| Name | Type | Country |
|---|---|---|
| HI IBERIA INGENIERIA Y PROYECTOS SL | Enterprise | Spain |
| Hive Power Sagl | Enterprise | Italy |
| HOP UBIQUITOUS SL | Enterprise | |
| Hospital Virgen del Rocío | Enterprise | Spain |
| HYPERTECH | Enterprise | Greece |
| i68 | Enterprise | Spain |
| Ibarreta S.A. | Enterprise | Spain |
| Iberdrola | Enterprise | Spain |
| Ibermatica | Enterprise | Spain |
| IBM | Enterprise | United States of America |