Willis Lease Finance Corp. engages in the provision of commercial aircraft and aircraft engines services. It operates through the Leasing and Related Operations, and Spare Parts Sales segments. The Leasing and Related Operations segment leases aircraft engines and aircraft, and provide related services to a diversified group of commercial aircraft operators and maintenance, repair, and overhaul organizations. The Spare Parts Sales segment offers aircraft engine parts and materials through the acquisition or consignment of engines from third parties. The company was founded by Charles F. Willis, IV in 1985 and is headquartered in Coconut Creek, FL.