| Conferencing In A Box Limited |
| Connect Futures C.I.C. |
| Connells Limited |
| Conscious Skincare Ltd |
| Continental Tours |
| Cooks Global Foods |
| Coop Italia Società Cooperativa |
| Coöperatieve Rabobank U.A. (Rabobank Group) [OLD: Coop. Centrale Raiffeisen-Boerenleenbank] |
| Cooperative Innovations |
| Copper Tun Ltd. [Trading as Nirvana Brewery] |
| Corewoman Corp. |
| Costa Limited |
| Costo Oy |
| Coswell S.p.A. |
| Coty Inc |
| Counterculture Partnership LLP |
| Counterpoints Arts |
| Countrywide Limited |
| Covea |
| Coventry Biennial Ltd |
| Coventry Building Society |
| CPI S.A |
| Craghoppers Ltd |
| Craig Newmark Philanthropies |
| CREA |