| Albert Seliger | Montréal | Business Insurance |
| ALCiE Integrated Business Solutions | Montréal | Tout Informatique et internet |
| Alcoa innovation | Montréal | Clean Technologies |
| Aleco | Saint-Léonard | Building Contractors |
| Alexandre Germain | Longueuil | Business Lawyers |
| Aliments Dole Canada | Laval | Agri-food |
| Aliments McCain | Montréal | Agri-food |
| Allali Brault | Montréal | Business Lawyers |
| Alliance Web-Commerce | Montréal | Business & Trade Organizations |
| AlloFirm | Montréal | Business Brokers |
Publicité (Desktop) Publicité (Mobile) |
| Alstom Transport Information Solutions | Montréal | Information Technologies (IT) |
| Altapex Construction | Montréal | Building Contractors |
| Alten Canada Inc | Montréal | Information Technologies (IT) |
| Alto Design | Montréal | Clean Technologies, Tout Entreprises et services |
| Aluminium J P M Inc | Montréal | Building Contractors |
| Amaris Conseil Inc | Montréal | Information Technologies (IT) |
| Amaro Magasin St-Léonard | Saint-Léonard | Bulk & Bottled Water |
| Ameresco Canada Inc | Montréal | Life Sciences and Health Technologies (LSHT) |
| AMESYS | Montréal | Aerospace |
| Ameublements De Bureau Intrtch | Dorval | Furniture Stores |
Publicité (Desktop) Publicité (Mobile) |
| Amicom Inc | Longueuil | Business Centres |
| AMS Design Inc | Mont St Grégoire | Building Repair & Restoration |
| Anatol Spices Regd | Montréal | Bulk Foods |
| Andre Poulin | Longueuil | Building Contractors |
| Angany | Montréal | Life Sciences and Health Technologies (LSHT) |
| Angel Travel | Montréal | Bus & Coach Rental & Charter |
| Anticafe Montreal | Centre-Ville | Tout Bars et restaurants, Tout Entreprises et services |
| Anvil International Canada | Montréal | Building Contractors |
| APCHQ Montréal métropolitain | Anjou | Tout Entreprises et services |
| APCHQ Montréal Métropolitain | Montréal | Building Contractors |
Publicité (Desktop) Publicité (Mobile) |
| APL Construction | Boucherville | Building Contractors |
| Aptilon | Montréal | Business & Trade Organizations |
| Aquatech BM | Boucherville | Business & Trade Organizations |
| Aquatech, Societé de gestion de l'eau | Montréal | Life Sciences and Health Technologies (LSHT) |
| AquaTerra - Labrador | Anjou | Bulk & Bottled Water |
| Arachides Dépôt et Plus | Chambly | Bulk Foods |
| Arboreta Internet Services | Longueuil | Business Centres |
| Archivex | Montréal | Business Centres |
| Aresx | Saint-Bruno | Business Brokers |
| Arishma D. Gokhool Attorney | Toronto | Business Lawyers |
Publicité (Desktop) Publicité (Mobile) |
| Armada Revêtement Extérieur et Toiture | Montréal | Building Contractors |
| Art Deco Buildings: Montreal | Montréal | Tout Arts et divertissement |
| Art Deco Montreal | Centre-Ville | Tout Arts et divertissement |
| Art Spécialisée En Construction Inc. | Côte Saint-Luc | Building Contractors |
| Artelite | Anjou | Tout Commerces au détail |
| Artelys Canada | Montréal | Information Technologies (IT) |
| Arthur Malouin Ltée | Saint-Césaire | Business Insurance |
| Artopex | Laval | Tout Commerces au détail |
| As du Lavage à Pression | Montréal | Building Exterior Cleaning |
| Assetco Recovery Services Inc | Mont-Royal | Business Valuation |
