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Porta Gas Inc is a Houston, TX-based company in the Energy and Utilities sector.
Clay Petroleum Group is a Middleburg, FL-based company in the Energy & Utilities sector.
Consolidated Pressure Control is a Houston, TX-based company in the Energy and Utilities sector.
Harvard Corporation is a Evansville, WI-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.