| Sala, Mario | Mario Sala | Actor | 2008 | 1 | |
| Scalera, Vanessa | Vanessa Scalera | Actor | 2012 | 2 | |
| Sifonia , Liberato Firmino | Liberato Firmino Sifonia | Composer | 1962 | 1 | |
| Spaziani, Serena | Serena Spaziani | Actor | 1962 | 1 | |
| Sora, Claudio | Claudio Sora | Actor | 1962 | 1 | |
| Silvani, Aldo | Aldo Silvani | Actor | 1956 | 1 | |
| Sanchez, Eduardo Romero | Eduardo Romero Sanchez | Lighting Designer, Sound Designer, Stage Manager | 2022 - 2025 | 33 | |
| Schlappig, Markus Sascha | Markus Sascha Schlappig | Assistant Director | 2019 | 1 | |
| Stuart, Mary | Mary Stuart | Actor | 1897 | 1 | |
| Salvo, Nicola | Nicola Salvo | Lighting Designer, Sound Designer | 2017 | 2 | |
| Strino, Luigi | Luigi Strino | Video Designer | 2017 | 1 | |
| Scott, Alice | Alice Scott | Actor | 1897 | 1 | |
| St. John, Rossie | Rossie St. John | Actor | 1897 | 1 | |
| St. John, Maisie | Maisie St. John | Actor | 1897 | 3 | |
| Stroppiana, Domenico | Domenico Stroppiana | Actor | 2018 | 1 | |
| Shakya, Nanaji | Nanaji Shakya | Actor | 2018 | 1 | |
| Sigillò, Ester | Ester Sigillò | Actor | 2015 | 2 | |
| Sacchetti, Maria Paola | Maria Paola Sacchetti | Actor, Director | 1997 - 2019 | 4 | |
| Scelsi, Lorenzo | Lorenzo Scelsi | Designer | 2019 | 1 | |
| Sechi, Naika | Naika Sechi | Assistant Director | 2022 - 2023 | 5 | |
| Sicuranza, Giuliana | Giuliana Sicuranza | Actor | 1997 | 1 | |
| Sieghi, Alessandro | Alessandro Sieghi | Actor | 1997 | 1 | |
| Sarti, Rosa | Rosa Sarti | Actor | 1999 | 1 | |
| Sabatini, Andrea | Andrea Sabatini | Actor | 2006 | 1 | |
| Shaikhudinova, Valeria | Valeria Shaikhudinova (Валерия Шайхудинова) | Actor | 2024 | 1 | |
| Stefanini, Alessandro | Alessandro Stefanini | Actor | 2018 | 1 | |
| Sigaev, Sergey | Sergey Sigaev (Сергей Сигаев) | Actor | 2024 | 1 | |
| Sarnelli, Costantino | Costantino Sarnelli | Director | 2013 | 4 | |
| Siniscalco, Giovanni Maria | Giovanni Maria Siniscalco | Actor, Director | 2021 - 2024 | 4 | |
| Scarpati Fanetti, Emilia | Emilia Scarpati Fanetti | Actor | 2014 | 3 | |
| Santoro, Federica | Federica Santoro | Actor, Adaptation, Director, Dramaturg | 2018 - 2019 | 24 | |
| Salvagnini, Dario | Dario Salvagnini | Lighting Designer | 2018 - 2019 | 6 | |
| Schindler, Marina | Marina Schindler | Designer | 2018 | 4 | |
| Suraci, Federica | Federica Suraci | Assistant Director | 2019 | 1 | |
| Scola, Stefania | Stefania Scola | Actor | 2019 | 1 | |
| Saponara, Antonello | Antonello Saponara | Actor | 2024 | 1 | |
| Scidà, Giovanbattista | Giovanbattista Scidà | Actor | 2024 | 1 | |
| Schirillo, Giuseppe | Giuseppe Schirillo | Actor, Adaptation, Director | 2024 | 3 | |
| Severo, Arturo | Arturo Severo | Actor | 2022 | 1 | |
| Scalise, Chiara | Chiara Scalise | Actor | 2016 | 1 | |
| Sangiovanni, Enrica | Enrica Sangiovanni | Actor, Adaptation, Director | 2013 - 2015 | 24 | |
| Sacchetti, Marco | Marco Sacchetti | Lighting Designer, Technician | 2019 | 2 | |
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