| Relationships | Role | Relationship Start | Relationship End |
| Efs Midstream Holdings, Llc | Parent | 10/19/2015 | |
| Efs Ssp Gp, Llc | Parent | 11/17/2015 | |
| Southern Star Acquisition Corporation | Subsidary | 11/17/2015 |
| Relationships | Role | Relationship Start | Relationship End |
| Efs Midstream Holdings, Llc | Parent | 10/19/2015 | |
| Efs Ssp Gp, Llc | Parent | 11/17/2015 | |
| Southern Star Acquisition Corporation | Subsidary | 11/17/2015 |