CIBC Theatre is a performing arts theater located at 18 West Monroe Street in the Loop area of downtown Chicago. It is operated by Broadway In Chicago, part of the Nederlander Organization. Opened in 1906 as the Majestic Theatre, it currently seats 1,800 and for many years has presented Broadway shows. In its early years, the theater presented vaudeville celebrity acts.

The Nederlander Organization, founded in 1912 by David T. Nederlander in Detroit, and currently based in New York City, is one of the largest operators of live theaters and music venues in the United States. Its first acquisition was a lease on the Detroit Opera House in 1912. The building was demolished in 1928. It later operated the Shubert Lafayette Theatre until its demolition in 1964 and the Riviera Theatre, both in Detroit. Since then, the organization has grown to include nine Broadway theaters, making it the second-largest owner of Broadway theaters after the Shubert Organization, and a number of theaters across the United States, including five large theaters in Chicago, plus three West End theatres in London.