| Relationships | Role | Relationship Start | Relationship End |
| Northern Trust Corporation | Parent | 6/26/1988 | 3/1/1991 |
| Northern Trust Corporation | Parent | 10/1/1982 | 6/25/1988 |
| Northern Trust Bank/Naperville | Subsidary | 10/1/1982 | 6/25/1988 |
| Acquisitions & Mergers | Role | Assets | Acct Method | Type | Transaction Date |
| Northern Trust Corporation | Buyer | Discontinued | 3/2/1991 |