The first studio in Hollywood, the Nestor Company, was established by the New Jersey–based Centaur Company in a roadhouse at 6121 Sunset Boulevard (the corner of Gower), in October 1911. Four major film companies – Paramount, Warner Bros., RKO, and Columbia – had studios in Hollywood, as did several minor companies and rental studios. In the 1920s, Hollywood was the fifth-largest industry in the nation. By the 1930s, Hollywood studios became fully vertically integrated, as production, distribution and exhibition was controlled by these companies, enabling Hollywood to produce 600 films per year.