| 9141-2148 Québec Inc | Westmount | Cleaning Services, Cleaning Service |
| A.P. PACIFIC Nettoyage de Tapis | Laval | Cleaners (Buildings & Carpets), Home Decoration & Maintenance |
| ABP Consultants en personnel | Westmount | Tout Entreprises et services |
| ABZ Assurances-Insurance | Westmount | Car Insurance |
| ACA | Westmount | Collection Agencies |
| Académie Ballet Flamenco Lina Moros | Westmount | Tout Enseignement et savoir |
| Académie internationale de droit et de santé mentale | Québec | International Organizations |
| Acier Wirth Steel | Westmount | Aluminum |
| Action Sport Physio | Westmount | Tout Entreprises et services, Physiotherapy |
| Ad-Am Drummond Building Inc | Montréal | Cleaning Services, Cleaning Service |
Publicité (Desktop) Publicité (Mobile) |
| Adelman, Adam | Westmount | Boutiques |
| Adonis Construction Et Démolition | Montréal | Building Contractors |
| Advanceit Financial Corp | Westmount | Computer Networking |
| Adèle House Cleaning | Montréal | Cleaning Services, Cleaning Service |
| Agence Amical Demenagement | Montréal | Building & House Movers |
| Agences De Distribution Bijanard Ltée | Montréal | Building Material Manufacturers & Wholesalers |
| Air-Therm Inc | Westmount | Plumbing |
| Aleco | Saint-Léonard | Building Contractors |
| Altapex Construction | Montréal | Building Contractors |
| Altea Furniture | Westmount | Antique Restoration, Refinishing & Repair |
Publicité (Desktop) Publicité (Mobile) |
| Aluminium J P M Inc | Montréal | Building Contractors |
| AM1280 CFMB | Westmount | Tout Médias montréalais |
| Amadea S. Kezar Physiothérapie | Westmount | Physiotherapy |
| AmorChem Holdings Inc | Montréal | Life Sciences and Health Technologies (LSHT) |
| AmorChem Therapeutics Inc | Westmount Square | Life Sciences and Health Technologies (LSHT) |
| AMS Design Inc | Mont St Grégoire | Building Repair & Restoration |
| Anber Movers | Côte-Des-Neiges | Tout Entreprises et services |
| Anber Movers | Montréal | Moving Companies |
| Andre Poulin | Longueuil | Building Contractors |
| Andrea Flütsch | Westmount | Physiotherapy |
Publicité (Desktop) Publicité (Mobile) |
| Anglo-Canadian Houseware LP | Montréal | Appliance Manufacturers & Wholesalers |
| Antiquites Coach House Enr | Westmount | Antique Dealers |
| Anvil International Canada | Montréal | Building Contractors |
| APCHQ Montréal Métropolitain | Montréal | Building Contractors |
| APL Construction | Boucherville | Building Contractors |
| Aplast Canada Inc | Westmount | Home Improvement |
| AquaExpert | Westmount | Aquariums & Supplies |
| Armada Revêtement Extérieur et Toiture | Montréal | Building Contractors |
| Art Deco Buildings: Montreal | Montréal | Tout Arts et divertissement |
| Art Spécialisée En Construction Inc. | Côte Saint-Luc | Building Contractors |
Publicité (Desktop) Publicité (Mobile) |
| Artgold Fine Art Inc | Westmount | Antique Dealers |
| As du Lavage à Pression | Montréal | Building Exterior Cleaning |
| 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 |
| Astro Jet Service (1973) | Montréal | Building Exterior Cleaning |
| 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 |
