| Amber Esthetics & Makeup Studio | Dorval | Beauty & Fitness, Hairdressers & Beauty Salons |
| Amc Canada | Montréal | Airlines |
| Amcor | Dorval | Tout Entreprises et services |
| AMEC AMÉRIQUES LIMITÉE | Dorval | Life Sciences and Health Technologies (LSHT) |
| Amenzone Fitness | Dorval | Fitness Gyms |
| American Airlines | Dorval | Airlines |
| American Airlines Inc | Hartford Conn | Air Cargo Service, Airlines |
| Ameublement Euro Style | Dorval | Tout Commerces au détail |
| Ameublements De Bureau Intrtch | Dorval | Furniture Stores |
| AMG Auto-Mécanique | Montréal | Auto Repair Garages, Not Profit, Car Repair |
Publicité (Desktop) Publicité (Mobile) |
| AMS Physiotherapy & Rehabilitation Centre | Dorval | Physiotherapy |
| Anjuna Airline Solutions-Canada | Montréal | Airlines |
| Anodisation Montréal Inc | Dorval | Anodizing |
| APS Aviation Inc | Montréal | Airlines |
| Aqua Performa | Dorval | Fitness Gyms |
| ARA robotique | Montréal | Information Technologies (IT) |
| Archives municipales | Montréal | Not Profit, library |
| Arctic Glacier | Dorval | Tout Entreprises et services |
| Ares Cuisine Head Office | Dorval | Appliance Manufacturers & Wholesalers |
| Armolan Furniture | Dorval | Cabinet Makers |
Publicité (Desktop) Publicité (Mobile) |
| Arrondissement de Lachine | Lachine | Not Profit, library |
| Arrondissement Verdun | Verdun | Not Profit, library |
| Arrow Electronics | Dorval | Tout Entreprises et services |
| Artothèque De Montréal | Montréal | Not Profit, Tout Arts et divertissement, library |
| ASCO Valve Canada | Dorval | Tout Entreprises et services |
| Association des Bibliothécaires du Québec | Beaconsfield | Not Profit, library |
| Atelier Centre Du Pneu Groupe Unik | Dorval | Tire Shop |
| Auberge du Dragon Rouge | Montréal | Automobiles, Not Profit, Restaurants |
| Auberge St-Louis | Dorval | Apartment Hotels |
| Audionova Inc. | Dorval | Tout Commerces au détail |
Publicité (Desktop) Publicité (Mobile) |
| Audiothèque | Montréal | Audiovisual Equipment & Supplies, Not Profit, library |
| Auto Bugatti Inc. | Dorval | Tout Commerces au détail |
| Auto Martel Heroux | Anjou | Auto Body Repair & Painting Shops, Auto Repair Garages, Not Profit, Car Repair |
| Auto Sai Inc | Dorval | Tire Shop |
| AVIATION MBBH Inc. | Dorval | Aerospace |
| Avis | Dorval | Tout Commerces au détail |
| Aviva Solutions Inc. | Dorval | Tout Informatique et internet |
| Avsup Aviation Support | Sainte-Thérèse | Airlines |
| Azad Fine Chemicals | Dorval | Chemicals |
| Aéro Portail | Montréal | Airlines |
Publicité (Desktop) Publicité (Mobile) |
| Aéroport International de Montréal-Trudeau YUL | Dorval | Airports |
| Aéroports de Montréal | Dorval | Airports |
| Aéroports de Montréal (ADM) | Dorval | Tout Entreprises et services, Tout Tourisme et hôtels |
| Aéroports Internationaux de Montréal-Trudeau et Montréal-Mirabel | Dorval | Airports |
| b At order | Dorval | at |
| Babysitting & Cleaning services | Dorval | Babysitting Services |
| Bain Depot | Dorval | Bathroom Accessories |
| Baked2go | Dorval | Tout Commerces au détail |
| Banq - Milieuxdoc | Montréal | Not Profit, library |
| Bar A Tapas Tapeo | Montréal | Automobiles, Not Profit, Restaurants |
