| CERESIA VISION | |
| CERTAGEN VHL GENETICS | |
| CESPEDES | |
| CFT | |
| CHEVILLIOT | |
| CHOKER | |
| CID LINES | |
| CIMEC | |
| CIPERGEN | |
| CLEANWOOD | |
| CMP | |
| COLLO ANALYZER | |
| COMPO SERIE-S | |
| COMPRAR | |
| CONCETTI | |
| CONDAIR HUMIDIFICACIÓN S.A | |
| Condair Humidificación S.A. | |
| CONEXIONES Y MANGUERAS (CYMAN) | |
| CONSTRUCCIONES MECÁNICAS FORNS ,S.A | |
| CONTACESA | |