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| Aalto-Musiktheater Essen | Germany | CompanyView profile |
| Aardklop Nasionale Kunstefees | Potchefstroom, South Africa | CompanyView profile |
| Aarhus Teater | Aarhus, Denmark | CompanyView profile |
| ABAO Bilbao Opera | Bilbao, Spain | CompanyView profile |
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| Academia Montis Regalis | Mondovi, Italy | CompanyView profile |
| Academic Choir and Academic Orchestra of the University of Stuttgart | Stuttgart, Germany | CompanyView profile |
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| Académie baroque européenne d'Ambronay | Ambronay, France | CompanyView profile |
| Acapela Studios | United Kingdom | CompanyView profile |
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| Accademia di Belle Arti di Carrara | Carrara, Italy | CompanyView profile |
| Accademia di Belle Arti di Venezia | Venice, Italy | CompanyView profile |
| Accademia di Montegral | Ponte a Moriano, Italy | CompanyView profile |
| Accademia Filarmonica di Verona | Italy | CompanyView profile |
| Accademia Filarmonica Romana | Rome, Italy | CompanyView profile |
| Accademia Lirica Internazionale Umberto Giordano | Foggia, Italy | CompanyView profile |
