At the end of July 2015, the top 50 aircraft lessors managed 8,184 aircraft: 511 turboprop regional airliners, 792 regional jets, 5,612 narrowbody and 1,253 widebody airliners.[1] In 2017, the 150 lessors are managing 8,400 aircraft worth $256 billion with 2,321 aircraft on backlog from 28 of them, their penetration having stabilised at 42.6%.[2] Aircraft lessors are often banks, hedge funds or financial institutions.