| 10|20 Marketing | Dorval | Button Advertising |
| 1982 Transportation | Dorval | Car & Truck Transporting Companies |
| 24k Auto Inc | Dorval | Auto Body Shop |
| 9269-9826 Quebec Inc | L'île-Perrôt | Beauty & Fitness, Hairdressers & Beauty Salons |
| A la carte Marketing | Île-Bizard | Tout Entreprises et services |
| A P S Aviation Inc | Dorval | Aviation Consultants & Services |
| A&A Car Detailing | L'île-Bizard | Car Washes |
| AB auto | Dorval | Auto Body Shop |
| Abrasicorp & Equipment | Dorval | Abrasives |
| Abrasive Technology N A Inc | Dorval | Abrasives, Tout Entreprises et services |
Publicité (Desktop) Publicité (Mobile) |
| Acadia | Montréal | Computer & Technology Assistance Programs |
| Acadia | Montréal | Computer & Technology Assistance Programs |
| Accenture | Montréal | Information Technologies (IT) |
| ACCEO Solutions | Montréal | Information Technologies (IT), Tout Informatique et internet |
| Acces Physio Collège Charles-Lemoyne | Delson | Physiotherapy |
| Accès pharma chez Walmart | Dorval | Pharmacy |
| Acef de l'Île Jésus | Vimont Et Auteuil | Tout Communautés et société |
| Acier Vanguard Ltée | Dorval | Tout Entreprises et services |
| Action 500 | Dorval | Tout Arts et divertissement |
| Acupuncteure Certifiée Pascale Tremblay | Delson | Acupuncturists |
Publicité (Desktop) Publicité (Mobile) |
| Adl Esthétique Automobile | Delson | Car Detailing |
| ADP Canada R-L | Montréal | Information Technologies (IT) |
| Advanceit Financial Corp | Montréal | Computer Networking |
| Advanceit Financial Corp | Westmount | Computer Networking |
| ADVANTECH INC. | Dorval | Aerospace |
| Aegera Therapeutics, part of Pharmascience Inc. | Île-des-Soeurs | Life Sciences and Health Technologies (LSHT) |
| 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 |
Publicité (Desktop) Publicité (Mobile) |
| Agence Immobilière Bauhaus | Gaspésie-Îles-De-La-Madeleine | Tout Entreprises et services |
| Aiguisatek | Delson | Tout Entreprises et services |
| Air Algerie | Dorval | Airline Ticket Agencies |
| Air Inuit (1985) Ltd | Dorval | Airlines |
| Air Inuit Ltd | Dorval | Airlines |
| Air Inuit Ltd | Dorval | Airlines |
| Air Inuit Ltée | Dorval | Airlines |
| AIR RESEARCH TECHNOLOGY INC. | Montréal | Aerospace |
| AIRCRAFT EQUIPMENT & SUPPORT SERVICES | Dorval | Aerospace |
| Airline Network Services | Dorval | Airlines |
Publicité (Desktop) Publicité (Mobile) |
| 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 |
| Alipro-Mistral Ingrédients Inc | Delson | Agri-food |
| Alliages Unifiés | Dorval | Tout Entreprises et services |
| Alliance Service d'Entretien Ménager | Saint-Paul-De-L'île-Aux-Noix | Cleaning Services, Cleaning Service |
| Allied Universal Security Services | Dorval | Tout Entreprises et services |
| Alta Material Handling | Dorval | Tout Entreprises et services |
