| Agence Markel | Longueuil | Computer Networking |
| Air Data Inc | Mont-Royal | Aerospace, Aircraft Parts, Engines & Avionics, Tout Entreprises et services |
| AIR RESEARCH TECHNOLOGY INC. | Montréal | Aerospace |
| AIRCRAFT EQUIPMENT & SUPPORT SERVICES | Dorval | Aerospace |
| AIRNAV ELECTRONIC | Dorval | Aerospace |
| AirScience | Pointe-Saint-Charles | Tout Entreprises et services |
| Akilon Technologies Inc | Longueuil | Computer Networking |
| AkioSoft | Ouest | Life Sciences and Health Technologies (LSHT) |
| Albuca | Pointe-Claire | Life Sciences and Health Technologies (LSHT) |
| Alchemy 24 Inc | Montréal | Computer Graphics Design & Animation |
Publicité (Desktop) Publicité (Mobile) |
| Alerte fissure inc. | Montréal | Tout Entreprises et services |
| Alexis Brosseau Infographie | Montréal | Computer Graphics Design & Animation |
| Alextreme Câblage | Brossard | Cabling Equipment & Supplies |
| Alias Informatique | Lemoyne | Computer Cabling, Installation & Service |
| Align Aerospace | Boucherville | Aviation Consultants & Services |
| Aligned Capital Partners inc. | Montréal | Computer Data Recovery |
| Aliments Cell Inc. | Pointe-Claire | Agri-food |
| Aliments Ed Foods Inc. | Pointe-Claire | Agri-food |
| Aliments LUDA | Pointe-Claire | Tout Entreprises et services |
| Aliments Noble Inc. | Pointe-Claire | Agri-food |
Publicité (Desktop) Publicité (Mobile) |
| Allez-Up | Pointe-Saint-Charles | Tout Commerces au détail |
| Allo'Tek | Montréal | Computer Repair & Cleaning |
| Alphacad Inc | Montréal | Computer Graphics Design & Animation |
| Alphacasting Inc. | Montréal | Aerospace, Tout Entreprises et services |
| Alphamosaik | Montréal | Computer Consultants |
| ALSIM | Montréal | Aerospace |
| ALTA PRÉCISION INC. | Anjou | Aerospace |
| ALTITUDE AEROSPACE | Montréal | Aerospace |
| Altitude Aerospace Inc | Montréal | Aircraft Maintenance, Service & Storage |
| Altitude Aerospace Inc | Montréal | Aircraft Maintenance, Service & Storage |
Publicité (Desktop) Publicité (Mobile) |
| Altopro Infographie Inc | Montréal | Computer Graphics Design & Animation |
| ALUBOX (DIVISION DE JE LORTIE COMPAGNIE LTÉE) | Montréal | Aerospace |
| Amazonia General Store | Pointe-Claire | Bedding & Linens |
| AMC Innovations | Montréal | Computer Cabling, Installation & Service |
| American Iron & Metal Co. Inc. | Montréal | Tout Entreprises et services |
| AMESYS | Montréal | Aerospace |
| Ameublement Place à Téqui | Pointe-Aux-Trembles | Appliance Repair |
| Ameublements El Ran Ltée | Pointe-Claire | Furniture Stores |
| Ameublements Thomasville | Pointe-Claire | Furniture Stores |
| AMPHENOL AIR LB NORTH AMERICA INC. | Saint-Hubert | Aerospace |
Publicité (Desktop) Publicité (Mobile) |
| Amplex Chemical Products Ltd | Pointe-Claire | Chemicals |
| AMRIKART R.C. INC. | Boucherville | Aerospace |
| An Ko | Pointe-Claire | kz |
| Andersen & Associates | Pointe-Claire | Civil Engineers |
| André Ink | Laval | Computer Accessories & Supplies |
| Anglo Eastern Ship Management Ltd. | Pointe-Claire | Tout Entreprises et services |
| Animatia | Montréal | Computer Graphics Design & Animation |
| Animation Gonflable | Longueuil | Computer Graphics Design & Animation |
| Anjinnov Construction | Montréal | Tout Entreprises et services |
| Antiquités du Village | Pointe-Claire | Antique Reproductions |
