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.
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.
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.
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.
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.
Continental Resources, Inc. is a petroleum and natural gas exploration and production company headquartered in Oklahoma City. The company was founded by Harold Hamm in 1967 at the age of 21 as Shelly Dean Oil Company, originally named for Hamm's two daughters. In 1990, Shelly Dean re-branded itself as Continental Resources. It primarily used hydraulic fracturing and directional drilling to produce from low permeability formations.
Denbury Inc. was a company engaged in hydrocarbon exploration and extraction via enhanced oil recovery, utilizing carbon dioxide to extract petroleum from fields that have been previously exploited. In November 2023 it was acquired by ExxonMobil.
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.
Chord Energy Corporation is a company engaged in hydrocarbon exploration and hydraulic fracturing in the Williston Basin in North Dakota and Montana. It is organized in Delaware and headquartered in Houston, Texas, with an office in Williston, North Dakota. The company was formerly known as Oasis Petroleum.
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.
Ben M. "Bud" Brigham is an American oil and gas explorer, entrepreneur, and investor.
US$6.797 billion (2021)