A. M. Castle & Co. is a global distributor of specialty metal and plastic products and supply chain services, principally serving the producer durable equipment, oil and gas, commercial aircraft, heavy equipment, industrial goods, construction equipment, retail, marine and automotive sectors of the global economy.

MRC Global is a leading global distributor of pipe, valve and fitting (PVF), products and services to the energy and industrial markets.

Alro Steel is a metals service center that distributes metals, industrial supplies and plastics. It sells a broad inventory of products under the following companies: Alro Steel, Alro Metals Service Center, Alro Metals Plus, Alro Industrial Supplies, and Alro Plastics. Alro has over 60 locations in 12 states.

Founded in 1954, Olympic Steel is a leading U.S. metals service center focused on the direct sale and distribution of large volumes of processed carbon, coated and stainless flat-rolled sheet, coil and plate steel and aluminum products. Headquartered in Cleveland, Ohio, Olympic Steel operates from 34 facilities in North America.

O'Neal Industries

Headquartered in Hong Kong, China Precision Steel is a niche precision steel processing company principally engaged in the production and sale of high precision cold-rolled steel products and provides value added services such as heat treatment and cutting medium and high carbon hot-rolled steel strips.

O'Neal Steel

Edgen Group is a leading global distributor of specialized products and services to the energy sector and industrial infrastructure markets, including steel pipe, valves, quenched and tempered and high yield heavy plate, and related components. Edgen Group is headquartered in Baton Rouge, La., with over 35 locations in 18 countries around the world.

EMG is a metals service center headquartered in Lynwood, Calif. In 2006, Reliance Steel & Aluminum Co. completed the acquisition of Earle M. Jorgensen Co. and EMJ became a wholly owned subsidiary of Reliance

Reliance Steel & Aluminum Co., headquartered in Los Angeles, Calif., is the largest metals service center company in North America.

Russel Metals is one of the largest metals distribution companies in North America. It carries on business in three metals distribution segments: metals service centers, energy products and steel distributors, under various names.

Ryerson Inc., a Platinum Equity company, is a leading North American processor and distributor of metals, with operations in the U.S., Mexico, Canada, China and Brazil. The company distributes and processes various kinds of metals, including stainless and carbon steel and aluminum products.

Samuel, Son & Co. is a family owned business founded in 1855 and is the 4th largest metal processor and distributor in North America. Samuel is also a major manufacturer of metal and related products. Samuel offers a full range of value added processing services and a complete range of carbon, stainless and aluminum products in all shapes and forms.

Gibraltar Industries is a manufacturer and distributor of products for building markets.

Skyline Steel LLC is a steel distributor serving the U.S., Canada, Mexico and the Caribbean. It was acquired by Nucor in 2012.

Heidtman Steel is an Ohio-based metals processor and distributor operating facilities within Indiana, Illinois, Michigan, Maryland and Ohio.

Jemison Demsey Metals specializes in supply chain solutions for flat rolled steel products. With headquarters in Birmingham, Ala., and processing and distribution centers in Ohio, South Carolina, Virginia and Alabama, Jemison Demsey Metals services the Eastern half of the U.S. with sheeting, blanking, slitting and other fabrication and proprietary software solutions.

Steel Technologies, headquartered in Louisville, Ky., is a flatrolled steel processor in North America. It is owned as a 50:50 joint venture between Nucor Corp. and Mitsui & Co. (U.S.A.).

Klöckner & Co is the largest producer-independent distributor of steel and metal products and one of the leading steel service center companies in the European and American markets combined.

Leeco Steel, headquartered in Lisle, Ill., maintains one of the nation’s largest inventories of carbon, HSLA and alloy plate steel coming from the premier mills worldwide. Founded in 1882, Leeco Steel has eight locations in North America and a one in Santiago, Chile. It is part of the O’Neal Industrial Metals Group.

In 2012, Namasco and Macsteel began operating under the Kloeckner Metals brand.

A leading wholesale distributor of tubular products for over 100 years, Marmon/Keystone inventories more than 15,000 sizes and grades of carbon, alloy, stainless and aluminum tubular and bar products. It is headquartered in Butler, Pa.

MISA is a fully integrated network of metal processing and manufacturing facilities and sales and service offices strategically located in the United States, Canada and Mexico.

Maverick was a leading North American producer of weldedOCTG, line pipe and coiled tubing for use in oil and natural gas wells. It was acquired by Tenaris in 2006.

Metal One is a Japan-based steel trading and distribution company.

Headquartered in Fort Lauderdale, Fla., Metals USA provides a wide range of products and services in the heavy carbon steel, flat-rolled steel, non-ferrous metals, and building products markets. It was acquired by Reliance Steel & Aluminum in 2013.