| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| ADAMS BRADLEY S. | CFO & COO | 37 S. RIVER ST., AURORA | /s/ Shirley Cantrell, Attorney-in-Fact | 24 Feb 2026 | 0001598917 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | OSBC | Restricted Stock Units | Award | $0 | +25,428 | +33% | $0.000000 | 102,872 | 17 Feb 2026 | Direct | F1 |
| transaction | OSBC | Restricted Stock Units | Tax liability | $60,126 | -2,923 | -3% | $20.57 | 93,926 | 21 Feb 2026 | Direct | F2 |
| holding | OSBC | Old Second Bancorp, Inc. Common Stock | 149,331 | 17 Feb 2026 | Direct | F3 | |||||
| holding | OSBC | Old Second Bancorp, Inc. Common Stock | 10,124 | 17 Feb 2026 | By 401-k Plan |
| Id | Content |
|---|---|
| F1 | Each restricted stock unit represents a contingent right to receive one share of common stock. The reporting person was granted 25,428 restricted stock units on the date of the grant, 12,714 of which are time-based restricted stock units that vest on the third anniversary of the grant date, and 12,714 of which are performance-based restricted stock units that may vest and convert to shares within a range from 0% to 175% of the underlying performance-based restricted stock units originally awarded, depending on our compensation committee approved performance metrics. Vested shares, if any, will be delivered to the reporting person in 3 to 5 business days from the date of vesting. |
| F2 | Represents shares held by the issuer to satisfy applicable tax withholding obligations in connection with the vesting of 8,946 previously reported time-based restricted stock units, the remaining shares of which were issued and added to the reporting person's common stock holdings. |
| F3 | Included in this total are 75,300 shares held jointly with spouse with a broker, and 74,031 shares held jointly with spouse outright. |