| Addisson Électronique | Repentigny | Antennas, Battery Chargers |
| Adex Systems Inc. | Riviere-Des-Prairies | Tout Entreprises et services |
| Adhesifs Forbo (Canada) Ltée | Pointe-Claire | Tout Entreprises et services |
| ADI Global Distribution | Lachine | Tout Entreprises et services |
| ADM Canada | Lachine | Tout Entreprises et services |
| Admicom | Montréal | Bookkeeping Software & Accounting Systems |
| 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) |
| Aei Aviation (Canada) Inc. | Brossard | Aircraft Parts, Engines & Avionics |
| Aerospace Concepts of Canada Inc | Montréal | Aviation Consultants & Services |
| Aerus | Pointe-Claire | Central Vacuum Systems |
| Aerzen Canada Inc. | Vaudreuil-Dorion | Tout Entreprises et services |
| AES Chemunex Canada | Laval | Life Sciences and Health Technologies (LSHT) |
| Aesus Systems, Inc. | Pointe-Claire | Tout Entreprises et services |
| Affacturage Canada Inc. | Dorval | 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) |
| Agotech | Laval | Car Alarm Systems |
| AGRICULTURE AND AGRI-FOOD CANADA | Montréal | Blue Pages |
| AIM | Ahuntsic Et Cartierville | Tout Entreprises et services |
| Air Canada Cargo | Montréal | Airlines |
| Air Canada Reservations | Montréal | Airlines |
| Air Création Canada Inc | Saint-Mathieu-De-Beloeil | Aircraft & Flight Schools |
| Airco Den Bec | Longueuil | Air Conditioning Systems & Parts |
| Airnav Électronique Ltée | Dorval | Tout Entreprises et services |
| Airtec Contrôle | Saint-Hubert | Air Conditioning Systems & Parts |
Publicité (Desktop) Publicité (Mobile) |
| Alain Berthiaume CPA Inc | Longueuil | Bookkeeping Software & Accounting Systems |
| Alain Couture | Montréal | Couture, COUTURE |
| Alarme Securi-Tek | Montréal | Car Alarm Systems |
| Alarmes et Antivols Sécurimax Inc | Saint-Jérôme | Car Alarm Systems |
| Alcatel-Lucent Canada | Montréal | Information Technologies (IT) |
| Alcoa Canada | Montréal | Aluminum |
| Alcoa Canada Cie | Montréal | Aluminum, Aluminum Fabricators |
| ALDO Accessoires | Montréal | Air Conditioning Systems & Parts |
| Alert Fire Protection - Alert Sprinklers Inc | Châteauguay | Automatic Fire Sprinkler Systems |
| Alert Fire Protection - Alert Sprinklers Inc | Châteauguay | Automatic Fire Sprinkler Systems |
Publicité (Desktop) Publicité (Mobile) |
| Alfa Electronique | Villeray | Tout Commerces au détail, Tout Informatique et internet |
| 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 |
| Allia Expertise Inc | Saint-Bruno | Bookkeeping Software & Accounting Systems |
| Alliance de la Fonction Publique du Canada | Montréal | Community Service & Charitable Organizations |
