| Airbnb | Montréal | Information Technologies (IT) |
| AIRCRAFT EQUIPMENT & SUPPORT SERVICES | Dorval | Aerospace |
| Airex Industries | Laval | Life Sciences and Health Technologies (LSHT), Tout Entreprises et services, Air Conditioning Contractors |
| Airex Énergie | Laval | Life Sciences and Health Technologies (LSHT) |
| AIRNAV ELECTRONIC | Dorval | Aerospace |
| Airy3D | Montréal | Information Technologies (IT) |
| AkioSoft | Ouest | Life Sciences and Health Technologies (LSHT) |
| AKKA Groupe Amérique du Nord | Montréal | Life Sciences and Health Technologies (LSHT) |
| Alain Couture | Montréal | Couture, COUTURE |
| Alaya Care Inc (Alaya Soins Inc) | Laurent | Life Sciences and Health Technologies (LSHT) |
Publicité (Desktop) Publicité (Mobile) |
| Alayacare | Québec | Life Sciences and Health Technologies (LSHT) |
| Albatrust - Colocation Data Center | Montréal | Information Technologies (IT) |
| Albuca | Pointe-Claire | Life Sciences and Health Technologies (LSHT) |
| Alcatel-Lucent Canada | Montréal | Information Technologies (IT) |
| Alchemy 24 | Montréal | Information Technologies (IT) |
| Alcius | Longueuil | Advertising Agencies |
| Alcoa Canada | Montréal | Aluminum |
| Alcoa Canada Cie | Montréal | Aluminum, Aluminum Fabricators |
| Alcoa innovation | Montréal | Clean Technologies |
| Alcoholicos Anonimos Oficina Intergrupal Hispanade Montreal | Montréal | Addiction Treatments & Information |
Publicité (Desktop) Publicité (Mobile) |
| Alcoholics Anonymous | Montréal | Associations, Addiction Treatments & Information |
| Aldea Solutions Inc | Montréal | Information Technologies (IT) |
| Alethia Biotherapeutics Inc. | Montréal | Life Sciences and Health Technologies (LSHT) |
| Alethia Biothérapeutiques Inc. | Montréal | Life Sciences and Health Technologies (LSHT) |
| Algo Design | Laval | Information Technologies (IT) |
| Algolux | Montréal | Information Technologies (IT) |
| Algorithme Pharma Inc. - Une Compagnie d'Altasciences | Laval | Life Sciences and Health Technologies (LSHT) |
| Alice and smith | Montréal | Information Technologies (IT) |
| Aligo | Montréal | Information Technologies (IT) |
| Alimentation Cinq Sens Inc. | Montréal | Agri-food |
Publicité (Desktop) Publicité (Mobile) |
| Aliments Alasko Inc. | Montréal | Agri-food |
| Aliments Cargill (Les) | Chambly | Agri-food |
| Aliments Cell Inc. | Pointe-Claire | Agri-food |
| Aliments Cibona Foods | Montréal | Agri-food |
| Aliments Conagra Canada Inc. | Boisbriand | Agri-food |
| Aliments Da Vinci Ltée (Les) | Montréal | Agri-food |
| Aliments Dole Canada | Laval | Agri-food |
| Aliments Ed Foods Inc. | Pointe-Claire | Agri-food |
| Aliments Expresco Inc. | Montréal | Agri-food |
| Aliments Fontaine Santé Inc. | Montréal | Agri-food |
Publicité (Desktop) Publicité (Mobile) |
| Aliments Genesis - division de Puresource Inc | Montréal | Agri-food |
| Aliments Horium Inc. | Montréal | Agri-food |
| Aliments Johnvince | Boucherville | Agri-food |
| Aliments Krispy Kernels Inc. | Longueuil | Agri-food |
| Aliments Le Chatel | Laval | Agri-food |
| Aliments Lesters Ltée (Les) | Laval | Agri-food |
| Aliments Maple Leaf Inc. (Les) | Laval | Agri-food |
| Aliments McCain | Montréal | Agri-food |
| Aliments Mello Inc. | Montréal | Agri-food |
| Aliments Mia Inc. (Les) | Montréal | Agri-food |
