| 3D Aluminum Inc. | Brossard | Aluminum |
| 7571470 Canada Inc. (Opus Pharma) | Montréal | Life Sciences and Health Technologies (LSHT) |
| 77 Design | Montréal | Aluminum |
| 9032-2253 Québec Inc | Pointe-Aux-Trembles | Aluminum |
| A & D Prevost Inc | Richelieu | Aluminum Products |
| A Architecture Inc | Montréal | Architects |
| A+ Products Canada Inc | Montréal | Buckles |
| Abbott Canada (Abbott Nutrition & Santé Animale) | Montréal | Life Sciences and Health Technologies (LSHT) |
| Acasti Pharma Inc. | Laval | Life Sciences and Health Technologies (LSHT) |
| ACDF Architecture | Montréal | Architects |
Publicité (Desktop) Publicité (Mobile) |
| Acier Century Inc | Brossard | Aluminum |
| Acier Lachine Inc | Lachine | Aluminum |
| Acier Leroux Inc | Boucherville | Aluminum |
| Acier Omega Ltée | Saint-Léonard | Aluminum |
| Acier Ouellette Inc | Salaberry-De-Valleyfield | Aluminum |
| Acier Picard | Varennes | Aluminum |
| Acier Wirth Steel | Westmount | Aluminum |
| Actumus | Cherrier | Life Sciences and Health Technologies (LSHT) |
| Adiantum Production (anciennement Laboratoires Capsulab Inc.) | Dollard | Life Sciences and Health Technologies (LSHT) |
| Afmerica Technologie Inc | Châteauguay | Carbon Products |
Publicité (Desktop) Publicité (Mobile) |
| Agence Fitz | Montréal | Baby Products & Accessories |
| Al-Ré Pierre Aluminium Enr | Brossard | Aluminum |
| Alan Hui Architects | Montréal | Architects |
| Alcan Inc | Montréal | Aluminum, Aluminum Fabricators |
| Alclaurey Aluminium Inc | Brossard | Aluminum |
| Alcoa Canada | Montréal | Aluminum |
| Alcoa Canada Cie | Montréal | Aluminum, Aluminum Fabricators |
| Alethes Architecture | Montréal | Architects |
| Alger Aluminium (1989) Enr | Laval | Aluminum |
| Ali Salim | Laval | Architects |
Publicité (Desktop) Publicité (Mobile) |
| Allied Aluminum Products Compagny Inc | Montréal | Aluminum Products |
| Altamed Pharma | Montréal | Life Sciences and Health Technologies (LSHT) |
| Alumicor Limited | Montréal | Aluminum, Aluminum Products, Architects |
| Alumilex | Montréal | Aluminum |
| Alumina | Saint-Léonard | Aluminum |
| Aluminium Adm et Fils | Laval | Aluminum |
| Aluminium Alouette Inc | Longueuil | Aluminum |
| Aluminium André Gagnon | Brossard | Aluminum |
| Aluminium Austria Metall Quebec Inc | Montréal | Aluminum |
| Aluminium C Bouchard & Fils Inc | Terrebonne | Aluminum Products |
Publicité (Desktop) Publicité (Mobile) |
| Aluminium D Gravel Inc | Saint-Hubert | Aluminum |
| Aluminium Distinction | Anjou | Aluminum, Aluminum Fabricators |
| Aluminium Distinction | Montréal | Aluminum, Aluminum Fabricators |
| Aluminium DP | Longueuil | Aluminum Products |
| Aluminium E. Delaunais | Brossard | Aluminum |
| Aluminium Elron Inc | Dollard Des Ormeaux | Aluminum Products |
| Aluminium Fenebel 1964 Inc | Montréal | Aluminum, Aluminum Products |
| Aluminium L Lauzon | Verdun | Aluminum |
| Aluminium Maurice Forest Inc | Montréal | Aluminum, Aluminum Products, Balconies |
| Aluminium Notre-Dame | Brossard | Aluminum Fabricators, Aluminum Products |
