ArcelorMittal S.A., together with its subsidiaries, operates as integrated steel and mining companies in the United States, Europe, and internationally. It offers semi-finished flat products, including slabs; finished flat products comprising plates, hot- and cold-rolled coils and sheets, hot-dipped and electro-galvanized coils and sheets, tinplate, and color coated coils and sheets; semi-finished long products, such as blooms and billets; finished long products consisting of bars, wire-rods, structural sections, rails, sheet piles, and wire-products; and seamless and welded pipes and tubes. The company also provides mining products, such as iron ore lumps, fines, concentrates, pellets, and sinter feeds; and coking coal. It sells its products to various customers in the automotive, appliance, engineering, construction, energy, and machinery industries through a centralized marketing organization, as well as distributors. The company has iron ore mining activities in Brazil, Bosnia, Canada, Liberia, Mexico, South Africa, and Ukraine. ArcelorMittal S.A. was founded in 1976 and is headquartered in Luxembourg City, Luxembourg.

Steel Dynamics, Inc., together with its subsidiaries, operates as a steel producer and metal recycler in the United States. The Steel Operations segment offers hot rolled, cold rolled, and coated steel products; parallel flange beams and channel sections, flat bars, large unequal leg angles, and reinforcing steel bars, as well as standard strength carbon, intermediate alloy hardness, and premium grade rail products; engineered special-bar-quality products, merchant-bar-quality products, and other engineered round steel bars; channels, angles, flats, merchant rounds, and reinforcing steel bars; and specialty shapes and light structural steel products. This segment also engages in turning, polishing, straightening, chamfering, precision saw-cutting, and heat treating of bar products. Its products are used in construction, automotive, manufacturing, transportation, heavy and agriculture equipment, and pipe and tube markets. The Metals Recycling Operations segment is involved in the ferrous and nonferrous scrap metal processing, transportation, marketing, brokerage, and scrap management services. Its ferrous products include heavy melting steel, busheling, bundled scrap, shredded scrap, steel turnings, and cast-iron products; and nonferrous products comprise aluminum, brass, copper, stainless steel, and other nonferrous metals. The Steel Fabrication Operations segment produces steel non-residential building components, such as steel joists, girders, trusses, and steel deck products for non-residential steel fabricators, metal building companies, general construction contractors, developers, owners, brokers, and governmental entities, as well as e-commerce warehouses, data centers, metal buildings, and education and commercial building projects. The Aluminum Operations segment offers recycled aluminum flat rolled products. The company also exports its products. Steel Dynamics, Inc. was founded in 1993 and is headquartered in Fort Wayne, Indiana.

Simpson Manufacturing Co., Inc., through its subsidiaries, designs, engineers, manufactures, and sells structural solutions for wood, concrete, and steel connections. The company offers wood construction products, including connectors, truss plates, fastening systems, fasteners and shearwalls, and pre-fabricated lateral systems for use in light-frame construction; and concrete construction products comprising adhesives, specialty chemicals, mechanical anchors, carbide drill bits, powder actuated tools, fiber-reinforced materials, and other repair products for use in concrete, masonry, and steel construction, as well as grouts, coatings, sealers, mortars, fiberglass and fiber-reinforced polymer systems, and asphalt products for use in concrete construction repair, and strengthening and protection products. It also provides connectors and lateral products for wood framing, timber and offsite construction, structural steel construction, and cold-formed steel applications; and mechanical and adhesive anchors for concrete and masonry construction applications. In addition, the company offers engineering and design services, as well as software solutions that facilitate the specification, selection, and use of its products. It markets its products to the residential construction, light industrial and commercial construction, infrastructure construction, remodeling, and do-it-yourself markets in the United States, Canada, France, the United Kingdom, Germany, Denmark, Switzerland, Portugal, Poland, the Netherlands, Belgium, Spain, Italy, Romania, Sweden, Norway, Australia, New Zealand, China, Taiwan, and Vietnam. The company was founded in 1956 and is headquartered in Pleasanton, California.

Ternium S.A., together with its subsidiaries, manufactures and distributes steel products in Mexico, Southern Region, Brazil, and internationally. It operates through three segments: Steel, Mining, and Usiminas. The Steel segment offers slabs, hot and cold rolled products, coated products, roll formed and tubular products, bars, billets, and other products. Its Mining segment sells iron ore and pellets. The Usiminas segment offers iron ore extraction, steel transformation, and production of capital goods and logistics; and manufactures and sells various products and raw materials, such as flat steel, iron ore, and stamped steel parts for the automotive industry and products for the civil construction and capital goods industry. It also provides medical and social; scrap; renewable energy; and engineering and other services, as well as operates as a distribution company. In addition, the company engages in the exploration, exploitation, and pelletizing of iron ore. Ternium S.A. was founded in 1961 and is based in Luxembourg City, Luxembourg. Ternium S.A. is a subsidiary of Techint Holdings S.à r.l.

Commercial Metals Company manufactures, recycles, and fabricates steel and metal products, and related materials and services in the United States, Poland, China, and internationally. It operates through three segments: North America Steel Group; Europe Steel Group; and Emerging Businesses Group. The company processes and sells ferrous and nonferrous scrap metals to steel mills and foundries, aluminum sheet and ingot manufacturers, brass and bronze ingot makers, copper refineries and mills, secondary lead smelters, specialty steel mills, high temperature alloy manufacturers, and other consumers. It also manufactures and sells finished long steel products, including reinforcing bar, merchant bar, light structural, and other special sections, as well as semi-finished billets for rerolling and forging applications. In addition, the company provides fabricated rebar used to reinforce concrete primarily in the construction of commercial and non-commercial buildings, hospitals, convention centers, industrial plants, power plants, highways, bridges, arenas, stadiums, and dams; sells and rents construction-related products and equipment to concrete installers and other businesses; and manufactures and sells strength bars for the truck trailer industry, special bar steels for the energy market, and armor plates for military vehicles. Further, it manufactures rebars, merchant bars, and wire rods; and sells fabricated rebars, wire meshes, welded steel mesh, wire rod, cold rolled rebar, cold rolled wire rod, assembled rebar cages and other fabricated rebar by-products to fabricators, manufacturers, distributors, and construction companies. The company was founded in 1915 and is headquartered in Irving, Texas.

Gerdau S.A., together with its subsidiaries, operates as a steel producer company. The company operates through Brazil Business, North America Business, South America Business, and Special Steel Business segments. It also provides semi-finished products, including billets, blooms, and slabs; common long rolled products, such as rebars, wire rods, merchant bars, light shapes, and profiles to the construction and manufacturing industries; drawn products comprising barbed and barbless fence wires, galvanized wires, fences, concrete reinforcing wire mesh, nails, and clamps for manufacturing, construction, and agricultural industries; and special steel products used in auto parts, light and heavy vehicles, and agricultural machinery, as well as in the oil and gas, wind energy, machinery and equipment, mining and rail, and other markets. In addition, the company offers flat products, such as hot-rolled steel coils and heavy plates; and resells flat steel products. Further, it operates mines that produce iron ore located in the Brazilian state of Minas Gerais. The company sells its products through independent distributors, direct sales from the mills, and its retail network. Gerdau S.A. was founded in 1901 and is based in São Paulo, Brazil.

Metallus Inc. manufactures and sells alloy steel, and carbon and micro-alloy steel products in the United States and internationally. The company offers special bar quality (SBQ) bars, seamless mechanical tubes, precision steel components, and billets that are used in gears, hubs, axles, crankshafts and motor shafts, oil country drill pipes, bits and collars, bearing races and rolling elements, bushings, fuel injectors, wind energy shafts, anti-friction bearings, artillery and mortar bodies, and other applications. It also provides custom-make precision steel components. It offers its products and services to the automotive, energy, industrial equipment, mining, construction, rail, aerospace and defense, heavy truck, agriculture, and power generation sectors. The company was formerly known as TimkenSteel Corporation and changed its name to Metallus Inc. in February 2024. Metallus Inc. was founded in 1899 and is headquartered in Canton, Ohio.

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.