| Name | Functions | Event Dates | Events | Resources  | ||
|---|---|---|---|---|---|---|
| Tetsushi Ono | Actor | 2009 | 1 | |||
| Yu Okada | Sound Designer | 2009 | 1 | |||
| Akiko Oshima | Dramaturg | 2009 | 1 | |||
| Zuzu Oliel | Actor | 2009 | 1 | |||
| Katja Ott | Director | 2010 | 1 | |||
| Gustavo Obregon | Actor | 2009 | 9 | |||
| Andres Oja | Actor | 2001 - 2010 | 2 | |||
| Steve O'Connell | Actor | 2010 | 1 | |||
| Hacchaku Ono | Dramaturg | 2009 | 3 | |||
| Ellen Oseng | Costume Designer, Designer | 2009 | 2 | |||
| Girija Oak | Translator | 2009 | 1 | |||
| Hertta-Maija Ohinmaa | Actor | 2009 | 2 | |||
| Noreen O'Neill | Actor | 2011 | 1 | |||
| Keith O'Brien | Musical Director | 2016 - 2019 | 2 | |||
| Samo Oblokar | Lighting Designer | 2010 - 2012 | 3 | |||
| Naomi Omori | Actor | 2010 | 1 | |||
| Michael O’Neill | Director | 2010 | 1 | |||
| Sebastian Orillac | Actor | 2010 | 1 | |||
| Brad O’Brien | Actor | 2010 | 1 | |||
| Walther Orth | Actor | 1964 | 1 | |||
| Svante Odqvist | Actor | 1964 | 1 | |||
| Nina O'Keefe | Actor | 2011 | 1 | |||
| Nathan Osburn | Actor | 2011 | 2 | |||
| Nigel O’Hearn | Adaptation | 2011 - 2016 | 4 | |||
| Olga Odanović | Actor | 2011 | 1 | |||
| Geoffrey Omundi | Actor | 2011 | 1 | |||
| Beverley Ongota | Actor | 2011 | 1 | |||
| Klaus Opilik | Director | 2011 | 1 | |||
| Jessica Ohl | Actor | 2015 | 1 | |||
| Oscar Olivo | Actor | 2013 - 2022 | 2 | |||
| Alexandra Ostapenko | Actor | 2015 - 2022 | 2 | |||
| Fabian Oehl | Actor | 2012 | 2 | |||
| Vincent A. O'Reilly | Adaptation, Director | 2012 | 2 | |||
| Gabriel Ocina | Actor | 2012 | 1 | |||
| Anca Ovanez Doroşenco | Director | 1968 | 1 | |||
| David Oliver | Director | 2012 | 1 | |||
| Tilman Oestereich | Assistant Director | 2013 | 1 | |||
| Kingsley Odiaka | Actor | 2013 | 1 | |||
| Simeon Oakes | Actor | 2012 | 1 | |||
| Angela Obst | Dramaturg | 2012 - 2014 | 2 | |||
| Reinar Ortmann | Dramaturg | 2016 | 1 | |||
| Pat O'Sullivan | Lighting Designer | 1964 | 1 | |||