| Name | Functions | Event Dates | Events | Resources  | ||
|---|---|---|---|---|---|---|
| Aku Ahjolinna | Choreographer | 1996 | 1 | |||
| Keiichiro Aida | Actor | 1996 - 1997 | 2 | |||
| Suzan Azimi | Actor | 1996 | 4 | |||
| Remo Airaldi | Actor | 1996 | 1 | |||
| E. Auer | Actor | 1995 | 1 | |||
| Ulrike Aberle | Actor | 1995 | 4 | |||
| Daniel Aigner | Actor | 1995 | 6 | |||
| Antonia Arnold | Actor | 1995 | 2 | |||
| Helmut Aunkofer | Actor | 1995 | 2 | |||
| Mr Atkinson | Actor | 1889 | 1 | |||
| Petra Anders | Actor | 1995 | 1 | |||
| Róbert Arnfinnsson | Actor | 1954 - 1996 | 2 | |||
| Hannes Abplanalp | Actor | 1995 | 3 | |||
| Elsbeth Affolter | Actor | 1995 | 3 | |||
| Vebi Aliji | Actor | 1995 | 1 | |||
| Bettina Amacher | Actor | 1995 | 5 | |||
| Linda Andersson | Actor | 1997 | 1 | |||
| Emma Andersson | Actor | 1997 | 1 | |||
| Eivind Aarset | Composer | 2015 | 1 | |||
| Mark Anduss | Sound Designer | 1995 - 2000 | 2 | |||
| Hideyuki Akabane | Actor | 1995 | 1 | |||
| Yuhmi Akino | Actor | 1995 | 1 | |||
| Roberto Abal | Actor | 1995 | 2 | |||
| Martin Angermann | Actor | 1995 | 5 | |||
| Dominique Arel | Designer | 1995 | 1 | |||
| Barry Atsma | Actor | 2006 - 2012 | 16 | |||
| Blair Anthony | Actor, Adaptation | 1995 - 2013 | 2 | |||
| Giatgen Augustin | Actor | 1995 | 2 | |||
| Remo Arpagaus | Actor | 1995 | 2 | |||
| Maurus Augustin | Designer | 1995 | 2 | |||
| Sylke Aehlig | Mask Maker | 2002 | 1 | |||
| Johannes Arpe | Actor | 2006 | 3 | |||
| Debbie Andres | Actor | 1969 | 1 | |||
| H. Annenkov | Actor | 1969 | 1 | |||
| John Atterbury | Actor | 2005 | 1 | |||
| Neil Austin | Lighting Designer | 2005 - 2009 | 4 | |||
| Greg Arata | Actor | 1998 | 2 | |||
| Wallace Acton | Actor | 1998 | 2 | |||
| Mats Antell | Lighting Designer | 2014 | 1 | |||
| Richard Aronovitch | Actor | 1998 | 1 | |||
| Yota Argyropoulou | Actor, Adaptation, Dramaturg | 2014 - 2018 | 8 | |||
| Ourania Argyropoulou | Musical Director | 2015 | 1 | |||