| Climate and Clean Air Coalition | Academic & Science |
| Carolina Computer Access Center | Academic & Science |
| Cash Check and Charge | Accounts and Finance |
| Citizens Coinage Advisory Committee | Business |
| Commonwealth Christian Athletic Conference | Community |
| Chicago Cultural Accessibility Consortium | Community |
| Chicagoland Collegiate Athletic Conference | Community |
| Community College of Allegheny College | Community |
| Clifton Cultural Arts Center | Community |
| Community Christian Alliance Church | Community |
| Chicago Central Area Committee | Community |
| Community Circus Arts Corporation | Community |
| Catholic Charities for the Archdiocese of Chicago | Community |
| Centre City Advisory Committee | Community |
| City Clerks Association of California | Community |
| Community College of Allegheny County | Educational Institute |
| California College of Arts and Crafts | Educational Institute |
| Credential Counselors and Analysts of California | General |
| Constant Change And Confusion | General |
| Closed Circuit Audio Collection | General |
| Constantly Concerned About Customers | General |
| Changi Coast Adventure Centre | General |
| Chongqing Changan Automobile Company | General |
| Champ Car Atlantic Championship | General |
| Clube Carros Antigos Carajas | General |
| Central Coast American Classic | General |
| Child Care Action Campaign | Governmental |
| Community Care Access Centre | Medical |
| Canadian Council on Animal Care | Medical |
| Continuing Care Accreditation Commission | Medical |
| City County Athletic Complex | Sports |
