ExxonMobil Beaumont, Texas

ExxonMobil operates a large refinery in Beaumont, which can process up to 365,000 barrels of oil per day, and up to 2.8 billion gallons of gasoline annually. One of seven refineries operated by the company in the U.S. as of 2014, which includes those found in Torrance, CA; Joliet, IL; Baton Rouge, LA; Chalmette, LA; Billings, MT; and the nation's second largest refinery in Baytown, Texas. ExxonMobil is headquartered in Irving, outside Dallas.