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L.B. Foster Company provides engineered and manufactured products and services for the building and infrastructure projects in the United States, Canada, the United Kingdom, and internationally. It operates through two segments: Rail, Technologies, and Services; and Infrastructure Solutions. The Rail, Technologies, and Services segment offers new rail to passenger and short line freight railroads, industrial companies, and rail contractors, as well as used rails; rail accessories, such as rack spikes, bolts, angle bars, tie plates, and other products; insulated rail joints and related accessories; fixation fasteners, coverboards, and special accessories; and trackwork products. This segment also provides engineered concrete railroad ties, friction management products and application systems, railroad condition monitoring systems and equipment including wheel impact load detection systems, wayside data collection and management systems, and rockfall, flood, earthworks, and bridge strike monitoring; and aftermarket services. The Infrastructure Solutions segment manufactures precast concrete products for use as restrooms, concession stands, and protective storage buildings under the CXT brand for national, state, and municipal parks; and manufactures sounds walls, bridge beams, box culverts, septic tanks, and other custom pre-stressed and precast concrete products. This segment also provides steel bridge products; corrosion protection solutions; concrete-reinforced steel grid decking, open steel grid deck, aluminum bridge railing, and stay-in-place steel bridge forms; cuts, threads, and paints pipe; threading services for water well applications; protective pipeline coating services; and turnkey solutions for metering and injection systems for oil and gas markets. L.B. Foster Company was founded in 1902 and is headquartered in Pittsburgh, Pennsylvania.

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.

Olympic Steel, Inc. processes, distributes, and stores metal products primarily in the United States, Canada, and Mexico. It operates in three segments: Carbon Flat Products; Specialty Metals Flat Products; and Tubular and Pipe Products. The company offers stainless steel and aluminum coil and sheet products, angles, rounds, and flat bars; alloy, heat treated, and abrasion resistant coils, sheets and plates; coated metals, including galvanized, galvannealed, electro galvanized, advanced high strength steels, aluminized, and automotive grades of steel; commercial quality, advanced high strength steel, drawing steel, and automotive grades cold rolled steel coil and sheet products; hot rolled carbon comprising hot rolled coil, pickled and oiled sheet and plate steel products, automotive grades, advanced high strength steels, and high strength low alloys; tube, pipe, and bar products, including round, square, and rectangular mechanical and structural tubing; hydraulic and stainless tubing; boiler tubing; carbon, stainless, and aluminum pipes; valves and fittings; and tin mill products, such as electrolytic tinplate, electrolytic chromium coated steel, and black plates. The company also provides cutting-to-length, slitting, shearing, blanking, tempering, stretcher-leveling, plate and laser processing, forming and machining, tube processing, finishing, and fabrication services, as well as value-added services, such as saw cutting, laser cutting, beveling, threading, and grooving services. It serves metal consuming industries, such as manufacturers and fabricators of transportation and material handling lift equipment, construction, mining and farm equipment, agriculture equipment, storage tanks, environmental and energy generation equipment, automobiles, food service, and electrical equipment, as well as general and plate fabricators, and metals service centers through direct sales force. Olympic Steel, Inc. was founded in 1954 and is based in Highland Hills, Ohio.

Zymergen Inc. design, develop, and commercialize microbes, molecules, and materials. It offers an automation solution comprising reconfigurable automation carts, a modular hardware building blocks that allow for assembly of work cells customized for the particular needs of a lab; and automation control software, a cloud-based software used to control integrated automation systems. It serves electronics, packaging, healthcare, agriculture, and other industries. Zymergen Inc. was incorporated in 2013 and is based in Emeryville, California. As of October 19, 2022, Zymergen Inc. operates as a subsidiary of Ginkgo Bioworks Holdings, Inc.