| Relationships | Role | Relationship Start | Relationship End |
| West Street Energy Partners Offshore Holding - B, L.P. | Parent | 1/7/2014 | |
| West Street Energy Partners, L.P. | Parent | 1/7/2014 | |
| Mbd 2013 Holdings, L.P. | Parent | 1/7/2014 | |
| Wsepo Investment Holdings | Parent | 1/7/2014 | |
| Mbd 2014 Holdings, L.P. | Parent | 3/19/2014 | |
| Wsepo Investment Holdings | Parent | 1/6/2014 | 1/6/2014 |
| Saint Investment (Cayman) Limited | Subsidary | 1/6/2014 |