Exxon Mobil Corporation explores for and produces crude oil and natural gas in the United States, Canada/other Americas, Europe, Africa, Asia, and Australia/Oceania.
Chevron Corporation, through its subsidiaries, engages in integrated energy, chemicals, and petroleum operations worldwide.
ConocoPhillips explores for, produces, transports, and markets crude oil, bitumen, natural gas, liquefied natural gas (LNG), and natural gas liquids worldwide.
Kinder Morgan, Inc. operates as an energy infrastructure company in North America.
Weatherford International plc, an oilfield service company, provides equipment and services for the drilling, evaluation, completion, production, and intervention of oil and natural gas wells worldwide.
EOG Resources, Inc., together with its subsidiaries, explores for, develops, produces, and markets crude oil, and natural gas and natural gas liquids.
Schlumberger Limited supplies technology for reservoir characterization, drilling, production, and processing to the oil and gas industry worldwide.
The Williams Companies, Inc., together with its subsidiaries, operates as an energy infrastructure company primarily in the United States.
Valero Energy Corporation manufactures and sells transportation fuels and petrochemical products in the United States, Canada, the United Kingdom, Ireland, and internationally.
Marathon Petroleum Corporation, together with its subsidiaries, engages in refining, marketing, retailing, and transporting petroleum products primarily in the United States.
Pioneer Natural Resources Company operates as an independent oil and gas exploration and production company in the United States.
Occidental Petroleum Corporation, together with its subsidiaries, engages in the acquisition, exploration, and development of oil and gas properties in the United States, the Middle East, and Latin America.
Baker Hughes Company provides a portfolio of technologies and services worldwide.
Hess Corporation, an exploration and production company, explores, develops, produces, purchases, transports, and sells crude oil, natural gas liquids (NGLs), and natural gas.