| Relationships | Role | Relationship Start | Relationship End |
| Old Second National Bank | Parent | 1/2/2002 | 12/31/2006 |
| Old Second Bancorp, Inc. | Parent | 6/13/1997 | 1/1/2002 |
| First State Bank Of Maple Park | Parent | 1/31/1991 | 6/12/1997 |
| Acquisitions & Mergers | Role | Assets | Acct Method | Type | Transaction Date |
| Old Second National Bank | Buyer | 2,091,948 | Pooling of Interests | Discontinued | 1/1/2007 |