| 9141-2148 Québec Inc | Westmount | Cleaning Services, Cleaning Service |
| Abe & Mary's | Montréal | Boutiques |
| 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 |
| Acier Wirth Steel | Westmount | Aluminum |
| Action Sport Physio | Westmount | Tout Entreprises et services, Physiotherapy |
| Adam Et Eve | Montréal | Boutiques |
| Addition Elle | Montréal | Boutiques |
Publicité (Desktop) Publicité (Mobile) |
| Adelman, Adam | Westmount | Boutiques |
| Adrien Yves Lighting Design | Montréal | Boutiques |
| Advanceit Financial Corp | Westmount | Computer Networking |
| Agence Emilie Moda | Montréal | Boutiques |
| Air-Therm Inc | Westmount | Plumbing |
| Akufen Atelier Créatif | Petite-Patrie | Tout Entreprises et services |
| Ali Jeans | Montréal | Boutiques |
| Altea Furniture | Westmount | Antique Restoration, Refinishing & Repair |
| AM1280 CFMB | Westmount | Tout Médias montréalais |
| Amadea S. Kezar Physiothérapie | Westmount | Physiotherapy |
Publicité (Desktop) Publicité (Mobile) |
| American Apparel | Montréal | Boutiques |
| AmorChem Holdings Inc | Montréal | Life Sciences and Health Technologies (LSHT) |
| AmorChem Therapeutics Inc | Westmount Square | Life Sciences and Health Technologies (LSHT) |
| Anation | Montréal | Boutiques |
| Andrea Flütsch | Westmount | Physiotherapy |
| Angkor Pich Boutique | Montréal | Boutiques |
| Antiquites Coach House Enr | Westmount | Antique Dealers |
| Aplast Canada Inc | Westmount | Home Improvement |
| Application Siriz | Montréal | Boutiques |
| Applications Glue Inc, Les | Montréal | Boutiques |
Publicité (Desktop) Publicité (Mobile) |
| AquaExpert | Westmount | Aquariums & Supplies |
| Arden Holdings Inc | Montréal | Boutiques |
| Aritmetik | Brossard | Boutiques |
| Armada par Men's Room | Quartier Latin Et Centre-Sud | Tout Commerces au détail |
| Artgold Fine Art Inc | Westmount | Antique Dealers |
| Asamae | Brossard | Boutiques |
| Aspler Joseph Jutras Inc | Westmount | Car Insurance |
| Assemblée Quaker de Montréal | Westmount | Tout Communautés et société |
| Association de parents de Mont-Roya... | Ville-Mont-Royal | Tout Communautés et société |
| Association des Médecins omnipratic... | Westmount | Tout Communautés et société |
Publicité (Desktop) Publicité (Mobile) |
| Association des Éditeurs de Langue... | Westmount | Tout Entreprises et services |
| Atelier | Verdun | Baskets |
| Atelier 10 | Petite-Patrie | Tout Commerces au détail, Tout Entreprises et services |
| Atelier 1846 | Franklin | Furniture Stores |
| Atelier 213 Inc. | Chomedey | Tout Arts et divertissement |
| Atelier 739 | Montréal | Arts & Crafts Stores |
| Atelier A | Montréal | Cabinet Makers |
| Atelier A L'Ecart | Longueuil | Audiovisual Production Services |
| Atelier Anaka | Montréal | Beds |
| Atelier Audio | Montréal | Audiovisual Equipment & Supplies |
