| Relationships | Role | Relationship Start | Relationship End |
| Maple Park Bancshares, Inc. | Parent | 10/2/1984 | 6/12/1997 |
| Old Second Mortgage Company | Subsidary | 1/31/1991 | 6/12/1997 |
| Maple Park Leasing Co., Inc. | Subsidary | 8/16/1993 | 12/31/1995 |
| Acquisitions & Mergers | Role | Assets | Acct Method | Type | Transaction Date |
| Old Second National Bank | Buyer | 2,091,948 | Pooling of Interests | Discontinued | 6/13/1997 |