| CP Tech | Québec | Tout Entreprises et services |
| CP TECH INC. (CENTRE DE PLACAGE) | Montréal | Aerospace |
| Crowdsourced Testing | Québec | Information Technologies (IT) |
| CROY ARCHITECTURE DESIGN | Montréal | Architectural Technologists |
| CRYOS TECHNOLOGIES INC. | De Salaberrry | Life Sciences and Health Technologies (LSHT) |
| CS Communication & Systems Canada Inc. | Montréal | Clean Technologies |
| Cuisines Tech Profab Inc | Repentigny | Kitchen Cabinets |
| Cybernitech | Richard-Tapp | Life Sciences and Health Technologies (LSHT) |
| Cycle Technique | Montréal | Bicycle Stores |
| CYME International T&D | Saint Bruno-De Montarville | Information Technologies (IT) |
Publicité (Desktop) Publicité (Mobile) |
| Câblages Syl-Tech | Sainte-Catherine | Cabling Equipment & Supplies |
| D + H Interchèques | Longueuil | Information Technologies (IT) |
| D-Tech Electriques | Montréal | Electricians |
| D2 Technologie Inc | Greenfield Park | Appliance Manufacturers & Wholesalers |
| Da Te | Montréal | te |
| Daniel Robert Terrassement (entrepreneur général) | Pointe-Aux-Trembles | Landscaping |
| Dassault Systemes (3DS) | Québec | Life Sciences and Health Technologies (LSHT) |
| Datex Canada | Montréal | Information Technologies (IT) |
| Datrox Computer Technologies Inc. | Montréal | Tout Informatique et internet |
| Dauphin Technologie | Laval | Computer Data Processing |
Publicité (Desktop) Publicité (Mobile) |
| Dauphin Technologie Quebec | Laval | Computer Data Processing |
| Davids Tea | Mont-Royal | Agri-food |
| De La Tête Aux Pieds Massothérapie | Repentigny | Health and Beauty |
| Dealflo Limited | Montréal | Information Technologies (IT) |
| Dectro International | Montréal | Life Sciences and Health Technologies (LSHT), Tout Commerces au détail |
| Definitechs | Montréal | Information Technologies (IT) |
| Deluxe Entertainment Services Group, Inc | Montréal | Information Technologies (IT) |
| Dempton Solutions Technologiques Inc | Montréal | Computer Consultants |
| Denso International America Inc | Montréal | Information Technologies (IT) |
| Dermtek Pharmaceutical Ltd | Montréal | Life Sciences and Health Technologies (LSHT) |
Publicité (Desktop) Publicité (Mobile) |
| Dermtek Pharmaceutique Ltée | Dorval | Life Sciences and Health Technologies (LSHT) |
| Descartes Systems (Canada) Inc | Montréal | Information Technologies (IT) |
| Design Paysager Vert Tendre | Montréal | Landscaping |
| Design Technology | Pointe-Claire | Tout Informatique et internet |
| DiaTech Oncology®, developers of CorrectChemo® | Montréal | Life Sciences and Health Technologies (LSHT) |
| Digi-Sat Plus Technologies Inc | Montréal | Audiovisual Equipment & Supplies |
| Directed Electronics Inc | Montréal | Information Technologies (IT) |
| Distech Controls | Brossard | Life Sciences and Health Technologies (LSHT) |
| Diversi-Tech Inc. | Dorval | Tout Entreprises et services |
| Doc-Tec | Montréal | Computer Repair & Cleaning |
Publicité (Desktop) Publicité (Mobile) |
| Domus Technologies Inc | Montréal | Plumbing |
| Dontnod Entertainment | Montréal | Information Technologies (IT) |
| DORVAL TECHNOLOGIES INC. | Montréal | Aerospace |
| Dotcom-Specialiste en Technologies de L'information | Montréal | Computer Cabling, Installation & Service |
| Dotcom-Specialiste en Technologies de L'information | Montréal | Computer Consultants |
| Dr Tewfik Yahia-Sherif Inc | Greenfield Park | Medical Clinics |
| Dr Tint Vitres Teintées | Montréal | Auto Glass & Windshields, Tout Commerces au détail |
| DTI Software/ Global Eagle Entertainment/ GEE | Montréal | Information Technologies (IT) |
| Dundee Sustainable Technologies | Montréal | Life Sciences and Health Technologies (LSHT) |
| Duradek-Technidek | Terrebonne | Home Improvement |
