| Amatørteatret | Amatørteatret | | | |
| Acting Company Mito Theatre | Acting Company Mito Theatre | 1993 | 1 | |
| Akademischer Verein für Kunst und Litteratur | Akademischer Verein für Kunst und Literatur (Akademischer Verein für Kunst und Litteratur) | 1902 | 1 | |
| Arendals Dramatiske Selskab | Arendals Dramatiske Selskab | 2011 | 1 | |
| Allan Holubar | Allan Holubar | 1915 | 1 | |
| Akademischer Studentenverein | Akademischer Studentenverein | 1896 | 1 | |
| Artestudio | Artestudio | 2006 | 1 | |
| Arts Victoria | Arts Victoria | 1998 | 1 | |
| Actors from Christiania Theater | Actors from Christiania Theater | 1867 | 1 | |
| Ariels, The | The Ariels | 2010 | 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 | |
| Arendalsuka | Arendalsuka | 2013 | 1 | |
| Agnes Sorma und die Irving Place Theatergesellschaft, N.Y. | Agnes Sorma und die Irving Place Theatergesellschaft, N.Y. | 1898 | 1 | |
| Askø Artist | Askø Artist | 2010 | 1 | |
| AGADU | AGADU | 1999 | 1 | |
| Assitej World Congres | Assitej World Congres | 1999 | 1 | |
| Association Franco-Norvégienne | Association Franco-Norvégienne | 1929 | 1 | |
| Adelaide Festival of Arts | Adelaide Festival of Arts | 2006 | 1 | |
| Azad Teater | Azad Teater | 1992 | 1 | |
| Albert Ranfts dramatiska turné | Albert Ranfts dramatiska turné | 1919 | 1 | |
| Arendal Ballett Center | Arendal Ballett Center | 2010 | 1 | |
| Asian Contemporary Arts Festival | Asian Contemporary Arts Festival | 2006 | 1 | |
| Agnes Straub | Agnes Straub | 1935 | 1 | |
| Abilene Christian University Department of Theatre | Abilene Christian University Department of Theatre | 2002 | 1 | |
| Atenea | Atenea | 1919 | 1 | |
| Athens Festival | Athens Festival | 2006 – 2010 | 2 | |
| Associate Players | Associate Players | 1922 | 2 | |
| Alfredo B. Crevenna | Alfredo B. Crevenna | 1954 | 2 | |
| Aesthetic Realism Theatre Company, The | The Aesthetic Realism Theatre Company | 2001 | 2 | |
| Afternoon Theatre, The | The Afternoon Theatre | 1909 | 2 | |
| Alexander Moissi | Alexander Moissi | 1933 | 2 | |
| August-Kurz-Ensemble, Das | Das August-Kurz-Ensemble | 1896 | 2 | |
| Arósio, Garcia & Rangel Produtores e Associados | Arósio, Garcia & Rangel Produtores e Associados | 2001 | 2 | |
| American Academy of Dramatic Arts | American Academy of Dramatic Arts | 1907 | 2 | |
| Actors Company, The | The Actors Company | 1996 – 2003 | 3 | |
| Assitej-festivalen | Assitej-festivalen | 1992 – 1993 | 3 | |
| Abbey Theatre | Abbey Theatre | 2005 – 2011 | 3 | 1 |
| Australian Elizabethan Theatre Trust, The | The Australian Elizabethan Theatre Trust | 1970 | 3 | |
| Adelaide Repertory Theatre Incorporated | Adelaide Repertory Theatre Incorporated | 1917 – 1964 | 3 | |
| Akosha | Akosha | 1976 | 3 | |
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