After being acquired by the Big Six film studios, these companies gradually came under the control of the Big Six and lost the independence of an independent film company.
Representative of this is New Line Cinema, which was established in 1967 and initially made a name for itself by distributing low-budget horror films. In the '90s, it successfully released "Teenage Mutant Ninja Turtles" and became a top independent production company in Hollywood.
This caught the attention of Time Warner, and in '93, it was acquired by Warner. Later, it relied on the distribution and production of "The Lord of the Rings" series, which was a huge success.