| Statens teaterhøgskole | Statens teaterhøgskole | 1994 – 2003 | 9 | 3 |
| Scuola di Musica Il Flauto Magico | Scuola di Musica Il Flauto Magico | 2024 | 4 | 2 |
| Stabile Mobile | Stabile Mobile | 2014 | 2 | 2 |
| Saarländischer Rundfunk | Saarländischer Rundfunk | 1974 | 2 | 1 |
| Studio Formula Nuovo Balletto | Studio Formula Nuovo Balletto | 1975 | 1 | 1 |
| Sue Lefton Productions | Sue Lefton Productions | 1994 | 1 | |
| Studentteateret Immaturus | Studentteateret Immaturus | 2006 | 1 | |
| SlowMachine | SlowMachine | 2024 | 1 | |
| Sixth Annual Play Festival | Sixth Annual Play Festival | 1937 | 1 | |
| Saiko Geijutsuza | Saiko Geijutsuza | 1924 | 1 | |
| Soffia Guðlaugsdóttir | Soffia Guðlaugsdóttir | 1932 | 1 | |
| Skandinaviska Gästspelsturneen, Den | Den Skandinaviska Gästspelsturneen | 1890 | 2 | |
| Sächsische Staatstheater Dresden | Sächsische Staatstheater Dresden | 1920 – 1921 | 4 | |
| SMU-Meadows School of the Arts. Division of Theatre | SMU-Meadows School of the Arts. Division of Theatre | 2003 – 2005 | 2 | |
| Studentteatret | Studentteatret | 2000 | 1 | |
| Seoul Metropolitan Theater | The Seoul Metropolitan Theater | 2024 | 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 | |
| Students of Theater 259 Production Class | Students of Theater 259 Production Class | 2023 | 1 | |
| Spoleto Festival | Spoleto Festival | 2005 | 1 | |
| Stadttheater Landsberg (Warthe) | Stadttheater Landsberg (Warthe) | 1928 | 1 | |
| Sydney Theatre Company | Sydney Theatre Company | 1984 – 2006 | 6 | |
| Saint Sebastian Players | Saint Sebastian Players | 2024 | 1 | |
| Small World Big Sky Productions | Small World Big Sky Productions | 2005 | 1 | |
| Stadttheater Salzburg | Stadttheater Salzburg | 1911 | 3 | |
| Secret House | Secret House | 2024 | 1 | |
| Siegener Biennale | Siegener Biennale | 2012 | 1 | |
| Siena College | Siena College | | 1 | |
| Samina Peerzadas Ensemble | Samina Peerzadas Ensemble | 1992 – 1994 | 2 | |
| Städtische Schauspiele Baden-Baden | Städtische Schauspiele Baden-Baden | 1919 | 13 | |
| Sundrive Players, The | The Sundrive Players | 1965 | 1 | |
| Studentersamfundets Interne Teater | Studentersamfundets Interne Teater | 1994 – 2006 | 2 | |
| Shakespeare Playhouse of New York, The | The Shakespeare Playhouse of New York | 1921 | 1 | |
| Stamsund Internasjonale Teaterfestival | Stamsund Internasjonale Teaterfestival | 2012 | 1 | |
| SM Arte e Cultura | SM Arte e Cultura | 2024 | 1 | |
| Skuespillerlinjen | Skuespillerlinjen | 1992 | 1 | |
| Sladký časy | Sladký časy (Sweet times) | 2023 | 1 | |
| Svenska Inhemska Teatern | Svenska Inhemska Teatern | 1897 | 5 | |
| Städtische Bühnen Düsseldorf | Städtische Bühnen Düsseldorf | 1946 | 1 | |
| Schauspiel Bonn | Schauspiel Bonn | 1987 – 2006 | 11 | |
| Skien International Ibsen Conference 2009 | Skien International Ibsen Conference 2009 | 2009 | 1 | |
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