| Artestudio | Artestudio | 2006 | 1 | |
| Amanti del Teatro Neretino | Amanti del Teatro Neretino | 2024 | 1 | |
| Associazione Culturale Nati Domani | Associazione Culturale Nati Domani | 2021 | 1 | 1 |
| Actors from Christiania Theater | Actors from Christiania Theater | 1867 | 1 | |
| Arts Victoria | Arts Victoria | 1998 | 1 | |
| Ariels, The | The Ariels | 2010 | 1 | |
| Agrupament literari ‘Henrik Ibsen’ | Agrupament literari ‘Henrik Ibsen’ | 1904 | 1 | |
| Alireza Kooshk Jalali's Company | Alireza Kooshk Jalali's Company (Alireza Kooshk Jalali?s Company) | 2010 | 1 | |
| Artcraft Photoplay | Artcraft Photoplay | 1918 | 1 | |
| Amsterdamsch Lyrisch Tooneel | Amsterdamsch Lyrisch Tooneel | 1902 | 1 | |
| Amatørteatret | Amatørteatret | | | |
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