| 1230 Électroniques | Lachine | Computer Repair & Cleaning |
| 123inkcartridges.ca | Lachine | Camera & Photo Equipment Stores |
| 211 Grand Montréal | Montréal | Tout Informations générales |
| 9132-1000 Québec Inc | Lachine | Business & Trade Organizations |
| 9265-6792 Québec Inc | Saint-Léonard | Baked Goods Wholesalers |
| 9265-6792 Québec Inc | Montréal | Baked Goods Wholesalers |
| 9334-4349 Quebec Inc | Lachine | Pizza & Pizzerias |
| A Asselin & Fils Inc | Lachine | Plumbing |
| A La Petite Campagne Traiteur Inc | Laval | Buffets |
| A Pex Discount Inc | Lachine | Bedding & Linens |
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| Aai Encanteurs Assoc Intl | Lachine | Auctions |
| Abu-Lasia/ Matamin | Lachine | Baked Goods Wholesalers |
| Accessoires Rose Blanche | Lachine | Bakery Equipment, Bakery Supplies |
| Accord Expositions | Lachine | Tout Entreprises et services |
| Accès Golf | Quartier Latin Et Centre-Sud | Tout Arts et divertissement |
| Acef du Nord de Montréal | Villeray | Tout Communautés et société |
| Acier Lachine Inc | Lachine | Aluminum |
| Action 500 | Dorval | Tout Arts et divertissement |
| Acupuncteur Qi Gong Montréal | Montréal | Acupuncturists |
| Acupuncture Chinoise & Japonaise Goli Homaei Haddad | Montréal | Alternative Health |
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| Acupuncture Dannie Goulet | Montréal | Acupuncturists, Alternative Health |
| Adam Leith Gollner | Montréal | Tout Arts et divertissement |
| Adams Viennese Bakery | Montréal | Baked Goods Wholesalers |
| ADI Global Distribution | Lachine | Tout Entreprises et services |
| ADM Canada | Lachine | Tout Entreprises et services |
| Aegera Therapeutics, part of Pharmascience Inc. | Île-des-Soeurs | Life Sciences and Health Technologies (LSHT) |
| Affaires Goûter | Montréal | Caterers |
| Affiliated Sport Group | Lachine | Tout Entreprises et services |
| Agence Goodwin | Montréal | Tout Entreprises et services |
| Agence Imapro Inc | Lachine | Business & Trade Organizations |
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| Agent Gourmand | Montréal | Caterers |
| AIDA Distribution | Lachine | Beverage Distributors & Bottlers |
| Air Pro Transport 2009 | Lachine | Air Cargo Service |
| Alain Normandin Rénovation | Lachine | Home Improvement |
| Aliments Morehouse Canada Inc | Lachine | Agri-food |
| Aliments T & N (Les) | Lachine | Agri-food |
| Allstream | Lachine | Information Technologies (IT), Tout Entreprises et services, Tout Informatique et internet |
| Alongi | Lachine | Tout Commerces au détail, Tout Entreprises et services |
| Always B Clean | Lachine | Home Improvement |
| AMD Ritmed Inc. | Québec | Life Sciences and Health Technologies (LSHT) |
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| AmerisourceBergen Canada Corporation | Montréal | Life Sciences and Health Technologies (LSHT) |
| AMJ Campbell Van Lines | Lachine | Tout Entreprises et services |
| Aménagement Gopelouse | Longueuil | Landscaping |
| Aménagement GoPelouse | Longueuil | Landscaping |
| Andrew & Friends - 90 Day Challenge | Lachine | Beauty Salon Equipment & Supplies |
| Animation Gonflable | Longueuil | Computer Graphics Design & Animation |
| Anixia | Lachine | Calendars |
| Anna Goodson Illustration Agency | Ndg | Tout Entreprises et services |
| Annie Cyr Conseillère Indépendante Scentsy | Lachine | Aromatherapy |
| Annie Go | Victoriaville | go |
