CF Industries Holdings, Inc., together with its subsidiaries, engages in the manufacture and sale of hydrogen and nitrogen products for energy, fertilizer, emissions abatement, and other industrial activities in North America, Europe, and internationally. It operates through Ammonia, Granular Urea, UAN, AN, and Other segments. The company's principal products include anhydrous ammonia, granular urea, urea ammonium nitrate, and ammonium nitrate products. It also offers diesel exhaust fluid, urea liquor, nitric acid, and aqua ammonia products. The company primarily serves cooperatives, independent fertilizer distributors, traders, wholesalers, and industrial users. CF Industries Holdings, Inc. was founded in 1946 and is headquartered in Northbrook, Illinois.

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.

Hecla Mining Company, together with its subsidiaries, provides precious and base metal properties in the United States, Canada, Japan, Korea, and China. The company mines for silver, gold, lead, and zinc concentrates, as well as carbon material containing silver and gold for custom smelters, metal traders, and third-party processors; and doré containing silver and gold. It flagship project is the Greens Creek mine located on Admiralty Island in southeast Alaska. Hecla Mining Company was incorporated in 1891 and is headquartered in Coeur d'Alene, Idaho.

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.

Ryerson Holding Corporation, together with its subsidiaries, processes and distributes industrial metals in the United States and internationally. It offers a line of products in carbon steel, stainless steel, alloy steels, and aluminum, as well as nickel and red metals in various shapes and forms, including coils, sheets, rounds, hexagons, square and flat bars, plates, structural, and tubing. The company also provides processing services. It serves various industries, including metal fabrication and machine shops, industrial machinery and equipment, commercial ground transportation, consumer durable equipment, food processing and agricultural equipment, construction equipment, oil and gas, and HVAC manufacturing. Ryerson Holding Corporation was founded in 1842 and is headquartered in Chicago, Illinois.

Algoma Steel Group Inc. produces and sells steel products primarily in North America. The company provides flat/sheet steel products, including temper rolling, cold rolled, hot-rolled pickled and oiled products, floor plate, and cut-to-length products for the automotive industry, hollow structural product manufacturers, and the light manufacturing and transportation industries; and plate steel products that consist of rolled, hot-rolled, and heat-treated for use in the construction or manufacture of railcars, buildings, bridges, off-highway equipment, storage tanks, ships, and military applications, as well as energy and mining applications. Algoma Steel Group Inc. was founded in 1901 and is headquartered in Sault Ste. Marie, Canada.

Mayville Engineering Company, Inc., together with its subsidiaries, engages in the production, design, prototyping and tooling, fabrication, aluminum extrusion, coating, and assembling of aftermarket components in the United States. It also supplies engineered components to original equipment manufacturers. The company serves heavy and medium duty commercial vehicles, construction and access equipment, powersports, agriculture, military, and other end markets. Mayville Engineering Company, Inc. was founded in 1945 and is headquartered in Milwaukee, Wisconsin.

Superior Industries International, Inc., together with its subsidiaries, designs, manufactures, and sells aluminum wheels to the original equipment manufacturers and aftermarket distributors in North America and Europe. It offers its products under the ATS, RIAL, ALUTEC, and ANZIO brand names. The company was founded in 1957 and is headquartered in Southfield, Michigan.