High Quality Content by WIKIPEDIA articles! Valero Energy Corporation (NYSE: VLO) is a Fortune 500 international manufacturer and marketer of transportation fuels, other petrochemical products, and power based in San Antonio, Texas, United States. The company owns and operates 15 refineries throughout the United States, Canada, United Kingdom, and the Caribbean with a combined throughput capacity of approximately 2.9 million barrels (460,000 m3) per day, 11 ethanol plants with a combined production capacity of 1.1 billion US gallons (4,200,000 m3) per year, and a 50-megawatt wind farm. Valero is also one of the United States` largest retail operators with approximately 6,800 retail and branded wholesale outlets in the United States, Canada, United Kingdom, and the Caribbean under the Valero, Diamond Shamrock, Shamrock, Ultramar, Beacon, and Texaco brands.