Tesoro is a petroleum refining, logistics and marketing company. Co.'s business is organized into three segments: refining, which 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; logistics, which is comprised of Tesoro Logistics LP's assets and operations, including certain crude oil and natural gas gathering assets, natural gas and natural gas liquids processing assets, and crude oil and refined products terminalling, transportation and storage assets acquired from Co. and third parties; and marketing, which sells transportation fuels through branded and unbranded channels.