| Relationships | Role | Relationship Start | Relationship End |
| Gs International Infrastructure Partners I, L.P. | Parent | 9/21/2008 | 12/31/2013 |
| Gs Infrastructure Knight Holdings Corp. | Parent | 9/21/2008 | 12/31/2013 |
| Kinder Morgan, Inc. | Subsidary | 8/14/2009 | 10/17/2012 |