| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| Cosgrove Peter K | Executive Vice President & CCO | ONE CHEMUNG CANAL PLAZA, PO BOX 1522, ELMIRA | Kathleen E. Cook, Attorney-in-Fact, pursuant to Power of Attorney dated July 16, 2025 | 17 Dec 2025 | 0001785682 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | CHMG | COMMON STOCK | Tax liability | $7,353 | -124 | -1.9% | $59.30 | 6,342 | 15 Dec 2025 | Direct | |
| transaction | CHMG | COMMON STOCK | Tax liability | $3,991 | -67 | -1.1% | $59.57 | 6,275 | 16 Dec 2025 | Direct |