| Relationships | Role | Relationship Start | Relationship End |
| Banc One Indiana Corporation | Parent | 10/18/1990 | 5/31/1991 |
| Citizens Northern Company, Inc. | Parent | 12/31/1982 | 10/17/1990 |
| Citizens Northern Company, Inc. | Parent | 10/8/1980 | 12/30/1982 |
| Marshall County Bank & Trust Company | Parent | 12/31/1975 | 6/30/1980 |
| Acquisitions & Mergers | Role | Assets | Acct Method | Type | Transaction Date |
| Bank One, Merrillville, National Association | Buyer | 647,135 | Discontinued | 6/1/1991 |