The JMC Steel Group was founded as the John Maneely Company (JMC) in 1877. It started as a distributor of pipe, values and fittings in Philadelphia, Pa. and grew into one of the largest independent steel pipe and tube distributors on the East Coast of the U.S.
The company began manufacturing pipe in 1931, and expanded into the conduit and fittings businesses by buying companies who produced those products in the 1960s and 70s.
In 2001, JMC acquired Laclede Steel Company and the assets of the Sawhill Tubular Division of AK Steel Corporation in 2002. In 2006, JMC was acquired by the Carlyle Group, a private global investment firm, headquartered in Washington, D.C.
Later in 2006, JMC bought Atlas Tube, the largest structural tubing manufacturer in North America, and in 2007 acquired Sharon Tube, a producer of standard pipe and DOM mechanical tubing.
The company was renamed the JMC Steel Group in October 2010. – less–ZoomInfo