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Alcoa Corporation, together with its subsidiaries, produces and sells bauxite, alumina, and aluminum products in the United States, Spain, Australia, Iceland, Norway, Brazil, Canada, and internationally. The company operates through two segments, Alumina and Aluminum. It engages in bauxite mining operations; and processes bauxite into alumina and sells it to customers who process it into industrial chemical products, as well as aluminum smelting and casting businesses. The company offers primary aluminum in the form of alloy ingot or value-add ingot to customers that produce products for the transportation, building and construction, packaging, wire, and other industrial markets; and flat-rolled aluminum in the form of sheet, which is sold primarily to customers that produce beverage and food cans. In addition, it owns hydro power plants that generates and sells electricity in the wholesale market to traders, large industrial consumers, distribution companies, and other generation companies. The company was formerly known as Alcoa Upstream Corporation and changed its name to Alcoa Corporation in October 2016. The company was founded in 1886 and is headquartered in Pittsburgh, Pennsylvania.

Aluminum Corporation of China Limited, together with its subsidiaries, manufactures and sells alumina, primary aluminum, aluminum alloys, and carbon products in the People's Republic of China and internationally. The company operates through five segments: Alumina, Primary Aluminum, Trading, Energy, and Corporate and Other Operating. The Alumina segment mines for and purchases bauxite and other raw materials; refines bauxite into alumina; and produces and sells alumina, as well as refined alumina, gallium, and multi-form alumina bauxite. The Primary Aluminum segment procures alumina and other raw materials, supplemental materials, and electrical power; and produces and sells aluminum and aluminum-related products, such as carbon, aluminum alloy, and other electrolytic aluminum products. The Trading segment trades in alumina, primary aluminum, aluminum fabrication products, other non-ferrous metal products, coal products, and raw and supplemental materials; and provides logistics and transport services to external customers. The Energy segment mines for coal deposits; generates and sells electricity using thermal, wind, and solar power sources to regional power grid corporations; and manufactures power related equipment. The Corporate and Other Operating segment provides research and development services; and operates other aluminum-related business activities. The company also acquires, manufactures, and distributes bauxite mines and limestone ore; and provides engineering project management, as well as engages in import and export activities. Aluminum Corporation of China Limited was incorporated in 2001 and is headquartered in Beijing, the People's Republic of China.

Century Aluminum Company, together with its subsidiaries, engages in the production of standard-grade and value-added primary aluminum products in the United States and Iceland. It also owns and operates an alumina production facility in Iceland, and a carbon anode production facility in the Netherlands. The company was founded in 1995 and is headquartered in Chicago, Illinois.

Kaiser Aluminum Corporation, together with its subsidiaries, engages in manufacture and sale of semi-fabricated specialty aluminum mill products in the United States and internationally. It offers rolled, extruded, and drawn aluminum products used for aerospace and defense, aluminum beverage and food packaging, automotive and general engineering products. The company's automotive extrusions include extruded aluminum products for structural components, crash management systems, anti-lock braking systems, and drawn tubes for drive shafts, as well as offers fabrication services, including sawing and cutting to length. Its packaging products consist of bare and coated 3000- and 5000-series alloy aluminum coil used for beverage and food packaging industry. In addition, the company's general engineering products comprise alloy plate, sheet, rod, bar, tube, wire, and standard extrusion shapes used in various applications, including the production of military vehicles, ordnances, semiconductor manufacturing cells, electronic devices, after-market motor sport parts, tooling plates, parts for machinery and equipment, bolts, screws, nails, and rivets. Further, its rerolled, extruded, drawn, and cast billet aluminum products used for industrial end uses. The company sells its products directly to customers through sales personnel located in the United States, Canada, Western Europe, and China, as well as through independent sales agents in other regions of Asia, Latin America, and the Middle East. Kaiser Aluminum Corporation was founded in 1946 and is headquartered in Franklin, Tennessee.