Beacon Roofing Supply is the largest publicly traded specialty wholesale distributor of roofing and complementary exterior building products in North America, operating 586 branches across all 50 U.S. states and seven Canadian provinces. Beacon sells to roughly 110,000 professional customers — primarily roofing contractors, homebuilders, and commercial building owners — through a branch-based model where local sales teams build contractor relationships, supported by a digital ordering platform called Beacon PRO+. The core business is distributing roofing materials: asphalt shingles dominate residential, while single-ply membranes and insulation dominate commercial (low-slope) roofing. Beacon also distributes complementary exterior products including waterproofing, siding, and windows and doors, and has rapidly scaled a specialty waterproofing distribution business through acquisitions. Beacon makes money by buying materials from manufacturers in volume and reselling at a markup, with profitability driven by price/cost spread, product mix, and operating leverage on a relatively fixed branch cost base. Beacon also sells products under its private label TRI-BUILT brand, which carries meaningfully higher gross margins than branded alternatives. Growth is pursued through acquisitions, greenfield branch openings, and organic initiatives including digital adoption, private label penetration, and a commercial market share program. Residential roofing demand is largely non-discretionary and repair-driven, making it relatively resilient, though storm activity is a key volume swing factor.