Wesco Aircraft Holdings Inc is a distributor of supply management services to the aerospace industry. The services include distribution, management of supplier relationships, quality assurance, kitting, just-in-time delivery, and point-of-use inventory management. The company serves commercial aerospace, energy, general aviation, pharmaceuticals, airlines, and maintenance and repair companies, and the defense sector. The majority of its revenue stream is based on long-term contracts. The largest customer by revenue can be categorized as original equipment manufacturers and contractors. Geographically, North America makes up the lion's share of Wesco Aircraft's generated sales.