| Relationships | Role | Relationship Start | Relationship End |
| Ubs Ag | Parent | 11/30/2007 | |
| Ubs International Infrastructure Fund Gp Cayman Ltd. | Parent | 11/30/2007 | |
| Ubs Northern D Llc | Subsidary | 10/31/2008 | |
| Ubs Northern B Llc | Subsidary | 11/30/2007 | 10/30/2008 |
| Ubs Northern A Llc | Subsidary | 11/30/2007 | 10/30/2008 |