| 1230 Électroniques | Lachine | Computer Repair & Cleaning |
| 123inkcartridges.ca | Lachine | Camera & Photo Equipment Stores |
| 2760-0352 Quebec Inc | Outremont | Cakes |
| 900 Rockland | Outremont | Apartments |
| 9132-1000 Québec Inc | Lachine | Business & Trade Organizations |
| 9334-4349 Quebec Inc | Lachine | Pizza & Pizzerias |
| A Asselin & Fils Inc | Lachine | Plumbing |
| A Pex Discount Inc | Lachine | Bedding & Linens |
| Aai Encanteurs Assoc Intl | Lachine | Auctions |
| Abbas Sabet | Montréal | Chartered Professional Accountants (CPA) |
Publicité (Desktop) Publicité (Mobile) |
| Abu-Lasia/ Matamin | Lachine | Baked Goods Wholesalers |
| Acces Physio Collège Charles-Lemoyne | Delson | Physiotherapy |
| Accessoires Rose Blanche | Lachine | Bakery Equipment, Bakery Supplies |
| Accord Expositions | Lachine | Tout Entreprises et services |
| Acier Lachine Inc | Lachine | Aluminum |
| Acimovic m | Outremont | Apartments |
| Acpak Sacs | Montréal | Chartered Professional Accountants (CPA) |
| Acupuncteure Certifiée Pascale Tremblay | Delson | Acupuncturists |
| ADI Global Distribution | Lachine | Tout Entreprises et services |
| Adl Esthétique Automobile | Delson | Car Detailing |
Publicité (Desktop) Publicité (Mobile) |
| ADM Canada | Lachine | Tout Entreprises et services |
| Affiliated Sport Group | Lachine | Tout Entreprises et services |
| Agence Imapro Inc | Lachine | Business & Trade Organizations |
| Ai-Tuyet Luong-Si | Outremont | si |
| AIDA Distribution | Lachine | Beverage Distributors & Bottlers |
| Aiguisatek | Delson | Tout Entreprises et services |
| Air Pro Transport 2009 | Lachine | Air Cargo Service |
| Alain Normandin Rénovation | Lachine | Home Improvement |
| Alevras Andreas CPA | Laval | Accountants, Accounting Services, Professionals |
| Aliments Morehouse Canada Inc | Lachine | Agri-food |
Publicité (Desktop) Publicité (Mobile) |
| Aliments T & N (Les) | Lachine | Agri-food |
| Alipro-Mistral Ingrédients Inc | Delson | 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) |
| Amesos Plumbing | Outremont | Plumbing |
| AMJ Campbell Van Lines | Lachine | Tout Entreprises et services |
| Amour des thés | Outremont | Tout Commerces au détail |
| Amselem Dan CGA | Montréal | Chartered Professional Accountants (CPA) |
Publicité (Desktop) Publicité (Mobile) |
| Aménagement Denis & Fils Inc | Outremont | Landscaping |
| Andrew & Friends - 90 Day Challenge | Lachine | Beauty Salon Equipment & Supplies |
| Anixia | Lachine | Calendars |
| Annie Cyr Conseillère Indépendante Scentsy | Lachine | Aromatherapy |
| Apex Performance | Delson | Fitness Gyms |
| Aquarium ASP Inc | Outremont | Aquariums & Supplies |
| Arbitrage JLH SA | Outremont | Arbitration Service |
| Arbutus Records | Outremont | Tout Entreprises et services |
| ARCHIVES IRON MOUNTAIN | Lachine | Information Technologies (IT) |
| Arena Pizzeria | Lachine | Pizza & Pizzerias |
