| Anton Paar Canada | Montréal | Catalogue & Online Shopping |
| Anvil International Canada | Montréal | Building Contractors |
| Aplast Canada Inc | Westmount | Home Improvement |
| AppDirect Canada Inc | Montréal | Information Technologies (IT) |
| Apple Canada Inc. | Montréal | Tout Entreprises et services, Tout Informatique et internet |
| Applications Adaptées & Solutions I... | Charlevoix | Tout Informatique et internet |
| ApSTAT Technologies | Montréal | Information Technologies (IT) |
| Aptech Services Canada Ltée | Drvl | Computer Accessories & Supplies |
| Aqua Canada Appliances | Montréal | Appliance Repair & Service |
| Aramark Canada Ltée | Lasalle | Coffee Machines & Roasting Equipment |
Publicité (Desktop) Publicité (Mobile) |
| Arbrobec Parts Canada Ltd. | Mirabel | Tout Entreprises et services |
| ARCHANGELS Greek Orthodox Comm. | Montréal | Blue Pages |
| Architech Solutions Bâtiments | Laval | Architects |
| Arctic Traveler Canada Ltd | Montréal | Garage Auto |
| Arianne Relocation Canada | Ville-Émard Et Côte-Saint-Paul | Tout Entreprises et services |
| Arlee Canada Inc | Montréal | Bedding & Linens |
| Arneg Canada Inc. | Lacolle | Tout Commerces au détail |
| Arrow Électronique Canada | Baie-D'urfé | Information Technologies (IT) |
| Arslan Automotive Canada Ltée | Pointe-Claire | Tout Commerces au détail |
| Artech Camps Canada | Montréal | Camps |
Publicité (Desktop) Publicité (Mobile) |
| Artelys Canada | Montréal | Information Technologies (IT) |
| Artemano Canada | Laval | Furniture Stores |
| Artemano Canada | Laval | Furniture Stores |
| Artisans Canada | Québec | Tout Commerces au détail |
| ASCO Valve Canada | Dorval | Tout Entreprises et services |
| ASG Canada | Montréal | Information Technologies (IT) |
| ASI Computer Technologies (Canada) Corp | Montréal | Information Technologies (IT) |
| Asplundh Canada | Terrebonne | Life Sciences and Health Technologies (LSHT) |
| Assima Canada / Wizart Canada | Montréal | Information Technologies (IT) |
| Association des scouts du Canada | Villeray | Tout Arts et divertissement, Tout Communautés et société |
Publicité (Desktop) Publicité (Mobile) |
| Association Sociale Inca Canada | Montréal | Associations |
| ASSYSTEM PRODUCT ENGINEERING CANADA | Montréal | Aerospace |
| AST Clinical solutions | Laval | Life Sciences and Health Technologies (LSHT) |
| AST Clinical solutions | Albert-Einstein | Life Sciences and Health Technologies (LSHT) |
| AstraZeneca Canada | Longueuil | Life Sciences and Health Technologies (LSHT) |
| AT&T Canada | Centre-Ville | Tout Entreprises et services |
| ATD DESIGN SERVICES (4071468 CANADA INC.) | Sainte-Geneviève | Aerospace |
| Atek Canada | Montréal | Tout Informatique et internet |
| Atelier De Daria Centro Canada | Montréal | Furniture Stores |
| ATEM Canada Inc | Montréal | Information Technologies (IT) |
Publicité (Desktop) Publicité (Mobile) |
| AtGen Canada | Laval | Life Sciences and Health Technologies (LSHT) |
| Athanassios Natsikas – SOLUTIONS COMPTABLE MTL, | Chomedey | Professionals |
| Atlas Copco Compressors Canada | Dollard Des Ormeaux | Life Sciences and Health Technologies (LSHT), Compressors |
| Aust & Hachmann (Canada) Ltd | Pointe-Claire | Agri-food |
| Auticonsult Canada | Étage | Information Technologies (IT) |
| Auto Diesel 119483 Canada Inc | Laval | Auto Part Manufacturers & Wholesalers |
| Auto Hall Canada | Montréal | Car Repair |
| Auto Hall Canada Pie IX Inc | Montréal | Automobiles, car Dealers |
| Auto Laser Canada | Montréal | Automobiles, car Dealers |
| Auto Rental Canada | Montréal | Auto Services |
