Tesoro Corp. engages in the refining and marketing of petroleum products. The company operates through the following segments: Refining, Logistics and Marketing. The Refining segment refines crude oil and other feed stocks into transportation fuels, such as gasoline and gasoline blend stocks, jet fuel and diesel fuel, as well as other products, including heavy fuel oils, liquefied petroleum gas and petroleum coke for sale in bulk markets to a wide variety of customers within Tesoro's markets. The Logistics segment includes crude oil and natural gas gathering assets, natural gas and natural gas liquid processing assets, and crude oil and refined products terminalling, transportation and storage assets acquired from Tesoro and third parties. The Marketing segment sells transportation fuels through branded and unbranded channels. Its brand portfolio includes ARCO, Shell, Exxon, Mobil, USA Gasoline, Rebel and Tesoro. Tesoro was founded by West V. Robert, Jr. in 1968 and is headquartered in San Antonio, TX.