Tesoro Corporation (Tesoro), is an independent petroleum refiners and marketers in the United States. The Company�s subsidiaries, operating through two business segments: manufacture and sell transportation fuels. Its refining operating segment (refining), which operates seven refineries in the western United States, refines crude oil and other feedstocks into transportation fuels, such as gasoline, gasoline blendstocks, jet fuel and diesel fuel, as well as other products, including heavy fuel oils, liquefied petroleum gas, petroleum coke and asphalt. Its retail operating segment (retail) sells transportation fuels and convenience products In September 2013, the Company announced that it has completed the sale of all of its interests in Tesoro Hawaii, LLC to Hawaii Pacific Energy, LLC. In December 2013, Tesoro Corp closed the acquisition of the majority of the remaining Los Angeles logistics assets.