| ALUBOX (DIVISION DE JE LORTIE COMPAGNIE LTÉE) | Montréal | Aerospace |
| Always B Clean | Lachine | Home Improvement |
| AMD Ritmed Inc. | Québec | Life Sciences and Health Technologies (LSHT) |
| AMESYS | Montréal | Aerospace |
| AMJ Campbell Van Lines | Lachine | Tout Entreprises et services |
| AMPHENOL AIR LB NORTH AMERICA INC. | Saint-Hubert | Aerospace |
| AMRIKART R.C. INC. | Boucherville | Aerospace |
| Andrew & Friends - 90 Day Challenge | Lachine | Beauty Salon Equipment & Supplies |
| Anixia | Lachine | Calendars |
| Annie Cyr Conseillère Indépendante Scentsy | Lachine | Aromatherapy |
Publicité (Desktop) Publicité (Mobile) |
| AP&C Revêtements et Poudres Avancées | Montréal | Aerospace |
| AP&C Revêtements et Poudres Avancées | Montréal | Aerospace |
| Applied Electronics Limited | Montréal | Audiovisual Equipment & Supplies |
| Applied Electronics Ltd. | Ville-Émard Et Côte-Saint-Paul | Tout Entreprises et services |
| AQUACOUPE TECHNOLOGY INC. | Mirabel | Aerospace |
| ARCHIVES IRON MOUNTAIN | Lachine | Information Technologies (IT) |
| Arena Pizzeria | Lachine | Pizza & Pizzerias |
| Arena Tasty Pizzeria Lachine Restaurant | Lachine | Pizza & Pizzerias |
| Arrondissement de Lachine | Montréal | Tout Informations générales |
| Arrondissement de Lachine | Lachine | Not Profit, library |
Publicité (Desktop) Publicité (Mobile) |
| Arrow Electronics | Dorval | Tout Entreprises et services |
| Art Forge | Lachine | Art Foundries |
| ARTEC TECHNOLOGIES | Montréal | Aerospace |
| Ashley's Little Gift Shop | Lachine | Candles |
| Association des Techniciens en Sant... | Lachine | Tout Entreprises et services |
| Assurance123.ca | Lachine | Tout Entreprises et services |
| ASSYSTEM PRODUCT ENGINEERING CANADA | Montréal | Aerospace |
| ATD DESIGN SERVICES (4071468 CANADA INC.) | Sainte-Geneviève | Aerospace |
| Auto Camping | Lachine | Auto Part Manufacturers & Wholesalers |
| Auto Kool | Lachine | Auto Part Manufacturers & Wholesalers |
Publicité (Desktop) Publicité (Mobile) |
| Auto Shaltas Garage Inc | Lachine | Auto Body Shop |
| Autobus Montroyal Inc | Lachine | Chauffeur Services |
| Automaticash | Lachine | Automated Teller Manufacturers & Wholesalers |
| Autos Internationales Lachine | Lachine | Tout Commerces au détail |
| Avenant SST Inc | Lachine | Health Services |
| AVERNA TECHNOLOGIES INC. | Montréal | Aerospace |
| AVIALL CANADA LIMITED | Boisbriand | Aerospace |
| AVIANOR | Mirabel | Aerospace |
| AVIATION MBBH Inc. | Dorval | Aerospace |
| AVIATRON INC. | Montréal | Aerospace |
Publicité (Desktop) Publicité (Mobile) |
| AVIOR INTEGRATED PRODUCTS INC. (LAVAL) | Laval | Aerospace |
| AVITEC (OUTILLAGES) INC. | Montréal | Aerospace |
| AÉRO INNOVATION INC. | Saint-Mathieu-De-Beloeil | Aerospace |
| AÉRO TEKNIC INC. | Saint-Hubert | Aerospace |
| AÉRONAUTIQUE TMH CANADA INC. | Boisbriand | Aerospace |
| Aéro-Mag 2000 Inc | Lachine | Aircraft Maintenance, Service & Storage |
| Bar Le Griffon | Lachine | Brasseries |
| Bar Le Griffon | Lachine | Brasseries |
| Bardeco | Lachine | Tout Bars et restaurants |
| Bariatrix Nutrition | Lachine | Tout Entreprises et services |
