| Amber Esthetics & Makeup Studio | Dorval | Beauty & Fitness, Hairdressers & Beauty Salons |
| Amcor | Dorval | Tout Entreprises et services |
| AMEC AMÉRIQUES LIMITÉE | Dorval | Life Sciences and Health Technologies (LSHT) |
| Amenzone Fitness | Dorval | Fitness Gyms |
| American Airlines | Dorval | Airlines |
| Ameublement Euro Style | Dorval | Tout Commerces au détail |
| Ameublements De Bureau Intrtch | Dorval | Furniture Stores |
| AmorChem Holdings Inc | Montréal | Life Sciences and Health Technologies (LSHT) |
| AmorChem Therapeutics Inc | Westmount Square | Life Sciences and Health Technologies (LSHT) |
| AMS Physiotherapy & Rehabilitation Centre | Dorval | Physiotherapy |
Publicité (Desktop) Publicité (Mobile) |
| Aménagement Paysager WESTPRO Landscaping | Montréal | Landscaping |
| Andrea Flütsch | Westmount | Physiotherapy |
| Anodisation Montréal Inc | Dorval | Anodizing |
| Antiquites Coach House Enr | Westmount | Antique Dealers |
| Antirouille DURA TECH Inc. | Western Quebec | Tout Commerces au détail |
| Aplast Canada Inc | Westmount | Home Improvement |
| Aqua Performa | Dorval | Fitness Gyms |
| AquaExpert | Westmount | Aquariums & Supplies |
| ARA robotique | Montréal | Information Technologies (IT) |
| Arctic Glacier | Dorval | Tout Entreprises et services |
Publicité (Desktop) Publicité (Mobile) |
| Ares Cuisine Head Office | Dorval | Appliance Manufacturers & Wholesalers |
| Armolan Furniture | Dorval | Cabinet Makers |
| Arrow Electronics | Dorval | Tout Entreprises et services |
| Artgold Fine Art Inc | Westmount | Antique Dealers |
| ASCO Valve Canada | Dorval | Tout Entreprises et services |
| ASG Canada | Montréal | Information Technologies (IT) |
| Aspirateur West Island Ltd | Montréal | Tout Commerces au détail |
| Aspirateur West Island Vacuum | Montréal | Appliance Manufacturers & Wholesalers |
| Aspler Joseph Jutras Inc | Westmount | Car Insurance |
| Assemblée Quaker de Montréal | Westmount | Tout Communautés et société |
Publicité (Desktop) Publicité (Mobile) |
| Association des Médecins omnipratic... | Westmount | Tout Communautés et société |
| Association des Éditeurs de Langue... | Westmount | Tout Entreprises et services |
| Atelier Blow | Westmount | Beauty & Fitness, Hairdressers & Beauty Salons |
| Atelier Centre Du Pneu Groupe Unik | Dorval | Tire Shop |
| Atelier de Serrures Martin's Swiss | Westmount | Bicycle Stores |
| Atelier Scissor House | Westmount | Beauty & Fitness, Hairdressers & Beauty Salons |
| Atrium Innovations Inc. | Westmount | Agri-food |
| Auberge St-Louis | Dorval | Apartment Hotels |
| Audi West Island | Dollard Des Ormeaux | Automobiles, car Dealers |
| Audiology Centre West | Montréal | Audiologists |
Publicité (Desktop) Publicité (Mobile) |
| Audionova Inc. | Dorval | Tout Commerces au détail |
| Auto Bugatti Inc. | Dorval | Tout Commerces au détail |
| Auto Sai Inc | Dorval | Tire Shop |
| Avataq Institut Culturel | Westmount | Arts & Cultural Organizations & Centres |
| Avenue Des Arts | Westmount | Art Materials & Supplies |
| AVIATION MBBH Inc. | Dorval | Aerospace |
| Avis | Dorval | Tout Commerces au détail |
| Aviva Solutions Inc. | Dorval | Tout Informatique et internet |
| Axion Acupuncture Clinic | Westmount | Acupuncturists |
| Azad Fine Chemicals | Dorval | Chemicals |
