| Relationships | Role | Relationship Start | Relationship End |
| Gs Capital Partners Vi Offshore Fund, L.P. | Parent | 9/21/2008 | |
| Gs Capital Partners Vi Parallel, L.P. | Parent | 9/21/2008 | |
| Gs Capital Partners Vi Gmbh & Co. Kg | Parent | 9/21/2008 | |
| Gscp Sigma (Lux) Ii S.A R.L. | Subsidary | 9/21/2008 |