| Staatsschauspiel (Ballhof) | Staatsschauspiel (Ballhof) | | | |
| Shakespeare’s Globe | Shakespeare’s Globe | | | |
| Shanghai International Studies University | Shanghai International Studies University | 2010 | 1 | |
| Singapore Arts Festival | Singapore Arts Festival | 2007 | 1 | |
| Sommerteateret | Sommerteateret | 2006 | 1 | |
| Speilbilder Teater | Speilbilder Teater | 2011 | 1 | |
| Sedos | Sedos | 2025 | 1 | |
| Stone & Wings | Stone & Wings | 2006 | 1 | |
| Shunjuza | Shunjuza | 1922 | 1 | |
| Siena College | Siena College | 2023 | 1 | |
| STAGE-M (Society for Theatre Arts Growth & Enjoyment in Mid-Michigan) | STAGE-M (Society for Theatre Arts Growth & Enjoyment in Mid-Michigan) | 2025 | 1 | |
| Storsjöyran-festivalen | Storsjöyran-festivalen | 2000 | 1 | |
| Shingekisha | Shingekisha | 1914 | 1 | |
| Scriblers Dramatic Society, The | The Scriblers Dramatic Society | 1885 | 1 | |
| Sladký časy | Sladký časy (Sweet times) | 2023 | 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 | |
| Seoul Metropolitan Theater | The Seoul Metropolitan Theater | 2024 | 1 | |
| Secret House | Secret House | 2024 | 1 | |
| Städtische Bühnen Hannover | Städtische Bühnen Hannover | 1949 | 1 | |
| Saint Sebastian Players | Saint Sebastian Players | 2024 | 1 | |
| São João National Theater | São João National Theater | 2021 | 1 | |
| SM Arte e Cultura | SM Arte e Cultura | 2024 | 1 | |
| SISU Finalmente | SISU Finalmente | 2010 | 1 | |
| Svend og Ellen Aggerholm Tourneen (Eyvind Kornbeck-Tourneen) | Svend og Ellen Aggerholm Tourneen (Eyvind Kornbeck-Tourneen) | 1915 – 1921 | 1 | |
| Snow College Performing Arts | Snow College Performing Arts | 2025 | 1 | |
| Staats-Oper Berlin | Staats-Oper Berlin | 1938 | 1 | |
| Sceneriet | Sceneriet | 2007 | 1 | |
| Schauspielensemble Anklam | Schauspielensemble Anklam | 1969 | 1 | |
| Sixth Festival | The Sixth Festival | 2024 | 1 | |
| Spring Willow Society | Spring Willow Society | 1914 | 1 | |
| Städtische Bühnen Köln | Städtische Bühnen Köln | 1931 – 1932 | 1 | |
| Swan Theatre Company | Swan Theatre Company | 2003 | 1 | |
| Stage West Theatre Company | Stage West Theatre Company | 1996 | 1 | |
| South High School | South High School | 1923 | 1 | |
| Santa Cristina Centro Theatrical | Santa Cristina Centro Theatrical | 2011 | 1 | |
| Solarium Asbl | Solarium Asbl | 2022 | 1 | |
| Sunset Players of Sharon | Sunset Players of Sharon | 2003 | 1 | |
| Stordfest | Stordfest | 2007 | 1 | |
| Stephens College | Stephens College | 1974 | 1 | |
| Slovene National Theatre Nova Gorica | Slovene National Theatre Nova Gorica | 2024 | 1 | |
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