| Atelier De Daria Centro Canada | Montréal | Furniture Stores |
| ATEM Canada Inc | Montréal | Information Technologies (IT) |
| Atex Inc | Montréal | Business Forms & Systems |
| AtGen Canada | Laval | Life Sciences and Health Technologies (LSHT) |
| Atlas Copco Compressors Canada | Dollard Des Ormeaux | Life Sciences and Health Technologies (LSHT), Compressors |
| Atome Distributeur Inc | Brossard | Business Forms & Systems |
| Aubé Avocats | Saint-Constant | Business Lawyers |
| Aust & Hachmann (Canada) Ltd | Pointe-Claire | Agri-food |
| Auticonsult Canada | Étage | Information Technologies (IT) |
| Auto Diesel 119483 Canada Inc | Laval | Auto Part Manufacturers & Wholesalers |
Publicité (Desktop) Publicité (Mobile) |
| 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 |
| Automat Technologies | Montréal | Information Technologies (IT) |
| Automic Canada Logiciels | Montréal | Information Technologies (IT) |
| Avalon Partners | Pointe-Claire | Business Brokers |
| Avaya Canada Corp | Montréal | Information Technologies (IT) |
| Avery Dennison Fasson Canada Inc. | Vaudreuil-Dorion | Tout Entreprises et services |
| Avery Weigh-Tronix Canada | Pointe-Claire | Tout Entreprises et services |
Publicité (Desktop) Publicité (Mobile) |
| AVI-SPL Canada Ltd | Montréal | Information Technologies (IT) |
| AVIALL CANADA LIMITED | Boisbriand | Aerospace |
| Aviall Canada Ltd | Boisbriand | Aircraft Parts, Engines & Avionics |
| Avison Young Canada | Centre-Ville | Tout Entreprises et services |
| Aviva Canada | Montréal | Car Insurance |
| Avnet Canada Inc. | Montréal | Tout Entreprises et services |
| Avnet International (Canada) Ltd | Montréal | Information Technologies (IT) |
| Avocatpenda.ca | Montréal | Business Lawyers |
| Avocats Lauzon | Montréal | Business Lawyers |
| Avon Canada Inc. | Pointe-Claire | Tout Commerces au détail |
Publicité (Desktop) Publicité (Mobile) |
| Azelis canada | Boucherville | Chemicals |
| Azurverde | Verdun | Business Centres |
| AÉRONAUTIQUE TMH CANADA INC. | Boisbriand | Aerospace |
| B Couture | Montréal | Couture, COUTURE |
| Bacardi Canada Inc | Brossard | Beverage Distributors & Bottlers |
| Bacardi Canada Inc | Verdun | Beverage Distributors & Bottlers |
| Bakemark Canada Ltd | Laval | Agri-food |
| BakeMark Ingredients Canada Ltd. | Laval-Des-Rapides | Tout Entreprises et services |
| Banafrica | Montréal | Business & Trade Organizations |
| BancTec Canada | Montréal | Information Technologies (IT) |
Publicité (Desktop) Publicité (Mobile) |
| Banook NA Canada | Banting | Life Sciences and Health Technologies (LSHT) |
| Banque de développement du Canada -... | Centre-Ville | Tout Entreprises et services |
| Banque Laurentienne du Canada | Montréal | Tout Entreprises et services |
| Banque Royale du Canada | Montréal | Tout Entreprises et services |
| Banque UBS (CANADA) | Centre-Ville | Tout Entreprises et services |
| Baron Abrams | Westmount | Business Lawyers |
| Barreau De Longueuil | Longueuil | Business Lawyers |
| Barreau du Québec | Montréal | Tout Entreprises et services, Business & Trade Organizations |
| Barry Callebaut Canada Inc. | Saint-Hyacinthe | Tout Entreprises et services |
| Barza Bronfen | Montréal | Business Lawyers |
