| Aquabrass Inc | Montréal | Plumbing |
| Aquaduct Plumbing And Heating | Montréal | Plumbing |
| Aqualine Plumbing Montréal | Montréal | Plumbing |
| ARCHIVES IRON MOUNTAIN | Lachine | Information Technologies (IT) |
| Arena Pizzeria | Lachine | Pizza & Pizzerias |
| Arena Tasty Pizzeria Lachine Restaurant | Lachine | Pizza & Pizzerias |
| ARJ Construction | Pointe-Aux-Trembles | Plumbing |
| Armstrong Darling Inc | Anjou | Plumbing |
| Arrondissement de Lachine | Montréal | Tout Informations générales |
| Arrondissement de Lachine | Lachine | Not Profit, library |
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| Art Forge | Lachine | Art Foundries |
| Ashley's Little Gift Shop | Lachine | Candles |
| Association des Techniciens en Sant... | Lachine | Tout Entreprises et services |
| Assurance123.ca | Lachine | Tout Entreprises et services |
| Atanas Plomberie Et Chauffage | Montréal | Plumbing |
| Atanas-Plumbing & Heating | Montréal | Plumbing |
| Ateliers Mobiles Compagnie Centrale de Plomberie & Chauffage (1981) Co Ltée | Montréal | Plumbing |
| Audrey Plomberie Chauffage Inc | Montréal | Plumbing |
| Auto Camping | Lachine | Auto Part Manufacturers & Wholesalers |
| Auto Kool | Lachine | Auto Part Manufacturers & Wholesalers |
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| 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 |
| Avenir Plomberie | Montréal | Plumbing |
| Aéro-Mag 2000 Inc | Lachine | Aircraft Maintenance, Service & Storage |
| Bab | Mont-Royal | Plumbing |
| Back Flow Plumbing | Montréal | Plumbing |
| Backfloshop | Montréal | Plumbing |
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| Bar Le Griffon | Lachine | Brasseries |
| Bar Le Griffon | Lachine | Brasseries |
| Bardeco | Lachine | Tout Bars et restaurants |
| Bariatrix Nutrition | Lachine | Tout Entreprises et services |
| Barrette & Associés | Lachine | Tout Entreprises et services |
| Bastien Mario Plomberie Enr | Montréal | Plumbing |
| Bb Plumbing Supply | Mont-Royal | Plumbing |
| Bel Egoût Inc | Montréal | Plumbing |
| Belanger Upt | Montréal | Plumbing |
| Belvedere Bowling Inc | Lachine | Bowling |
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| Bertrand Durand Inc | Montréal | Plumbing |
| Best Plumbing Services | Montréal | Plumbing |
| Bicyclettes Rossi | Lachine | Tout Commerces au détail |
| Bicyclettes Rossi | Lachine | Clothing Manufacturers & Wholesalers |
| Bills Plumbing & Heating | Montréal | Plumbing |
| Bio S & T Inc. | Lachine | Life Sciences and Health Technologies (LSHT), Tout Entreprises et services |
| BIXI Montreal | Lachine | Tout Entreprises et services |
| Bk Entretien / Débouchage Et Inspection De Drain | Montréal | Plumbing |
| BMR - Quincaillerie de l'Est | Montréal | Plumbing |
| BNR plomberie Inc. | Pointe-Aux-Trembles | Plumbing |
