| Clinique |
| Club des Activités de Plongée de Bizerte |
| Clydesdale Bank plc |
| CMC Connect LLP |
| Co-operative Bank Holdings Limited |
| Co-operative Bank of Oromia |
| Co-operative Group Limited |
| Cobham Limited [was plc] |
| Coca-Cola Company, The |
| Coca-Cola FEMSA |
| Coca-Cola Hellenic Bottling Company |
| Cockpit Arts |
| Cocoa Loco Ltd |
| Coda Producoes Artísticas LTDA |
| Coffee Republic Holdings Limited |
| Coffee Republic Retail Limited |
| Coffee#1 ltd |
| Coffey |
| Coin Street Community Builders Limited |
| Colgate-Palmolive Co |
| Collins Institute of English |
| Columbia Sportswear Co Inc |
| COMAR Assurances |
| Comcast Corporation |
| Comedic Ltd |