| Abbvie (Corporation) | Montréal | Life Sciences and Health Technologies (LSHT) |
| AbbVie Corporation | Montréal | Life Sciences and Health Technologies (LSHT) |
| ABF Systèmes Inc. | Boucherville | Tout Entreprises et services |
| Abra Electronics Corp. | Montréal | Tout Commerces au détail, Tout Entreprises et services |
| Abra Electronique Corp | Montréal | Antennas |
| Abrasive Technology N A Inc | Dorval | Abrasives, Tout Entreprises et services |
| Acadia | Montréal | Computer & Technology Assistance Programs |
| Acadia | Montréal | Computer & Technology Assistance Programs |
| Accenture | Montréal | Information Technologies (IT) |
| ACCEO Solutions | Montréal | Information Technologies (IT), Tout Informatique et internet |
Publicité (Desktop) Publicité (Mobile) |
| Accès Ingrédients | Boucherville | Agri-food |
| Acier Inoxydable Fafard Inc. | Boucherville | Tout Entreprises et services |
| Acier Leroux | Boucherville | Tout Entreprises et services |
| Acier Leroux Inc | Boucherville | Aluminum |
| Action.Grenier Autogroupe | Boucherville | Tout Commerces au détail |
| Ad Mats | Boucherville | Tout Commerces au détail |
| Adfast Corporation | Montréal | Tout Entreprises et services |
| Adhesifs Nacan | Boucherville | Adhesives & Glues |
| ADP Canada R-L | Montréal | Information Technologies (IT) |
| ADP Dealer Services | Boucherville | Information Technologies (IT) |
Publicité (Desktop) Publicité (Mobile) |
| Advanceit Financial Corp | Montréal | Computer Networking |
| Advanceit Financial Corp | Westmount | Computer Networking |
| Advanomics Corporation | Montréal | Life Sciences and Health Technologies (LSHT) |
| Advanomics Corporation Inc. | Étage | Life Sciences and Health Technologies (LSHT) |
| Aerospace Development Corp | Montréal | Aircraft & Private Jet Charter |
| Agence de placement Synergie | Boucherville | Tout Entreprises et services |
| Agence DoubleXpresso | Boucherville | Tout Entreprises et services |
| Agences Roger Boutin Inc | Boucherville | Business Brokers |
| AIR RESEARCH TECHNOLOGY INC. | Montréal | Aerospace |
| Air Sem Climatisation - Chauffage - Thermopompe | Boucherville | Air Purifiers |
Publicité (Desktop) Publicité (Mobile) |
| Air-Sodem Inc | Boucherville | Air Conditioning Contractors |
| Aj Tremblay | Boucherville | aj |
| Alerte 2000 Inc. | Boucherville | Tout Entreprises et services |
| Align Aerospace | Boucherville | Aviation Consultants & Services |
| Aliments Johnvince | Boucherville | Agri-food |
| Aliments Newly Weds | Boucherville | Agri-food |
| Alpa Import & Export Corp. | Montréal | Auto Part Manufacturers & Wholesalers |
| Alpharegul | Boucherville | Tout Entreprises et services |
| AmerisourceBergen Canada Corporation | Montréal | Life Sciences and Health Technologies (LSHT) |
| Ameublement Simard Inc | Boucherville | Furniture Stores |
Publicité (Desktop) Publicité (Mobile) |
| AMRIKART R.C. INC. | Boucherville | Aerospace |
| Anixter Canada | Boucherville | Information Technologies (IT) |
| Annie Perron | Boucherville | Balconies |
| APL Construction | Boucherville | Building Contractors |
| AQUACOUPE TECHNOLOGY INC. | Mirabel | Aerospace |
| Aquatech BM | Boucherville | Business & Trade Organizations |
| Arcs Gas & Chemical Corp | Pierrefonds | Chemicals |
| Ari Financial Services Inc | Laval | Car Leasing |
| Armoire & Vanité L M Inc | Boucherville | Cabinet Makers |
| Armoires Cuisines Action | Boucherville | Tout Entreprises et services |
