Sec Form 4 Filing - McKenney Richard P @ Unum Group - 2017-02-23

FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP 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 McKenney Richard P 2. Issuer Name and Ticker or Trading Symbol Unum Group [ UNM] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner X __ Officer (give title below) _____ Other (specify below) President and CEO (Last) (First) (Middle) 1 FOUNTAIN SQUARE 3. Date of Earliest Transaction (MM/DD/YY) 02/23/2017 (Street) CHATTANOOGA, TN37402 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (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 (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Common Stock 02/23/2017 F 13,056 ( 1 ) D $ 48.65 272,520 ( 2 ) D Common Stock 02/24/2017 M 26,048 A $ 26.29 298,568 ( 3 ) D Common Stock 02/24/2017 F 19,127 ( 4 ) D $ 48.48 279,441 ( 5 ) D Common Stock 02/24/2017 M 34,270 A $ 23.35 313,711 ( 6 ) D Common Stock 02/24/2017 F 23,958 ( 4 ) D $ 48.48 289,753 ( 7 ) D Common Stock 02/24/2017 F 6,417 ( 8 ) D $ 48.48 283,336 ( 9 ) D Common Stock 02/25/2017 F 5,529 ( 10 ) D $ 48.48 277,807 ( 11 ) D

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 (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 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 (MM/DD/YY) 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 Following Reported Transaction(s) (Instr. 4) 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4) Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares Employee Stock Option (right to buy) $ 26.29 02/24/2017 M 26,048 ( 12 ) 02/22/2019 Common Stock 26,048 $ 0 0 D Employee Stock Option (right to buy) $ 23.35 02/24/2017 M 34,270 ( 13 ) 02/21/2020 Common Stock 34,270 $ 0 0 D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other McKenney Richard P 1 FOUNTAIN SQUARE CHATTANOOGA, TN37402 President and CEO Signatures /s/ Jullienne, J. Paul, Attorney-in-Fact 02/27/2017 Signature of Reporting Person Date

Explanation of Responses:

( 1 )Shares withheld to satisfy tax withholding obligation applicable to the vesting of 31,120.806 stock-settled RSUs (as defined in footnote (2) below). ( 2 )Includes 106,960 restricted stock units, which may be settled, on a 1-for-1 basis, only in shares of common stock ("stock-settled RSUs"), and 165,560 shares of common stock. Fractional amounts have been rounded to the nearest whole number. ( 3 )Includes 106,960 stock-settled RSUs and 191,608 shares of common stock. Fractional amounts have been rounded to the nearest whole number. ( 4 )Shares withheld for payment of exercise price and tax obligations incident to the exercise of stock options. ( 5 )Includes 106,960 stock-settled RSUs and 172,481 shares of common stock. Fractional amounts have been rounded to the nearest whole number. ( 6 )Includes 106,960 stock-settled RSUs and 206,751 shares of common stock. Fractional amounts have been rounded to the nearest whole number. ( 7 )Includes 106,960 stock-settled RSUs and 182,793 shares of common stock. Fractional amounts have been rounded to the nearest whole number. ( 8 )Shares withheld to satisfy tax withholding obligation applicable to the vesting of 15,296.315 stock-settled RSUs. ( 9 )Includes 91,664 stock-settled RSUs and 191,673 shares of common stock. Fractional amounts have been rounded to the nearest whole number. ( 10 )Shares withheld to satisfy tax withholding obligation applicable to the vesting of 13,179.175 stock-settled RSUs. ( 11 )Includes 78,485 stock-settled RSUs and 199,323 shares of common stock. Fractional amounts have been rounded to the nearest whole number. ( 12 )The options vest in three equal annual installments beginning on February 22, 2012. ( 13 )The options vest in three equal annual installments beginning on February 21, 2013.

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* 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).

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