| Almaho Inc | Lévis | Anodizing |
| Alongi | Lachine | Tout Commerces au détail, Tout Entreprises et services |
| Alta Material Handling | Dorval | Tout Entreprises et services |
| Altrom/Auto-Camping - Dorval | Dorval | Auto Body Shop Equipment & Supplies |
| Always B Clean | Lachine | Home Improvement |
| Amacor Marketing | Dorval | Tout Commerces au détail |
| Amber Esthetics & Makeup Studio | Dorval | Beauty & Fitness, Hairdressers & Beauty Salons |
| 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) |
Publicité (Desktop) Publicité (Mobile) |
| Amenzone Fitness | Dorval | Fitness Gyms |
| American Airlines | Dorval | Airlines |
| Ameublement Euro Style | Dorval | Tout Commerces au détail |
| Ameublements De Bureau Intrtch | Dorval | Furniture Stores |
| AMJ Campbell Van Lines | Lachine | Tout Entreprises et services |
| AMS Physiotherapy & Rehabilitation Centre | Dorval | Physiotherapy |
| Andrew & Friends - 90 Day Challenge | Lachine | Beauty Salon Equipment & Supplies |
| Anixia | Lachine | Calendars |
| Annie Cyr Conseillère Indépendante Scentsy | Lachine | Aromatherapy |
| Anodisation Expert | Montréal | Anodizing |
Publicité (Desktop) Publicité (Mobile) |
| Anodisation Montréal Inc | Dorval | Anodizing |
| Aqua Performa | Dorval | Fitness Gyms |
| ARA robotique | Montréal | Information Technologies (IT) |
| ARCHIVES IRON MOUNTAIN | Lachine | Information Technologies (IT) |
| Arctic Glacier | Dorval | Tout Entreprises et services |
| Arena Pizzeria | Lachine | Pizza & Pizzerias |
| Arena Tasty Pizzeria Lachine Restaurant | Lachine | Pizza & Pizzerias |
| Ares Cuisine Head Office | Dorval | Appliance Manufacturers & Wholesalers |
| Armolan Furniture | Dorval | Cabinet Makers |
| Arrondissement de Lachine | Montréal | Tout Informations générales |
Publicité (Desktop) Publicité (Mobile) |
| Arrondissement de Lachine | Lachine | Not Profit, library |
| Arrow Electronics | Dorval | Tout Entreprises et services |
| Art Forge | Lachine | Art Foundries |
| ASCO Valve Canada | Dorval | Tout Entreprises et services |
| Ashley's Little Gift Shop | Lachine | Candles |
| Association des Techniciens en Sant... | Lachine | Tout Entreprises et services |
| Assurance123.ca | Lachine | Tout Entreprises et services |
| Atelier Centre Du Pneu Groupe Unik | Dorval | Tire Shop |
| Auberge St-Louis | Dorval | Apartment Hotels |
| Audionova Inc. | Dorval | Tout Commerces au détail |
Publicité (Desktop) Publicité (Mobile) |
| Auto Bugatti Inc. | Dorval | Tout Commerces au détail |
| Auto Camping | Lachine | Auto Part Manufacturers & Wholesalers |
| Auto Kool | Lachine | Auto Part Manufacturers & Wholesalers |
| Auto Sai Inc | Dorval | Tire Shop |
| Auto Shaltas Garage Inc | Lachine | Auto Body Shop |
| Autobus Montroyal Inc | Lachine | Chauffeur Services |
| Automaticash | Lachine | Automated Teller Manufacturers & Wholesalers |
| Autos Internationales Lachine | Lachine | Tout Commerces au détail |
| Avenant SST Inc | Lachine | Health Services |
| AVIATION MBBH Inc. | Dorval | Aerospace |
