Chevron is an energy and technology company.
Valero Energy is a petroleum refining and marketing company.
Marathon Petroleum Corporation (MPC) is a petroleum product refining, marketing, retail, and midstream company.
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.
ConocoPhillips is an independent exploration and production company focused on proven reserves and production of liquid and natural gas.
Newpark Resources is a provider of drilling fluids systems and composite matting systems used in oilfield and other commercial markets.
Marathon Oil is an independent oil and natural gas 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.
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.