MARTIN SPARKS plan to sell securities of NBT BANCORP INC. under Form 144

MARTIN SPARKS filed Form 144 to notify SEC of plan to sell 1200 units of NBT BANCORP INC. securities around 2026-06-12, with aggregate market value of $57,650.04. The total outstanding units is 52010232.0. The amount planned to be sold represents 0.00% of total outstanding units; Recent transactions in past 3 months include: On 03/13/2026, sold 2400 units for $99120.24;