| AMS Physiotherapy & Rehabilitation Centre | Dorval | Physiotherapy |
| André Lemieux Climatisation | Brossard | Air Conditioning Contractors |
| Ang Heating Products Inc | Montréal | Air Conditioning Contractors |
| Angel Climatisation Inc | Pierrefonds | Air Purifiers |
| Anjuna Airline Solutions-Canada | Montréal | Airlines |
| Annexair Inc | Montréal | Air Conditioning Systems & Parts |
| Annie Cyr Conseillère Indépendante Scentsy | Lachine | Aromatherapy |
| Anodisation Montréal Inc | Dorval | Anodizing |
| Apex Aérospatial Inc | Montréal | Aircraft Maintenance, Service & Storage |
| APS Aviation Inc | Montréal | Airlines |
Publicité (Desktop) Publicité (Mobile) |
| Aqua Performa | Dorval | Fitness Gyms |
| 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 |
| Aroma Montreal | Montréal | Aromatherapy |
| Aroma Montréal | Montréal | Aromatherapy |
| Aromathicare | Montréal | Aromatherapy |
| Arrow Electronics | Dorval | Tout Entreprises et services |
Publicité (Desktop) Publicité (Mobile) |
| 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 |
| Association pour l'air pur (ALAP) | Verchères | Tout Communautés et société |
| Atd Design & Manufacturing Services Inc. | Montréal | Aircraft Parts, Engines & Avionics |
| 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 |
Publicité (Desktop) Publicité (Mobile) |
| Auto Sai Inc | Dorval | Tire Shop |
| Aviall Canada Ltd | Boisbriand | Aircraft Parts, Engines & Avionics |
| Aviation B L Inc | Brossard | Aircraft & Flight Schools |
| Aviation Led | Montréal | Aircraft Maintenance, Service & Storage |
| AVIATION MBBH Inc. | Dorval | Aerospace |
| Aviation Zenith | Saint-Hubert | Aircraft Parts, Engines & Avionics |
| Avior Integrated Products Inc | Laval | Aircraft Parts, Engines & Avionics |
| Avis | Dorval | Tout Commerces au détail |
| Aviva Solutions Inc. | Dorval | Tout Informatique et internet |
| Avsup Aviation Support | Sainte-Thérèse | Airlines |
Publicité (Desktop) Publicité (Mobile) |
| Azad Fine Chemicals | Dorval | Chemicals |
| Aéro Portail | Montréal | Airlines |
| Aéro-Mag 2000 Inc | Lachine | Aircraft Maintenance, Service & Storage |
| Aéroclub De Montréal | Saint-Hubert | Aircraft & Flight Schools |
| Aéroport De St Hubert | Saint-Hubert | Airports |
| 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 |
