NBT BANCORP INC - Director's Dealing 2015

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: NBT BANCORP INC (NBTB)
CIK: 0000790359
Period of Report: 2015-05-28

Reporting Person: DIETRICH MARTIN A (Director, President & CEO NBT Bancorp)

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2015-05-28	NBT Bancorp Inc. Common Stock	S	13027.0	$24.7661	Disposed	186356.569	Direct

Security	Exercise Price	Expiration	Underlying	Shares	Ownership
Non-Qualified Stock Option (right to buy)	$20.19	2020-01-15	NBT Bancorp Inc. Common Stock (25000)	25000	Direct
Non-Qualified Stock Option (right to buy)	$20.3617	2018-01-15	NBT Bancorp Inc. Common Stock (25000)	25000	Direct
Non-Qualified Stock Option (right to buy)	$20.94	2021-11-18	NBT Bancorp Inc. Common Stock (30000)	30000	Direct
Non-Qualified Stock Option (right to buy)	$22.352	2016-01-01	NBT Bancorp Inc. Common Stock (30000)	30000	Direct
Non-Qualified Stock Option (right to buy)	$24.4458	2015-08-01	NBT Bancorp Inc. Common Stock (6470)	6470	Direct
Non-Qualified Stock Option (right to buy)	$24.5692	2017-12-27	NBT Bancorp Inc. Common Stock (12641)	12641	Direct
Non-Qualified Stock Option (right to buy)	$25.36	2024-10-29	NBT Bancorp Inc. Common Stock (1166)	1166	Direct
Non-Qualified Stock Option (right to buy)	$25.38	2019-01-15	NBT Bancorp Inc. Common Stock (25000)	25000	Direct
Non-Qualified Stock Option (right to buy)	$25.762	2017-01-01	NBT Bancorp Inc. Common Stock (28000)	28000	Direct

F1: The sale price is the weighted average of 13,027 shares sold at prices between $24.73 and $24.8275.

F2: Pursuant to NBT Bancorp Inc. Omnibus Stock Option Agreement the grant vests 40% for first year, 20% annually for following years.

F3: Pursuant to NBT Bancorp Inc. 1993 Stock Option Plan grant vests 40% for first year, 20% annually for following years.

F4: Pursuant to NBT Bancorp Inc. 1993 Stock Option Plan reload grant vests 100% two years after date of its grant.