| Theater am Horst-Wessel-Platz | Theater am Horst-Wessel-Platz | 1933 | 4 | |
| Tennent Productions Ltd. | Tennent Productions Ltd. | 1953 | 14 | |
| Theatre of Ireland | Theatre of Ireland | 1906 | 1 | |
| Theatro Circo | Theatro Circo | 2007 – 2008 | 6 | |
| Teatre d’Art | Teatre d’Art | 1922 | 1 | |
| Triad Stage | Triad Stage | 2009 – 2011 | 2 | |
| Tampere Internasjonale Teaterfestival | Tampere Internasjonale Teaterfestival | 1993 | 1 | |
| Therese Elfforss' Sällskap | Therese Elfforss' Sällskap | 1876 – 1879 | 9 | |
| Teatr «U Kamina» | Teatr «U Kamina» | 2012 | 2 | |
| Teatro Stabile del Friuli-Venezia Giulia | Teatro Stabile del Friuli-Venezia Giulia | 1968 – 2013 | 11 | |
| Thiasos Michaïl Arniotakis | Thiasos Michaïl Arniotakis | 1899 | 2 | |
| Théâtre du Vieux-Colombier | Théâtre du Vieux-Colombier | 1918 | 1 | |
| Teatr Mały | Teatr Mały | 1905 – 1913 | 2 | |
| Theater Tour Angela Reyer GmbH | Theater Tour Angela Reyer GmbH | 2002 – 2004 | 12 | |
| Teatralnyj Osobnâkʺ | Teatralnyj Osobnâkʺ | 2009 | 1 | |
| Tournée Harriet Bosse | Tournée Harriet Bosse | 1924 | 2 | |
| Thelma Holt | Thelma Holt | 1994 | 3 | |
| Teatre Bis | Teatre Bis | 1997 | 1 | |
| Teatro Massimo Bellini | Teatro Massimo Bellini | 2024 | 1 | |
| TAC Produções Artísticas | TAC Produções Artísticas | 1971 | 5 | |
| Teaterkompaniet Røde Rom | Teaterkompaniet Røde Rom | 2009 – 2010 | 3 | |
| Teatr Miejski | Teatr Miejski | 1911 | 1 | |
| Théâtre de Caen | Théâtre de Caen | 1994 – 2014 | 29 | |
| Torosha | Torosha | 1918 | 1 | |
| Theater Malpertuis | Theater Malpertuis | 1994 | 12 | |
| Teater Fusentast | Teater Fusentast | 1992 – 2020 | 46 | 1 |
| teaterverkstedet / teater x | teaterverkstedet / teater x | 1995 | 2 | 1 |
| Teatro Nacional D. Maria II | Teatro Nacional D. Maria II | 2007 – 2019 | 21 | 3 |
| Theater Pforzheim | Theater Pforzheim | 2004 | 4 | 4 |
| Teatrino Clandestino | Teatrino Clandestino | 1999 – 2002 | 75 | 5 |
| Theatergruppe der Kantonsschule Hottingen | Theatergruppe der Kantonsschule Hottingen | 2006 | 10 | 5 |
| Teatro San Martín | Teatro San Martín | 2001 | 6 | 6 |
| Teatret Vart | Teatret Vårt (Teatret Vart) | 1974 – 2019 | 552 | 8 |
| Teater Ibsen | Teater Ibsen | 1992 – 2023 | 3332 | 17 |
| Trøndelag Teater | Trøndelag Teater | 1938 – 2024 | 4514 | 74 |
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