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.

Crown Holdings, Inc., together with its subsidiaries, engages in the packaging business in the United States and internationally. It operates through Americas Beverage, European Beverage, Asia Pacific, and Transit Packaging segments. The company manufactures and sells recyclable aluminum beverage cans and ends, glass bottles, steel crowns, aluminum caps, non-beverage cans, and aerosol cans and closures. It also provides manual, semi-automatic, and automatic equipment and tools to apply and remove consumables, such as straps and films; protective solutions, including airbags, edge protectors, and honeycomb products; and steel and plastic consumables include steel strap, plastic strap, industrial film, and other related products. The company serves food industries, including pet food, personal care, household, and industrial products. Crown Holdings, Inc. was founded in 1892 and is headquartered in Yardley, Pennsylvania.

Crane Company, together with its subsidiaries, manufactures and sells engineered industrial products in the United States, Canada, the United Kingdom, Continental Europe, and internationally. The company operates in three segments: Aerospace & Electronics, Process Flow Technologies, and Engineered Materials. The Aerospace & Electronics segment supplies critical components and systems, including original equipment and aftermarket parts for commercial aerospace, as well as the military aerospace, defense, and space markets. This segment also offers pressure sensors for aircraft engine control, aircraft braking systems for commercial aircraft and fighter jets, power conversion solutions for spacecraft, and lubrication systems. The Process Flow Technologies segment provides engineered fluid handling equipment for mission-critical applications. It offers process valves and related products, such as lined pipe, fittings and hoses, air-operated diaphragm and peristaltic pumps, instrumentation and sampling systems, valve positioning and control systems, and valve diagnostic and calibration systems; commercial valves; and pumps and systems. The Engineered Materials segment manufactures fiberglass-reinforced plastic panels and coils for use in the manufacturing of recreational vehicles, as well as in commercial and industrial building applications. This segment sells directly to RV, trailer, and truck manufacturers, as well as through distributors and retailers. The company provides its products and solutions to end markets, including commercial and military aerospace, defense, and space; chemical and pharmaceutical production; water and wastewater; non-residential and municipal construction; energy; and other general industrial and consumer-related applications. The company was formerly known as Crane Holdings, Co. Crane Company was founded in 1855 and is based in Stamford, Connecticut.

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.

Silgan Holdings Inc., together with its subsidiaries, manufactures and sells rigid packaging solutions for consumer goods products in the United States and internationally. It operates through three segments: Dispensing and Specialty Closures, Metal Containers, and Custom Containers. The Dispensing and Specialty Closures segment offers a range of metal and plastic closures, and dispensing systems for food, beverage, health care, garden, home, personal care, beauty products, and hard surface cleaning products, as well as capping/sealing equipment and detection systems. The Metal Containers segment manufactures and sells steel and aluminum containers for food products, such as pet food, vegetables, soups, proteins, fruits, and other miscellaneous food products, as well as general line metal containers primarily for chemicals. The Custom Containers segment manufactures and sells custom designed and stock plastic containers for use in personal care and health care; food and beverage; household and industrial chemical; pharmaceutical; pet food and care; agricultural; automotive. This segment also provides thermoformed barrier and non-barrier bowls, and trays for food products, such as soups, other ready-to-eat meals, and pet food products; and plastic closures, caps, sifters, and fitments, as well as thermoformed tubs for food, household, and personal care products. The company markets its products primarily through direct sales force, as well as through a network of distributors, and an online shopping catalog. The company was founded in 1987 and is headquartered in Stamford, Connecticut.

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.

TriMas Corporation engages in the design, development, manufacture, and sale of products for consumer products, aerospace, and industrial markets worldwide. The company operates through Packaging, Aerospace, and Specialty Products segments. The Packaging segment offers dispensing products, such as foaming and sanitizer pumps, lotion and hand soap pumps, beverage dispensers, perfume sprayers, and nasal and trigger sprayers; polymeric and steel caps and closures comprising food lids, flip-top and beverage closures, child resistance caps, drum and pail closures, and flexible spouts; polymeric jar products; integrated dispensers; bag-in-box products; and consumable vascular delivery and diagnostic test components under the Rieke, Taplast, Affaba & Ferrari, Intertech, Omega, and Rapak brands. The Aerospace segment provides fasteners, collars, blind bolts, rivets, ducting, and connectors for air management systems, and other highly-machined parts and components to original equipment manufacturers, supply chain distributors, and tier one suppliers, as well as maintenance, repair and overhaul (MRO)/aftermarket providers; and military and defense aerospace applications and platforms under the Monogram Aerospace Fasteners, Allfast Fastening Systems, Mac Fasteners, TFI Aerospace, RSA Engineered Products, and Martinic Engineering brands. The Specialty Products segment offers steel cylinders for use in the transportation, storage, and dispensing of compressed gases under the Norris Cylinder brand; natural gas powered wellhead engines, compressors, and replacement parts for oil and natural gas production, and other industrial and commercial markets under the Arrow brand; and spare parts for various industrial engines. It sells its products through a direct sales force, third-party agents, and distributors. TriMas Corporation was incorporated in 1986 and is headquartered in Bloomfield Hills, Michigan.

Tredegar Corporation manufactures and sells aluminum extrusions, polyethylene (PE) films, and plastic and polyester films in the United States and internationally. It operates through three segments: Aluminum Extrusions, PE Films, and Flexible Packaging Films. The Aluminum Extrusions segment produces soft and medium strength alloyed aluminum extrusions, custom fabricated and finished aluminum extrusions for the building and construction, automotive and transportation, consumer durables, machinery and equipment, electrical and renewable energy, and distribution markets; and manufactures mill, anodized, and painted and alloyed aluminum extrusions to fabricators and distributors. The PE Films segment offers single- and multi-layer surface protection films for protecting components of flat panel and flexible displays that are used in televisions, monitors, notebooks, smart phones, tablets, e-readers, and digital signage under the UltraMask, ForceField, ForceField PEARL, Pearl A, and Obsidian brands. This segment provides polyethylene overwrap for bathroom tissue and paper towels, as well as polyethylene overwrap films and films for other markets. The Flexible Packaging Films segment offers polyester-based films for food packaging and industrial applications under the Ecophane and Sealphane brands. Tredegar Corporation was incorporated in 1988 and is headquartered in Richmond, Virginia.