Owned by Paramount Global through Paramount Pictures (pre-October 1950 and post-March 1962 Paramount Cartoon Shorts) and NBCUniversal / Comcast through Universal Pictures (post-October 1950 to March 1962 Paramount Cartoon Shorts under Harvey Entertainment only).
Although it would be a long list, it would be nice to have a title reference for these! One item to notice, and this is true of all the cartoon studios that ran during this 20-30 years period is how the animation changed from outstanding/detailed/fluid to pure limited crap. People like to denigrate Famous Studios, but their overall work, especially the early years is extremely good.