ROSWELL, Ga.--(BUSINESS WIRE)--SiteOne Landscape Supply, Inc. (NYSE:SITE), the largest and only national wholesale distributor of landscape supplies in the United States, announced today the acquisition of American Builders Supply. Started in 1987, American Builders Supply has 10 locations in metro Los Angeles and 2 locations in Las Vegas. AB Supply is a leader in the distribution of hardscapes, natural stone and related products to landscape professionals. The acquisition of American Builders