ABC Supply, the nation's biggest pro-oriented dealer, acquired Robosson Supply, a siding, windows, and gutter dealer based in Sykesville, Md., ABC announced in a March 21 news release.

The acquisition gives ABC Supply its 15th location in Maryland. Current Robosson Supply associates will continue to work at the location.

ABC, based in Beloit, Wis., ranks first on the ProSales 100 with more than 700 locations nationwide.