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Chevron Corporation, through its subsidiaries, engages in the integrated energy and chemicals operations in the United States and internationally. The company operates in two segments, Upstream and Downstream. The Upstream segment is involved in the exploration, development, production, and transportation of crude oil and natural gas; processing, liquefaction, transportation, and regasification of liquefied natural gas; transportation of crude oil through pipelines; transportation, storage, and marketing of natural gas; and carbon capture and storage, as well as a gas-to-liquids plant. The Downstream segment refines crude oil into petroleum products; markets crude oil, refined products, and lubricants; manufactures and markets renewable fuels, commodity petrochemicals, plastics for industrial uses, and fuel and lubricant additives; and transports crude oil and refined products by pipeline, marine vessel, motor equipment, and rail car. The company was formerly known as ChevronTexaco Corporation and changed its name to Chevron Corporation in 2005. Chevron Corporation was founded in 1879 and is headquartered in San Ramon, California.

Hess Corporation, an exploration and production company, explores, develops, produces, purchases, transports, and sells crude oil, natural gas liquids (NGLs), and natural gas. The company operates in two segments, Exploration and Production, and Midstream. It conducts production operations primarily in the United States, Guyana, the Malaysia/Thailand Joint Development Area, and Malaysia; and exploration activities principally offshore Guyana, the U.S. Gulf of Mexico, and offshore Suriname and Canada. The company is also involved in gathering, compressing, and processing natural gas; fractionating NGLs; gathering, terminaling, loading, and transporting crude oil and NGL through rail car; and storing and terminaling propane, as well as providing water handling services primarily in the Bakken Shale plays in the Williston Basin area of North Dakota. The company was incorporated in 1920 and is headquartered in New York, New York.

Murphy Oil Corporation, together with its subsidiaries, operates as an oil and gas exploration and production company in the United States, Canada, and internationally. It explores for and produces crude oil, natural gas, and natural gas liquids. The company was formerly known as Murphy Corporation and changed its name to Murphy Oil Corporation in 1964. The company was incorporated in 1950 and is headquartered in Houston, Texas.

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 North Africa. It operates through three segments: Oil and Gas, Chemical, and Midstream and Marketing. The company's Oil and Gas segment explores for, develops, and produces oil and condensate, natural gas liquids (NGLs), and natural gas. Its Chemical segment manufactures and markets basic chemicals, including chlorine, caustic soda, chlorinated organics, potassium chemicals, ethylene dichloride, chlorinated isocyanurates, sodium silicates, and calcium chloride; and vinyls comprising vinyl chloride monomer, polyvinyl chloride, and ethylene. The Midstream and Marketing segment gathers, processes, transports, stores, purchases, and markets oil, condensate, NGLs, natural gas, carbon dioxide, and power. This segment also invests in entities. Occidental Petroleum Corporation was founded in 1920 and is headquartered in Houston, Texas.