Many theatre companies the Theatre Building Chicago as a space for one long-running play, but In 1988 TBC initiated "United Stages at Theatre Building" in response to several companies' requesting a seasonal home base rather than a spot for a single show.
Other notable companies that TBC hosted: Bailiwick Repertory Theatre, Chicago Theatre Project, Emerald City Theatre, Famous Door Theatre Company, Griffin Theatre Company, Porchlight Music Theatre, and Provision Theatre.