Gordon Murray, the original conceiver, designer and engineer of the McLaren F1, was given development prototype XP3 at the conclusion of the F1 project as stipulated in his contract with McLaren Cars Limited. He still owns the car to this day, and it is completely standard apart from the fitment of some LM suspension componentry.
McLaren themselves are known to retain F1 Le Mans XP1LM, the 1995 Le Mans-winning F1 GTR #01R, F1 development prototype XP5 that set the car's 240.1Mph top speed as a previous world record, and F1 GTR Longtail #020R which won first of the LMGT1 Class and second overall in the 1997 24 Hours of Le Mans.
Yoshio Tsuzuki owns F1 Le Mans LM2, along with a GT Longtail and standard Road Car.
Ralph Lauren owns F1 Le Mans LM3, along with 2 standard Road Cars.
The Sultan of Brunei currently owns 8 F1s, the most in the world, including the other 3 F1 LMs (LM1, LM4 and LM5), and GTR #09R which is effectively a replica of the Le Mans-winning #01R which McLaren will never sell. As with most of his other cars, as far as common knowledge goes they are never driven and merely sit there collecting dust. #014 is the only F1 that has escaped the Brunei collection, and is now in America having been painted White, and upgraded with the GTR High-Downforce Kit and LM-style interior.
Don Wallace owns #073, painted Dark Tangerine Metallic one of only 2 F1 Road Cars to have been upgraded with the LM-Spec Engine and Extra High Downforce Kit, amongst other enhancements.
The other Road Car to have received the LM-Spec Engine and Extra High Downforce Kit is #018, painted a darker shade of Metallic Grey and currently owned by a gentleman in New Zealand.
Tony Smith in the UK owns #020, a black F1 Road Car also upgraded with the GTR High-Downforce Kit.
F1 GTR #013R was recently been acquired by an English gentleman named Andy, and was just seen over the weekend at the PistonHeads Sunday Service at BMW HQ.
Nick Mason's car is F1 GTR #010R.
F1 GTR #06R which came third overall in the 1995 24 Hours of Le Mans is currently in the hands of David Clark, former Sales Director of McLaren Cars Limited and the current owner of UK exotic and classic car specialist Taylor & Crawley.
Other past and present F1 owners include Ray Bellm and Thomas Bscher, both of whom were actually responsible for pushing through the F1 GTR racing programme when it first began in 1995. In fact Mr. Bscher loved his F1 so much that he famously used to drive it to work every day, averaging 200-Mph speeds on the Autobahn on a very regular basis.