I've often been intrigued by the minutiae of aircraft ownership and leasing. Over the years, I've read several plaques in the passenger entrances with variations on, "this aircraft, with or without its engines, is owned by Blah Finance (Cayman Islands/Jersey/Antigua etc) is leased to GECAS/ILFC, is sub-leased to ABC Airways and is sub-sub-leased to XYZ Airlines, which is a trading style of Blah Aviation (Bermuda) Limited". I know, it's a purely fictional and extreme example!