exploration incorporated in Delaware with its principal operational headquarters located in Tulsa, Oklahoma.
Cimarex Energy Co. was a company engaged in hydrocarbon exploration, particularly shale oil and gas drilling. It was organized in Delaware and headquartered in Denver, Colorado, with operations primarily in Texas, Oklahoma, and New Mexico.
WPX Energy, Inc. was a company engaged in hydrocarbon exploration. It was organized in Delaware and headquartered in Tulsa, Oklahoma. In 2021, the company merged with Devon Energy.
Concho Resources Inc. was a company engaged in hydrocarbon exploration, incorporated and organized in Delaware and headquartered in Midland, Texas, with operations exclusively in the Permian Basin. In 2021, the company was acquired by ConocoPhillips.
US$6.797 billion (2021)