| ADP Canada R-L | Montréal | Information Technologies (IT) |
| ADT Canada | Montréal | Information Technologies (IT) |
| ADT Services de Sécurité Canada Inc... | Montréal | Tout Entreprises et services |
| Adtran Canada | Montréal | Information Technologies (IT) |
| Aei Aviation (Canada) Inc. | Brossard | Aircraft Parts, Engines & Avionics |
| Aerospace Concepts of Canada Inc | Montréal | Aviation Consultants & 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 & Co | Anjou | Advertising Agencies |
Publicité (Desktop) Publicité (Mobile) |
| Agence De Recouvrement Serf Inc | Anjou | Collection Agencies |
| Agence Parcs Canada | Montréal | Not Profit, library |
| Agilent Technologies Canada Inc | Montréal | Life Sciences and Health Technologies (LSHT) |
| 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 |
| Alain Couture | Montréal | Couture, COUTURE |
| Alcatel-Lucent Canada | Montréal | Information Technologies (IT) |
Publicité (Desktop) Publicité (Mobile) |
| Alcoa Canada | Montréal | Aluminum |
| Alcoa Canada Cie | Montréal | Aluminum, Aluminum Fabricators |
| Alice and smith | Montréal | Information Technologies (IT) |
| Aligo | Montréal | Information Technologies (IT) |
| Aliment Select International | Anjou | Beverage Distributors & Bottlers |
| Alimentation Garde-Manger | Anjou | Tout Commerces au détail |
| 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) |
| AlimPlus | Anjou | Tout Bars et restaurants, Tout Entreprises et services |
| Alizeti | Anjou | Bicycle Manufacturers & Wholesalers |
| Allbudget Moving & Storage-Canada | Montréal | Moving Companies |
| Alliance de la Fonction Publique du Canada | Montréal | Community Service & Charitable Organizations |
| Allium Inc | Anjou | Balconies |
| Allstate Assurance: Antonino Scalia | Anjou | Car Insurance |
| Allstream | Anjou | Auto Services |
| ALPHA Meat Packers Co Ltée | Anjou | Food / Distributors, Food Wholesalers & Suppliers |
| ALTA PRÉCISION INC. | Anjou | Aerospace |
| Altair Engineering Canada | Montréal | Information Technologies (IT) |
Publicité (Desktop) Publicité (Mobile) |
| Altaï Canada | Montréal | Tout Tourisme et hôtels |
| Alten Canada Inc | Montréal | Information Technologies (IT) |
| Alto Shaam Canada | Montréal | Commercial Kitchen Equipment |
| Aluminium Distinction | Anjou | Aluminum, Aluminum Fabricators |
| Aluminum Patrice Leblanc | Anjou | Aluminum |
| 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) |
