| 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 | 22 Dec 2025 | 0001785682 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | CHMG | COMMON STOCK | Tax liability | $6,764 | -117 | -1.9% | $57.81 | 6,158 | 19 Dec 2025 | Direct | |
| transaction | CHMG | COMMON STOCK | Tax liability | $6,128 | -106 | -1.7% | $57.81 | 6,052 | 19 Dec 2025 | Direct |