| # | Company name | Role | # of projects |
|---|---|---|---|
| 1 | García - BBM, S.A. | Acoustics consultant | 1 |
| 2 | Gerens Management Group | Project management | 5 |
| 3 | Gesintra | Property management | 0 |
| 4 | Gestacín | Real estate agent | 3 |
| 5 | Gomyl s.a. | Facade maintenance system supplier | 25 |
| 6 | Gondolas in Design | Facade maintenance system supplier | 19 |
| 7 | GOP Oficina de Proyectos S.A. | Architect | 1 |
| 8 | Grupama Plus Ultra | Tenant | 1 |
| 9 | Grupo Acciona | Construction company | 8 |
| 10 | Grupo ACS | Construction company | 8 |
| 11 | Grupo ATISAE | Occupational safety and health | 2 |
| 12 | Grupo Avintia | General contractor | 6 |
| 13 | Grupo DAE | Real estate association | 0 |
| 14 | Grupo EP SA | Structural engineering | 0 |
| 15 | Grupo GV | Developer | 2 |
| 16 | Grupo Ibosa | Developer | 1 |
| 17 | Grupo Inmobiliario Martinsa Fadesa | Developer | 0 |
| 18 | Grupo Inmocaral | Real estate agent | 0 |
| 19 | Grupo Inmoglaciar | Developer | 1 |
| 20 | Grupo Lar | Developer | 16 |