| Svenska Riksteatern - Orebroensemblen | Svenska Riksteatern - Orebroensemblen | 1969 | 2 | |
| South Asia Theatre Festival | South Asia Theatre Festival | 2006 | 2 | |
| Sue Lefton Productions | Sue Lefton Productions | 1994 | 1 | |
| Studentteateret Immaturus | Studentteateret Immaturus | 2006 | 1 | |
| Sixth Annual Play Festival | Sixth Annual Play Festival | 1937 | 1 | |
| Saiko Geijutsuza | Saiko Geijutsuza | 1924 | 1 | |
| Soffia Guðlaugsdóttir | Soffia Guðlaugsdóttir | 1932 | 1 | |
| Stadttheater Landsberg (Warthe) | Stadttheater Landsberg (Warthe) | 1928 | 1 | |
| Studentteatret | Studentteatret | 2000 | 1 | |
| Studio of Theatre Arts, The | The Studio of Theatre Arts | 1935 | 1 | |
| St. Olaf College Speech and Drama Department | St. Olaf College Speech and Drama Department | 1951 | 1 | |
| Stagecraft Theatre | Stagecraft Theatre | 2011 | 1 | |
| Spoleto Festival | Spoleto Festival | 2005 | 1 | |
| Small World Big Sky Productions | Small World Big Sky Productions | 2005 | 1 | |
| Siegener Biennale | Siegener Biennale | 2012 | 1 | |
| Sundrive Players, The | The Sundrive Players | 1965 | 1 | |
| Shakespeare Playhouse of New York, The | The Shakespeare Playhouse of New York | 1921 | 1 | |
| Stamsund Internasjonale Teaterfestival | Stamsund Internasjonale Teaterfestival | 2012 | 1 | |
| Skuespillerlinjen | Skuespillerlinjen | 1992 | 1 | |
| Städtische Bühnen Düsseldorf | Städtische Bühnen Düsseldorf | 1946 | 1 | |
| Skien International Ibsen Conference 2009 | Skien International Ibsen Conference 2009 | 2009 | 1 | |
| Sydney Opera House Trust | Sydney Opera House Trust | 1976 | 1 | |
| Scotland's National Young People's Theatre Festival | Scotland's National Young People's Theatre Festival | 2010 | 1 | |
| Singapore Arts Festival | Singapore Arts Festival | 2007 | 1 | |
| Sommerteateret | Sommerteateret | 2006 | 1 | |
| Shanghai International Studies University | Shanghai International Studies University | 2010 | 1 | |
| Stone & Wings | Stone & Wings | 2006 | 1 | |
| Shunjuza | Shunjuza | 1922 | 1 | |
| Speilbilder Teater | Speilbilder Teater | 2011 | 1 | |
| Storsjöyran-festivalen | Storsjöyran-festivalen | 2000 | 1 | |
| Shingekisha | Shingekisha | 1914 | 1 | |
| Scriblers Dramatic Society, The | The Scriblers Dramatic Society | 1885 | 1 | |
| Stavanger Teaters Orkester | Stavanger Teaters Orkester | 1946 | 1 | |
| SWAN - South West Actors Network | SWAN - South West Actors Network | 2007 | 1 | |
| Spolek divadelních ochotníků Tyl | Spolek divadelních ochotníků Tyl | 1911 | 1 | |
| Städtische Bühnen Hannover | Städtische Bühnen Hannover | 1949 | 1 | |
| Svend og Ellen Aggerholm Tourneen (Eyvind Kornbeck-Tourneen) | Svend og Ellen Aggerholm Tourneen (Eyvind Kornbeck-Tourneen) | 1915 – 1921 | 1 | |
| Staats-Oper Berlin | Staats-Oper Berlin | 1938 | 1 | |
| Sceneriet | Sceneriet | 2007 | 1 | |
| Schauspielensemble Anklam | Schauspielensemble Anklam | 1969 | 1 | |
| SISU Finalmente | SISU Finalmente | 2010 | 1 | |
| Spring Willow Society | Spring Willow Society | 1914 | 1 | |
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