ABC Supply officially added its 12th store in Pennsylvania today with its announcement that it acquired the assets of Alliance Wholesale Supply, an 18-year-old roofing dealer with a single location in Johnstown, Pa.

Current employees will stay at the location, which will be one of just a few ABC Supply yards in central Pennsylvania and the only one within a 50-mile radius of Johnstown.

ABC Supply has been an active M&A player lately. In June, it acquired G & F Roof Supply, a roofing products dealer with stores in Anaheim, Whittier, and Gardena, Calif. And on March 21, it announced the acquisition of Robosson Supply, a siding, windows, and gutter dealer based in Sykesville, Md.

ABC Supply is the biggest company on the ProSales 100, having posted sales of $9.33 billion in 2017, 99% of it to pros.