Headquartered in San Antonio, Texas, Tesoro Corporation was originally founded in 1968. Tesoro is primarily invested into the refinement and marketing of petroleum related products. The company has assets in the form of six refineries, all located in the United States. Tesoro is listed as a Fortune 500 company, and recorded a total turnover of $37 billion in the year, 2013. Statistics from 2013 also indicate that the company has a total workforce of 5,700. Tesoro’s six refineries are capable of producing around 845,000 barrels of oil per day.
As a retailer, Tesoro has over 2,200 gas outlets, many of which operate under brand names like Shell, Exxon, ARCO, Mobil and USA Gasoline.
The company was founded by Dr. Robert V. West in 1968, and initially dealt solely with oil and natural gas exploration. However, the company experienced its most significant period of growth in the 1990s, as a result of a number of refinery acquisitions.