| Altrom/Auto-Camping - Dorval | Dorval | Auto Body Shop Equipment & Supplies |
| ALUBOX (DIVISION DE JE LORTIE COMPAGNIE LTÉE) | Montréal | Aerospace |
| Amacor Marketing | Dorval | Tout Commerces au détail |
| 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 |
Publicité (Desktop) Publicité (Mobile) |
| AMESYS | Montréal | Aerospace |
| Ameublement Euro Style | Dorval | Tout Commerces au détail |
| Ameublements De Bureau Intrtch | Dorval | Furniture Stores |
| AMP Réfrigération | Saint-Jean | Air Conditioning Contractors |
| AMPHENOL AIR LB NORTH AMERICA INC. | Saint-Hubert | Aerospace |
| Amphenol Air LB North America, Inc | Brossard | Tout Entreprises et services |
| AMRIKART R.C. INC. | Boucherville | Aerospace |
| AMS Physiotherapy & Rehabilitation Centre | Dorval | Physiotherapy |
| André Lemieux Climatisation | Brossard | Air Conditioning Contractors |
| Ang Heating Products Inc | Montréal | Air Conditioning Contractors |
Publicité (Desktop) Publicité (Mobile) |
| Angel Climatisation Inc | Pierrefonds | Air Purifiers |
| Anjuna Airline Solutions-Canada | Montréal | Airlines |
| Annexair Inc | Montréal | Air Conditioning Systems & Parts |
| Anodisation Montréal Inc | Dorval | Anodizing |
| AP&C Revêtements et Poudres Avancées | Montréal | Aerospace |
| AP&C Revêtements et Poudres Avancées | Montréal | Aerospace |
| Apex Aérospatial Inc | Montréal | Aircraft Maintenance, Service & Storage |
| APS Aviation Inc | Montréal | Airlines |
| Aqua Performa | Dorval | Fitness Gyms |
| AQUACOUPE TECHNOLOGY INC. | Mirabel | Aerospace |
Publicité (Desktop) Publicité (Mobile) |
| Aquaxpert Inc | Greenfield Park | Air Conditioning Contractors |
| ARA robotique | Montréal | Information Technologies (IT) |
| Arctic Glacier | Dorval | Tout Entreprises et services |
| Ares Cuisine Head Office | Dorval | Appliance Manufacturers & Wholesalers |
| Armolan Furniture | Dorval | Cabinet Makers |
| Arrow Electronics | Dorval | Tout Entreprises et services |
| ARTEC TECHNOLOGIES | Montréal | Aerospace |
| ASCO Valve Canada | Dorval | Tout Entreprises et services |
| ASM MOTOSPORT | Saint-Jean-Sur-Richelieu | Aircraft & Flight Schools |
| Association des scouts du Canada | Villeray | Tout Arts et divertissement, Tout Communautés et société |
Publicité (Desktop) Publicité (Mobile) |
| Association pour l'air pur (ALAP) | Verchères | Tout Communautés et société |
| ASSYSTEM PRODUCT ENGINEERING CANADA | Montréal | Aerospace |
| Atd Design & Manufacturing Services Inc. | Montréal | Aircraft Parts, Engines & Avionics |
| ATD DESIGN SERVICES (4071468 CANADA INC.) | Sainte-Geneviève | Aerospace |
| Atelier Centre Du Pneu Groupe Unik | Dorval | Tire Shop |
| Ats | Montréal | Air Cargo Service |
| Auberge St-Louis | Dorval | Apartment Hotels |
| Audionova Inc. | Dorval | Tout Commerces au détail |
| Auto Bugatti Inc. | Dorval | Tout Commerces au détail |
| Auto Sai Inc | Dorval | Tire Shop |
