| 1230 Électroniques | Lachine | Computer Repair & Cleaning |
| 123inkcartridges.ca | Lachine | Camera & Photo Equipment Stores |
| 9132-1000 Québec Inc | Lachine | Business & Trade Organizations |
| 9334-4349 Quebec Inc | Lachine | Pizza & Pizzerias |
| A Asselin & Fils Inc | Lachine | Plumbing |
| A Pex Discount Inc | Lachine | Bedding & Linens |
| A S T Inc | Montréal | Business & Trade Organizations |
| A+Quick Socal Media Business | Montréal | Advertising Agencies |
| Aai Encanteurs Assoc Intl | Lachine | Auctions |
| ABF Systèmes Inc. | Boucherville | Tout Entreprises et services |
Publicité (Desktop) Publicité (Mobile) |
| Abu-Lasia/ Matamin | Lachine | Baked Goods Wholesalers |
| Accessoires Rose Blanche | Lachine | Bakery Equipment, Bakery Supplies |
| Accord Expositions | Lachine | Tout Entreprises et services |
| Accès Ingrédients | Boucherville | Agri-food |
| ACI World | Montréal | Airports |
| Acier Inoxydable Fafard Inc. | Boucherville | Tout Entreprises et services |
| Acier Lachine Inc | Lachine | Aluminum |
| Acier Leroux | Boucherville | Tout Entreprises et services |
| Acier Leroux Inc | Boucherville | Aluminum |
| Action Graphix Longueil | Longueuil | Business Centres |
Publicité (Desktop) Publicité (Mobile) |
| Action.Grenier Autogroupe | Boucherville | Tout Commerces au détail |
| Active Business & Realty Inc | Mont-Royal | Business Brokers |
| Ad Mats | Boucherville | Tout Commerces au détail |
| Adelson Et Associés | Montréal | Business Insurance |
| Adhesifs Nacan | Boucherville | Adhesives & Glues |
| ADI Global Distribution | Lachine | Tout Entreprises et services |
| ADM Canada | Lachine | Tout Entreprises et services |
| ADP Dealer Services | Boucherville | Information Technologies (IT) |
| Advanced Business Analytics Inc. | Montréal | Physiotherapy |
| Aerotek | Montréal | Business Centres |
Publicité (Desktop) Publicité (Mobile) |
| Affiliated Sport Group | Lachine | Tout Entreprises et services |
| Agence de placement Synergie | Boucherville | Tout Entreprises et services |
| Agence DoubleXpresso | Boucherville | Tout Entreprises et services |
| Agence Imapro Inc | Lachine | Business & Trade Organizations |
| Agences Roger Boutin Inc | Boucherville | Business Brokers |
| AIDA Distribution | Lachine | Beverage Distributors & Bottlers |
| Air Pro Transport 2009 | Lachine | Air Cargo Service |
| Air Sem Climatisation - Chauffage - Thermopompe | Boucherville | Air Purifiers |
| Air-Sodem Inc | Boucherville | Air Conditioning Contractors |
| Aj Tremblay | Boucherville | aj |
Publicité (Desktop) Publicité (Mobile) |
| Alain Lessard | Montréal | Business Lawyers |
| Alain Normandin Rénovation | Lachine | Home Improvement |
| Albert Seliger | Montréal | Business Insurance |
| ALCiE Integrated Business Solutions | Montréal | Tout Informatique et internet |
| Alerte 2000 Inc. | Boucherville | Tout Entreprises et services |
| Alexandre Germain | Longueuil | Business Lawyers |
| Align Aerospace | Boucherville | Aviation Consultants & Services |
| Aliments Johnvince | Boucherville | Agri-food |
| Aliments Morehouse Canada Inc | Lachine | Agri-food |
| Aliments Newly Weds | Boucherville | Agri-food |
