Grainger is a distributor of maintenance, repair, and operating (MRO) products — the supplies and equipment (safety gear, tools, pumps, cleaning materials, etc.) that businesses consume to keep their facilities running. Grainger serves over 4.6 million customers globally, from small businesses to large corporations, governments, and healthcare organizations. Grainger operates through two segments. The High-Touch Solutions segment (~80% of revenue) serves mid-size and large businesses under the Grainger brand in the U.S., Canada, and Mexico, offering roughly 2 million in-stock products with next-day delivery through a network of distribution centers. This segment adds value through a dedicated sales force, on-site inventory management (KeepStock), and eProcurement integrations. Private label products account for about 19% of U.S. stocked product sales in this segment. The Endless Assortment segment (~20% of revenue) serves smaller businesses through e-commerce platforms: Zoro in the U.S. (~13 million SKUs) and MonotaRO in Japan (~29 million SKUs), both operating without the high-touch service layer. Grainger's core growth strategy focuses on taking 400–500 bps of annual volume share above the broader MRO market through sales force expansion, merchandising, marketing optimization, and value-added services. Grainger generates strong free cash flow, which it deploys through ongoing DC network investment, a dividend it has raised for 54 consecutive years, and share repurchases.