Valero Energy Corporation operates as an independent petroleum refining and marketing company in the United States, Canada, the Caribbean, the United Kingdom, and Ireland. It operates through two segments, Refining and Ethanol. The Refining segment is involved in refining, wholesale marketing, product supply and distribution, and transportation operations. This segment produces conventional and premium gasolines, gasoline meeting the specifications of the California Air Resources Board (CARB), reformulated gasoline blendstock for oxygenate blending, diesel fuels, low-sulfur and ultra-low-sulfur diesel fuels, CARB diesel fuel, distillates, jet fuels, asphalts, petrochemicals, lubricants, and other refined products. The Ethanol segment produces and sells ethanol and distillers grains. The company markets its refined products through bulk and rack marketing network; and through approximately 7,400 outlets under the Valero, Diamond Shamrock, Shamrock, Ultramar, Beacon, Texaco, and other names. As of December 31, 2014, it owned 15 petroleum refineries with a combined throughput capacity of approximately2.9 million barrels per day. Valero Energy Corporation also owns and operates 11 ethanol plants with a combined ethanol production capacity of approximately 1.3 billion gallons per year. The company was formerly known as Valero Refining and Marketing Company and changed its name to Valero Energy Corporation in August 1997. Valero Energy Corporation was founded in 1955 and is based in San Antonio, Texas.