Oil companies

ConocoPhillips is an exploration and production company focused on proven reserves and production of liquid and natural gas.

Marathon Petroleum Corporation (MPC) is a petroleum product refining, marketing, retail, and midstream company.

Cenovus Energy is an oil company that provides oil sands projects which use specialized methods to drill and pump oil.

Marathon Oil is an oil and natural gas exploration and production company.

Saudi Arabian Oil Company (Saudi Aramco) is an integrated energy and chemicals company.

Chesapeake Energy is a petroleum and natural gas exploration and production company.

Hess is an exploration and production company that develops, produces, purchases, transports, and sells crude oil, natural gas liquids, and natural gas.

Glencore (formerly known as Glencore Xstrata) is a natural resources company that specializes in the production, refinement, processing, storage, transport, and marketing of metals, minerals, and energy products

BHP is a company that engages in the natural resources business.

Neste is a company creating sustainable solutions for transport, aviation, polymers, and chemicals sectors.

Nabors is a company that owns and operates land-based drilling rig fleets and provides offshore platform rigs.

Valero Energy is a manufacturer and marketer of transportation fuels and petrochemical products.