| Name | Type | Country |
|---|---|---|
| European Software Institute | Enterprise | Spain |
| Euskaltel | Enterprise | Spain |
| EuskoTren | Enterprise | Spain |
| EVARM | Enterprise | Spain |
| Factor CO2 Integral Services | Enterprise | Spain |
| Farsens | Enterprise | Spain |
| Fatronik | Enterprise | Spain |
| FEDERATION INTERNATIONALE DE L'AUTOMOBILE | Enterprise | |
| Fensom System | Enterprise | Spain |
| Fidenet Communication | Enterprise | Spain |