Valero owns oil refineries in the U.S., Canada, and the U.K. which produce fuel and other petroleum products, related logistics assets, and ethanol plants.
How Polling Drives the Rankings
Each year, we ask Americans what matters most to them when it comes to business behavior. The results drive how we track, analyze, and rank companies. Learn more about polling.
Have questions about our research and rankings? We want to hear from you!