| Name | Type | Country |
|---|---|---|
| DEEP BLUE SRL | Enterprise | |
| Dimetronic | Enterprise | Spain |
| Dinycon Sistemas | Enterprise | Spain |
| Donostia Turismo | Enterprise | Spain |
| DunavNET | Enterprise | Serbia |
| Electricas Asmotur Uriarte | Enterprise | Spain |
| Eleka | Enterprise | Spain |
| ELSON Electrónica | Enterprise | Spain |
| EMT - Empresa Municipal de Transportes de Madrid | Enterprise | España |
| Enlace Digital S.L. | Enterprise | Spain |