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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.
Petrochem Field Services Inc is a Humble, TX-based company in the Energy and Utilities sector.
Arco Building Systems is a Norcross, GA-based company in the Energy and Utilities sector.
Belden and Blake Corp. is engaged in the acquisition, exploration, development, and production of oil and gas reserves, and the gathering and marketing of natural gas. (Source: 10-K)
American Liberty Oil Company is a Kaufman, TX-based company in the Energy and Utilities sector.