| 10|20 Marketing | Dorval | Button Advertising |
| 1982 Transportation | Dorval | Car & Truck Transporting Companies |
| 24k Auto Inc | Dorval | Auto Body Shop |
| 2G Solutions | Montréal | Tout Informatique et internet |
| 9141-2148 Québec Inc | Westmount | Cleaning Services, Cleaning Service |
| 99andbeyond (anciennement Solutions CognitiveChem inc.) | Dépatie | Life Sciences and Health Technologies (LSHT) |
| A + Solutions Home Healthcare Inc | Montréal | Care Homes |
| A P S Aviation Inc | Dorval | Aviation Consultants & Services |
| A V Solutions | Montréal | Audiovisual Equipment & Supplies, Audiovisual Equipment & Supplies Rental |
| AB auto | Dorval | Auto Body Shop |
Publicité (Desktop) Publicité (Mobile) |
| ABF Systèmes Inc. | Boucherville | Tout Entreprises et services |
| Abilis Solutions | Centre-Ville | Tout Informatique et internet |
| Abilis Solutions | Montréal | Information Technologies (IT) |
| ABP Consultants en personnel | Westmount | Tout Entreprises et services |
| Abrasicorp & Equipment | Dorval | Abrasives |
| Abrasive Technology N A Inc | Dorval | Abrasives, Tout Entreprises et services |
| ABZ Assurances-Insurance | Westmount | Car Insurance |
| ACA | Westmount | Collection Agencies |
| Académie Ballet Flamenco Lina Moros | Westmount | Tout Enseignement et savoir |
| ACCEO Solutions | Montréal | Information Technologies (IT), Tout Informatique et internet |
Publicité (Desktop) Publicité (Mobile) |
| ACCEO Solutions | Montréal | Computer Consultants |
| ACCEO Solutions Inc. | Montréal | Tout Informatique et internet |
| Accounting and Tax Solutions | Montréal | Bookkeeping Software & Accounting Systems |
| Accès pharma chez Walmart | Dorval | Pharmacy |
| Acier Vanguard Ltée | Dorval | Tout Entreprises et services |
| Acier Wirth Steel | Westmount | Aluminum |
| Action 500 | Dorval | Tout Arts et divertissement |
| Action Sport Physio | Westmount | Tout Entreprises et services, Physiotherapy |
| Actweb Solutions | Petite-Patrie | Tout Commerces au détail, Tout Entreprises et services |
| Adelman, Adam | Westmount | Boutiques |
Publicité (Desktop) Publicité (Mobile) |
| Advanceit Financial Corp | Westmount | Computer Networking |
| ADVANTECH INC. | Dorval | Aerospace |
| Aeroneuf Instruments Ltée | Dorval | Aerospace, Aircraft Parts, Engines & Avionics |
| AEROPORT DORVAL/MIRABEL | Dorval | Blue Pages |
| Aerospatiale Kaycee | Dorval | Aircraft Parts, Engines & Avionics |
| Affacturage Canada Inc. | Dorval | Tout Entreprises et services |
| Affichage Solutions | Vaudreuil-Dorion | Tout Entreprises et services |
| Air Algerie | Dorval | Airline Ticket Agencies |
| Air Inuit (1985) Ltd | Dorval | Airlines |
| Air Inuit Ltd | Dorval | Airlines |
Publicité (Desktop) Publicité (Mobile) |
| Air Inuit Ltd | Dorval | Airlines |
| Air Inuit Ltée | Dorval | Airlines |
| Air-Therm Inc | Westmount | Plumbing |
| AIRCRAFT EQUIPMENT & SUPPORT SERVICES | Dorval | Aerospace |
| Airline Network Services | Dorval | Airlines |
| Airline Services International Inc | Dorval | Airlines |
| AIRNAV ELECTRONIC | Dorval | Aerospace |
| Airnav Électronique Ltée | Dorval | Tout Entreprises et services |
| Airtrades Transitaires | Dorval | Tout Entreprises et services |
| Alarme Sentinelle | Dorval | Tout Entreprises et services |
