| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| Halliday Sarah A | EVP/Chief Comm Innovation Off | 52 SOUTH BROAD STREET, NORWICH | By: Annette L. Burns, Power of Attorney For: Sarah A. Halliday | 13 Feb 2026 | 0001707868 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | NBTB | NBT Bancorp Inc. Common Stock | Other | $0 | +250 | +3.4% | $0.000000 | 7,653 | 31 Dec 2025 | 401k | F1 |
| holding | NBTB | NBT Bancorp Inc. Common Stock | 28,187 | 31 Dec 2025 | Direct |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Underlying Class | Amount | Exercise Price | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | NBTB | Phantom Stock | Other | $0 | +173 | +3.4% | $0.000000 | 5,318 | 31 Dec 2025 | NBT Bancorp Inc. Common Stock | 173 | Direct | F2, F3 |
| Id | Content |
|---|---|
| F1 | Shares were purchased through payroll deferral and/or dividend reinvestment from 1/1/2025 to 12/31/2025 through NBT Bancorp Inc. 401k Plan. |
| F2 | Each share of phantom stock is deemed invested in one share of NBT Bancorp Inc. common stock pursuant to the terms of the Deferred Compensation Plan. |
| F3 | Shares were purchased through payroll deferral and/or dividend reinvestment from 1/1/2025 to 12/31/2025 through a NBT Bancorp Inc. deferred compensation plan. |