A. M. Castle & Co., together with its subsidiaries, operates as a specialty metals and plastics distribution company in the United States, Canada, Mexico, France, the United Kingdom, Spain, China, and Singapore. It operates through two segments, Metals and Plastics. The Metals segment distributes engineered specialty grades and alloys of metals, as well as offers specialized processing services for Fortune 500 companies and medium and smaller sized firms. Its primary products include alloy, aluminum, nickel, stainless steel, carbon, and titanium in plate, sheet, extrusions, round bar, hexagon bar, square and flat bar, tubing, and coil forms. This segment also performs various specialized fabrications for its customers through pre-qualified subcontractors, which thermally process, turn, polish, and straighten alloy and carbon bars. It serves customers in the producer durable equipment, oil and gas, aerospace, heavy industrial equipment, industrial goods, and construction equipment sectors. The Plastics segment stocks and distributes various plastics in forms, such as plate, rod, tube, clear sheet, tape, gaskets, and fittings. This segment serves companies in the retail, automotive, marine, office furniture and fixtures, safety products, life sciences applications, and general manufacturing industries. A. M. Castle & Co. was founded in 1890 and is headquartered in Oak Brook, Illinois.