Valero Energy Corporation is an independent petroleum refining and marketing company.
Marathon Petroleum Corporation (MPC) is one of the largest petroleum refiners, marketers and transporters in the United States.
ConocoPhillips uses its pioneering spirit to responsibly deliver energy to the world.
Hess is a global independent energy company primarily engaged in the exploration and production of crude oil and natural gas.
Noble Energy is an independent oil and natural gas exploration and production company.
Apache Corporation is an independent energy company that explores, develops and produces natural gas, crude oil and natural gas liquids.
National Oilwell Varco is a company specializing in the design, manufacture and sale of equipment and components used in oil and gas drilling.
Marathon Oil Corporation is an independent global exploration and production company.
Concho Resources is an independent oil and natural gas company engaged in the acquisition, development and exploration of oil and natural gas properties.
Baker Hughes, a GE company (BHGE) is an international industrial and oil field service company.
Pioneer Natural Resources is a large independent exploration and production company with operations in the United States.
Chesapeake Energy is a petroleum and natural gas exploration and production company.