Kubrick was only ever documented as naming his ten favourite films on one occasion, which was published in Cinema magazine in 1963. The publication ceased operations in 1976, and not a single sci-fi made the cut. However, over the subsequent decades, various interviews and recollections from those closest to him have put together a stronger – if still incomplete – picture of the titles he enjoyed.
Source: https://faroutmagazine.co.uk/stanley-kubrick-favourite-sci-fi-movies/