| Date | Name | Title | Type | Security | Shares | Price | Value | Ownership | Reported |
| 08/10/2023 | Brown Jason David | Director | Purchase | NBT Bancorp Inc. Common Stock | 650 | $36.99 | $24k | | 08/10/2023 |
| 07/15/2023 | Kingsley Scott Allen | EVP & CFO | Payment of Exercise | NBT Bancorp Inc. Common Stock | 361 | $33.03 | $11.9k | | 07/15/2023 |
| 07/15/2023 | Kingsley Scott Allen | EVP & CFO | Payment of Exercise | NBT Bancorp Inc. Common Stock | 421 | $33.03 | $13.9k | | 07/15/2023 |
| 06/15/2023 | Burns Annette L | SVP, Chief Accounting Officer | Payment of Exercise | NBT Bancorp Inc. Common Stock | 721 | $35.03 | $25.3k | | 06/15/2023 |
| 06/08/2023 | Kowalczyk Andrew S III | Director | Grant | Phantom Stock | 24 | $37.07 | $889.7 | | 06/08/2023 |
| 05/19/2023 | Kowalczyk Andrew S III | Director | Grant | Phantom Stock | 686 | $35.15 | $24.1k | | 05/19/2023 |
| 05/16/2023 | SEIFTER LOWELL A | Director | Grant | NBT Bancorp Inc. Common Stock | 1.2k | $0.00 | $0 | | 05/16/2023 |
| 05/16/2023 | WEBB JACK H | Director | Grant | NBT Bancorp Inc. Common Stock | 1.2k | $0.00 | $0 | | 05/16/2023 |
| 05/16/2023 | Hoeller Heidi M | Director | Grant | NBT Bancorp Inc. Common Stock | 1.2k | $0.00 | $0 | | 05/16/2023 |
| 05/16/2023 | Douglas James H | Director | Grant | NBT Bancorp Inc. Common Stock | 1.2k | $0.00 | $0 | | 05/16/2023 |
| 05/16/2023 | Kowalczyk Andrew S III | Director | Grant | NBT Bancorp Inc. Common Stock | 1.2k | $0.00 | $0 | | 05/16/2023 |
| 05/16/2023 | Robinson V Daniel II | Director | Grant | NBT Bancorp Inc. Common Stock | 1.2k | $0.00 | $0 | | 05/16/2023 |
| 05/16/2023 | Salanger Matthew J | Director | Grant | NBT Bancorp Inc. Common Stock | 1.2k | $0.00 | $0 | | 05/16/2023 |
| 03/20/2023 | Hyle Shaunastar | EVP, Consumer Lending | Grant | NBT Bancorp Inc. Common Stock | 2.1k | $0.00 | $0 | | 03/20/2023 |
| 03/20/2023 | Wiles Amy | EVP, Chief Risk and Credit | Grant | NBT Bancorp Inc. Common Stock | 2.4k | $0.00 | $0 | | 03/20/2023 |
| 03/20/2023 | Wiles Amy | EVP, Chief Risk and Credit | Grant | NBT Bancorp Inc. Common Stock | 3k | $0.00 | $0 | | 03/20/2023 |
| 03/20/2023 | Mahoney Ruth H | EVP/President of Wealth Mgmt | Grant | NBT Bancorp Inc. Common Stock | 3k | $0.00 | $0 | | 03/20/2023 |
| 03/20/2023 | Kingsley Scott Allen | EVP & CFO | Grant | NBT Bancorp Inc. Common Stock | 4.2k | $0.00 | $0 | | 03/20/2023 |
| 03/20/2023 | Halliday Sarah A | EVP / President Comm Banking | Grant | NBT Bancorp Inc. Common Stock | 3.1k | $0.00 | $0 | | 03/20/2023 |
| 03/20/2023 | Halliday Sarah A | EVP / President Comm Banking | Grant | NBT Bancorp Inc. Common Stock | 3k | $0.00 | $0 | | 03/20/2023 |
| 03/20/2023 | Stagliano Joseph R | EVP President Retail Banking | Grant | NBT Bancorp Inc. Common Stock | 3.5k | $0.00 | $0 | | 03/20/2023 |
| 03/20/2023 | Stagliano Joseph R | EVP President Retail Banking | Grant | NBT Bancorp Inc. Common Stock | 3.4k | $0.00 | $0 | | 03/20/2023 |
| 03/20/2023 | WATT JOHN H JR | President & CEO NBT Bancorp | Grant | NBT Bancorp Inc. Common Stock | 10.8k | $0.00 | $0 | | 03/20/2023 |
| 03/20/2023 | WATT JOHN H JR | President & CEO NBT Bancorp | Grant | NBT Bancorp Inc. Common Stock | 11.1k | $0.00 | $0 | | 03/20/2023 |
| 03/20/2023 | Hyle Shaunastar | EVP, Consumer Lending | Grant | NBT Bancorp Inc. Common Stock | 2.6k | $0.00 | $0 | | 03/20/2023 |
| 03/20/2023 | Sparks Martin Randolph | EVP,General Counsel,Secretary | Grant | NBT Bancorp Inc. Common Stock | 3.2k | $0.00 | $0 | | 03/20/2023 |
| 03/07/2023 | Kingsley Scott Allen | EVP & CFO | Purchase | NBT Bancorp Inc. Common Stock | 2.3k | $38.50 | $88.9k | | 03/07/2023 |
| 02/24/2023 | Smaniotto Cynthia A | SVP, Chief HR Officer | Grant | NBT Bancorp Inc. Common Stock | 750 | $0.00 | $0 | | 02/24/2023 |
| 02/24/2023 | Burns Annette L | SVP, Chief Accounting Officer | Grant | NBT Bancorp Inc. Common Stock | 825 | $0.00 | $0 | | 02/24/2023 |
| 01/26/2023 | Brown Jason David | Director | Purchase | NBT Bancorp Inc. Common Stock | 650 | $37.18 | $24.2k | | 01/26/2023 |
| 12/12/2022 | Hoeller Heidi M | Director | Purchase | NBT Bancorp Inc. Common Stock | 750 | $42.48 | $31.9k | | 12/12/2022 |
| 11/15/2022 | Burns Annette L | SVP, Chief Accounting Officer | Payment of Exercise | NBT Bancorp Inc. Common Stock | 271 | $47.67 | $12.9k | | 11/15/2022 |
| 11/15/2022 | Hyle Shaunastar | EVP, Consumer Lending | Payment of Exercise | NBT Bancorp Inc. Common Stock | 541 | $47.67 | $25.8k | | 11/15/2022 |
| 11/15/2022 | Smaniotto Cynthia A | SVP, Chief HR Officer | Payment of Exercise | NBT Bancorp Inc. Common Stock | 285 | $47.67 | $13.6k | | 11/15/2022 |
| 09/23/2022 | Kowalczyk Andrew S III | Director | Grant | Phantom Stock | 40 | $40.87 | $1.6k | | 09/23/2022 |
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