| Relationships | Role | Relationship Start | Relationship End |
| Westpac Overseas Holdings Pty Limited | Parent | 6/30/2007 | |
| Westpac Overseas Holdings Pty Limited | Parent | 9/25/1991 | 6/29/2007 |
| Westpac Overseas B.V. (Netherlands) | Parent | 9/30/1987 | 9/24/1991 |
| Westpac Usa Inc. | Subsidary | 6/30/2007 | |
| Westpac Investment Capital Corporation | Subsidary | 6/30/2007 | |
| Westpac Usa Inc. | Subsidary | 9/30/1987 | 6/29/2007 |
| Westpac Investment Capital Corporation | Subsidary | 9/30/1991 | 6/29/2007 |
| Westpac Futures Inc. | Subsidary | 2/6/1992 | 6/30/1993 |