| 9141-2148 Québec Inc | Westmount | Cleaning Services, Cleaning Service |
| A La Clinique Dentaire Dr Joseph Henry | Montréal | Automobiles, Dentists, Not Profit |
| ABC Drain | Montréal | Plumbing |
| Abou-Nasr Mona Dr | Saint-Léonard | Automobiles, Dentists, Not Profit |
| 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 |
| Académie internationale de droit et... | Centre-Ville | Tout Communautés et société, Tout Informations générales |
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| Acef Sud-Ouest de Montréal | Ville-Émard Et Côte-Saint-Paul | Tout Communautés et société |
| Acier Wirth Steel | Westmount | Aluminum |
| Action Sport Physio | Westmount | Tout Entreprises et services, Physiotherapy |
| Action travail des femmes | Montréal | Tout Communautés et société, Tout Entreprises et services |
| Acupuncteure Claire Lamarche | Drummondville | Acupuncturists |
| Ad-Am Drummond Building Inc | Montréal | Cleaning Services, Cleaning Service |
| Adelman, Adam | Westmount | Boutiques |
| Advanceit Financial Corp | Westmount | Computer Networking |
| AEV Rendering | Montréal | Architectural Drawing |
| AGIDD-SMQ | Montréal | Tout Communautés et société |
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| Air-Therm Inc | Westmount | Plumbing |
| Alaby Joseph Dr | Saint-Lambert | Dentists |
| Alguire Normand Dr | Laval | Chiropractors |
| Alimentation Raymond Drouin Inc | Longueuil | Not Profit, Grocery Stores |
| Altea Furniture | Westmount | Antique Restoration, Refinishing & Repair |
| AM1280 CFMB | Westmount | Tout Médias montréalais |
| Amadea S. Kezar Physiothérapie | Westmount | Physiotherapy |
| Ambayec Rosario Dr | Montréal | Dentists |
| AMICO DRAMEX | Brossard | Tout Entreprises et services |
| AmorChem Holdings Inc | Montréal | Life Sciences and Health Technologies (LSHT) |
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| AmorChem Therapeutics Inc | Westmount Square | Life Sciences and Health Technologies (LSHT) |
| Andrea Flütsch | Westmount | Physiotherapy |
| Anne Drouin, artiste peintre | Sainte-Julie | Tout Arts et divertissement |
| Anthony Mikhayel Dr | Montréal | Dentists |
| Antiquites Coach House Enr | Westmount | Antique Dealers |
| Antirouille Krown Drummondville | Drummondville | Aluminum, Aluminum Products |
| Anto Youssef Dr | Montréal | Dentists |
| Aplast Canada Inc | Westmount | Home Improvement |
| Aptech Services Canada Ltée | Drvl | Computer Accessories & Supplies |
| AquaExpert | Westmount | Aquariums & Supplies |
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| Arches Perspectives | Montréal | Architectural Drawing |
| Art-G | Laval | Architectural Drawing |
| Artefactum | Montréal | Architectural Drawing |
| Artgold Fine Art Inc | Westmount | Antique Dealers |
| ASM Performing Arts - Acting School | Ahuntsic Et Cartierville | Tout Enseignement et savoir |
| 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 |
| Association pour les droits des tra... | Montréal | Tout Communautés et société |
