| Connexim Inc | Montréal | Automation Systems & Equipment |
| Connexxion Lavage Pression Inc | Verdun | Chemical & Pressure Cleaning Systems |
| Contrôles ABY Inc | Mont-Saint-Hilaire | Automation Systems & Equipment |
| Cooper Power Systems | Montréal | Life Sciences and Health Technologies (LSHT) |
| Corbeil Haute Pression | Varennes | Chemical & Steam Cleaning Systems |
| Cordileone Santino N | Montréal | Accounting Services |
| Couvre-Planchers PRÉVOST & ASSOCIÉ | Pierrefonds | Central Vacuum Systems |
| CPL Comptabilité | Saint-Léonard | Accounting Services |
| CPU Info | Longueuil | Bookkeeping |
| Cryo-Air | Léry | Air Conditioning Systems & Parts |
Publicité (Desktop) Publicité (Mobile) |
| CS Communication & Systems Canada Inc. | Montréal | Clean Technologies |
| Custom Downstream Systems Inc. | Lachine | Tout Entreprises et services |
| Cyclo Vac Laval | Vimont | Central Vacuum Systems |
| Céline Bissonnette | Saint-Hubert | Accounting Services |
| D&M Solution Comptable | Saint-Léonard | Accounting Services |
| D&M Solutions Comptables Inc | Saint-Léonard | Accounting Services |
| Dacima Software | Alexis-Nihon | Life Sciences and Health Technologies (LSHT) |
| Daikin Applied Canada Inc | Longueuil | Air Conditioning Systems & Parts |
| Daikin Comfort | Longueuil | Air Conditioning Systems & Parts |
| Dana Smith Nettoyage Specialise Inc | Verdun | Chemical & Pressure Cleaning Systems |
Publicité (Desktop) Publicité (Mobile) |
| DASSAULT SYSTÈMS INC. | Montréal | Aerospace |
| Delarosbil Chaput CPA | Saint-Lambert | Accounting Services |
| Delevante Software Inc | Côte Saint-Luc | Boutiques |
| Denis Dompierre CGA | Longueuil | Accounting Services |
| Denis Dompierre CPA M Fisc | Longueuil | Accounting Services |
| Des Groseilliers Pierre C A | Saint-Lambert | Accounting Services |
| Des Groseilliers Pierre C A Inc | Saint-Lambert | Accounting Services |
| Descartes Systems (Canada) Inc | Montréal | Information Technologies (IT) |
| Desjardins Sécurité Du Bâtiment | Montréal | Automatic Fire Sprinkler Systems, Tout Entreprises et services |
| Devtech Inc | Montréal | Automation Systems & Equipment |
Publicité (Desktop) Publicité (Mobile) |
| Dg Climatisation 9300-8662 Québec Inc | Saint-Hubert | Air Conditioning Systems & Parts |
| Digimicro Inc | Brossard | Automation Systems & Equipment |
| Dima Froid Inc | Saint-Léonard | Air Conditioning Systems & Parts |
| Directed Electronics Canada Inc | Lachine | Car Alarm Systems |
| Directed Electronics Canada Inc | Lachine | Car Alarm Systems |
| Directed Electronics Canada Inc | Lachine | Car Alarm Systems |
| Directed Electronics Canada Inc | Delson | Car Alarm Systems |
| Distribution ACQ | Montréal | Automation Systems & Equipment |
| Distribution Dutech | Laval | Air Conditioning Systems & Parts |
| Disvacc | Montréal | Air Conditioning Systems & Parts |
Publicité (Desktop) Publicité (Mobile) |
| Dlr Services Comptables Inc. | Saint-Lambert | Accounting Services |
| DM CPA Inc | Montréal | Accountants, Accounting Services |
| Double-Take Software Canada Inc | Montréal | Information Technologies (IT) |
| Dti Software | Montréal | Computer Graphics Design & Animation |
| DTI Software | Montréal | Information Technologies (IT) |
| DTI Software/ Global Eagle Entertainment/ GEE | Montréal | Information Technologies (IT) |
| DTI-SOFTWARES | Montréal | Aerospace |
| Dubé & Tétreault CPA S E N C R L | Longueuil | Bookkeeping |
| Dufour Charbonneau Brunet Et Associées Inc | Brossard | Accounting Services |
| Duovac | Laval | Central Vacuum Systems |
