| Arctic Traveler Canada Ltd | Garage Auto | atc.qc.ca |
| Arden Holdings Inc | Boutiques | ardene.com |
| Arena Brebeuf | Arenas, Stadiums & Athletic Fields | coopbrebeuf.com |
| Arena Caroline Ouellette | Arenas, Stadiums & Athletic Fields | www1.ville.montreal.qc.ca |
| Arena Des Canadiens Inc (L) | Calendars | — |
| Arena Garon | Arenas, Stadiums & Athletic Fields | ville.montreal.qc.ca |
| arena george-mantha | Arenas, Stadiums & Athletic Fields | ville.montreal.qc.ca |
| Arepera du Plateau | Tout Bars et restaurants | arepera.ca |
| Ares Électrique | Electricians | — |
| AREVA Renovations | Home Improvement | facebook.com |
| Argan3 | Tout Commerces au détail | argan3.com |
| Argento Frère Pavage Ltd | Landscaping | argentotrial.com |
| Argile Paduano Consultants | Landscaping | — |
| Argo En Gros | Beverage Distributors & Bottlers | facebook.com |
| ARGOLIDOS, SYLLOGOS | Blue Pages | — |
| Argus Telecom International Inc. | Tout Entreprises et services | argustel.com |
| Arhize | Arts & Crafts Stores | facebook.com |
| Ari Papas | Commercial Kitchen Equipment | facebook.com |
| Arima Conseils, Consultant en dével... | Tout Entreprises et services | arimaconseils.com |
| Arion Orchestre Baroque | Tout Arts et divertissement | arionbaroque.com |
| ARIS VELOUCHIOTIS, RESISTANCE ASSOCIATION | Blue Pages | — |
| ARISTOTELIS I | Blue Pages, Education / Career | — |
| ARISTOTELIS III | Blue Pages, Education / Career | — |
| ARISTOTELIS, PARENTS’ COMMITTEE | Blue Pages | — |
| Arius Transportation Inc | Car & Truck Transporting Companies | facebook.com |
| ARKIA Coiffure | Beauty & Fitness, Hairdressers & Beauty Salons | facebook.com |
| Arla Foods Inc | Agri-food | arlafoods.ca |
| Arlee Canada Inc | Bedding & Linens | dominionarlee.com |
| ARM Agence de Recouvrement Inc | Collection Agencies | — |
| Armada Revêtement Extérieur et Toiture | Building Contractors | msrwerbys.com |
| Armando Marquez | Computer Graphics Design & Animation | facebook.com |
| Armani Coiffure | Beauty & Fitness, Hairdressers & Beauty Salons | — |
| Armatures Dns 2000 Inc | Auto Part Manufacturers & Wholesalers | — |
| Armoires Cabitech | Cabinet Makers | — |
| Armoires Cardic Inc | Kitchen Cabinets | — |
| Armoires de Cuisine Bélanger et Fils Inc | Kitchen Cabinets | facebook.com |
| Armoires Dupuis Senecal Kitchens Cabinets | Kitchen Cabinets | — |
| Armoires Et Renovation | Home Improvement | — |
| Armoires Nouveaux Visages | Kitchen Cabinets | — |
| Armoires Nu-Trend | Furniture Stores | — |
| Armonia Médico Esthétique | Health Services | — |
| Armstars Transports | Car & Truck Transporting Companies | — |
| Armstrong World | Flooring | armstrong.com |
| ARMSTRONG-RIDEAU Salon Funéraire | Cemeteries, Services | funerairearmstrong.ca |
| Armutlu & Arapyan | Accountants, Accounting Services, Bookkeeping | armutlu.ca |
| ARO Inc Recouvrement Ogilvie | Collection Agencies | aro.ca |
| Aro InterNational Coopéraction | Camps | arocoopintl.org |
| Aroma Montreal | Aromatherapy | facebook.com |
| Aroma Montréal | Aromatherapy | aromamontreal.com |
| Aromathicare | Aromatherapy | aromathicare.com |
