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Marathon Oil Corporation (NYSE: MRO) is an independent international exploration and production company. Based in Houston, Texas, Marathon Oil had net proved reserves at the end of 2011 of 1.8 billion barrels of oil equivalent in North America, Europe and Africa.
March Resources Co is a Houston, TX-based company in the Energy & Utilities sector.
Cenovus Energy Inc. is a Canadian integrated oil and natural gas company. It is committed to maximizing value by sustainably developing its assets in a safe, innovative and cost-efficient manner, integrating environmental, social and governance considerations into its business plans. Operations include oil sands projects in northern Alberta, which use specialized methods to drill and pump the oil to the surface, and established natural gas and oil production in Alberta and British Columbia. The company also has 50% ownership in two U.S. refineries. Cenovus shares trade under the symbol CVE, and are listed on the Toronto and New York stock exchanges.
Five Star Rig and Supply is a Oklahoma City, OK-based company in the Energy and Utilities sector.
Panther Energy Company LLC is a Tulsa, OK-based company in the Energy & Utilities sector.