All the Dharma movies, Trimurti Films, movies was with Sony.
Chura Liya Hai Tumne rights was with Star Gold then it shifted to Zee
Zee mostly had the rights of all Goldmines Telefilms ,NH Studioz and Shemaroo movies but Zee had a fight with them because of not telecasting Dubbed movies (Goldmines) and giving less space (Shemaroo and NH Studioz) so most of their Library went to Sony and Star with Viacom getting some movies. Plus Venus Movies, Baba Arts original network was Zee but Star offered lucrative deal so all of them went to Star
All this because Zee didn't maintain relationships