DMI Companies
Founded in 1978 by Peter J. Arnoldt as Ductmate Industries, DMI Companies, Inc. is now comprised of four strategic business units: Ductmate Industries, Aire Technologies, GreenSeam Industries, and Linx Industries. In 2005, the company restructured and created DMI Companies as the parent company of Ductmate and Aire Technologies. In 2015, GreenSeam pipe and fittings products branched off as a new division of DMI Companies called GreenSeam Industries (GSI), and Lindab USA was bought and renamed Linx Industries.