Planes may fly around the world, but they can't leave the ground without Wesco Aircraft Holdings. One of the largest logistics and supply chain companies serving the aerospace industry, it provides distribution, vendor relationship management, just-in-time (JIT) delivery, quality assurance, and kitting. Operating through Wesco Aircraft Hardware and other subsidiaries, the company stocks about 565,000 different pieces of hardware, bearings, tools, electronic components, and machined parts from more than 5,000 suppliers. Boeing, Airbus, and Bombardier are among its largest customers.