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