Ownership Submission
FORM 5
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
Form 3 Holdings Reported
Form 4 Transactions Reported
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

ANNUAL STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940
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1. Name and Address of Reporting Person *
DIETRICH MARTIN A
 2. Issuer Name and Ticker or Trading Symbol
NBT BANCORP INC [NBTB] 		5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
__X__ Director _____ 10% Owner
__X__ Officer (give title below) _____ Other (specify below)
President & CEO NBT Bancorp
(Last)
(First)
(Middle)

52 SOUTH BROAD STREET		 3. Statement for Issuer's Fiscal Year Ended (Month/Day/Year)
12/31/2015
(Street)


NORWICH, NY 13815		 4. If Amendment, Date Original Filed(Month/Day/Year)
 6. Individual or Joint/Group Reporting
(check applicable line)

_X_ Form Filed by One Reporting Person
___ Form Filed by More than One Reporting Person
(City)
(State)
(Zip)
Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security
(Instr. 3)		 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code
(Instr. 8)		 4. Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5)		 5. Amount of Securities Beneficially Owned at end of Issuer's Fiscal Year
(Instr. 3 and 4)		 6. Ownership Form: Direct (D) or Indirect (I)
(Instr. 4)		 7. Nature of Indirect Beneficial Ownership
(Instr. 4)
Amount (A) or (D) Price
NBT Bancorp Inc. Common Stock 11/24/2015   G 1,660 D $ 0 190,842.569 D  
NBT Bancorp Inc. Common Stock 12/31/2015   J 267.476 A $ 0 (1) 191,110.045 D  
NBT Bancorp Inc. Common Stock 12/31/2015   J 334.683 A $ 0 (2) 19,280.595 I 401k
NBT Bancorp Inc. Common Stock             755 I Custodian for Minor
NBT Bancorp Inc. Common Stock             10,731.723 I NBT Bancorp ESOP

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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 3)		 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year) 3A. Deemed Execution Date, if any (Month/Day/Year) 4. Transaction Code
(Instr. 8)		 5. Number of Derivative Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4, and 5)		 6. Date Exercisable and Expiration Date
(Month/Day/Year)		 7. Title and Amount of Underlying Securities
(Instr. 3 and 4)		 8. Price of Derivative Security
(Instr. 5)		 9. Number of Derivative Securities Beneficially Owned at End of Issuer's Fiscal Year
(Instr. 4)		 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 4)		 11. Nature of Indirect Beneficial Ownership
(Instr. 4)
(A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares
Non-Qualified Stock Option (right to buy) $ 20.19           01/15/2011(3) 01/15/2020 NBT Bancorp Inc. Common Stock
25,000
  25,000
D
 
Non-Qualified Stock Option (right to buy) $ 20.3617           01/15/2009(4) 01/15/2018 NBT Bancorp Inc. Common Stock
25,000
  25,000
D
 
Non-Qualified Stock Option (right to buy) $ 25.15           10/29/2016(5) 10/29/2024 NBT Bancorp Inc. Common Stock
20,575
  20,575
D
 
Non-Qualified Stock Option (right to buy) $ 25.36           10/29/2016(5) 10/29/2024 NBT Bancorp Inc. Common Stock
1,166
  1,166
D
 
Non-Qualified Stock Option (right to buy) $ 25.38           01/15/2010(3) 01/15/2019 NBT Bancorp Inc. Common Stock
25,000
  25,000
D
 
Non-Qualified Stock Option (right to buy) $ 25.762           01/01/2008(4) 01/01/2017 NBT Bancorp Inc. Common Stock
28,000
  28,000
D
 
Non-Qualified Stock Option (right to buy) $ 26.67           09/14/2017(5) 09/14/2025 NBT Bancorp Inc. Common Stock
13,641
  13,641
D
 

Reporting Owners

Reporting Owner Name / Address Relationships
Director 10% Owner Officer Other
DIETRICH MARTIN A
52 SOUTH BROAD STREET
NORWICH, NY 13815		   X     President & CEO NBT Bancorp  

Signatures

By: F. Sheldon Prentice, Power of Attorney For: Martin A. Dietrich 02/16/2016
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1) Shares acquired under NBT Bancorp Dividend Reinvestment Plan during period of 1/1/2015 to 12/31/2015.
(2) Shares were purchased from 1/1/2015 through 12/31/2015 through NBT Bancorp Inc. 401k Plan.
(3) Pursuant to NBT Bancorp Inc. Omnibus Stock Option Agreement the grant vests 40% for first year, 20% annually for following years.
(4) Pursuant to NBT Bancorp Inc. 1993 Stock Option Plan grant vests 40% for first year, 20% annually for following years.
(5) Pursuant to NBT Bancorp Inc. 1993 Stock Option Plan reload grant vests 100% two years after date of its grant.

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