Andeavor (formerly known as Tesoro Corporation) is an integrated petroleum refining, logistics, and marketing company. The company is engaged in the procurement of crude oil at its source or from other third parties, transporting the crude oil to its refineries, and producing, marketing, and distribution of refined products. It owns and operates networks of crude oil, refined products, and natural gas pipelines, terminals with crude oil and refined products storage capacity, rail loading and offloading facilities, marine terminals including storage, bulk petroleum distribution facilities, a trucking fleet and natural gas processing and fractionation complexes.