| 2G Solutions | Montréal | Tout Informatique et internet |
| 2MORO | Montréal | Aerospace |
| 40 Westt | Pointe-Claire | Tout Bars et restaurants |
| 9032-2253 Québec Inc | Pointe-Aux-Trembles | Aluminum |
| 9141-2148 Québec Inc | Westmount | Cleaning Services, Cleaning Service |
| 99andbeyond (anciennement Solutions CognitiveChem inc.) | Dépatie | Life Sciences and Health Technologies (LSHT) |
| A & R Fourniture Inc | Pointe-Aux-Trembles | Appliance Repair |
| A + Solutions Home Healthcare Inc | Montréal | Care Homes |
| A Ct | Pointe-Calumet | ct |
| A E M Q Association des Entrepreneurs en Maçonnerie du Québec | Pointe-Aux-Trembles | Association Management |
Publicité (Desktop) Publicité (Mobile) |
| A V Solutions | Montréal | Audiovisual Equipment & Supplies, Audiovisual Equipment & Supplies Rental |
| A.E. PETSCHE CANADA, INC. | Kirkland | Aerospace |
| AAA Canada | Montréal | Aerospace, Aircraft Maintenance, Service & Storage |
| Ab Mcmahon | Pointe-Claire | ab |
| ABEONA SYSTEMS INC. | Montréal | Life Sciences and Health Technologies (LSHT) |
| ABF Systèmes Inc. | Boucherville | Tout Entreprises et services |
| Abilis Solutions | Centre-Ville | Tout Informatique et internet |
| Abilis Solutions | Montréal | Information Technologies (IT) |
| ABIPA CANADA INC. | Laval | Aerospace |
| ABP | Montréal | Tout Commerces au détail, Tout Entreprises et services |
Publicité (Desktop) Publicité (Mobile) |
| 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 |
| 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 |
| ACSP-Québec | Montréal | Tout Entreprises et services |
Publicité (Desktop) Publicité (Mobile) |
| Action Santé De Pointe St-Charles | Montréal | Health Services |
| Action Scuba | Pointe-Claire | Tout Commerces au détail |
| Action Sport Physio | Westmount | Tout Entreprises et services, Physiotherapy |
| Action-Gardien | Pointe-Saint-Charles | Tout Informations générales |
| Actweb Solutions | Petite-Patrie | Tout Commerces au détail, Tout Entreprises et services |
| Acupuncteure Claire Lamarche | Drummondville | Acupuncturists |
| AD OPT | Montréal | Aerospace |
| ADACEL INC. | Brossard | Aerospace |
| Adapta Space | Pointe-Claire | Computer Accessories & Supplies |
| ADD CANADA COMPANY | Pointe-Claire | Information Technologies (IT) |
Publicité (Desktop) Publicité (Mobile) |
| Adelman, Adam | Westmount | Boutiques |
| Adhesifs Forbo (Canada) Ltée | Pointe-Claire | Tout Entreprises et services |
| Advanceit Financial Corp | Westmount | Computer Networking |
| ADVANTECH INC. | Dorval | Aerospace |
| Aerofil | Pointe-Claire | Life Sciences and Health Technologies (LSHT) |
| AERONAV NAVIGATION INTERNATIONAL | Pointe-Claire | Aerospace |
| Aeroneuf Instruments Ltée | Dorval | Aerospace, Aircraft Parts, Engines & Avionics |
| Aerospace Concepts of Canada Inc | Montréal | Aviation Consultants & Services |
| Aerospace Development Corp | Montréal | Aircraft & Private Jet Charter |
| Aerospace Group | Montréal | Aircraft Dealers |
