| Acupuncteure Certifiée Céline Hamelin | Saint-Hubert | Acupuncturists |
| Acupuncteure Claudine Dufour | Saint-Bruno | Acupuncturists |
| Acupuncture Diane Gingras | Saint-Bruno | Acupuncturists |
| Acupuncture Emmanuelle Rioux | Saint-Lambert | Acupuncturists |
| Acupuncture Emmanuelle Rioux | Saint-Lambert | Clinics |
| Acupuncture Saint-Bruno | Saint-Bruno | Acupuncturists |
| Acupuncture St-Bruno Gingras Labarre | Saint-Bruno-De-Montarville | Acupuncturists |
| Acupuncture St-Hubert | Saint-Hubert | Acupuncturists |
| Adag Consultants Inc | Montréal | Home Improvement |
| Adalia Services Préventifs Ltée | Saint-Léonard | Tout Commerces au détail |
Publicité (Desktop) Publicité (Mobile) |
| Adam Sofineti | Montréal | Tout Informatique et internet |
| Adanac Inc | Saint-Léonard | Garage Auto |
| Adapta Space | Pointe-Claire | Computer Accessories & Supplies |
| Adare Pharmatech Canada | Mont-Saint-Hilaire | Life Sciences and Health Technologies (LSHT) |
| Adele Gawhary | Saint-Hubert | Beauty & Fitness, Hairdressers & Beauty Salons |
| Adfast Corporation | Montréal | Tout Entreprises et services |
| Adhésifs Adchem Inc | Montréal | Caulking Materials & Equipment |
| ADI Electrique - Électricien Commercial et Industriel Saint-Laurent | Montréal | Electricians |
| Adicc Imagination Stratégique | Petite-Patrie | Tout Entreprises et services, Tout Informatique et internet |
| Adieu bazou | Saint-Jérôme | Tout Communautés et société, Tout Informations générales |
Publicité (Desktop) Publicité (Mobile) |
| ADP Canada Inc. | Anjou | Tout Entreprises et services |
| Adpb Réno 9318-2509 Québec Inc | Saint-Hubert | Painters |
| Adrenalys | Montréal | Startup Ecosystem |
| Adsplash Media | Mont-Royal | Communications & Public Relations Consultants |
| ADT Security Services | Saint-Léonard | Aircraft Parts, Engines & Avionics |
| Advanceit Financial Corp | Montréal | Computer Networking |
| Advanceit Financial Corp | Westmount | Computer Networking |
| Adviso Conseil | Montréal | Tout Informatique et internet |
| Ae Fournier | Sainte-Therese | ae |
| Aemarket | Montréal | Computer Repair & Cleaning |
Publicité (Desktop) Publicité (Mobile) |
| Aerial Technologies Inc. | Montréal | Life Sciences and Health Technologies (LSHT) |
| Aero NextGen | Montréal | Aviation Consultants & Services |
| Aerogram The Aerial MEDIA Aérien | Saint-Hubert | Aerial Advertising |
| Aerospace Concepts of Canada Inc | Montréal | Aviation Consultants & Services |
| Aerospace Group | Montréal | Aircraft Dealers |
| Aerospace Welding Inc | Blainville | Tout Entreprises et services, Aviation Consultants & Services |
| Aerosystems International Inc. | Montréal | Aerospace, Tout Entreprises et services |
| Aerotek | Montréal | Business Centres |
| AETERNA FUNERAL COMPLEX | Montréal | Funeral Homes, Services |
| Affacturage Canada Inc. | Dorval | Tout Entreprises et services |
Publicité (Desktop) Publicité (Mobile) |
| Affordance Studio | Montréal | Information Technologies (IT) |
| Affutage-Aiguisage Saint-Jean | Saint-Jean-Sur-Richelieu | Electricians |
| Afpec Inc. | Saint-Eustache | Tout Entreprises et services |
| African Beauty | Montréal | Beauty & Fitness, Hairdressers & Beauty Salons |
| AFSL pro | Montréal | Tout Enseignement et savoir |
| AG3 Sécurité | Pointe-Saint-Charles | Tout Entreprises et services |
| Agarathi Dance Academy | Montréal | Artists |
| AGAT Laboratoires | Montréal | Analytical & Testing Laboratories |
| AGAT Laboratories | Montréal | Analytical & Testing Laboratories |
| Agat Laboratories | Montréal | Analytical & Testing Laboratories |
