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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.

Mansfelder Metals, Ltd., through its subsidiaries, engages in the manufacture and trading of aluminum products. The company's products include aluminum sheets, foils, strips, and blanks for use by industrial and commercial fabricators of aluminum products. It also produces aluminum foil for food and beverage packaging, pharmaceutical packaging, and technical applications. Mansfelder Metals, Ltd. was formerly known as Cathay Merchant Group, Inc. and it changed its name to Mansfelder Metals, Ltd. in 2004. The company was incorporated in 1977 and is based in Central, Hong Kong.

Noranda Aluminum Holding Corporation produces and sells primary aluminum, alumina, bauxite, and rolled aluminum coils in the United States. The company's Bauxite segment mines, produces, and sells bauxite used for alumina production. Its Alumina segment refines and converts bauxite into alumina, which is used in the production of primary aluminum; and sells smelter grade alumina and alumina hydrate, or chemical-grade alumina. The company's Primary Aluminum segment produces and sells aluminum products in various forms, such as billets, rods, sow and foundry, and commodity grade sow. Its Flat-Rolled Products segment primarily produces rolled aluminum products, including finstock for use in commercial, residential, and automotive applications; container stock for pre-packaged foods; converter foils for food, drink, agricultural, and industrial products; and transformer windings used as conducting medium. The company sells its products to original equipment manufacturers of air conditioners, transformers, semi-rigid containers, and foil packaging. The company was founded in 2007 and is headquartered in Franklin, Tennessee.