| Cm Taschereau | Pointe-Claire | cm |
| CMR (CIRCUITS) LTÉE | Pointe-Claire | Aerospace |
| Cmyktoner | Côte Saint-Luc | Computer Networking |
| Cna | Montréal | Computer Consultants |
| Cnf Couvreur | Pointe-Aux-Trembles | Roofing |
| Cocoapp | Montréal | Computer Consultants |
| Cogia | Montréal | Computer Consultants |
| Coiffure Balance | Pointe-Claire | Beauty & Fitness, Hairdressers & Beauty Salons |
| Coiffure Butterfly | Pointe-Claire | Beauty & Fitness, Hairdressers & Beauty Salons |
| Coiffure Esthetique Brunette | Pointe-Claire | Beauty & Fitness, Hairdressers & Beauty Salons |
Publicité (Desktop) Publicité (Mobile) |
| Coiffure Illusion Enr | Pointe-Calumet | Beauty & Fitness, Hairdressers & Beauty Salons |
| Coiffure La Pointe aux 4 Vents | Boucherville | Beauty & Fitness, Hairdressers & Beauty Salons |
| Coiffure Vivalis | Pointe-Claire | Beauty & Fitness, Hairdressers & Beauty Salons |
| Cole Freight Inc. | Pointe-Claire | Tout Entreprises et services |
| Colonial Elegance | Montréal | Tout Entreprises et services |
| Combustible | Montréal | Computer Networking |
| ComClaire | Verdun | Communications & Public Relations Consultants |
| Comfort Inn Montreal Aeroport | Pointe-Claire | Tout Tourisme et hôtels |
| Comité ZIP Jacques-Cartier | Montréal | Tout Entreprises et services |
| Commerce Montex | Montréal | Computer Room Setup, Protection, Equipment & Maintenance |
Publicité (Desktop) Publicité (Mobile) |
| Commerce xp Eastern Canada | Pointe-Claire | Auctions |
| Commission des services électriques... | Ahuntsic Et Cartierville | Tout Entreprises et services |
| Communication Impact Image | Candiac | Communications & Public Relations Consultants |
| Communications ABC Inc | Outremont | Communications & Public Relations Consultants |
| Compagnie Bicc General Cable | Saint-Jérôme | Cabling Equipment & Supplies |
| Compagnie Bonbon Rio Inc, La | Pointe-Aux-Trembles | Agri-food |
| Compagnie Gillette Canada | Pointe-Claire | Tout Entreprises et services |
| Competia | Centre-Ville | Tout Entreprises et services |
| Comptabilité SOS Entrepreneurs | Laval-Des-Rapides | Tout Entreprises et services |
| CompuCom Systems, Inc. | Montréal | Tout Entreprises et services |
Publicité (Desktop) Publicité (Mobile) |
| Compugen Inc. | Mont-Royal | Information Technologies (IT), Tout Informatique et internet |
| Compumatik | Montréal | Computer Repair & Cleaning |
| Computer sciences corporation | Montréal | Information Technologies (IT) |
| Computershare Trust Company of Canada | Montréal | Information Technologies (IT) |
| Conception Tekni-B | Brossard | Computer & Technology Assistance Programs |
| Concordia Cabinet Conseil, inc. | Mauricie | Tout Entreprises et services |
| Concordia Physio Sport - Pointe-Claire | Pointe-Claire | Physiotherapy |
| Concordia Physio Sport- Pointe Claire Village | Pointe-Claire | Physiotherapy |
| Connect&Go | Outremont | Computer Networking |
| Connectalk Inc. | Montréal | Tout Informatique et internet |
Publicité (Desktop) Publicité (Mobile) |
| Consolidated Bottle Company | Pointe-Claire | Tout Entreprises et services |
| Consolidated Bottle Corporation | Pointe-Claire | Bottles & Jars |
| Consolidated Bottle Corporation | Pointe-Claire | Bottles & Jars |
| Construction JN Inc | Pointe-Aux-Trembles | Home Improvement |
| Consulmac | Toronto | Computer Repair & Cleaning |
| CONSULTANTS AEROSYNC LTÉE | Rosemère | Aerospace |
| Consultants Akitek Inc | Montréal | Automation Consultants |
| Consultants B&M senc | Montréal | Civil Engineers |
| Consultants Electrique D & D Inc | Montréal | Electricians |
| Consultants En Récupération A Douville & Ass Lté e | Laval | Auctions |
