Valero Energy Corp. engages in the manufacture and marketing of transportation fuels and other petrochemical products. It operates through the Refining and Ethanol segments. The Refining segment includes refining operations, associated marketing activities, and logistics assets that support its refining operations. The Ethanol segment includes its ethanol operations, associated marketing activities, and logistics assets that support its ethanol operations. The company was founded on January 1, 1980 and is headquartered in San Antonio, TX.