Lorimar
Lorimar was a TV production house, founded in 1968 by producer Lee Rich. Its first big hit was The Waltons in 1972, but it's probably better remembered now for producing Dallas and its sister show Knots Landing. Lorimar also produced the occasional Made for TV Movie, and after buying Allied Artists Pictures (a B-Movie company who had produced, among other things, Mitchell) in 1980 they also dabbled in theatrical releases.
Lorimar merged with television syndicator Telepictures in 1986. The combined Lorimar-Telepictures then bought the Metro Goldwyn Mayer lot from Ted Turner. The new Lorimar transitioned from dramas to Sitcoms after the merger, with shows like Full House becoming the bulk of their output. Finally, in 1988, Warner Bros bought L-T, eventually combining Lorimar itself with Warner Bros. Television and keeping Telepictures on as a Talk Show production division. As for the MGM lot, Warners sold that to Sony, since Columbia Pictures had been without a studio lot since 1972 and had been renting half of the Warner lot for all those years.