Valero Energy Corporation is a United States refining company that operates in two business segments: refining and retail. Valero's refining segment includes refinery, wholesale marketing, product supply and distribution, and transportation operations. The refining segment is segregated geographically into the Gulf Coast, Mid-Continent, West Coast and Northeast regions. Valero's retail segment includes Company-operated convenience stores, Canadian dealers/jobbers, truckstop facilities, cardlock and home heating oil operations. Valero also has a logistics system that complements its refining and marketing assets in the United States Gulf Coast and Mid-Continent regions.