Willis Lease Finance Corporation leases large and regional spare commercial aircraft engines, auxiliary power units and aircraft to airlines, aircraft engine manufacturers and maintenance, repair and overhaul providers in 120 countries. These leasing activities are integrated with engine and aircraft trading, engine lease pools supported by cutting-edge technology, as well as technical and asset management, provided through its subsidiary Willis Asset Management Limited, and various end-of-life solutions for aircraft, engines and aviation materials provided through its subsidiary, Willis Aeronautical Services, Inc.