Wesco is a B2B distributor of electrical, networking, and utility products, operating over 700 locations across roughly 50 countries. Wesco serves construction contractors, industrial companies, utilities, OEMs, and data center operators, offering millions of products — from wire and cable to network cabling, switches, and transformers — alongside value-added services including supply chain management, kitting, project deployment, and logistics. Wesco operates three segments: Communications & Security Solutions (CSS, ~39% of revenue), which sells network infrastructure, IT infrastructure, and security systems, and houses Wesco's data center business; Electrical & Electronic Solutions (EES, ~37%), which sells electrical equipment, wire, automation, and MRO products to contractors and industrial customers; and Utility & Broadband Solutions (UBS, ~24%), which sells wire, cable, transformers, and grid equipment to electric utilities and broadband operators. Data centers have become Wesco's most important growth driver, with total data center sales reaching roughly $4.3B in FY25. Wesco covers the full data center lifecycle — from planning and construction through operations and decommissioning — across both gray space (power infrastructure) and white space (network and IT infrastructure). Wesco makes money by purchasing products from manufacturers and reselling them at a markup, with profitability driven by product mix, supplier volume rebates, and operating leverage on a largely fixed SG&A base. Wesco's growth strategy centers on three trends: AI-driven data center expansion, electrification, and supply chain reshoring.