| Cogeco Inc | Marie | Cable TV Providers |
| Cogeco Inc Siège Social | Montréal | Cable TV Providers |
| Cogia | Montréal | Computer Consultants |
| Combustible | Montréal | Computer Networking |
| Comfort~One? | Montréal | Flooring |
| Commerce Montex | Montréal | Computer Room Setup, Protection, Equipment & Maintenance |
| Commission des Services Electriques de Montréal | Montréal | Cable TV Providers |
| Communitec | Saint-Hubert | Cable Installation, Splicing & Detection |
| Compagnie Bicc General Cable | Saint-Jérôme | Cabling Equipment & Supplies |
| Compagnie De Carrelages Carmine | Saint-Léonard | Flooring |
Publicité (Desktop) Publicité (Mobile) |
| Compumatik | Montréal | Computer Repair & Cleaning |
| Computer sciences corporation | Montréal | Information Technologies (IT) |
| Computershare Trust Company of Canada | Montréal | Information Technologies (IT) |
| Concept Ceramique Inc | Montréal | Flooring |
| Conception Tekni-B | Brossard | Computer & Technology Assistance Programs |
| Congregation Gate David | Montréal | Flooring |
| Connect&Go | Outremont | Computer Networking |
| Construction D2M | Montréal | Flooring |
| Construction Kumar - 9215646 Canada Inc | Montréal | Flooring |
| Construction Luc Bourdon Inc | Montréal | Flooring |
Publicité (Desktop) Publicité (Mobile) |
| ConstruMD | Montréal | Flooring |
| Consulmac | Toronto | Computer Repair & Cleaning |
| Copiscope | Longueuil | Computer Accessories & Supplies |
| Couper Croiser | Montréal | Tout Commerces au détail, Flooring |
| Couvre Sol Québec | Montréal | Flooring |
| Couvre-Plancher Houle | Montréal | Flooring |
| Couvre-Planchers Dany Bélanger Inc. | Saint-Henri | Flooring |
| Couvre-Planchers de Montréal (Cie De) Inc | Montréal | Flooring |
| CP Pat | Montréal | Flooring |
| CPE Pierrot La Lune, SiègeSocial,InstallationArlequin | Longueuil | Childcare Services |
Publicité (Desktop) Publicité (Mobile) |
| Creative Imaging | Montréal | Computer Graphics Design & Animation |
| Créations Dan Roy Inc | Brossard | Flooring |
| CST Consultants | Montréal | Computer Consultants |
| Cyberlogic | Montréal | Computer Repair & Cleaning |
| Cyberlogic | Montréal | Computer Repair & Cleaning |
| Câblage Dynamique Inc | Montréal | Cable TV Providers |
| Câblage Expert | Sainte-Rose | Cabling Equipment & Supplies |
| Câblage FB Enrg | Auteuil | Cabling Equipment & Supplies |
| Câblage Filotech | Pointe-Aux-Trembles | Cabling Equipment & Supplies |
| Câblages Syl-Tech | Sainte-Catherine | Cabling Equipment & Supplies |
Publicité (Desktop) Publicité (Mobile) |
| Câble & Son | Ste-Rose | Tout Commerces au détail |
| Câble & Son Télécom Ltée | Greenfield Park | Answering Machines & Equipment |
| Céramicom Inc | Laguine | Flooring |
| Céramique Brassard | Montréal | Flooring |
| Céramique Mira-Stelcor Inc. | Montréal | Flooring |
| Céramique Supérieure Enr | Montréal | Flooring |
| Céramique Tilmar Internationale Inc | Saint-Léonard | Flooring |
| Céramiques Calabria | Laurier | Flooring |
| Darwin Dimensions Inc | Montréal | Computer Graphics Design & Animation |
| Data Donnees | Montréal | Computer Data Recovery |
