| Name | Functions | Event Dates  | Events | Resources | ||
|---|---|---|---|---|---|---|
| James Otis | Actor | 1991 | 1 | |||
| Doc O'Brien | Actor | 1991 | 6 | |||
| Stefano Onofri | Actor | 1991 | 1 | |||
| Louis O´Byrne | Designer | 1991 | 1 | |||
| Robert Ormsby | Actor | 1991 | 1 | |||
| Trevor H. Olsen | Actor | 1991 | 1 | 1 | ||
| Frank Obermann | Actor | 1991 | 1 | |||
| Shinobu Okazaki | Designer | 1991 | 1 | |||
| Kaoru Ohsawa | Lighting Designer | 1991 | 1 | |||
| Urs Obrecht | Actor | 1991 | 1 | |||
| Claudio Oldani | Director | 1991 | 1 | |||
| Floor Oskam | Designer | 1991 - 1992 | 14 | |||
| Adri Overbeeke | Actor | 1991 - 1992 | 84 | |||
| Kristin Olsoni | Assistant Director | 1991 - 2006 | 2 | |||
| Ulrike Obermüller | Costume Designer | 1991 - 2016 | 2 | |||
| Josef Ostendorf | Actor | 1991 - 2016 | 8 | |||
| Marceline Ouedraogo | Actor | 1992 | 1 | |||
| Zbigniew Olszewski | Actor | 1992 | 2 | |||
| Tine Oman | Actor | 1992 | 1 | |||
| Marc Olivere | Lighting Designer | 1992 | 1 | |||
| Gabriele Otto | Dramaturg | 1992 | 1 | |||
| Peter Oosthoek | Actor | 1992 | 1 | |||
| Ingo Ospelt | Actor | 1992 | 1 | |||
| Michael Olich | Costume Designer | 1992 | 1 | |||
| Lilita Ozoliņa | Actor | 1992 | 1 | |||
| Annie Otto | Actor | 1992 | 1 | |||
| Reiko Oimori | Actor | 1992 | 1 | |||
| Roos Ouwehand | Actor | 1992 | 1 | |||
| Sylvia Offermans | Actor | 1992 | 1 | |||
| Johannes Ohla | Mask Maker | 1992 | 1 | |||
| Tytti Oittinen | Director | 1992 - 1994 | 2 | 1 | ||
| Helga Op gen Orth | Actor, Adaptation, Director | 1992 - 1996 | 4 | |||
| Anna Ottmann | Actor | 1992 - 2000 | 3 | 1 | ||
| Gunilla Orvelius | Actor | 1992 - 2002 | 27 | 1 | ||
| Alexander Okun | Designer | 1992 - 2003 | 3 | 1 | ||
| Rigmor Ottesen | Actor | 1992 - 2007 | 32 | |||
| Per Ottesen | Actor | 1992 - 2013 | 36 | 1 | ||
| Bernarda Oman | Actor | 1992 - 2014 | 4 | |||
| Kikuyo Ohmori | Actor | 1993 | 1 | |||
| Claire Ormond | Actor | 1993 | 1 | |||
| Juliet Ouyoung | Costume Designer | 1993 | 1 | |||
| Geri O'Kelly | Choreographer | 1993 | 1 | |||