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GBE Services Corp is a Tulsa, OK-based company in the Energy and Utilities sector.
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.
Kelley-Williamson Company is a Rockford, IL-based company in the Energy and Utilities sector.
Encana Corporation is a company engaged in hydrocarbon exploration.
Jet X Inc is a Raccoon, KY-based company in the Energy and Utilities sector.