| Relationships | Role | Relationship Start | Relationship End |
| Gs International Infrastructure Partners I, L.P. | Parent | 9/21/2008 | |
| Gs Global Infrastructure Partners I, L.P. | Parent | 9/21/2008 | |
| Kalorama, L.P. | Parent | 9/21/2008 | |
| Matador Infra B.V. | Subsidary | 9/21/2008 |