Quantum Windows & Doors, a manufacturer of custom architectural fenestration products based in Everett, Wash., has been sold to a private equity group led by Swiftsure Capital.

As part of the acquisition, Jeff Klein has been appointed Quantum’s chief executive officer. Klein was previously senior vice president of Ply Gem Industries Inc., and president of several window companies owned by Ply Gem. Prior to his time with Ply Gem, Klein was senior vice president at Milgard Manufacturing, which was sold  to Masco Corporation in 2001.

The acquisition is not expected to affect Quantum’s day-to-day operations.

Investors affiliated with Swiftsure Capital were joined by Nitze-Stagen Capital Partners to fund the acquisition. Peter Nitze, president of Nitze-Stagen Capital Partners, will become a member of the Quantum board of directors. Gordon Gardiner, managing partner of Swiftsure Capital, Bill Lewis, chairman of Lease Crutcher Lewis, and Bill Douglass of Swiftsure will also join the Quantum board.

“Quantum is a national leader in custom wood window manufacturing,” Klein said. “They have set the standard for superb craftsmanship and are the go-to name for complex architectural projects that very few companies can execute. I look forward to building on the extraordinarily strong reputation that Quantum has in the industry.”

“There are a number of well-managed Northwest companies, like Quantum, that are seeking a change of ownership for generational transition issues or otherwise,” Gardiner said. “Swiftsure’s goal is to find those companies and help them realize their full growth potential. We’re happy to have led this deal for Quantum, and we look forward to seeing the company flourish.”


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