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Gypsum Management and Supply (GMS), a multi-billion dollar drywall distributor that aims to go public, expanded again today with the announcement that it acquired Wall & Ceiling Supply of South Seattle, Wash.

As is common with GMS, the company will keep its name, and the firm's leadership team also will remain in place.

With the acquisition--its fourth this year--Tucker, Ga.-based GMS now counts 185 distribution centers across the U.S. It recorded $1.57 billion in revenues in its fiscal year ending April 30, 2015. The privately held company filed a registration statement with the SEC last July as a prelude to going public, but as yet it hasn't acted on those plans.