EOG Resources, Inc., together with its subsidiaries, explores for, develops, produces, and markets crude oil, natural gas liquids, and natural gas primarily in producing basins in the United States, the Republic of Trinidad and Tobago and internationally. The company was formerly known as Enron Oil & Gas Company. EOG Resources, Inc. was incorporated in 1985 and is headquartered in Houston, Texas.

Southwestern Energy Company, an independent energy company, engages in the exploration, development, and production of natural gas, oil, and natural gas liquids (NGLs) in the United States. It operates through two segments, Exploration and Production, and Marketing. The company focuses on the development of unconventional natural gas and oil reservoirs located in Pennsylvania, West Virginia, Ohio, and Louisiana. It also engages in the marketing and transportation of natural gas, oil, and NGLs. It serves LNG exporters, energy companies, utilities, and industrial purchasers of natural gas. Southwestern Energy Company was incorporated in 1929 and is headquartered in Spring, Texas.

Chord Energy Corporation operates as an independent exploration and production company in the United States. It acquires, explores, develops, and produces crude oil, natural gas, and natural gas liquids in the Williston Basin. The company sells its products to refiners, marketers, and other purchasers that have access to nearby pipeline and rail facilities. The company was formerly known as Oasis Petroleum Inc. and changed its name to Chord Energy Corporation in July 2022. Chord Energy Corporation was founded in 2007 and is headquartered in Houston, Texas.

Matador Resources Company, an independent energy company, engages in the exploration, development, production, and acquisition of oil and natural gas resources in the United States. It operates through two segments, Exploration and Production; and Midstream. The company primarily holds interests in the Wolfcamp and Bone Spring plays in the Delaware Basin in Southeast New Mexico and West Texas. It also operates the Eagle Ford shale play in South Texas; and the Haynesville shale and Cotton Valley plays in Northwest Louisiana. In addition, the company conducts midstream operations in support of its exploration, development, and production operations. Further, it provides natural gas processing and oil transportation services; and oil, natural gas, and produced water gathering services, as well as produced water disposal services to third parties. The company sells natural gas to unaffiliated independent marketing companies and unaffiliated midstream companies. The company was formerly known as Matador Holdco, Inc. and changed its name to Matador Resources Company in August 2011. Matador Resources Company was founded in 2003 and is headquartered in Dallas, Texas.

Magnolia Oil & Gas Corporation, an independent oil and natural gas company, engages in the acquisition, development, exploration, and production of oil, natural gas, and natural gas liquids reserves in the United States. Its properties are located primarily in Karnes County and the Giddings area in South Texas principally comprising the Eagle Ford Shale and the Austin Chalk formation. The company was incorporated in 2017 and is headquartered in Houston, Texas.

SM Energy Company, an independent energy company, engages in the acquisition, exploration, development, and production of oil, gas, and natural gas liquids in the state of Texas. It has working interests in oil and gas producing wells in the Midland Basin and South Texas. The company was formerly known as St. Mary Land & Exploration Company and changed its name to SM Energy Company in May 2010. SM Energy Company was founded in 1908 and is headquartered in Denver, Colorado.

Battalion Oil Corporation, an independent energy company, engages in the acquisition, production, exploration, and development of onshore oil and natural gas assets in the United States. It holds interests in the Delaware Basin located in the counties of Pecos, Ward, Reeves, and Winkler, Texas. It serves independent marketers, and oil and natural gas and gas pipeline companies. The company was formerly known as Halcón Resources Corporation and changed its name to Battalion Oil Corporation in January 2020. Battalion Oil Corporation was founded in 1987 and is headquartered in Houston, Texas.

Ring Energy, Inc., an independent oil and natural gas company, engages in the acquisition, exploration, development, and production of oil and natural gas properties. The company has interests in 56,711 net developed acres and 2,668 net undeveloped acres in Andrews, Gaines, Crane, Ector, Winkler, and Ward counties, Texas; and 8,751 net developed acres and 12,405 net undeveloped acres in Yoakum County, Texas and Lea County, New Mexico. It primarily sells its oil and natural gas production to end users, marketers, and other purchasers. The company was formerly known as Transglobal Mining Corp. and changed its name to Ring Energy, Inc. in March 2008. Ring Energy, Inc. was incorporated in 2004 and is headquartered in The Woodlands, Texas.