Willis Lease Finance Corporation is a leading provider of aircraft engine leasing and aviation services, primarily serving commercial airlines, aircraft engine manufacturers, and maintenance, repair, and overhaul organizations across more than 120 countries. The company specializes in leasing both large and regional spare commercial aircraft engines, auxiliary power units, and related aircraft equipment. Its business model integrates engine and aircraft trading, engine lease pools, and asset management services, supported by subsidiaries focused on maintenance, repair, parts management, and end-of-life solutions for aviation materials. Willis Lease Finance Corporation operates a substantial and diverse portfolio, with over $2.8 billion in book value, predominantly focused on modern narrowbody jet engines. This portfolio is complemented by vertically integrated services including engine maintenance, aircraft disassembly, aftermarket parts sales, and consulting, enabling clients to minimize downtime and optimize fleet operations. The firm's comprehensive service offerings, industry expertise, and global reach have established it as an independent pioneer in aircraft engine leasing, contributing to enhanced liquidity and flexibility in the aviation finance sector. Its consistent profitability and leadership in innovative leasing strategies make it a significant player in the business services and industrials segment, impacting airline fleet efficiency and maintenance economics worldwide.