| 2G Solutions | Montréal | Tout Informatique et internet |
| 9141-2148 Québec Inc | Westmount | Cleaning Services, Cleaning Service |
| 99andbeyond (anciennement Solutions CognitiveChem inc.) | Dépatie | Life Sciences and Health Technologies (LSHT) |
| A + Solutions Home Healthcare Inc | Montréal | Care Homes |
| A V Solutions | Montréal | Audiovisual Equipment & Supplies, Audiovisual Equipment & Supplies Rental |
| ABF Systèmes Inc. | Boucherville | Tout Entreprises et services |
| Abilis Solutions | Centre-Ville | Tout Informatique et internet |
| Abilis Solutions | Montréal | Information Technologies (IT) |
| ABP Consultants en personnel | Westmount | Tout Entreprises et services |
| ABZ Assurances-Insurance | Westmount | Car Insurance |
Publicité (Desktop) Publicité (Mobile) |
| ACA | Westmount | Collection Agencies |
| Académie Ballet Flamenco Lina Moros | Westmount | Tout Enseignement et savoir |
| ACCEO Solutions | Montréal | Information Technologies (IT), Tout Informatique et internet |
| ACCEO Solutions | Montréal | Computer Consultants |
| ACCEO Solutions Inc. | Montréal | Tout Informatique et internet |
| Accounting and Tax Solutions | Montréal | Bookkeeping Software & Accounting Systems |
| Acier Wirth Steel | Westmount | Aluminum |
| Action Sport Physio | Westmount | Tout Entreprises et services, Physiotherapy |
| Actweb Solutions | Petite-Patrie | Tout Commerces au détail, Tout Entreprises et services |
| Adelman, Adam | Westmount | Boutiques |
Publicité (Desktop) Publicité (Mobile) |
| Advanceit Financial Corp | Westmount | Computer Networking |
| Affichage Solutions | Vaudreuil-Dorion | Tout Entreprises et services |
| Air-Therm Inc | Westmount | Plumbing |
| Akufen Atelier Créatif | Petite-Patrie | Tout Entreprises et services |
| ALCiE Integrated Business Solutions | Montréal | Tout Informatique et internet |
| Aldea Solutions Inc | Montréal | Information Technologies (IT) |
| Aldeavision Inc. | Montréal | Tout Entreprises et services |
| Alstom Transport Information Solutions | Montréal | Information Technologies (IT) |
| Altea Furniture | Westmount | Antique Restoration, Refinishing & Repair |
| AM1280 CFMB | Westmount | Tout Médias montréalais |
Publicité (Desktop) Publicité (Mobile) |
| 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 |
| Anjuna Airline Solutions-Canada | Montréal | Airlines |
| Antiquites Coach House Enr | Westmount | Antique Dealers |
| Aplast Canada Inc | Westmount | Home Improvement |
| Applications Adaptées & Solutions I... | Charlevoix | Tout Informatique et internet |
| AquaExpert | Westmount | Aquariums & Supplies |
| Architech Solutions Bâtiments | Laval | Architects |
Publicité (Desktop) Publicité (Mobile) |
| Artgold Fine Art Inc | Westmount | Antique Dealers |
| 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 |
| Association des Éditeurs de Langue... | Westmount | Tout Entreprises et services |
| AST Clinical solutions | Laval | Life Sciences and Health Technologies (LSHT) |
| AST Clinical solutions | Albert-Einstein | Life Sciences and Health Technologies (LSHT) |
| Atelier | Verdun | Baskets |
| Atelier 10 | Petite-Patrie | Tout Commerces au détail, Tout Entreprises et services |
