| Always B Clean | Lachine | Home Improvement |
| AMC Innovations | Montréal | Computer Cabling, Installation & Service |
| AMD Ritmed Inc. | Québec | Life Sciences and Health Technologies (LSHT) |
| AMJ Campbell Van Lines | Lachine | Tout Entreprises et services |
| Andrew & Friends - 90 Day Challenge | Lachine | Beauty Salon Equipment & Supplies |
| André Ink | Laval | Computer Accessories & Supplies |
| Animatia | Montréal | Computer Graphics Design & Animation |
| Animation Gonflable | Longueuil | Computer Graphics Design & Animation |
| Anixia | Lachine | Calendars |
| Annie Cyr Conseillère Indépendante Scentsy | Lachine | Aromatherapy |
Publicité (Desktop) Publicité (Mobile) |
| Apiron Information Solution | Cote Saint-Luc | Computer Consultants |
| Appnovation | Montréal | Computer Consultants |
| Après-Coup | Greenfield Park | Associations |
| Aptech Services Canada Ltée | Drvl | Computer Accessories & Supplies |
| APY MTL | Montréal | Computer Graphics Design & Animation |
| AQPEHV | Greenfield Park | Tout Communautés et société |
| Aqua-Jet | Greenfield Park | Chemical & Pressure Cleaning Systems |
| Aquarium Arc En Ciel | Greenfield Park | Aquariums & Supplies |
| Aquaxpert Inc | Greenfield Park | Air Conditioning Contractors |
| Archi-Art Design | Greenfield Park | Painters |
Publicité (Desktop) Publicité (Mobile) |
| Archimed Studio | Laval | Computer Graphics Design & Animation |
| ARCHIVES IRON MOUNTAIN | Lachine | Information Technologies (IT) |
| Arena Pizzeria | Lachine | Pizza & Pizzerias |
| Arena Tasty Pizzeria Lachine Restaurant | Lachine | Pizza & Pizzerias |
| Armando Marquez | Montréal | Computer Graphics Design & Animation |
| Armoires De Cuisine Et Comptoirs Lasalle | Greenfield Park | Beds |
| Arrondissement de Lachine | Montréal | Tout Informations générales |
| Arrondissement de Lachine | Lachine | Not Profit, library |
| Art Forge | Lachine | Art Foundries |
| Artisanat des Cèdres | Greenfield Park | Candles |
Publicité (Desktop) Publicité (Mobile) |
| Ashley's Little Gift Shop | Lachine | Candles |
| ASI Computer Technologies (Canada) Corp | Montréal | Information Technologies (IT) |
| Asi Corporation | Montréal | Computer Manufacturers & Wholesalers |
| Association Afaq | Greenfield Park | Associations |
| Association des Cadres Superieurs | Greenfield Park | Associations |
| Association des Techniciens en Sant... | Lachine | Tout Entreprises et services |
| Association Régionale Soccer Rive Sud Inc | Greenfield Park | Associations |
| Assurance123.ca | Lachine | Tout Entreprises et services |
| Astucemédia Inc | Montréal | Computer Graphics Design & Animation |
| Asus | Montréal | Computer & Technology Assistance Programs |
Publicité (Desktop) Publicité (Mobile) |
| Atelier De Couture Thao | Greenfield Park | Clothing Alterations |
| Atelier Du Presse-Citron | Montréal | Computer Graphics Design & Animation |
| Atelier Majieart | Greenfield Park | Art Schools |
| Atomique Multiplicité | Saint-Jérôme | Computer Repair & Cleaning |
| Atwater Library and Computer Centre | Centre-Ville | Tout Enseignement et savoir, Tout Informatique et internet |
| Au Vieux Duluth | Greenfield Park | Commercial Kitchen Equipment |
| AugureNet | Montréal | Computer Networking |
| Auto Camping | Lachine | Auto Part Manufacturers & Wholesalers |
| Auto Kool | Lachine | Auto Part Manufacturers & Wholesalers |
| Auto Shaltas Garage Inc | Lachine | Auto Body Shop |
