Anadarko Petroleum is an independent exploration and production company. The company also participates in the hard-minerals business through royalty arrangements. The company's reporting segments are as follows: Exploration and Production, which is engaged in the exploration, development, production, and sale of oil, natural gas, and natural-gas liquids (NGLs) and in advancing its Mozambique liquefied natural gas project toward final investment decision; and WES Midstream and Other Midstream, in which these two segments engage in gathering, processing, treating, and transporting the company and third-party oil, natural-gas, and NGL production as well as gathering and disposal of produced water.

Cabot Oil & Gas is an independent oil and gas company engaged in the development, exploitation, exploration and production of oil and gas properties. The company operates in one segment, natural gas and oil development, exploitation, exploration and production, in the continental United States. The company's operations are primarily concentrated in one unconventional play—the Marcellus Shale in northeast Pennsylvania.

Canadian Natural Resources is an independent crude oil and natural gas exploration, development and production company. Co.'s exploration and production operations are focused in North America, largely in Western Canada; the U.K. portion of the North Sea; and CA'te d'Ivoire, Gabon, and South Africa in Offshore Africa. Co. had total proved reserves of 5.71 billion barrels of oil equivalent. Co.'s gross proved crude oil, bitumen (thermal oil), synthetic crude oil and natural gas liquids reserves totaled 4.70 billion barrels and its gross proved natural gas reserves totaled 6,106.00 billion cubic feet.

Chesapeake Energy is a holding company. Through its subsidiaries, the company is an independent exploration and production company engaged in the acquisition, exploration and development of properties to produce oil, natural gas and natural gas liquid from underground reservoirs. The company owns a portfolio of onshore U.S. liquids and natural gas assets. The company has positions in the resource plays of the Eagle Ford Shale in South Texas, the stacked pay in the Powder River Basin in Wyoming and the Anadarko Basin in northwestern Oklahoma. The company's natural gas resource plays are the Marcellus Shale in the northern Appalachian Basin in Pennsylvania and the Haynesville/Bossier Shales in northwestern Louisiana.

Devon Energy is an independent energy company engaged primarily in the exploration, development and production of oil, natural gas and natural gas liquids. The company's operations are concentrated in various onshore areas in United States. The company's areas of operation include Delaware Basin, Eagle Ford, Powder River Basin and the STACK development, located primarily in Oklahoma's Canadian, Kingfisher and Blaine counties.

EP Energy is an independent exploration and production company engaged in the acquisition and development of unconventional onshore oil and natural gas properties. The company operates through a base of producing assets and is focused on the development of its drilling inventory located in three areas: Eagle Ford Shale in South Texas, Northeastern Utah, in the Uinta basin, and the Permian basin in West Texas.

Marathon Oil is an independent exploration and production company focused on the United States resource plays. The company also has international operations in Equatorial Guinea (E.G.). The company's segments are: United States, which explores for, produces and markets crude oil and condensate, natural gas liquids (NGLs) and natural gas in the United States; and International, which explores for, produces and markets crude oil and condensate, NGLs and natural gas outside of the United States as well as produces and markets products manufactured from natural gas, such as liquefied natural gas and methanol, in E.G.

Matador Resources is an independent energy company engaged in the exploration, development, production and acquisition of oil and natural gas resources in the United States, with a focus on oil and natural gas shale and other unconventional plays. The company's operations are focused on the oil and liquids-rich portion of the Wolfcamp and Bone Spring plays in the Delaware Basin in Southeast New Mexico and West Texas. The company also operates in the Eagle Ford shale play in South Texas and the Haynesville shale and Cotton Valley plays in Northwest Louisiana. Also, the company conducts midstream operations, through its midstream joint venture, San Mateo Midstream, LLC together with San Mateo Midstream II, LLC.

Murphy Oil is a holding company. Through its subsidiaries, the company is an oil and natural gas exploration and production company. The company explores for and produces crude oil, natural gas and natural gas liquids worldwide. The company's principal exploration and production activities are conducted in United States by wholly owned Murphy Exploration & Production Company - USA and its subsidiaries, in Canada by wholly-owned Murphy Oil Company Ltd. and its subsidiaries, and in Australia, Brazil, Brunei, Mexico and Vietnam by wholly-owned Murphy Exploration & Production Company - International and its subsidiaries. The company's hydrocarbon production is in United States, Canada and Brunei.