| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| Lazzari Melanie A | Executive Vice President | 800 PHILADELPHIA STREET, INDIANA | /s/ Jackie Kennane, attorney-in-fact for Melanie A. Lazzari | 13 Feb 2026 | 0001658977 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | STBA | Common Stock | Other | $12,621 | +321 | +4.2% | $39.35 | 8,041 | 31 Dec 2025 | 401(k) | F1 |
| transaction | STBA | Common Stock | Other | $17,171 | +436 | +3.4% | $39.35 | 13,368 | 31 Dec 2025 | Direct | F2 |
| holding | STBA | Common Stock | 9 | 31 Dec 2025 | Spouse IRA |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Underlying Class | Amount | Exercise Price | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| holding | STBA | Restricted Stock Units | 1,117 | 31 Dec 2025 | Common Stock | 1,117 | Direct | F3, F4 | ||||||
| holding | STBA | Restricted Stock Units | 1,444 | 31 Dec 2025 | Common Stock | 1,444 | Direct | F3, F5, F6 | ||||||
| holding | STBA | Restricted Stock Units | 523 | 31 Dec 2025 | Common Stock | 523 | Direct | F3, F7 | ||||||
| holding | STBA | Restricted Stock Units | 510 | 31 Dec 2025 | Common Stock | 510 | Direct | F3, F8 |
| Id | Content |
|---|---|
| F1 | These shares represent the YTD increase in shares held in a 401K/IRA plan. |
| F2 | Increase due to reinvested dividends in a dividend reinvestment plan. |
| F3 | Each restricted stock unit represents a contingent right to receive one share of S&T Bancorp, Inc. common stock. |
| F4 | The restricted stock units vest in three equal annual installments beginning April 1, 2025. Vested shares will be delivered to the reporting person upon vesting. |
| F5 | Filing delay due by April 3, 2025, caused by software unable to attach footnotes to awards. |
| F6 | The restricted stock units vest in three equal annual installments beginning April 1, 2026. Vested shares will be delivered to the reporting person upon vesting. |
| F7 | The restricted stock units vest in three equal annual installments beginning April 1, 2024. Vested shares will be delivered to the reporting person upon vesting. |
| F8 | On April 10, 2023, the Registrant awarded a special grant to the executive officer that will vest equally over the three successive anniversary dates of the grant date. |