Tesoro Corporation (Tesoro) is an independent petroleum refining and marketing company. The Company operates through three business segments: Refining operating segment (Refining), which owns and operates refineries, and refines crude oil and other feedstocks into transportation fuels; TLLP, a publicly traded limited partnership, which includes certain crude oil and natural gas gathering assets, natural gas processing and crude oil and refined products terminaling, and transportation and storage assets, and marketing segment (Marketing), which sells transportation fuels. The Company's Refining segment owns and operates approximately six petroleum refineries with a combined crude oil capacity of over 850 thousand barrels per day (Mbpd). TLLP's business operates in three segments: Gathering, Processing, and Terminalling and Transportation. The Marketing segment sells transportation fuels in approximately 20 states through a network of approximately 2,270 retail stations.