| Societa per Attori e Parol&Musica, La | La Societa per Attori e Parol&Musica | 2002 – 2005 | 16 | |
| 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 | |
| Städtische Theater Leipzig | Städtische Theater Leipzig | 1913 – 1928 | 40 | |
| Sixth Festival | The Sixth Festival | 2024 | 1 | |
| State Opera of Tatarstan, The | The State Opera of Tatarstan (Musa Džalil Tatar theatre of opera and ballet) | 2003 – 2005 | 2 | |
| Shanghai International Studies University | Shanghai International Studies University | 2010 | 1 | |
| Suomen Kansallisteatteri | Suomen Kansallisteatteri | 1891 – 2005 | 13 | |
| Städtische Bühnen Frankfurt am Main | Städtische Bühnen Frankfurt am Main | 1937 | 2 | |
| Singapore Arts Festival | Singapore Arts Festival | 2007 | 1 | |
| Sommerteateret | Sommerteateret | 2006 | 1 | |
| Schleswig-Holsteinisches Landestheater und Sinfonieorchester | Schleswig-Holsteinisches Landestheater und Sinfonieorchester | 1976 – 2002 | 12 | |
| Slovene National Theatre Nova Gorica | Slovene National Theatre Nova Gorica | 2024 | 1 | |
| Shunjuza | Shunjuza | 1922 | 1 | |
| Speilbilder Teater | Speilbilder Teater | 2011 | 1 | |
| Shanghai Amateur Actors Association | Shanghai Amateur Actors Association | 1934 – 1935 | 2 | |
| Stadttheater Basel | Stadttheater Basel | 1928 – 1930 | 2 | |
| Stone & Wings | Stone & Wings | 2006 | 1 | |
| StøpeSkien | StøpeSkien | 2003 – 2007 | 62 | |
| Scribblers Hongkong | Scribblers Hongkong | 2006 | 1 | |
| Shingekisha | Shingekisha | 1914 | 1 | |
| Scriblers Dramatic Society, The | The Scriblers Dramatic Society | 1885 | 1 | |
| Scharoun-Theater Wolfsburg | Scharoun-Theater Wolfsburg | 2023 | 6 | |
| Shared Experience | Shared Experience | 2000 | 8 | |
| Staats-Theater Berlin | Staats-Theater Berlin | 1919 – 1930 | 19 | |
| Städtische Bühnen Freiburg | Städtische Bühnen Freiburg | 1966 | 2 | |
| Storsjöyran-festivalen | Storsjöyran-festivalen | 2000 | 1 | |
| Staatsschauspiel (Ballhof) | Staatsschauspiel (Ballhof) | | | |
| Sound & Light Egypt | Sound & Light Egypt | 2006 | 1 | |
| Spolek divadelních ochotníků Tyl | Spolek divadelních ochotníků Tyl | 1911 | 1 | |
| Stockholms Kulturfestival | Stockholms Kulturfestival | 2008 – 2011 | 2 | |
| Scarlet Cup | Scarlet Cup Theatre | 2023 | 1 | |
| Stolitschna balgarska dramatitscheska trupa «Salsa i smjah» | Stolitschna balgarska dramatitscheska trupa «Salsa i smjah» | 1898 | 2 | |
| Sächsische Staatstheater | Sächsische Staatstheater | 1942 | 2 | |
| Stavanger Teaters Orkester | Stavanger Teaters Orkester | 1946 | 1 | |
| SWAN - South West Actors Network | SWAN - South West Actors Network | 2007 | 1 | |
| Stage Society | Stage Society | 1900 – 1903 | 5 | |
| Southern Tier Actors Read | Southern Tier Actors Read | 2024 | 1 | |
| Sociedad Constructura de Pianos | Sociedad Constructura de Pianos | 1907 | 1 | |
| Süddeutsche Hoftheater-Ensemble | Süddeutsches Hoftheater-Ensemble (Süddeutsche Hoftheater-Ensemble) | 1887 | 3 | |
| Sudbury Dramatic Society | Sudbury Dramatic Society | 2007 – 2019 | 2 | |
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