Quad-C Management, a middle-market private equity firm, has acquired QED Technologies International Inc. from Entegris.

Entegris’ QED business is part of the company’s specialty chemicals and engineered materials (SCEM) division. The business offers MRF (magnetorheological finishing) polishing and SSI (subaperture stitching interferometry) metrology manufacturing services for optics manufacturers. QED’s services aim to drive production speed and yield and work to decrease costs.

“Quad-C and our industrial tech practice are thrilled to partner with QED and its strong management team in order to execute on our shared growth strategy,” says Tom Hickey, a Quad-C partner.

“QED has built a reputation for excellence in precision optics over nearly three decades. We are excited to partner with the company as it begins its next chapter as a standalone entity once again,” adds Matt Trotta, principal at Quad-C.