The story
Atlas Tube was founded in 1984 by Harry Zekelman. A majority stake was sold to the Carlyle Group in 2006 for $1.5 billion CND.
In 2006–2008, the Carlyle Group purchased John Maneely Co (founded in 1877) for $550 million, then purchased Atlas Tube, and Sharon Tube (founded in 1929), forming them into JMC Steel Group under DBO Holdings. Carlyle and Zekelman nearly sold them to Novolipetsk Steel (NLMK) for $3.5 billion in 2008, but the deal fell through in late 2008, with DBO/Carlyle suing NLMK for breach of contract. DBO/Carlyle and NLMK settled their lawsuit in 2009, with NLMK paying $234 million.
Picoma became part of JMC in 2009. Carlyle sold a majority stake to the Zekelman family in 2011. The company name was changed to Zekelman Industries in 2016.
From Wikipedia’s article on Zekelman Industries, shared under CC BY-SA 4.0.6