| Christian Dior SA |
| Christie Manson & Woods Limited |
| Christie's Inc |
| Christie's International plc |
| Chrysalis Guaranteed Limited |
| Church & Dwight Co Inc |
| Churchill College of the University of Cambridge |
| Churchill Insurance |
| Cimbali Group SPA |
| CIME S.C.A. |
| Circle for Training & Consultancy |
| Cisco Systems Inc |
| CISS/Cooperazione Internazionale Sud-Sud [ALSO: CISS Cooperazione Internazionale Sud-Sud] |
| Citigroup Inc |
| City360KZ |
| Civica Election Services |
| Civica UK Ltd. |
| CK Asset Holdings Limited |
| CK Hutchison Holdings Limited |
| CK Noble (UK) Limited |
| Clarins Group |
| Classroom Publications Limited |
| Clays Ltd. |
| Clear Solutions International Limited |
| Clearspring Ltd |