| Association de l'industrie électrique du Québec (AIEQ) | Montréal | Clean Technologies |
| Association des artistes peintres affiliés de la Rive | Saint-Bruno | Tout Arts et divertissement |
| Association des Chirurgiens Dentistes du Québec | Montréal | Cafes Terraces |
| Association des Modélistes Ferrovia... | Villeray | Tout Arts et divertissement |
| Association des scouts du Canada | Villeray | Tout Arts et divertissement, Tout Communautés et société |
| Association des Techniciens en Sant... | Lachine | Tout Entreprises et services |
| Association du transport urbain du Québec (ATUQ) | Montréal | Clean Technologies |
| Association pour la Promotion des D... | Montréal | Tout Arts et divertissement |
| Association professionnelle du pers... | Nouveau-Rosemont Et Mercier | Tout Communautés et société |
| Association Sociale Inca Canada | Montréal | Associations |
Publicité (Desktop) Publicité (Mobile) |
| ASSYSTEM PRODUCT ENGINEERING CANADA | Montréal | Aerospace |
| AST Clinical solutions | Laval | Life Sciences and Health Technologies (LSHT) |
| AST Clinical solutions | Albert-Einstein | Life Sciences and Health Technologies (LSHT) |
| ASTED | Quartier Latin Et Centre-Sud | Tout Enseignement et savoir |
| Astek Québec Inc | Montréal | Information Technologies (IT) |
| AstraZeneca Canada | Longueuil | Life Sciences and Health Technologies (LSHT) |
| Astria Technologies | Montréal | Car Repair |
| Asus | Montréal | Computer & Technology Assistance Programs |
| AT&T Canada | Centre-Ville | Tout Entreprises et services |
| Atara Equipment | Terrebonne | Assembly & Fabricating Services |
Publicité (Desktop) Publicité (Mobile) |
| ATD DESIGN SERVICES (4071468 CANADA INC.) | Sainte-Geneviève | Aerospace |
| Atek Canada | Montréal | Tout Informatique et internet |
| Atelier Bohica | Montréal | All-Terrain Vehicles |
| Atelier D'Arts Sophie Quenneville | Terrebonne | Art Schools |
| Atelier De Daria Centro Canada | Montréal | Furniture Stores |
| Atelier de dessin et de peinture Li... | Boucherville | Tout Arts et divertissement, Tout Enseignement et savoir |
| Atelier Mécanique D'Automobiles Multi-Tech Inc | Montréal | Car Repair |
| Atelier Nest Inc | Montréal | Architectural Technologists |
| Atelier Schwimmer | Montréal | Architectural Technologists |
| ATEM Canada Inc | Montréal | Information Technologies (IT) |
Publicité (Desktop) Publicité (Mobile) |
| Ates Médical Inc. | Saint-Bruno | Life Sciences and Health Technologies (LSHT) |
| AtGen Canada | Laval | Life Sciences and Health Technologies (LSHT) |
| Atis technologies | Montréal | Life Sciences and Health Technologies (LSHT) |
| Atlants Embedded | Montréal | Information Technologies (IT) |
| Atlas Copco Compressors Canada | Dollard Des Ormeaux | Life Sciences and Health Technologies (LSHT), Compressors |
| Atlas Pharma | Montréal | Life Sciences and Health Technologies (LSHT) |
| Atlas Pharma Inc | L Rap | Analytical & Testing Laboratories |
| ATM Doctor Inc | Laval | Automated Teller Manufacturers & Wholesalers |
| ATM Network | Montréal | Automated Teller Manufacturers & Wholesalers |
| Atomic Fiction | Montréal | Information Technologies (IT) |
Publicité (Desktop) Publicité (Mobile) |
| Atsenti | Casavant Ouest | Life Sciences and Health Technologies (LSHT) |
| Attachmate | Pointe-Claire | Information Technologies (IT) |
| Attraction Images | Montréal | Tout Entreprises et services |
| Audio Contrôle | Est | Life Sciences and Health Technologies (LSHT) |
| Audio Postproduction SPR Inc. | Montréal | Information Technologies (IT) |
| Audiokinetic | Montréal | Information Technologies (IT) |
| Audisoft Technologie Inc | Boucherville | Advertising Agencies |
| Aust & Hachmann (Canada) Ltd | Pointe-Claire | Agri-food |
| Auticonsult Canada | Étage | Information Technologies (IT) |
| Auto Diesel 119483 Canada Inc | Laval | Auto Part Manufacturers & Wholesalers |
