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Walworth is a Stafford, TX-based company in the Energy and Utilities sector.
Torrent Energy Services is a premier midstream services company offering solutions focused on assisting oil and gas producers capture and process natural gas, NGLs and oil.
Export Drilling International is a Whittier, CA-based company in the Energy and Utilities sector.
Weatherford International is a Kingwood, TX-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.