| Campus Chemical Instrument Center | Academic & Science |
| Cambridge Conference Interpretation Course | Academic & Science |
| College Career Information Center | Academic & Science |
| Connecticut Conference of Independent Colleges | Academic & Science |
| Caribbean Climate Innovation Center | Academic & Science |
| Cherry Creek Innovation Campus | Academic & Science |
| College Consolidation Implementation Committee | Academic & Science |
| Canadian Council for International Co-operation | Business |
| Crown Castle International Corporation | Business |
| Consolidated Contractors International Company | Business |
| China Certification & Inspection Group | Business |
| Cyber COPE Insurance Certification | Business |
| China Certification and Inspection Company | Business |
| Certified Chiropractic Insurance Consultant | Business |
| Combined Companies International (de-listed) | Business |
| Caracle Creek International Consulting | Business |
| Chinese Church In Christ | Community |
| Coalition for Consumer Information on Cosmetics | Community |
| Chinese Community Information Center | Community |
| Child Care Information Centre | Community |
| Chicagoland Cancer Information Coalition | Community |
| Contra Costa Interfaith Coalition | Community |
| Child Care Information Center | Community |
| Community College Innovation Challenge | Community |
| Conference of China IGEMer Community | Community |
| California Cyber Innovation Challenge | Computing |
| Cyber Crime Investigation Cell | Computing |
| Circle City Industrial Complex | General |
| Catalysts Chemicals Industries Co | General |
| Center for Construction Innovation and Collaboration | General |
| Central Cottage Industry of Crafts | General |
| Central California Information Center | Governmental |
| Colorado Crime Information Center | Governmental |
| Centro de Capacitación e Investicación Campesina | International |
| Clinical Cancer Investigations Committee | Medical |
| Comprehensive Cancer Imaging Centre | Medical |
| Complex challenges innovative cities | Regional |
| Committee Concerning Intra Club | Regional |
