Western Refining, Inc., is a Texas-based Fortune 200 and Global 2000 crude oil refiner and marketer operating primarily in the Southwestern, North-Central and Mid-Atlantic regions of the United States. Western Refining (WNR) has been publicly traded on the New York Stock Exchange since January 2006 and is the fourth largest publicly traded independent refiner and marketer in the nation. Western Refining has been acquired by Tesoro another independent petroleum Refining and marketing corporation.