| Relationships | Role | Relationship Start | Relationship End |
| Gs International Infrastructure Partners I, L.P. | Parent | 11/1/2009 | 9/15/2016 |
| Gs Global Infrastructure Partners I, L.P. | Parent | 11/1/2009 | 9/15/2016 |
| Gs Institutional Infrastructure Partners I, L.P. | Parent | 11/1/2009 | 9/15/2016 |
| Athena Holding S.R.L. | Subsidary | 6/5/2015 | 8/31/2016 |