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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.
Fannon Petroleum Services is a Gainesville, VA-based company in the Energy and Utilities sector.
Panther Energy Company LLC is a Tulsa, OK-based company in the Energy & Utilities sector.
Upside Engineering is a Calgary, AB-based company in the Energy & Utilities sector.