| Relationships | Role | Relationship Start | Relationship End |
| Ameribanc, Inc. | Parent | 2/9/1996 | 7/1/1998 |
| Midamerican Corporation | Parent | 8/29/1989 | 2/8/1996 |
| Midamerican Corporation | Parent | 1/25/1980 | 8/28/1989 |
| Relationships | Role | Relationship Start | Relationship End |
| Ameribanc, Inc. | Parent | 2/9/1996 | 7/1/1998 |
| Midamerican Corporation | Parent | 8/29/1989 | 2/8/1996 |
| Midamerican Corporation | Parent | 1/25/1980 | 8/28/1989 |