| Name | Type | Country |
|---|---|---|
| Gobierno Vasco | Public administration | Spain |
| GOIENER coop | Enterprise | Spain |
| Green Concept | Enterprise | Spain |
| Grupo Santander | Enterprise | Spain |
| Hafenstrom As | Enterprise | |
| 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 |