| 17Studios Ltée | Brossard | Shopping Mall |
| 2MORO | Montréal | Aerospace |
| A B C Cycles & Sports Ltée | Montréal | Bicycle Stores |
| A.C.C.E.S Ltée | Saint-Philippe | Furniture Stores |
| A.E. PETSCHE CANADA, INC. | Kirkland | Aerospace |
| AAA Canada | Montréal | Aerospace, Aircraft Maintenance, Service & Storage |
| ABIPA Canada Inc. | Boisbriand | Tout Entreprises et services |
| ABIPA CANADA INC. | Laval | Aerospace |
| Académie Aéronautique Inc | Mascouche | Aircraft & Flight Schools |
| Acier Omega Ltée | Saint-Léonard | Aluminum |
Publicité (Desktop) Publicité (Mobile) |
| Acier Vanguard Ltée | Dorval | Tout Entreprises et services |
| Acme Produits d'Ingénierie Ltée | Mont-Royal | Tout Entreprises et services |
| Acme Vacuum Compagnie Ltée | Montréal | Tout Entreprises et services |
| AD OPT | Montréal | Aerospace |
| Adacel Inc. | Brossard | Tout Entreprises et services |
| ADACEL INC. | Brossard | Aerospace |
| Adalia Services Préventifs Ltée | Saint-Léonard | Tout Commerces au détail |
| ADAS Inc. | Montréal | Aerial Photographers |
| Adhesifs Forbo (Canada) Ltée | Pointe-Claire | Tout Entreprises et services |
| ADVANTECH INC. | Dorval | Aerospace |
Publicité (Desktop) Publicité (Mobile) |
| Ae Fournier | Sainte-Therese | ae |
| Ae Rn | Roxboro | ae |
| Aegera Therapeutics, part of Pharmascience Inc. | Île-des-Soeurs | Life Sciences and Health Technologies (LSHT) |
| Aegon Dealer Services Inc - Eastern Office | Montréal | Automobiles, car Dealers, Car Dealers |
| Aei Aviation (Canada) Inc. | Brossard | Aircraft Parts, Engines & Avionics |
| Aemarket | Montréal | Computer Repair & Cleaning |
| Aequivalens Clinical Research | Montréal | Life Sciences and Health Technologies (LSHT) |
| aerial | Montréal | Information Technologies (IT) |
| Aerial Technologies Inc. | Montréal | Life Sciences and Health Technologies (LSHT) |
| Aero NextGen | Montréal | Aviation Consultants & Services |
Publicité (Desktop) Publicité (Mobile) |
| Aerofil | Pointe-Claire | Life Sciences and Health Technologies (LSHT) |
| Aerogram The Aerial MEDIA Aérien | Saint-Hubert | Aerial Advertising |
| Aerolineas Argentinas | Montréal | Airlines |
| AERONAV NAVIGATION INTERNATIONAL | Pointe-Claire | Aerospace |
| Aeroneuf Instruments Ltée | Dorval | Aerospace, Aircraft Parts, Engines & Avionics |
| AEROPORT DORVAL/MIRABEL | Dorval | Blue Pages |
| AEROPORT MIRABEL | Mirabel | Blue Pages |
| Aerospace Concepts of Canada Inc | Montréal | Aviation Consultants & Services |
| Aerospace Development Corp | Montréal | Aircraft & Private Jet Charter |
| Aerospace Group | Montréal | Aircraft Dealers |
Publicité (Desktop) Publicité (Mobile) |
| AEROSPACE WELDING | Blainville | Aerospace |
| Aerospace Welding Inc | Blainville | Tout Entreprises et services, Aviation Consultants & Services |
| Aerospatiale Kaycee | Dorval | Aircraft Parts, Engines & Avionics |
| AEROSPHERE | Pointe-Claire | Aerospace |
| Aerosystems International Inc. | Montréal | Aerospace, Tout Entreprises et services |
| Aerotechnick Inc | Montréal | Aircraft Parts, Engines & Avionics |
| Aerotek | Montréal | Business Centres |
| Aerus | Montréal | Air Purifiers |
| Aerus | Pointe-Claire | Central Vacuum Systems |
| Aerzen Canada Inc. | Vaudreuil-Dorion | Tout Entreprises et services |
