HAMILTON, Bermuda, April 27, 2012 /PRNewswire/ -- OneBeacon Insurance Group, Ltd. (NYSE: OB) today reported book value per share of $11.93, an increase of 5.0% for the first quarter, including dividends.

Said Mike Miller, CEO of OneBeacon, "We had a strong start to the year, reflecting excellent Specialty underwriting results and solid investment returns, partially offset by increased reserves in runoff. Our Specialty written premiums grew by 17% to $303 million, and we were pleased to see continued pricing momentum, along with favorable retention and new business trends. During the quarter we launched our newest specialty business -- OneBeacon Program Group -- and we closed the previously announced sale of AutoOne. We are optimistic about improving market conditions and will continue to look for new specialty opportunities."

For the first quarter, comprehensive income and net income were both $44 million, and operating income was $25 million, or $0.26 per share. Operating income is a non-GAAP financial measure which is explained later in this release.

In January 2012, OneBeacon completed the sale of its subsidiary, OneBeacon Holdings (Luxembourg) S.a r.l., to a subsidiary of White Mountains. As a result of completing the sale, OneBeacon recorded a $14 million gain as additional paid in capital, increasing OneBeacon's book value per share by $0.14.

Insurance Operations: The first quarter GAAP combined ratio was 93.6%, compared to 93.3% for the first quarter of 2011. Specialty Insurance Operations' GAAP combined ratio was 89.1% compared to 94.3% for the first quarter of last year, reflecting improved current accident year results. The first quarter of 2012 included 4 points of unfavorable loss reserve development compared to 2 points of favorable loss reserve development in the first quarter of last year. The loss reserve development in the current period was driven by 5 points of unfavorable development in the runoff business, including the impact of an adverse court ruling in Mississippi regarding a disputed assessment from an involuntary pool for Hurricane Katrina claims in 2005.

First quarter net written premiums for Specialty Insurance Operations were $303 million as compared to $258 million for the first quarter of 2011. This 17% increase reflects growth across the company's business units, with particularly strong contributions from OneBeacon Professional Insurance, OneBeacon Technology Insurance and OneBeacon Accident Group.

Consolidated Investment Results: OneBeacon's first quarter total return on invested assets was 1.7% compared to 1.4% for the first quarter of 2011. These results included net realized and unrealized investment gains of $30 million and net investment income of $15 million, compared to net realized and unrealized investment gains of $23 million and net investment income of $21 million for the first quarter of 2011. The average market value of invested assets was $2.7 billion in the first quarter as compared to $3.2 billion in the first quarter of 2011, reflecting the impact of the company's capital management activities.

Company to Host Webcast: OneBeacon will host its first quarter 2012 webcast for analysts and investors at 10:00 a.m. ET on Friday, April 27. A copy of the earnings release, the slide presentation to be referenced during the call and a financial supplement are available on the company's website: www.onebeacon.com. An audio playback of the teleconference will be available on the website shortly following the webcast.

About OneBeacon: OneBeacon Insurance Group, Ltd. is a Bermuda-domiciled holding company that is publicly traded on the New York Stock Exchange under the symbol "OB." OneBeacon's underwriting companies offer a range of specialty insurance products sold through independent agencies, regional and national brokers, wholesalers and managing general agencies. Each business is managed by an experienced team of specialty insurance professionals focused on a specific customer group or industry segment. OneBeacon's solutions target professional liability; ocean and inland marine; collector cars and boats; energy; entertainment, sports and leisure; excess property; environmental; group accident; programs; public entities; technology; and tuition refund. For further information about our products and services visit: www.onebeacon.com and to remain up to date on OneBeacon's news, follow us on Twitter @OneBeaconIns or visit our online newsroom: www.onebeacon.com/newsroom.


                                                                                   ONEBEACON INSURANCE GROUP, LTD.
                                                                                     CONSOLIDATED BALANCE SHEETS
                                                                                           ($ in millions)
                                                                                             (Unaudited)

                                                                                  March 31,                          December 31,              March 31,
                                                                                        2012                                 2011                         2011
                                                                                        ----                                 ----                         ----
     Assets
     Investment securities:
                    Fixed maturity
                    investments                                                    $1,831.9                                         $1,886.2                               $2,422.0
                    Short-term
                    investments                                                       306.1                                            320.0                                  244.8
                    Common equity
                    securities                                                        281.5                                            266.5                                  309.9
                    Convertible fixed
                    maturity
                    investments                                                        80.1                                             79.8                                   92.3
                   Other investments                                                  155.9                                            155.1                                  163.0
                                                                                      -----                                            -----                                  -----

                               Total
                               investments                                           2,655.5                                          2,707.6                                3,232.0
     Cash                                                                               87.0                                             54.9                                   32.6
      Reinsurance recoverable
      on unpaid losses                                                  2,109.0                                          2,167.5                                1,864.0
      Reinsurance recoverable
      on paid losses                                                       25.9                                             16.5                                   18.3
     Premiums receivable                                                  254.5                                            230.9                                  260.5
      Deferred acquisition
      costs                                                               117.9                                            123.5                                  112.0
     Ceded unearned premiums                                                 9.7                                             10.7                                   58.4
     Net deferred tax asset                                                82.1                                             93.6                                   90.5
     Investment income accrued                                                11.3                                             14.1                                   18.1
      Accounts receivable on
      unsettled investment
      sales                                                                 1.8                                              0.5                                   15.3
     Other assets                                                         273.8                                            269.2                                  293.9
     Assets held for sale (1)                                                   -                                            132.6                                                 -

                              Total assets                                          $5,628.5                                         $5,821.6                               $5,995.6
                                                                                    ========                                         ========                               ========

     Liabilities
      Loss and loss adjustment
      expense reserves                                                 $3,249.6                                         $3,358.6                               $3,224.7
     Unearned premiums                                                    557.9                                            528.0                                  586.5
     Debt                                                                              269.8                                            269.7                                  419.6
     Ceded reinsurance payable                                                22.4                                             23.4                                   90.4
      Accounts payable on
      unsettled investment
      purchases                                                            61.0                                             22.7                                   52.9
     Other liabilities                                                    315.1                                            397.7                                  350.5
      Liabilities held for sale
        (1)                                                                    -                                            107.6                                                 -

                               Total
                               liabilities                                           4,475.8                                          4,707.7                                4,724.6
                                                                                     -------                                          -------                                -------

      OneBeacon's common
      shareholders' equity and
      noncontrolling interests

      OneBeacon's common
      shareholders' equity:
                    Common shares and
                    paid-in surplus                                                 1,016.6                                          1,002.2                                1,000.6
                   Retained earnings                                                  132.5                                            108.5                                  250.3
                    Accumulated other
                    comprehensive
                    (loss) income,
                    after tax:
                               Other
                               comprehensive
                               income and loss
                               items                                                   (10.7)                                           (10.9)                                   0.4
                                                                                       -----                                            -----                                    ---

                                                 Total OneBeacon's common
                                                 shareholders' equity                                        1,138.4                                   1,099.8                       1,251.3

                                                Total noncontrolling interests                                  14.3                                      14.1                          19.7
                                                                                                                ----                                      ----                          ----
      Total OneBeacon's common
      shareholders' equity and
      noncontrolling interests                                             1,152.7                                          1,113.9                                1,271.0
                                                                        -------                                          -------                                -------

      Total liabilities,
      OneBeacon's common
      shareholders' equity and
      noncontrolling interests                                            $5,628.5                                         $5,821.6                               $5,995.6
                                          ===                          ========                                         ========                               ========

               (1)  Represents assets and liabilities being sold as part of the
                    AutoOne Transaction required to be presented separately in the
                    December 31, 2011 consolidated balance sheet. The AutoOne
                    Transaction closed on February 22, 2012.

                                                   ONEBEACON INSURANCE GROUP, LTD.
                                    CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME
                                               (in millions, except per share amounts)
                                                             (Unaudited)

                                                                                       Three Months Ended
                                                                                           March 31,
                                                                                      -------------------
                                                                                                     2012        2011
                                                                                                     ----        ----
     Revenues:
                            Earned
                            premiums                              $272.8                           $245.1
                            Net investment
                            income                                  14.7                             21.0
       Net realized
                            and
                            unrealized
                            investment
                            gains                                   29.8                             23.1
                            Net other
                            revenues                                 0.1                              0.8
                                                                     ---                              ---

                                                                               317.4                       290.0
                                             Total
                                             revenues

     Expenses:
                            Loss and loss
                            adjustment
                            expenses                               149.3                            130.4
                            Policy
                            acquisition
                            expenses                                57.4                             49.0
                            Other
                            underwriting
                            expenses                                48.8                             49.3
                            General and
                            administrative
                            expenses                                 2.7                              2.3
                            Interest
                            expense on
                            debt                                     4.1                              6.3

                                                                               262.3                       237.3
                                             Total
                                             expenses


      Pre-tax income
      from continuing
      operations                                     55.1                       52.7

                            Income tax
                            expense                                (10.4)                            (9.7)
                                                                   -----                             ----

      Net income from
      continuing
      operations                                     44.7                       43.0

       Loss from
                            discontinued
                            operations,
                            net of tax
                             (1)                                    (0.1)                            (0.7)

      Net income
      including
      noncontrolling
      interests                                      44.6                       42.3

       Less:  Net
                            income
                            attributable
                            to
                            noncontrolling
                            interests                               (0.6)                            (0.4)
                                                                    ----                             ----

      Net income
      attributable to
      OneBeacon's common
      shareholders                                   44.0                       41.9

       Change in
                            other
                            comprehensive
                            income and
                            loss items                               0.2                              0.1
                                                                     ---                              ---

      Comprehensive
      income
      attributable to
      OneBeacon's common
      shareholders                                  $44.2                      $42.0
                                                    =====                      =====

      Earnings (loss) per
      common share -
      basic and diluted
       Net income
                            from
                            continuing
                            operations
                            per share                              $0.47                            $0.46
       Loss from
                            discontinued
                            operations,
                            net of tax,
                            per share                              (0.00)                           (0.01)
       Net income
                            attributable
                            to
                            OneBeacon's
                            common
                            shareholders
                            per share                               0.46                             0.44

       Weighted
                            average
                            number of
                            common shares
                            outstanding
                             (2)                                    95.2                             94.4


                       (1)
                            Results for AutoOne are reported as
                            discontinued operations for all
                            periods presented.
                       (2)
       Weighted average common shares
                            outstanding includes the impact of
                            unvested restricted shares and also the
                            impact of repurchases of Class A common
                            shares made through the company's share
                            repurchase program.

                                                                 ONEBEACON INSURANCE GROUP, LTD.
                                                                 SEGMENT STATEMENTS OF OPERATIONS
                                                                         ($ in millions)
                                                                         (Unaudited)

     For the Three Months Ended March 31, 2012                                                                                                              Investing,
     -----------------------------------------
                                                                                                            Specialty                   Other                                    Financing
                                                                                                            Insurance                 Insurance                                and Corporate
                                                                                                            Operations                Operations                                 Operations               Total
                                                                                                           ----------                ----------                                 ----------               -----

                                    Earned premiums                                                $271.8                      $1.0                       $                 -                    $272.8
                                    Loss and loss adjustment expenses                              (136.5)                    (12.8)                                        -                    (149.3)
                                    Policy acquisition expenses                                     (58.2)                      0.8                                         -                     (57.4)
                                    Other underwriting expenses                                     (47.4)                     (1.4)                                        -                     (48.8)

                                                                        Underwriting income (loss)                     29.7                      (12.4)                                        -                17.3
                                                                                                                       ----                      -----                                       ---                ----

                                    Net investment income                                               -                         -                                      14.7                      14.7
                                    Net realized and unrealized
                                     investment gains                                                   -                         -                                      29.8                      29.8
                                    Net other revenues (expenses)                                     0.1                       0.2                                      (0.2)                      0.1
                                    General and administrative expenses                              (0.3)                        -                                      (2.4)                     (2.7)
                                    Interest expense on debt                                            -                         -                                      (4.1)                     (4.1)

                     Pre-tax income (loss)                                                         $29.5                    $(12.2)                                    $37.8                     $55.1
                                                                                                   =====                    ======                                     =====                     =====


     For the Three Months Ended March 31, 2011
     -----------------------------------------
                                                                                                                                                                                 Investing,
                                                                                                            Specialty                   Other                                    Financing
                                                                                                            Insurance                 Insurance                                and Corporate
                                                                                                            Operations                Operations                                 Operations               Total
                                                                                                           ----------                ----------                                 ----------               -----

                                    Earned premiums                                                $241.9                      $3.2                     $                   -                    $245.1
                                    Loss and loss adjustment expenses                              (132.6)                      2.2                                         -                    (130.4)
                                    Policy acquisition expenses                                     (49.2)                      0.2                                         -                     (49.0)
                                    Other underwriting expenses                                     (46.4)                     (2.9)                                        -                     (49.3)

                                                                        Underwriting income                            13.7                        2.7                                         -                16.4
                                                                                                                       ----                        ---                                       ---                ----

                                    Net investment income                                               -                         -                                      21.0                      21.0
                                    Net realized and unrealized
                                     investment gains                                                   -                         -                                      23.1                      23.1
                                    Net other revenues (expenses)                                     0.1                       0.9                                      (0.2)                      0.8
                                    General and administrative expenses                              (0.5)                        -                                      (1.8)                     (2.3)
                                    Interest expense on debt                                            -                         -                                      (6.3)                     (6.3)

                     Pre-tax income                                                                $13.3                      $3.6                                     $35.8                     $52.7
                                                                                                   =====                      ====                                     =====                     =====




                                                                                                                                                                                                   ONEBEACON INSURANCE GROUP, LTD.
                                                                                                                                                                                                   SUMMARY OF RATIOS AND PREMIUMS
                                                                                                                                                                                                           ($ in millions)
                                                                                                                                                                                                             (Unaudited)


         Three Months Ended March 31, 2012
                                                                                                                         MGA Business                                  Specialty Industries                              Specialty Products           Specialty Insurance Operations (1)      Other Insurance Operations (2) (3)        Consolidated Insurance Operations (3)
                                                                                                                       ------------                                  --------------------                              ------------------           ---------------------------------        ---------------------------------         ------------------------------------
         Net written premiums                                                                                                           $55.7                                              $110.3                                           $137.1                                  $303.1                                       $0.5                                    $303.6
         Earned premiums                                                                                                                $72.9                                               $98.7                                           $100.2                                  $271.8                                       $1.0                                    $272.8

         Ratios
              Loss and loss adjustment expenses                                                                                          42.5%                                               50.2%                                            55.9%                                   50.2%                                       n/m                                      54.7%
              Expense                                                                                                                    44.3%                                               38.2%                                            35.5%                                   38.9%                                       n/m                                      38.9%

                 GAAP combined                                                                                                           86.8%                                               88.4%                                            91.4%                                   89.1%                                       n/m                                      93.6%
         -------------                                                                                                                   ----                                                ----                                             ----                                    ----                                        ---                                      ----


         Three Months Ended March 31, 2011
                                                                                                                       MGA Business                                  Specialty Industries                              Specialty Products           Specialty Insurance Operations (1)      Other Insurance Operations (2) (3)        Consolidated Insurance Operations (3)
                                                                                                                       ------------                                  --------------------                              ------------------           ---------------------------------        ---------------------------------         ------------------------------------
         Net written premiums                                                                                                           $48.5                                               $85.6                                           $124.2                                  $258.3                                       $1.6                                    $259.9
         Earned premiums                                                                                                                $66.0                                               $80.9                                            $95.0                                  $241.9                                       $3.2                                    $245.1

         Ratios
              Loss and loss adjustment expenses                                                                                          45.3%                                               57.0%                                            59.6%                                   54.8%                                       n/m                                      53.2%
              Expense                                                                                                                    42.1%                                               42.4%                                            35.3%                                   39.5%                                       n/m                                      40.1%

                 GAAP combined                                                                                                           87.4%                                               99.4%                                            94.9%                                   94.3%                                       n/m                                      93.3%
         -------------                                                                                                                   ----                                                ----                                             ----                                    ----                                        ---                                      ----

     (1)  Within Specialty Insurance Operations, OneBeacon reports its businesses through three major underwriting units, representing an aggregation of its specialty
          lines businesses. MGA Business includes Collector Cars and Boats, A.W.G. Dewar and OneBeacon Entertainment. Also included in MGA Business is OneBeacon's newest
          specialty business, OneBeacon Program Group. Specialty Industries includes International Marine Underwriters, OneBeacon Technology Insurance, OneBeacon Accident
          Group, OneBeacon Government Risks and OneBeacon Energy Group. Specialty Products includes OneBeacon Professional Insurance, OneBeacon Property and Inland
          Marine, OneBeacon Specialty Property and OneBeacon Excess and Surplus.
     (2)  Other Insurance Operations includes the nonspecialty commercial lines business that was subject to the renewal rights agreement with The Hanover that began with
          January 1, 2010 effective dates and other run-off business. As Other Insurance Operations consists of business in run-off, GAAP ratios are not meaningful. For
          the three months ended March 31, 2012 and 2011, Other Insurance Operations reported an underwriting loss of $12.4 million and underwriting income of $2.7
          million, respectively.
     (3) Results for AutoOne are reported as discontinued operations in a single financial statement caption outside of underwriting results for all periods presented.

                                                                                                                                       ONEBEACON INSURANCE GROUP, LTD.
                                                                                                                                            BOOK VALUE PER SHARE
                                                                                                                                   (in millions, except per share amounts)
                                                                                                                                                 (Unaudited)

                                                                                                                                                                           March 31,   December 31,          March 31,
                                                                                                                                                                                 2012          2011                    2011
                                                                                                                                                                                 ----          ----                    ----
     Numerator
     OneBeacon's common shareholders' equity                                                                                                                                 $1,138.4               $1,099.8                $1,251.3

     Denominator
     Common shares outstanding (1)                                                                                                                                               95.4                   95.1                    94.4
                                                                                                                                                                                 ----                   ----                    ----

     Book value per share                                                                                                                                                      $11.93                 $11.56                  $13.26
                                                                                                                                                                               ======                 ======                  ======


     Change in book value per share, including dividends, in the quarter
       on an IRR basis (2)                                                                                                                                                        5.0%

      Growth in book value per share, including dividends, in the last twelve
      months
       on an IRR basis (3)                                                                                                                                                        4.2%


      (1)  Common shares outstanding includes the impact of unvested restricted shares and also the impact of repurchases of Class
      A common shares made through the company's share repurchase program.

      (2)  Internal rate of return (IRR) calculated based on beginning book value per share, dividends paid and ending book value
      per share. Includes a quarterly dividend of $0.21 per share.

      (3)  IRR calculated based on beginning book value per share, dividends paid and ending book value per share. Includes
      dividends of $0.84 per share (a quarterly dividend of $0.21 per share) and a special dividend of $1.00 per share paid in
      June 2011.


                                                                                                               ONEBEACON INSURANCE GROUP, LTD.
                                                                                                    COMPREHENSIVE INCOME, NET INCOME AND OPERATING INCOME
                                                                                                           (in millions, except per share amounts)
                                                                                                                         (Unaudited)
                                                                                                                                                                                       Twelve Months Ended
                                                                                                                                                                                            March 31,
                                                                                                                                                                                            ---------
                                                                                                     Three Months Ended March 31,
                                                                                                     ----------------------------
                                                                                                                                2012                                             2011                       2012
                                                                                                                                ----                                             ----                       ----

    Comprehensive income attributable
     to OneBeacon's common shareholders                                                                                        $44.2                                            $42.0                      $46.1
                                                                                                                               =====                                            =====                      =====


    Net income attributable to
     OneBeacon's common shareholders                                                                                           $44.0                                            $41.9                      $57.2

    Weighted average common shares
     outstanding (1)                                                                                                            95.2                                             94.4                       95.0
                                                                                                                                ----                                             ----                       ----

    Net income attributable to
     OneBeacon's common shareholders
     per share                                                                                                                 $0.46                                            $0.44                      $0.60
                                                                                                                               =====                                            =====                      =====


    Net income attributable to
     OneBeacon's common shareholders                                                                                           $44.0                                            $41.9                      $57.2
    Less:
    Net realized and unrealized
     investment gains and losses                                                                                               (29.8)                                           (23.1)                     (17.3)
    Tax effect on net realized and
     unrealized investment gains and
     losses                                                                                                                     10.4                                              8.1                        6.0
                                                                                                                                ----                                              ---                        ---
      Operating income (2)                                                                                                     $24.6                                            $26.9                      $45.9
                                                                                                                               =====                                            =====                      =====

    Weighted average common shares
     outstanding (1)                                                                                                            95.2                                             94.4                       95.0
                                                                                                                                ----                                             ----                       ----

    Operating income per share (2)                                                                                             $0.26                                            $0.28                      $0.48
                                                                                                                               =====                                            =====                      =====


    (1) Weighted average common shares outstanding includes the impact of unvested restricted shares and also the impact of repurchases of Class A common shares made through the
     company's share repurchase program.

    (2) Represents a non-GAAP financial measure. See discussion of Non-GAAP financial measures.


                                                                        ONEBEACON INSURANCE GROUP, LTD.
                                                             COMPREHENSIVE AND OPERATING RETURNS ON AVERAGE EQUITY
                                                                                ($ in millions)
                                                                                  (Unaudited)



                                                                                                                                                                                                                                                 Twelve Months Ended
                                                                                                                                                                                                                                                    March 31, 2012
                                                                                                                                                                                                                                                    --------------
     Numerator:
     [A]             Comprehensive income attributable to OneBeacon's common shareholders                                                                                                                                                 $46.1

     [B]             Operating income (1)                                                                                                                                                                                                 $45.9

                                                                                                                                                                                               As of                         As of
                                                                                                                                                                                          March 31, 2012                March 31, 2011                 Average
                                                                                                                                                                                          --------------                --------------                 -------
     Denominator:
     [C]             OneBeacon's common shareholders' equity                                                                                                                    $1,138.4                      $1,251.3                 $1,194.9

                     Less:
                      Net unrealized gains and losses and net foreign currency gains and losses on
                      investments (2)                                                                                                                                             (111.9)                       (154.2)
                      Tax effect on net unrealized gains and losses and net foreign currency gains and
                      losses on investments                                                                                                                                39.2                          54.0
                     Accumulated OCI/L, after-tax                                                                                                                                   10.7                          (0.4)
                                                                                                                                                                                    ----                          ----


     [D]              Adjusted OneBeacon's common shareholders' equity excluding net unrealized
                      investment gains and losses, after tax, and AOCI/L (1)                                                                                                    $1,076.4                      $1,150.7                 $1,113.6
                                                                                                                                                                                --------                      --------


     Returns:
                      Comprehensive return on average OneBeacon's common shareholders' equity  [ A /
                      C ]                                                                                                                                                                                                                   3.9%

                      Operating return on average adjusted OneBeacon's common shareholders' equity excluding net unrealized investment gains and
                      losses, after tax, and AOCI/L [ B / D ]                                                                                                                        4.1%

                 (1)  Represents a non-GAAP financial measure. See discussion of Non-GAAP
                      financial measures.
                 (2)  Net unrealized gains and losses and net foreign currency gains and losses on investments as of March 31, 2012 and 2011 includes unrealized gains and
                      losses on investments held as well as deferred gains and losses relating to sales of investments to entities under common control.

Discussion of Non-GAAP Financial Measures

This earnings release includes non-GAAP financial measures that have been reconciled to their most comparable GAAP financial measures. OneBeacon believes these measures to be useful supplements to the comparable GAAP measures in evaluating OneBeacon's financial performance.

Operating income is a non-GAAP financial measure that excludes net realized and unrealized investment gains or losses and the related tax effects from net income attributable to OneBeacon's common shareholders. OneBeacon believes that this non-GAAP financial measure provides a useful alternative picture of the underlying operating activities of the company to the GAAP measure of net income attributable to OneBeacon's common shareholders, as it removes variability in the timing of investment gains and losses which may be heavily influenced by investment market conditions. Although key to the company's overall financial performance, OneBeacon believes that net realized and unrealized investment gains or losses are largely independent of the underwriting decision-making process.

Operating income per share is calculated by dividing operating income (a non-GAAP financial measure described above) by the weighted average number of common shares outstanding. Management believes that operating income per share is a useful alternative picture of the underlying operating activities of the company as it removes variability in the timing of investment gains and losses which may be heavily influenced by investment market conditions. Net income attributable to OneBeacon's common shareholders per share is the most directly comparable GAAP measure.

Adjusted OneBeacon's common shareholders' equity excluding net unrealized investment gains and losses, after-tax, and accumulated other comprehensive income/loss (AOCI/L), the average of which is used in calculating operating returns, is derived by excluding net unrealized gains and losses and net foreign currency gains and losses on investments, after tax, and accumulated other comprehensive income or loss (AOCI/L), after tax, from OneBeacon's common shareholders' equity. For the reasons described above, OneBeacon believes that it is appropriate to remove the variability in net unrealized gains and losses and net foreign currency gains and losses on investments and other comprehensive income and loss items when analyzing certain performance measures.

Safe Harbor Statement under the Private Securities Litigation Reform Act of 1995
This press release may contain "forward-looking statements" within the meaning of Section 27A of the Securities Act of 1933 and Section 21E of the Securities Exchange Act of 1934. All statements, other than statements of historical facts, included or referenced in this release which address activities, events or developments which we expect or anticipate will or may occur in the future are forward-looking statements. The words "will," "believe," "intend," "expect," "anticipate," "project," "estimate," "predict" and similar expressions are also intended to identify forward-looking statements. These forward-looking statements include, among others, statements with respect to OneBeacon's:


    --  change in book value per share or return on equity;
    --  business strategy;
    --  financial and operating targets or plans;
    --  incurred loss and loss adjustment expenses and the adequacy of its loss
        and loss adjustment expense reserves and related reinsurance;
    --  projections of revenues, income (or loss), earnings (or loss) per share,
        dividends, market share or other financial forecasts;
    --  expansion and growth of our business and operations; and
    --  future capital expenditures.

These statements are based on certain assumptions and analyses made by OneBeacon in light of its experience and perception of historical trends, current conditions and expected future developments, as well as other factors believed to be appropriate in the circumstances. However, whether actual results and developments will conform to our expectations and predictions is subject to a number of risks and uncertainties that could cause actual results to differ materially from expectations, including:


    --  claims arising from catastrophic events, such as hurricanes, windstorms,
        earthquakes, floods, or terrorist attacks;
    --  recorded loss and loss adjustment expense reserves subsequently proving
        to have been inadequate;
    --  the continued availability and cost of reinsurance coverage;
    --  the continued availability of capital and financing;
    --  general economic, market or business conditions;
    --  business opportunities (or lack thereof) that may be presented to it and
        pursued;
    --  competitive forces, including the conduct of other property and casualty
        insurers and agents;
    --  changes in domestic or foreign laws or regulations, or their
        interpretation, applicable to OneBeacon, its competitors, its agents or
        its customers;
    --  an economic downturn or other economic conditions adversely affecting
        its financial position including stock market volatility;
    --  actions taken by ratings agencies from time to time, such as financial
        strength or credit ratings downgrades or placing ratings on negative
        watch;
    --  the risks that are described from time to time in OneBeacon's filings
        with the Securities and Exchange Commission, including but not limited
        to OneBeacon's Annual Report on the Form 10-K for the fiscal year ended
        December 31, 2011 filed February 28, 2012.

Consequently, all of the forward-looking statements made in this press release are qualified by these cautionary statements, and there can be no assurance that the actual results or developments anticipated by OneBeacon will be realized or, even if substantially realized, that they will have the expected consequences to, or effects on, OneBeacon or its business or operations. OneBeacon assumes no obligation to update publicly any such forward-looking statements, whether as a result of new information, future events or otherwise.

Website: www.onebeacon.com

SOURCE OneBeacon Insurance Group, Ltd.