Sunbelt Rentals, a wholly-owned subsidiary of Ashtead Group plc, is one of the largest equipment rental companies in the U.S. Based in Fort Mill, S.C., we serve the needs of a wide variety of customers - from commercial, residential, municipal and specialized service industries to weekend do-it-yourselfers. Coach Profit Center Managers in maximizing profits with best possible fleet mix, pricing strategies, service/preventive maintenance programs, utilization, delivery and.