| Relationships | Role | Relationship Start | Relationship End |
| Citigroup Financial Products Inc. | Parent | 6/30/2007 | |
| Citigroup Financial Products Inc. | Parent | 6/14/2000 | 6/29/2007 |
| Citigroup Capital Partners I (Master Fund), Lp | Subsidary | 8/9/2000 | |
| Citigroup Capital Partners I, Lp | Subsidary | 6/14/2000 | |
| Citigroup Capital Partners I (Us-Uk), Lp | Subsidary | 8/9/2000 | |
| Citigroup Capital Partners I Energy, Llc | Subsidary | 2/1/2005 | 5/23/2011 |