| Automobiles J L P Enr | Tout Commerces au détail, Car Repair | autojlp.com |
| Automobiles J P D Inc/Carrossier Procolor Rosemont/Le Spécialiste | Garage Auto | carrossier-procolor.com |
| Automobiles Popular Inc. | Automobiles, Car Dealers | popularvw.com |
| AutoMobility | Tout Commerces au détail | automob.ca |
| Automotion Collision Center | Car Repair | automotioncollision.com |
| Automotive Detailing | Car Detailing | facebook.com |
| Automtl | Auto Body Shop | — |
| Autoplateau Location | Car Rental | autoplateau.com |
| Autoplex Americain Importé | Auto Services | autoplex26.com |
| Autorité régionale de transport métropolitain | Clean Technologies | artm.quebec |
| Autos Coloris | Auto Body Shop Equipment & Supplies | — |
| Autoselect MAV | Auto Repair Garages | autoselectmav.com |
| Autoselect Mav | Car Repair | — |
| Autoultimax | Automobiles, car Dealers, Car Dealers | — |
| Autour D'Un Pain | Bakeries | facebook.com |
| Autour de la flûte | Tout Arts et divertissement | autourdelaflute.com |
| Auvent Gms | Awning & Canopy Sales & Service | — |
| Auvents De Venise | Awning & Canopy Sales & Service | auventsdevenise.net |
| Auvents De Venise | Awning & Canopy Sales & Service | — |
| Auvents G M S | Awning & Canopy Sales & Service | auventsgms.com |
| Auvents Masson Inc | Awning & Canopy Sales & Service | auventsmasson.com |
| Aux 33 tours | Tout Commerces au détail | aux33tours.com |
| Aux Parquets Lépine Inc | Flooring | parquetlepine.com |
| Aux Petites Indulgences | Beauty & Fitness, Hairdressers & Beauty Salons | — |
| Aux Petits Soins Dentaires | Dentists | apsd.ca |
| Aux Quatre Vents | Beauty & Fitness, Hairdressers & Beauty Salons | — |
| Aux Services d'Entretien Simplicité | Cleaning Services, Cleaning Service | auxservicesdentretiensimplicite.com |
| Aux Toitures Gerry Inc | Roofing | — |
| Aux Vivres | Tout Bars et restaurants | auxvivres.com |
| Auxvraiesvaleurs | Beds | — |
| AV Derma Esthétique | Beauty & Fitness, Hairdressers & Beauty Salons | facebook.com |
| Av Matos | av | — |
| AV Select | Electricians | — |
| Avalon Acturial | Actuary Consulting & Services | avalon.ca |
| Avalon Partners | Tout Entreprises et services | avalonpartners.ca |
| Avanade | Information Technologies (IT) | avanade.com |
| Avant Garde Solutions | Information Technologies (IT) | avantgardesolutions.net |
| Avant Premiere | Arts & Cultural Organizations & Centres | avant-premiere.ca |
| Avant-Garde Automation Inc | Automation Consultants | avgam.com |
| Avant-Garde Électrique Inc | Electricians | avantgarde-electrique.com |
| Avantage Certifié En Assurances | Car Insurance | aceassurance.com |
| Avantage Plus Inc | Painters | avantage-plus.com |
| Avantages Couvreur Inc | Roofing | — |
| Avaya Canada Corp | Information Technologies (IT) | avaya.ca |
| AVCS | Audiovisual Production Services | — |
| Aveda Salon Spa & Academie | Health and Beauty | — |
| Aveda Salon Spa Academie | Beauty & Fitness, Hairdressers & Beauty Salons | — |
| Avenir Plomberie | Plumbing | plomberieavenir.com |
| Avensys | Information Technologies (IT) | 3spgroup.com |
| Aventure Mille-Îles | Canoe Trip Outfitters | facebook.com |
