| Aerospace Group | Montréal | Aircraft Dealers |
| AEROSPACE WELDING | Blainville | Aerospace |
| Aerospace Welding Inc | Blainville | Tout Entreprises et services, Aviation Consultants & Services |
| AEROSPHERE | Pointe-Claire | Aerospace |
| Aerosystems International Inc. | Montréal | Aerospace, Tout Entreprises et services |
| Aerzen Canada Inc. | Vaudreuil-Dorion | Tout Entreprises et services |
| AES Chemunex Canada | Laval | Life Sciences and Health Technologies (LSHT) |
| Affacturage Canada Inc. | Dorval | Tout Entreprises et services |
| Agence Parcs Canada | Montréal | Not Profit, library |
| Agilent Technologies Canada Inc | Montréal | Life Sciences and Health Technologies (LSHT) |
Publicité (Desktop) Publicité (Mobile) |
| Agilent Technologies Canada Inc | Montréal | Life Sciences and Health Technologies (LSHT) |
| AGRICULTURE AND AGRI-FOOD CANADA | Montréal | Blue Pages |
| Air Canada Cargo | Montréal | Airlines |
| Air Canada Reservations | Montréal | Airlines |
| Air Création Canada Inc | Saint-Mathieu-De-Beloeil | Aircraft & Flight Schools |
| Air Data Inc | Mont-Royal | Aerospace, Aircraft Parts, Engines & Avionics, Tout Entreprises et services |
| AIR RESEARCH TECHNOLOGY INC. | Montréal | Aerospace |
| AIRCRAFT EQUIPMENT & SUPPORT SERVICES | Dorval | Aerospace |
| AIRNAV ELECTRONIC | Dorval | Aerospace |
| Alain Couture | Montréal | Couture, COUTURE |
Publicité (Desktop) Publicité (Mobile) |
| Alcatel-Lucent Canada | Montréal | Information Technologies (IT) |
| Alcoa Canada | Montréal | Aluminum |
| Alcoa Canada Cie | Montréal | Aluminum, Aluminum Fabricators |
| Alice and smith | Montréal | Information Technologies (IT) |
| Align Aerospace | Boucherville | Aviation Consultants & Services |
| Aligo | Montréal | Information Technologies (IT) |
| Aliments Conagra Canada Inc. | Boisbriand | Agri-food |
| Aliments Dole Canada | Laval | Agri-food |
| Aliments Morehouse Canada Inc | Lachine | Agri-food |
| Aliments Ronzoni du Canada (Les) | Montréal | Agri-food |
Publicité (Desktop) Publicité (Mobile) |
| Allbudget Moving & Storage-Canada | Montréal | Moving Companies |
| Alliance de la Fonction Publique du Canada | Montréal | Community Service & Charitable Organizations |
| Alphacasting Inc. | Montréal | Aerospace, Tout Entreprises et services |
| ALSIM | Montréal | Aerospace |
| ALTA PRÉCISION INC. | Anjou | Aerospace |
| Altair Engineering Canada | Montréal | Information Technologies (IT) |
| Altaï Canada | Montréal | Tout Tourisme et hôtels |
| Alten Canada Inc | Montréal | Information Technologies (IT) |
| ALTITUDE AEROSPACE | Montréal | Aerospace |
| Altitude Aerospace Inc | Montréal | Aircraft Maintenance, Service & Storage |
Publicité (Desktop) Publicité (Mobile) |
| Altitude Aerospace Inc | Montréal | Aircraft Maintenance, Service & Storage |
| Alto Shaam Canada | Montréal | Commercial Kitchen Equipment |
| ALUBOX (DIVISION DE JE LORTIE COMPAGNIE LTÉE) | Montréal | Aerospace |
| Amc Canada | Montréal | Airlines |
| AMD Ritmed Inc. | Québec | Life Sciences and Health Technologies (LSHT) |
| Amerella du Canada Ltée | Montréal | Tout Entreprises et services |
| Ameresco Canada Inc | Montréal | Life Sciences and Health Technologies (LSHT) |
| AmerisourceBergen Canada Corporation | Montréal | Life Sciences and Health Technologies (LSHT) |
| AMESYS | Montréal | Aerospace |
| AMPHENOL AIR LB NORTH AMERICA INC. | Saint-Hubert | Aerospace |
