| 70 Mm Studio | Laval | Camera & Photo Equipment Stores |
| 9141-2148 Québec Inc | Westmount | Cleaning Services, Cleaning Service |
| AA Studios | Montréal | Information Technologies (IT) |
| ABP Consultants en personnel | Westmount | Tout Entreprises et services |
| ABZ Assurances-Insurance | Westmount | Car Insurance |
| ACA | Westmount | Collection Agencies |
| Academie de Flamenco Delphine Mantha | Centre-Ville | Tout Enseignement et savoir |
| Académie Ballet Flamenco Lina Moros | Westmount | Tout Enseignement et savoir |
| Académie de Flamenco des Laurentide... | Saint-Sauveur | Tout Enseignement et savoir |
| Acier Wirth Steel | Westmount | Aluminum |
Publicité (Desktop) Publicité (Mobile) |
| Action Sport Physio | Westmount | Tout Entreprises et services, Physiotherapy |
| Adelman, Adam | Westmount | Boutiques |
| Advanceit Financial Corp | Westmount | Computer Networking |
| Affordance Studio | Montréal | Information Technologies (IT) |
| Agora de la danse | Centre-Ville | Tout Arts et divertissement |
| Air-Therm Inc | Westmount | Plumbing |
| Alessandra's Beauty Studio | Montréal | Beauty & Fitness, Hairdressers & Beauty Salons |
| Altea Furniture | Westmount | Antique Restoration, Refinishing & Repair |
| AM1280 CFMB | Westmount | Tout Médias montréalais |
| Amadea S. Kezar Physiothérapie | Westmount | Physiotherapy |
Publicité (Desktop) Publicité (Mobile) |
| Amani Hair Studio Montreal | Montréal | Beauty & Fitness, Hairdressers & Beauty Salons |
| Amarie-Josée Rompré Photographe | Montréal | Tout Commerces au détail |
| Amber Esthetics & Makeup Studio | Dorval | Beauty & Fitness, Hairdressers & Beauty Salons |
| Amber Studio | Montréal | Information Technologies (IT) |
| AmorChem Holdings Inc | Montréal | Life Sciences and Health Technologies (LSHT) |
| AmorChem Therapeutics Inc | Westmount Square | Life Sciences and Health Technologies (LSHT) |
| Andrea Flütsch | Westmount | Physiotherapy |
| Anthony Rancourt | Ndg | Tout Commerces au détail |
| Antiquites Coach House Enr | Westmount | Antique Dealers |
| Aplast Canada Inc | Westmount | Home Improvement |
Publicité (Desktop) Publicité (Mobile) |
| AquaExpert | Westmount | Aquariums & Supplies |
| Archimed Studio | Laval | Computer Graphics Design & Animation |
| Art Studio Artelle | Montréal | Art Schools |
| Artgold Fine Art Inc | Westmount | Antique Dealers |
| Artifex Animation Studios | Montréal | Information Technologies (IT) |
| Artifice Studio | Longueuil | Information Technologies (IT) |
| Aspler Joseph Jutras Inc | Westmount | Car Insurance |
| Assemblée Quaker de Montréal | Westmount | Tout Communautés et société |
| Association des Médecins omnipratic... | Westmount | Tout Communautés et société |
| Association des Éditeurs de Langue... | Westmount | Tout Entreprises et services |
Publicité (Desktop) Publicité (Mobile) |
| Association pour la Promotion des D... | Montréal | Tout Arts et divertissement |
| Association québécoise des loisirs... | Saint-Léonard | Tout Arts et divertissement |
| Atelier Blow | Westmount | Beauty & Fitness, Hairdressers & Beauty Salons |
| Atelier de Serrures Martin's Swiss | Westmount | Bicycle Stores |
| Atelier Scissor House | Westmount | Beauty & Fitness, Hairdressers & Beauty Salons |
| Atrium Innovations Inc. | Westmount | Agri-food |
| Au Studio | Verdun | Beauty & Fitness, Hairdressers & Beauty Salons |
| Avataq Institut Culturel | Westmount | Arts & Cultural Organizations & Centres |
| Avenue Des Arts | Westmount | Art Materials & Supplies |
| Axion Acupuncture Clinic | Westmount | Acupuncturists |
