Ownership Submission
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 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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(Print or Type Responses)
1. Name and Address of Reporting Person *
Welzenbach Mark Joseph
   2. Issuer Name and Ticker or Trading Symbol
HANOVER INSURANCE GROUP, INC. [THG] 		5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director _____ 10% Owner
__X__ Officer (give title below) _____ Other (specify below)
Executive Vice President
(Last)
(First)
(Middle)
C/O THE HANOVER INSURANCE GROUP, INC., 440 LINCOLN STREET		 3. Date of Earliest Transaction (Month/Day/Year)
05/04/2018
(Street)

WORCESTER, MA 01653		 4. If Amendment, Date Original Filed(Month/Day/Year)
 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 (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 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 05/04/2018   M   4,800 A $ 70.24 30,213 D  
Common Stock 05/04/2018   S   4,800 D $ 115.5867 (1) 25,413 D  
Common Stock 05/04/2018   M   4,723 A $ 82.74 30,136 D  
Common Stock 05/04/2018   S   4,723 D $ 115.5873 (2) 25,413 D  
Common Stock 05/04/2018   M   5,710 A $ 91.19 31,123 D  
Common Stock 05/04/2018   S   5,710 D $ 115.589 (3) 25,413 D  

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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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 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
Common Stock Option (right to buy) $ 70.24 05/04/2018   M     4,800   (4) 02/27/2025 Common Stock 4,800 $ 0 0 D  
Common Stock Option (right to buy) $ 82.74 05/04/2018   M     4,723   (5) 02/23/2026 Common Stock 4,723 $ 0 4,724 D  
Common Stock Option (right to buy) $ 91.19 05/04/2018   M     5,710   (6) 02/24/2027 Common Stock 5,710 $ 0 11,420 D  

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
Welzenbach Mark Joseph
C/O THE HANOVER INSURANCE GROUP, INC.
440 LINCOLN STREET
WORCESTER, MA 01653		       Executive Vice President  

Signatures

 /s/ Matthew R. Frascella pursuant to Confirming Statement   05/08/2018
**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) The price reported in Column 4 is a weighted average price. These shares were sold in multiple prices ranging from $115.32 to $116.15, inclusive. The Reporting Person undertakes to provide The Hanover Insurance Group, Inc. ("THG"), any security holder of THG, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the range set forth above.
(2) The price reported in Column 4 is a weighted average price. These shares were sold in multiple prices ranging from $115.36 to $116.12, inclusive. The Reporting Person undertakes to provide THG, any security holder of THG, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the range set forth above.
(3) The price reported in Column 4 is a weighted average price. These shares were sold in multiple prices ranging from $115.32 to $116.14, inclusive. The Reporting Person undertakes to provide THG, any security holder of THG, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the range set forth above.
(4) The option, representing the right to purchase a total of 14,400 shares, vested 1/3 on each of 2/27/16, 2/27/17 and 2/27/18.
(5) The option, representing the right to purchase a total of 14,170 shares, vested 1/3 on each of 2/23/17 and 2/23/18, and the remaining 1/3 will vest on 2/23/19.
(6) The option, representing the right to purchase a total of 17,130 shares, vested 1/3 on 2/24/18, and 1/3 will vest on each of 2/24/19 and 2/24/20.

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