Canadian Natural Resources Limited acquires, explores for, develops, produces, markets, and sells crude oil, natural gas, and natural gas liquids (NGLs). The company offers light and medium crude oil, primary heavy crude oil, Pelican Lake heavy crude oil, bitumen (thermal oil), and synthetic crude oil (SCO). The company's midstream assets include two pipeline systems; and a 50% working interest in an 84-megawatt cogeneration plant at Primrose. It operates primarily in Western Canada; the United Kingdom portion of the North Sea; and Offshore Africa. The company was formerly known as AEX Minerals Corporation and changed its name to Canadian Natural Resources Limited in December 1975. Canadian Natural Resources Limited was incorporated in 1973 and is headquartered in Calgary, Canada.

Vermilion Energy Inc., together with its subsidiaries, engages in the acquisition, exploration, development, and production of petroleum and natural gas. The company has properties in West Central Alberta, southeast Saskatchewan, Manitoba, and West Pembina in Canada; Wyoming in the United States; southwest Bordeaux and Paris Basin in France; the Netherlands; Germany; Ireland; Croatia; Slovakia; and Australia. The company was founded in 1994 and is headquartered in Calgary, Canada.

VAALCO Energy, Inc., an independent energy company, engages in the acquisition, exploration, development, and production of crude oil, natural gas, and natural gas liquids in Gabon, Egypt, Equatorial Guinea, and Canada. The company holds 58.8% interest in the Etame production sharing contract related to the Etame Marin block covering an area of approximately 46,200 gross acres located offshore in the Republic of Gabon in West Africa. It also owns 100% interest in the Eastern Desert, which contains West Gharib, West Bakr and North West Gharib merged concessions covering as area of approximately 45,067 acres, as well as Western Desert, which contains the South Ghazalat concession covering as area of approximately 7,340 acres located in Egypt. In addition, the company production and working interests in Cardium light oil and Mannville liquids-rich gas assets covering as area of 47,400 gross acres located near the north of Calgary, Alberta; and an undeveloped block offshore Equatorial Guinea, West Africa. VAALCO Energy, Inc. was incorporated in 1985 and is headquartered in Houston, Texas.

Epsilon Energy Ltd., a North American onshore independent natural gas and oil company, engages in the acquisition, development, gathering, and production of natural oil and gas reserves in the United States. The company operates through Upstream and Gathering System segments. It has natural gas production in the Marcellus Shale in Pennsylvania; and oil, natural gas liquids, and natural gas production in the Permian Basin in Texas and New Mexico, and Anadarko Basin in Oklahoma. Epsilon Energy Ltd. was incorporated in 2005 and is based in Calgary, Canada.

Amplify Energy Corp., together with its subsidiaries, engages in the acquisition, development, exploitation, and production of oil and natural gas properties in the United States. The company's properties consist of operated and non-operated working interests in producing and undeveloped leasehold acreage, as well as working interests in identified producing wells located in Oklahoma, the Rockies, federal waters offshore Southern California, East Texas/North Louisiana, and Eagle Ford. The company is based in Houston, Texas.

U.S. Energy Corp., an independent energy company, focuses on the acquisition, exploration, and development of oil and natural gas properties in the United States. It holds interests in various oil and gas properties located in the Rockies region, including Montana, Wyoming, and North Dakota; the Mid-Continent region comprising Oklahoma, Kansas, and North and East Texas; West Texas; South Texas; and the Gulf Coast regions. The company was incorporated in 1966 and is headquartered in Houston, Texas.

Crescent Point Energy Corp. explores, develops, and produces oil and gas properties in Canada and the United States. The company focuses on crude oil, tight oil, natural gas liquids, shale gas, and natural gas reserves. Its properties are located in the provinces of Saskatchewan, Alberta, British Columbia, and Manitoba; and the states of North Dakota. Crescent Point Energy Corp. was incorporated in 1994 and is headquartered in Calgary, Canada.

Enerplus Corporation, together with its subsidiaries, explores and develops crude oil and natural gas in the United States. Its oil and natural gas properties are located primarily in North Dakota, Colorado, and Pennsylvania. The company was founded in 1986 and is headquartered in Calgary, Canada.