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 *
TREACY JOHN C
  2. Issuer Name and Ticker or Trading Symbol
OneBeacon Insurance Group, Ltd. [OB]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director _____ 10% Owner
_____ Officer (give title below) _____ Other (specify below)
SVP & Chief Accounting Officer
(Last)
(First)
(Middle)
605 HIGHWAY 169 NORTH SUITE 800
3. Date of Earliest Transaction (Month/Day/Year)
09/28/2017
(Street)

PLYMOUTH, MN 55441
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
Class A Common Shares 09/28/2017   D   5,638 D $ 18.1 (1) 0 D  
Class A Common Shares 09/28/2017   D   1,356 D $ 18.1 (2) 0 I in 401(k) 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 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
Phantom Stock Units (3) 09/28/2017   D     19,853   (3)   (3) Class A Common Shares 19,853 $ 18.1 (3) 0 D  

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
TREACY JOHN C
605 HIGHWAY 169 NORTH SUITE 800
PLYMOUTH, MN 55441
      SVP & Chief Accounting Officer  

Signatures

 /s/ Sarah A. Kolar, Attorney-in-Fact   09/28/2017
**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) Disposition in connection with the merger (the "Merger") between Intact Acquisition Co. Ltd. and OneBeacon Insurance Group, Ltd. ("OneBeacon"), exempt pursuant to Rule 16b-3, in which each outstanding Class A common share of OneBeacon ("Class A Share") was converted into the right to receive an amount in cash equal to $18.10 per share.
(2) Disposition in connection with the Merger, exempt pursuant to Rule 16b-3, in which each outstanding Class A Share was converted into the right to receive an amount in cash equal to $18.10 per share.
(3) In connection with the Merger, each outstanding phantom stock unit of OneBeacon was converted into the right to receive an amount in cash equal to the product of (i) the sum of $18.10 plus any accrued dividend equivalents in respect of a Class A Share subject to such phantom stock unit, multiplied by (ii) the number of Class A Shares subject to such phantom stock unit immediately prior to the effective time of the Merger; such cash amount shall continue to be subject to service-based vesting conditions.

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