| CATALYST | |
| Catalyst Agents | |
| Catalyst Canada | Ontario |
| Catalyst Healthcare Ltd | British Columbia |
| Catalyst Network Solutions | Alberta |
| Catalyst137 | Ontario |
| Catalyx Exchange, Inc. | |
| CaTECH Systems | Ontario |
| Caters Design Gruop | Ontario |
| Cathar Games | |
| Catharsis Managed IT | Ontario |
| Catherine Imagine | Quebec |
| CAVAN | Quebec |
| Cavelo, Inc. | |
| Cayenne Creative | |
| Cayenta | British Columbia |
| CAYK Marketing, Inc. | |
| Cayzu, Inc. | |
| Caza Web Design | Ontario |
| Caztel Communications, Inc. | Quebec |
| CB Automation, Inc. | Ontario |
| CB Communications Web | Quebec |
| CBCI Telecom | Quebec |
| CBL Data Recovery Technologies | Ontario |
| CBM Informatique, Inc. | Quebec |
| Cboe Canada | |
| CBS Bio Platforms, Inc. | Alberta |
| CC Computer Solutions, Inc. | Nova Scotia |
| CC4 Solutions d'affaire IT | |
| CCAI Computer Consulting Associates International | Ontario |
| CCAP Câble | Quebec |
| CCC Networks, Inc. | Ontario |
| CCD Health Systems | British Columbia |
| CCE Medical Equipment | Ontario |
| CCE Télécom | Quebec |
| ccess Computer Solutions | Ontario |
| CCI Canadian Circuits, Inc. | British Columbia |
| CCI Learning | British Columbia |
| CCI Wireless | Alberta |
| CCL Care Computers Ltd | British Columbia |
| CCL Technology Solutions Ltd | British Columbia |
| CCM Informatique | |
| CCRM | |
| CCXIT Computer Services | Ontario |
| CD Computers | Alberta |
| CD Consultants | Quebec |
| CD Info | Quebec |
| CD Informatique | Quebec |
| CDA Systems Ltd | Ontario |
| CDAO Services | |