| Relationships | Role | Relationship Start | Relationship End |
| Morgan Stanley Infrastructure Gp Lp | Parent | 9/23/2008 | |
| Msip Mgt Holdings Lp | Subsidary | 9/23/2008 | |
| Msip International Holdings Cv | Subsidary | 4/9/2013 | |
| Cmp A Holdings, Llc | Subsidary | 9/23/2008 | |
| Cmp B Holdings, Llc | Subsidary | 9/23/2008 | |
| Msip Southern Star Llc | Subsidary | 1/25/2010 | |
| Msip Hedging Sub Lp | Subsidary | 9/23/2008 | |
| Essencia Energy Llc | Subsidary | 3/2/2012 | |
| Msip Southern Star Ii Llc | Subsidary | 8/6/2012 | |
| Msip Pelicano Holding L.P. | Subsidary | 9/23/2008 | 11/7/2011 |