| carbonn Cities Climate Registry | Academic & Science |
| Centre for Creative and Cultural Research | Academic & Science |
| Calgary Centre for Clinical Research | Academic & Science |
| Center for Climate Change Research | Academic & Science |
| carbonn Cites Climate Registry | Academic & Science |
| Consortial Center for Chiropractic Research | Academic & Science |
| Community Centred College for the Retired | Academic & Science |
| Consumer Chemicals and Containers Regulations | Academic & Science |
| Centre for Climate Change Research | Academic & Science |
| Core Centers for Clinical Research | Academic & Science |
| Center for Cross Cultural Research | Academic & Science |
| Classical Concert Company Reykjavik | Business |
| Career College and Civic Readiness | Business |
| Canadian Centre for Community Renewal | Community |
| Collier Child Care Resources | Community |
| Catholic Coalition for Church Reform | Community |
| Citizens Committee to Complete the Refuge | Community |
| Center for Community Criminology and Research | Community |
| COVER COVER COVER Rodger | General |
| Central Corporate Credit Register | General |
| Clear Creek Cat Rescue | General |
| California Central Coast Region | General |
| Cape Cod Central Railroad | General |
| Classic Car Club Rheintal | General |
| Cotswold Classic Car Run | General |
| Cotswold Classic Car Restorations | General |
| Collin County Conservative Republicans | Governmental |
| Competence Centre for Cancer Research | Medical |
| Center for Colon Cancer Research | Medical |
| Center for Childhood Cancer Research | Medical |
| Closed Chest Cardiac Resuscitation | Medical |
| Canadian Critical Care Review | Regional |
| Cross Creek Camping Resort | Regional |
