Chevron is the second-largest integrated energy giant that’s based in the U.S., with an exploration and production arm as well as a refining and retail segment. Its products are sold at more than 8,000 Chevron and Texaco gas stations in the U.S. As an oil major, its operations also span the globe. The company changed its name to Chevron from ChevronTexaco in 2005.
Artur Widak—NurPhoto/Getty Images