| Aegon Dealer Services Inc - Eastern Office | Automobiles, car Dealers, Car Dealers | — |
| Aemarket | Computer Repair & Cleaning | amgenies.com |
| Aequivalens Clinical Research | Life Sciences and Health Technologies (LSHT) | arthrolab.com |
| aerial | Information Technologies (IT) | aerial.ai |
| Aerial Technologies Inc. | Life Sciences and Health Technologies (LSHT) | aerial.ai |
| Aero NextGen | Aviation Consultants & Services | aero-nextgen.com |
| Aerolineas Argentinas | Airlines | — |
| Aerospace Concepts of Canada Inc | Aviation Consultants & Services | aerospaceconcepts.com |
| Aerospace Development Corp | Aircraft & Private Jet Charter | facebook.com |
| Aerospace Group | Aircraft Dealers | facebook.com |
| Aerosystems International Inc. | Aerospace, Tout Entreprises et services | asiiweb.com |
| Aerotechnick Inc | Aircraft Parts, Engines & Avionics | — |
| Aerotek | Business Centres | facebook.com |
| Aerus | Air Purifiers | aerusofwestmount.com |
| AETERNA FUNERAL COMPLEX | Funeral Homes, Services | complexaeterna.com |
| AEV Rendering | Architectural Drawing | facebook.com |
| AF Electrique | Electricians | facebook.com |
| AF Rénovations Toiture | Home Improvement | — |
| Affaires Goûter | Caterers | affairesgouter.ca |
| AFFAIRES MUNICIPALES | Blue Pages | — |
| Affiche en tête | Tout Commerces au détail | afficheentete.ca |
| Affordance | Information Technologies (IT) | affordancestudio.com |
| Affordance Studio | Information Technologies (IT) | affordancestudio.com |
| Afoussi Amal Make Up Artist | Artists | — |
| Afr Inspection Prévention | Plumbing | facebook.com |
| Africa Teint De Rêve | Beauty & Fitness, Hairdressers & Beauty Salons | facebook.com |
| African Beauty | Beauty & Fitness, Hairdressers & Beauty Salons | facebook.com |
| African Cycy | Black Hair Salons | facebook.com |
| Africana Tresses Et Gref | Black Hair Salons | africanatresses.com |
| Afrik Élégance | Beauty & Fitness, Hairdressers & Beauty Salons | — |
| Afrikya Tresses | Beauty & Fitness, Hairdressers & Beauty Salons | facebook.com |
| Afrodeal | Advertising Agencies | facebook.com |
| Afroditi | Tout Commerces au détail | afroditi.ca |
| AFS Technologies Inc | Information Technologies (IT) | afsi.com |
| AFSL pro | Tout Enseignement et savoir | afslpro.com |
| After Hours Cleaners | Cleaning Services, Cleaning Service | afterhourscleaners.ca |
| AG Distribution | Auto Body Shop | — |
| Ag Ga | ag | — |
| Agaram | Community Service & Charitable Organizations | agaramarts.com |
| Agarathi Dance Academy | Artists | facebook.com |
| AGAT Laboratoires | Analytical & Testing Laboratories | — |
| AGAT Laboratories | Analytical & Testing Laboratories | — |
| Agat Laboratories | Analytical & Testing Laboratories | agatlabs.com |
| Agathe Jeanniot Ostéopathe | Alternative Health | agatheosteopathie.wordpress.com |
| Age | Electricians | — |
| Age d'Or Sts Martyrs Canadiens | Associations | — |
| Ageless Pharmacy | Pharmacy | — |
| Agence Amical Demenagement | Building & House Movers | facebook.com |
| Agence Braque | Tout Entreprises et services | braque.ca |
| Agence Candy Land Montreal | Candy & Confectionery Stores | — |
