BP Westlake Campus

BP, until recently known as British Petroleum, has its largest American presence in an expanding corporate campus on the I-10 Energy Corridor west of Houston. BP is the third largest of the supermajor oil companies (after ExxonMobil and Shell). It is the largest shareholder of the Alaska Pipeline, and operates five refineries in the United States. The company's refining and chemical center in Texas City is one of the largest petrochemical complexes in the world.