| Adare Pharmatech Canada | Mont-Saint-Hilaire | Life Sciences and Health Technologies (LSHT) |
| ADD Canada Co. | Kirkland | Tout Entreprises et services, Tout Informatique et internet |
| ADD CANADA COMPANY | Pointe-Claire | Information Technologies (IT) |
| Adelman, Adam | Westmount | Boutiques |
| Adhesifs Forbo (Canada) Ltée | Pointe-Claire | Tout Entreprises et services |
| ADM Canada | Lachine | Tout Entreprises et services |
| ADP Canada Inc. | Anjou | Tout Entreprises et services |
| ADP Canada R-L | Montréal | Information Technologies (IT) |
| ADT Canada | Montréal | Information Technologies (IT) |
| ADT Services de Sécurité Canada Inc... | Montréal | Tout Entreprises et services |
Publicité (Desktop) Publicité (Mobile) |
| Adtran Canada | Montréal | Information Technologies (IT) |
| Advanceit Financial Corp | Westmount | Computer Networking |
| Aei Aviation (Canada) Inc. | Brossard | Aircraft Parts, Engines & Avionics |
| Aerospace Concepts of Canada Inc | Montréal | Aviation Consultants & Services |
| Aerzen Canada Inc. | Vaudreuil-Dorion | Tout Entreprises et services |
| AES Chemunex Canada | Laval | Life Sciences and Health Technologies (LSHT) |
| Affacturage Canada Inc. | Dorval | Tout Entreprises et services |
| Affichage Solutions | Vaudreuil-Dorion | Tout Entreprises et services |
| Agence Parcs Canada | Montréal | Not Profit, library |
| Agilent Technologies Canada Inc | Montréal | Life Sciences and Health Technologies (LSHT) |
Publicité (Desktop) Publicité (Mobile) |
| Agilent Technologies Canada Inc | Montréal | Life Sciences and Health Technologies (LSHT) |
| AGRICULTURE AND AGRI-FOOD CANADA | Montréal | Blue Pages |
| Air Canada Cargo | Montréal | Airlines |
| Air Canada Reservations | Montréal | Airlines |
| Air Création Canada Inc | Saint-Mathieu-De-Beloeil | Aircraft & Flight Schools |
| Air-Therm Inc | Westmount | Plumbing |
| Alain Couture | Montréal | Couture, COUTURE |
| Alcatel-Lucent Canada | Montréal | Information Technologies (IT) |
| ALCiE Integrated Business Solutions | Montréal | Tout Informatique et internet |
| Alcoa Canada | Montréal | Aluminum |
Publicité (Desktop) Publicité (Mobile) |
| Alcoa Canada Cie | Montréal | Aluminum, Aluminum Fabricators |
| Aldea Solutions Inc | Montréal | Information Technologies (IT) |
| Aldeavision Inc. | Montréal | Tout Entreprises et services |
| Alice and smith | Montréal | Information Technologies (IT) |
| Aligo | Montréal | Information Technologies (IT) |
| Aliments Conagra Canada Inc. | Boisbriand | Agri-food |
| Aliments Dole Canada | Laval | Agri-food |
| Aliments Morehouse Canada Inc | Lachine | Agri-food |
| Aliments Ronzoni du Canada (Les) | Montréal | Agri-food |
| Allbudget Moving & Storage-Canada | Montréal | Moving Companies |
Publicité (Desktop) Publicité (Mobile) |
| Alliance de la Fonction Publique du Canada | Montréal | Community Service & Charitable Organizations |
| Alstom Transport Information Solutions | Montréal | Information Technologies (IT) |
| Altair Engineering Canada | Montréal | Information Technologies (IT) |
| Altaï Canada | Montréal | Tout Tourisme et hôtels |
| Altea Furniture | Westmount | Antique Restoration, Refinishing & Repair |
| Alten Canada Inc | Montréal | Information Technologies (IT) |
| Alto Shaam Canada | Montréal | Commercial Kitchen Equipment |
| AM1280 CFMB | Westmount | Tout Médias montréalais |
| Amadea S. Kezar Physiothérapie | Westmount | Physiotherapy |
| Amc Canada | Montréal | Airlines |
