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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.
Big West Oil LLC is a wholly owned subsidiary of Flying J Inc. Big West operates a 31,000 barrel per day refinery located in North Salt Lake, Utah. The refinery processes crude oils produced in Utah, Wyoming, Colorado, and Canada. Big West produces a
Royal Waste Services Inc is a Hollis, NY-based company in the Energy and Utilities sector.
Centaurus Energy is an Argentine upstream oil and gas company that explores, develops, and produces crude oil, natural gas liquids, and natural gas.