| Amariam | Massage Therapy | amariam.com |
| Amarie-Josée Rompré Photographe | Tout Commerces au détail | amariephotographe.blogspot.com |
| Amaris Conseil Inc | Information Technologies (IT) | amaris.com |
| Amazing Race Montreal | Tout Tourisme et hôtels | amazingracemontreal.com |
| Amb Ménage Inc. | Cleaning Services, Cleaning Service | ambmenage.ca |
| Ambayec Rosario Dr | Dentists | — |
| Amber Studio | Information Technologies (IT) | — |
| Ambiance et Discernement Antiquités | Antique Dealers | facebook.com |
| Ambigu | Art Galleries, Dealers & Consultants | ambigu.ca |
| Ambrosia Santé | Aromatherapy | ambrosia-sante.com |
| Amc Canada | Airlines | facebook.com |
| AMC Innovations | Computer Cabling, Installation & Service | — |
| AMD Medicom Inc. | Life Sciences and Health Technologies (LSHT) | amdritmed.com |
| Amdocs Gestion de Services Canadiens | Information Technologies (IT) | amdocs.com |
| Ame-Art Artistes Du Mille-End (L') | Art Galleries, Dealers & Consultants | ame-art.com |
| Amed Grand Medium Voyant | Astrologers & Psychics | mediumgaby.com |
| Amelie Sutter Artiste Peintre | Artists | ameliesutter.com |
| Amenagement | Landscaping | — |
| Amenagement Denis Bernier | Landscaping | — |
| Amenagement paysager prestegui | Landscaping | amenagementpaysagerprestegui.ca |
| Amenagement Zamco Inc | Landscaping | amenagementzamco.com |
| AmenagementPaysager.ca | Tout Entreprises et services | amenagementpaysager.ca |
| Amerella du Canada Ltée | Tout Entreprises et services | jcorp.ca |
| Ameresco Canada Inc | Life Sciences and Health Technologies (LSHT) | ameresco.com |
| American Apparel | Boutiques | store.americanapparel.ca |
| American Iron & Metal Co. Inc. | Tout Entreprises et services | aim-global.com |
| American Transaction Elect Inc | Electricians | — |
| American Women's Club of Montreal | Tout Communautés et société | awcmontreal.com |
| AmerisourceBergen Canada Corporation | Life Sciences and Health Technologies (LSHT) | amerisourcebergen.ca |
| AMESYS | Aerospace | amesys.fr |
| Ameublement Bon Coup | Furniture Stores | — |
| Ameublement de Lorimier | Tout Commerces au détail | electrosdelorimier.com |
| Ameublement De Lorimier Enr | Appliance Repair | — |
| Ameublement Delorimier | Appliance Repair | electrosdelorimier.com |
| Ameublement Laurier | Appliance Repair & Service | facebook.com |
| Ameublement Rembourratout Du Québec Inc | Kitchen Cabinets | facebook.com |
| AMG Auto-Mécanique | Auto Repair Garages, Not Profit, Car Repair | amgautomecanique.com |
| Amiante National Asbestos | Asbestos Testing & Consultants | amiantenational.com |
| Amiens Salle de Reception | Auditoriums & Halls | — |
| Amigo Auto | Garage Auto | facebook.com |
| Amik Ébénisterie | Home Improvement | — |
| Amimoc | Tout Commerces au détail | amimoc.ca |
| Amir Assurances | Car Insurance | amirassurances.agentsassurances.com |
| Amir Fer | Bridal Shops | amifer.ca |
| Amira Auto | Automobiles, car Dealers | — |
| AMIRALI, EVANGELIA | Blue Pages | — |
| Amirco Electrique | Electricians | amircoelectrique.com |
| Amircoelectrique | Electricians | facebook.com |
| AMIS DE LA NOUVELLE DEMOCRATIE, ASSOCIATION | Blue Pages | — |
| Amis du boulevard Saint-Laurent | Tout Informations générales | amisboulevardstlaurent.com |
