| Airtrades Transitaires | Dorval | Tout Entreprises et services |
| AkioSoft | Ouest | Life Sciences and Health Technologies (LSHT) |
| Alain Couture | Montréal | Couture, COUTURE |
| Alarme Sentinelle | Dorval | Tout Entreprises et services |
| Albuca | Pointe-Claire | Life Sciences and Health Technologies (LSHT) |
| Alcatel-Lucent Canada | Montréal | Information Technologies (IT) |
| Alcoa Canada | Montréal | Aluminum |
| Alcoa Canada Cie | Montréal | Aluminum, Aluminum Fabricators |
| Alerte fissure inc. | Montréal | Tout Entreprises et services |
| Alice and smith | Montréal | Information Technologies (IT) |
Publicité (Desktop) Publicité (Mobile) |
| Aligo | Montréal | Information Technologies (IT) |
| Aliments Cell Inc. | Pointe-Claire | Agri-food |
| Aliments Conagra Canada Inc. | Boisbriand | Agri-food |
| Aliments Dole Canada | Laval | Agri-food |
| Aliments Ed Foods Inc. | Pointe-Claire | Agri-food |
| Aliments LUDA | Pointe-Claire | Tout Entreprises et services |
| Aliments Morehouse Canada Inc | Lachine | Agri-food |
| Aliments Noble Inc. | Pointe-Claire | Agri-food |
| Aliments Ronzoni du Canada (Les) | Montréal | Agri-food |
| Allbudget Moving & Storage-Canada | Montréal | Moving Companies |
Publicité (Desktop) Publicité (Mobile) |
| Allez-Up | Pointe-Saint-Charles | Tout Commerces au détail |
| Alliages Unifiés | Dorval | Tout Entreprises et services |
| Alliance de la Fonction Publique du Canada | Montréal | Community Service & Charitable Organizations |
| Allied Universal Security Services | Dorval | Tout Entreprises et services |
| Alta Material Handling | Dorval | Tout Entreprises et services |
| Altair Engineering Canada | Montréal | Information Technologies (IT) |
| Altaï Canada | Montréal | Tout Tourisme et hôtels |
| Alten Canada Inc | Montréal | Information Technologies (IT) |
| Alto Shaam Canada | Montréal | Commercial Kitchen Equipment |
| Altrom/Auto-Camping - Dorval | Dorval | Auto Body Shop Equipment & Supplies |
Publicité (Desktop) Publicité (Mobile) |
| Amacor Marketing | Dorval | Tout Commerces au détail |
| Amazonia General Store | Pointe-Claire | Bedding & Linens |
| Amber Esthetics & Makeup Studio | Dorval | Beauty & Fitness, Hairdressers & Beauty Salons |
| Amc Canada | Montréal | Airlines |
| Amcor | Dorval | Tout Entreprises et services |
| AMD Ritmed Inc. | Québec | Life Sciences and Health Technologies (LSHT) |
| AMEC AMÉRIQUES LIMITÉE | Dorval | Life Sciences and Health Technologies (LSHT) |
| Amenzone Fitness | Dorval | Fitness Gyms |
| Amerella du Canada Ltée | Montréal | Tout Entreprises et services |
| Ameresco Canada Inc | Montréal | Life Sciences and Health Technologies (LSHT) |
Publicité (Desktop) Publicité (Mobile) |
| American Airlines | Dorval | Airlines |
| American Iron & Metal Co. Inc. | Montréal | Tout Entreprises et services |
| AmerisourceBergen Canada Corporation | Montréal | Life Sciences and Health Technologies (LSHT) |
| Ameublement Euro Style | Dorval | Tout Commerces au détail |
| Ameublement Place à Téqui | Pointe-Aux-Trembles | Appliance Repair |
| Ameublements De Bureau Intrtch | Dorval | Furniture Stores |
| Ameublements El Ran Ltée | Pointe-Claire | Furniture Stores |
| Ameublements Thomasville | Pointe-Claire | Furniture Stores |
| Amplex Chemical Products Ltd | Pointe-Claire | Chemicals |
| AMS Physiotherapy & Rehabilitation Centre | Dorval | Physiotherapy |
