| ASEQ Alliance Pour La Santé Étudiante Au Québec | Montréal | Health Services |
| ASG Canada | Montréal | Information Technologies (IT) |
| ASI Computer Technologies (Canada) Corp | Montréal | Information Technologies (IT) |
| Asplundh Canada | Terrebonne | Life Sciences and Health Technologies (LSHT) |
| Assima Canada / Wizart Canada | Montréal | Information Technologies (IT) |
| Assista Medical | Hall | Life Sciences and Health Technologies (LSHT) |
| Association De Médecine Manuelle Du Québec | Montréal | Alternative Health |
| Association des conseillers en hébe... | Ahuntsic Et Cartierville | Tout Entreprises et services |
| Association des Hypnologues du Québec (1977) | Montréal | Alternative Health |
| Association des ressources interméd... | Quartier Latin Et Centre-Sud | Tout Communautés et société |
Publicité (Desktop) Publicité (Mobile) |
| Association des scouts du Canada | Villeray | Tout Arts et divertissement, Tout Communautés et société |
| Association Libérale Henri Bourassa | Montréal | Associations |
| Association Sociale Inca Canada | Montréal | Associations |
| Association Touristique des Laurent... | Mirabel | Tout Tourisme et hôtels |
| Assure Santé Inc | Montréal | Health Services |
| 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) |
| Astleywilk Healthcare Inc | Saint-Constant | Beauty & Fitness, Hairdressers & Beauty Salons |
| Astral Internet | Brossard | Tout Informatique et internet |
Publicité (Desktop) Publicité (Mobile) |
| AstraZeneca Canada | Longueuil | Life Sciences and Health Technologies (LSHT) |
| AT&T Canada | Centre-Ville | Tout Entreprises et services |
| Atanas-Plumbing & Heating | Montréal | Plumbing |
| ATD DESIGN SERVICES (4071468 CANADA INC.) | Sainte-Geneviève | Aerospace |
| Atek Canada | Montréal | Tout Informatique et internet |
| Atelier De Daria Centro Canada | Montréal | Furniture Stores |
| Ateliers pour la biodiversité | Saint-Henri | Tout Communautés et société, Tout Enseignement et savoir, Tout Entreprises et services |
| ATEM Canada Inc | Montréal | Information Technologies (IT) |
| Ates Médical Inc. | Saint-Bruno | Life Sciences and Health Technologies (LSHT) |
| AtGen Canada | Laval | Life Sciences and Health Technologies (LSHT) |
Publicité (Desktop) Publicité (Mobile) |
| ATHLETIC AND YOUTH CENTER/Hell. Comm. Montreal | Laval | Blue Pages |
| ATHLITIKOS OMILOS HELLAS | Montréal | Blue Pages |
| Atis technologies | Montréal | Life Sciences and Health Technologies (LSHT) |
| Atlas Copco Compressors Canada | Dollard Des Ormeaux | Life Sciences and Health Technologies (LSHT), Compressors |
| Atlas Pharma | Montréal | Life Sciences and Health Technologies (LSHT) |
| Atom Heart Records | Quartier Latin Et Centre-Sud | Tout Commerces au détail |
| Atsenti | Casavant Ouest | Life Sciences and Health Technologies (LSHT) |
| Audio Contrôle | Est | Life Sciences and Health Technologies (LSHT) |
| Audrey Beauté Esthétique | Boucherville | Health and Beauty |
| Audrey Charland - Acupuncteure | Montréal | Alternative Health |
Publicité (Desktop) Publicité (Mobile) |
| Audrey Coiteux - Ostéopathe - D O & Thérapie Holistique | Montréal | Alternative Health |
| Aust & Hachmann (Canada) Ltd | Pointe-Claire | Agri-food |
| Auticonsult Canada | Étage | Information Technologies (IT) |
| Auto Diesel 119483 Canada Inc | Laval | Auto Part Manufacturers & Wholesalers |
| Auto Hall Canada | Montréal | Car Repair |
| Auto Hall Canada Pie IX Inc | Montréal | Automobiles, car Dealers |
| Auto Laser Canada | Montréal | Automobiles, car Dealers |
| Auto Martel Heroux | Anjou | Auto Body Repair & Painting Shops, Auto Repair Garages, Not Profit, Car Repair |
| Auto Rental Canada | Montréal | Auto Services |
| Autodéfense Taikido | Saint-Hubert | Health and Beauty |
