AMENDMENT TO STOCK PURCHASE AGREEMENT

This Amendment (this “Amendment”), dated as of October 25, 2013, is made among OneBeacon Insurance Group LLC (“Seller”), Trebuchet US Holdings, Inc. (“Purchaser”), OneBeacon Insurance Group, Ltd. (“Seller Parent”) and Armour Group Holdings Limited (“Purchaser Parent”). Capitalized terms used but not defined in this Amendment have the meanings set forth in the Agreement (as defined below).

WHEREAS, Seller, Purchaser, Seller Parent and Purchaser Parent are parties to that certain Stock Purchase Agreement dated as of October 17, 2012, as amended or otherwise modified prior to the date hereof (the “Agreement”); and

WHEREAS, the parties desire to amend the Agreement as set forth in this Amendment in order to extend the Termination Date.

NOW, THEREFORE, in consideration of the premises herein contained, and for other good and valuable consideration, the receipt of which is hereby acknowledged, the parties hereto hereby agree as follows:

1.     Amendments to Section 8.1 of Agreement Re: Termination Date. Subsection (d) of Section 8.1 of the Agreement is hereby amended by deleting “December 31, 2013” therein and replacing such date with “July 31, 2014.”

2.    Counterparts. This Amendment may be executed in one or more counterparts, each of which will be deemed to constitute an original, but all of which shall constitute one and the same agreement, and may be delivered by facsimile or other electronic means intended to preserve the original graphic or pictorial appearance of a document.

3.    Governing Law. This Amendment and its enforcement will be governed by, and interpreted in accordance with, the laws of the State of New York applicable to agreements made and to be performed entirely within such state without regard to the conflicts of law provisions thereof.

4.    Submission to Jurisdiction. Each party to this Amendment hereby submits to the exclusive jurisdiction of (a) the United States District Court for the Southern District of New York sitting in the Borough of Manhattan or (b) if such court does not have jurisdiction, any state court located in the Borough of Manhattan, including in the case of subclauses (a) and (b) above, any appellate courts therefrom (the “New York Courts”) for any dispute arising out of or relating to this Amendment or the breach, termination or validity hereof or any transactions contemplated by this Amendment. Each party to this Amendment hereby irrevocably and unconditionally waives, to the fullest extent permitted by Law, any objection that it may now or hereafter have to the laying of the venue of any such proceedings brought in such court. Each of the parties hereto irrevocably and unconditionally waives and agrees not to plead or claim in any such court (i) that

it is not personally subject to the jurisdiction of the New York Courts for any reason other than the failure to serve process in accordance with applicable Law, (ii) that it or its property is exempt or immune from jurisdiction of the New York Courts or from any legal process commenced in the New York Courts (whether through service of notice, attachment prior to judgment, attachment in aid of execution of judgment, execution of judgment or otherwise), and (iii) to the fullest extent permitted by applicable Law that (A) the suit, action or proceeding in the New York Courts is brought in an inconvenient forum, (B) the venue of such suit, action or proceeding is improper and (C) this Amendment, or the subject matter hereof, may not be enforced in or by the New York Courts.

5.    WAIVER OF JURY TRIAL. EACH PARTY HERETO ACKNOWLEDGES AND AGREES THAT ANY CONTROVERSY WHICH MAY ARISE UNDER THIS AMENDMENT IS LIKELY TO INVOLVE COMPLICATED AND DIFFICULT ISSUES AND, THEREFORE, EACH SUCH PARTY HEREBY IRREVOCABLY AND UNCONDITIONALLY WAIVES ANY RIGHT SUCH PARTY MAY HAVE TO A TRIAL BY JURY FOR ANY DISPUTE ARISING OUT OF OR RELATING TO THIS AMENDMENT OR THE BREACH, TERMINATION OR VALIDITY HEREOF OR ANY TRANSACTIONS CONTEMPLATED BY THIS AMENDMENT. EACH PARTY HERETO CERTIFIES AND ACKNOWLEDGES THAT (A) NEITHER THE OTHER PARTY HERETO NOR ITS REPRESENTATIVES, AGENTS OR ATTORNEYS HAVE REPRESENTED, EXPRESSLY OR OTHERWISE, THAT SUCH OTHER PARTY WOULD NOT, IN THE EVENT OF LITIGATION, SEEK TO ENFORCE THE FOREGOING WAIVER, (B) EACH PARTY HERETO UNDERSTANDS AND HAS CONSIDERED THE IMPLICATIONS OF THIS WAIVER, (C) EACH PARTY HERETO MAKES THIS WAIVER VOLUNTARILY AND (D) EACH PARTY HERETO HAS BEEN INDUCED TO ENTER INTO THIS AMENDMENT BY, AMONG OTHER THINGS, THE MUTUAL WAIVERS AND CERTIFICATIONS OF THIS SECTION 5. ANY PARTY HERETO MAY FILE AN ORIGINAL COUNTERPART OR A COPY OF THIS AMENDMENT WITH ANY COURT AS WRITTEN EVIDENCE OF THE CONSENT OF THE PARTIES HERETO TO THE WAIVER OF THEIR RIGHT TO TRIAL BY JURY.

IN WITNESS WHEREOF, the parties hereto have duly executed this Amendment as of the day and year first above written.

By:     s/T. Michael Miller        

Name:    T. Michael Miller

Title:    Chairman of the Board, President

and Chief Executive Officer

By:     s/Pauline Richards        

Name:    Pauline Richards

Title:    Secretary / Treasurer

By:     s/T. Michael Miller        

Name:    T. Michael Miller

Title:    President and Chief Executive Officer

By:     s/Pauline Richards        

Name:    Pauline Richards

Title:    Chief Operating Officer