Form 3 Filing for Joseph P. Sergienko

This filing reports initial beneficial ownership of NBT Bancorp Inc. common stock for Joseph P. Sergienko, Chief Risk Officer. Following the reporting period, Mr. Sergienko holds 123.323 shares indirectly through a 401k and 2863 shares directly. The filing also includes a Power of Attorney document, appointing Annette Burns and Scott Kingsley as attorneys-in-fact to execute and file necessary SEC forms (3, 4, and 5) on behalf of Mr. Sergienko, as required by Section 16(a) of the Securities Exchange Act of 1934. This authorization remains in effect until Mr. Sergienko is no longer required to file such forms or until earlier revoked in writing.