| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| Lyons Billy J Jr. | Director | 37 SOUTH RIVER STREET, AURORA | /s/ Shirley Cantrell, Attorney-in-Fact | 13 Nov 2025 | 0001829064 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | OSBC | Old Second Bancorp, Inc. Common Stock | Award | $495 | +27 | +0.16% | $18.35 | 16,973 | 10 Nov 2025 | Direct | |
| holding | OSBC | Restricted Stock Units | 10,551 | 10 Nov 2025 | Direct |