Valero Energy Corp. engages in the manufacture and marketing of transportation fuels and other petrochemical products. The company is headquartered in San Antonio, Texas and currently employs 9,886 full-time employees. The firm sells its products primarily in the United States, Canada, the United Kingdom, Ireland and Latin America. The firm operates through three segments: Refining, Renewable Diesel, and Ethanol. The Refining segment includes the operations of its petroleum refineries, the associated activities to market its refined petroleum products, and the logistics assets that support those operations. The Renewable Diesel segment includes the operations of Diamond Green Diesel (DGD) and the associated activities to market renewable diesel and renewable naphtha. The Ethanol segment includes the operations of its ethanol plants and the associated activities to market its ethanol and co-products. The firm owns over 15 petroleum refineries located in the United States, Canada and the United Kingdom.