| 9141-2148 Québec Inc | Westmount | Cleaning Services, Cleaning Service |
| A. E. Blake Sales Ltd. | Montréal | Tout Entreprises et services |
| A.E. Blake Sales | Montréal | Adhesives & Glues |
| ABP Consultants en personnel | Westmount | Tout Entreprises et services |
| Abra Electronics Corp. | Montréal | Tout Commerces au détail, Tout Entreprises et services |
| Abris & Auvents Atlas | Laval | Awning & Canopy Sales & Service |
| ABZ Assurances-Insurance | Westmount | Car Insurance |
| ACA | Westmount | Collection Agencies |
| Académie Ballet Flamenco Lina Moros | Westmount | Tout Enseignement et savoir |
| Acier Wirth Steel | Westmount | Aluminum |
Publicité (Desktop) Publicité (Mobile) |
| Acme Auvents Prestige | Brossard | Awning & Canopy Sales & Service |
| Acme Auvents Prestige | Montréal | Awning & Canopy Sales & Service |
| Acme Awnings Prestige | Montréal | Awning & Canopy Sales & Service |
| Action Sport Physio | Westmount | Tout Entreprises et services, Physiotherapy |
| Adelman, Adam | Westmount | Boutiques |
| ADMACO | Ville-Mont-Royal | Tout Commerces au détail |
| Advanceit Financial Corp | Westmount | Computer Networking |
| Air-Therm Inc | Westmount | Plumbing |
| Allied Technical Sales Inc | Laval | Architectural & Construction Specifications |
| Altea Furniture | Westmount | Antique Restoration, Refinishing & Repair |
Publicité (Desktop) Publicité (Mobile) |
| Aluminium Lmg | Montréal | Awning & Canopy Sales & Service |
| 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) |
| Andrea Flütsch | Westmount | Physiotherapy |
| Antiquites Coach House Enr | Westmount | Antique Dealers |
| Aplast Canada Inc | Westmount | Home Improvement |
| Applied Electronics Limited | Montréal | Audiovisual Equipment & Supplies |
| Applied Electronics Ltd. | Ville-Émard Et Côte-Saint-Paul | Tout Entreprises et services |
Publicité (Desktop) Publicité (Mobile) |
| AquaExpert | Westmount | Aquariums & Supplies |
| ARAHOVA SOUVLAKI MILE-END | Montréal | Home Decoration & Maintenance |
| ARAHOVA SOUVLAKI ST-LAURENT | Montréal | Home Decoration & Maintenance |
| ARAHOVA SOUVLAKI ST-LÉONARD | Saint-Léonard | Home Decoration & Maintenance |
| ARAHOVA SOUVLAKI – SIÈGE SOCIAL | Montréal | Home Decoration & Maintenance |
| Arrow Electronics | Dorval | Tout Entreprises et services |
| Artglass Windshield Replacements & Repairs | Laval | Auto Glass & Windshields |
| Artgold Fine Art Inc | Westmount | Antique Dealers |
| 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 de Serrures Martin's Swiss | Westmount | Bicycle Stores |
| Atelier Scissor House | Westmount | Beauty & Fitness, Hairdressers & Beauty Salons |
| Atlantic Provincial Sales | Mont-Royal | Bedding & Linens |
| Atrium Innovations Inc. | Westmount | Agri-food |
| Au Vent Installations Et Desinstallations | Montréal | Awning & Canopy Sales & Service |
| Auvent & Solariums Signature Inc | Varennes | Awning & Canopy Sales & Service |
| Auvent Canevas du Nord | Laval | Awning & Canopy Sales & Service |
