Tesoro Corporation (Tesoro) is an independent petroleum refining, logistics and marketing company. he Company operates through three segments. The Refining operating segment refines crude oil and other feedstocks into transportation fuels, such as gasoline and gasoline blendstocks, 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 range of customers within its markets. The TLLP segment comprises Tesoro Logistics LP's (TLLP) assets and operations, and includes certain crude oil and natural gas gathering assets, natural gas and natural gas liquids (NGLs) processing assets, and crude oil and refined products terminaling, transportation and storage assets acquired from Tesoro and third parties. The marketing segment sells transportation fuels through branded and unbranded channels.