| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| Lyons Billy J Jr. | Director | 37 SOUTH RIVER STREET, AURORA | /s/ Shirley Cantrell, Attorney-in-Fact | 10 Feb 2026 | 0001829064 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | OSBC | Old Second Bancorp, Inc. Common Stock | Award | $488 | +23 | +0.14% | $21.21 | 16,996 | 09 Feb 2026 | Direct | |
| holding | OSBC | Restricted Stock Units | 10,551 | 09 Feb 2026 | Direct |