X0609 4 2026-03-23 0000790359 NBT BANCORP INC NBTB 0001741446 Wiles Amy false 52 SOUTH BROAD STREET NORWICH NY 13815 true EVP, Chief Risk and Credit false NBT Bancorp Inc. Common Stock 2026-03-23 4 F 0 114 41.99 D 21386 D NBT Bancorp Inc. Common Stock 2026-03-23 4 A 0 5656 0 A 27042 D NBT Bancorp Inc. Common Stock 2026-03-23 4 A 0 2572 0 A 29614 D Pursuant to NBT Bancorp Inc. Omnibus Restricted Stock Unit Agreement the grant vests 20% annually. Earned restricted stock unit vested following the end of a three-year performance period. By: Annette L. Burns, Power of Attorney For: Amy Wiles 2026-03-25