| Oestereich, Tilman | Tilman Oestereich | Assistant Director | 2013 | 1 | |
| Odiaka, Kingsley | Kingsley Odiaka | Actor | 2013 | 1 | |
| Otte, Carly | Carly Otte | Actor | 2013 | 1 | 1 |
| Ohlsson, Eva-Lotta | Eva-Lotta Ohlsson | Actor | 2013 | 1 | |
| Olmarker, Victoria | Victoria Olmarker | Actor | 2013 | 1 | |
| Oppermam, CJ | CJ Oppermam | Actor | 2013 | 1 | |
| Okamura, Akemi | Akemi Okamura | Dramaturg | 2013 | 1 | |
| Olsson, Mathias | Mathias Olsson | Actor | 2013 | 1 | |
| Ofir, Alon | Alon Ofir | Actor | 2013 | 1 | |
| Ott, Brian | Brian Ott | Actor | 2013 | 1 | |
| Oglesby, Ben | Ben Oglesby | Actor | 2013 | 1 | |
| Osborne, Collin | Collin Osborne | Actor | 2013 | 1 | |
| O'Byrne, Peter | Peter O'Byrne | Actor | 2013 | 1 | |
| O'Dea, Donncha | Donncha O'Dea | Actor | 2013 | 1 | |
| O'Donoghue, James | James O'Donoghue | Actor | 2013 | 1 | |
| Osbourne, Jessica | Jessica Osbourne | Director | 2013 | 1 | |
| Ojeda, Oscar | Oscar Ojeda | Actor | 2013 | 1 | |
| O'Sullivan IV, John | John O'Sullivan IV | Actor | 2013 | 1 | |
| Owen, Tony | Tony Owen | Designer | 2013 | 1 | |
| O'Neill, Daniel | Daniel O'Neill | Actor | 2013 | 1 | |
| Onodera, Shuji | Shuji Onodera | Director | 2013 | 1 | |
| Oščepkov, Artur | Artur Oščepkov | Choreographer | 2013 | 1 | |
| Omidi, Hossein | Hossein Omidi | Actor | 2013 | 1 | |
| Orii, Akitsu | Akitsu Orii | Musician | 2013 | 1 | |
| Odland, Bruce | Bruce Odland | Composer | 2013 | 1 | |
| Ošavkova, Sonja | Sonja Ošavkova (Соња Ошавкова) | Actor | 2013 | 1 | |
| Oakeshott, Owen | Owen Oakeshott | Actor | 2013 - 2014 | 11 | 1 |
| Omar, Hersh | Hersh Omar | Musician | 2013 - 2014 | 3 | |
| O'Mahony, Paul | Paul O'Mahony | Designer | 2013 - 2017 | 3 | |
| Olivo, Oscar | Oscar Olivo | Actor | 2013 - 2022 | 2 | |
| Otto, Bailey | Bailey Otto | Designer | 2014 | 1 | |
| Onwumere, Toby | Toby Onwumere | Actor | 2014 | 1 | |
| Okajima, Yuki | Yuki Okajima | Lighting Designer | 2014 | 1 | |
| Oswald, Cornelius | Cornelius Oswald | Designer | 2014 | 1 | 1 |
| Olsson, Marie | Marie Olsson | Costume Designer, Designer | 2014 | 2 | |
| Orawiec, Irena | Irena Orawiec | Actor | 2014 | 5 | |
| O'Connor, Hugh | Hugh O'Connor | Designer | 2014 | 1 | |
| Ortscheidt, Mathilde | Mathilde Ortscheidt | Actor | 2014 - 2015 | 2 | |
| Ott, Friederike | Friederike Ott | Actor | 2014 - 2016 | 12 | 1 |
| O’Brien, Peter | Peter O’Brien | Costume Designer | 2015 | 1 | |
| Orvik, Karianne | Karianne Orvik | Actor | 2015 | 1 | |
| Obenius, Frej | Frej Obenius | Sound Designer | 2015 | 1 | |
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