HAMILTON, Bermuda, Oct. 30, 2012 /PRNewswire/ -- OneBeacon Insurance Group, Ltd. (NYSE: OB) today reported book value per share of $10.99, a decrease of 5.6% for the third quarter and an increase of 0.5% through nine months, including dividends.

Said OneBeacon CEO Mike Miller, "The big news of the quarter was the agreement to sell the runoff business. This is the final step in our transformation into a pure Specialty company. The loss on sale is in line with the economics of running off those liabilities over time. Our solid Specialty underwriting results and strong premium growth for the quarter and first nine months of 2012 are tangible evidence supporting our strategy. We are well positioned to generate strong returns and accelerate the growth in the value of our company going forward."

For the third quarter, the company reported a $64 million comprehensive loss, a $62 million net loss, and an operating loss of $88 million, or ($0.92) per share. For the nine months ended September 30, 2012, the comprehensive loss was $8 million, the net loss was $6 million and the operating loss was $44 million, or ($0.46) per share. Operating loss 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.

On October 18, OneBeacon announced its agreement to sell its runoff business to an affiliate of Armour Group Holdings Limited. During the third quarter of 2012, OneBeacon recorded an after tax charge of $101 million related to the transaction, including a $92 million after tax estimated loss on sale and a $9 million after tax charge related to an adjustment to the discount rate applied to the workers compensation loss reserves being transferred as part of the transaction. The company also recorded a $6 million after tax underwriting loss on discontinued operations related primarily to adverse prior year loss reserve development on a legacy assumed reinsurance treaty. As a result of the transaction, results for the runoff business are reported as discontinued operations for all periods presented, and its assets and liabilities are reported as of September 30, 2012 as held for sale within OneBeacon's GAAP financial statements. The sale is expected to close in the second half of 2013, subject to regulatory approval.

The company also recently announced its definitive agreement to terminate its exclusive underwriting arrangement with the Hagerty Insurance Agency and to sell the company's wholly owned subsidiary, Essentia Insurance Company, which writes the Hagerty collector car and boat business, to Markel Corporation. The sale is expected to close in the first quarter of 2013, subject to regulatory approval. OneBeacon anticipates recording a $23 million pre-tax gain on the sale ($15 million after tax) upon closing the transaction. The termination of the agency agreement will be effective as of the close date of the Essentia sale.

Insurance Operations: The GAAP combined ratio was 94.8% in the third quarter, compared to 94.3% for the third quarter of 2011, and 92.7% through the nine months ended September 30, 2012 compared to 94.5% for the first nine months of 2011. The third quarter 2012 GAAP combined ratio reflected improvement in the current accident year loss ratio driven by lower catastrophes, offset by lower favorable prior accident year loss reserve development and higher expenses due to a reduction in estimated incentive costs recorded in the third quarter of 2011. The GAAP combined ratio for the first nine months of 2012 reflected improvement in the current accident year loss ratio driven by lower catastrophes, partially offset by lower favorable prior accident year loss reserve development and slightly higher expenses. Catastrophe losses were 2 points in both the third quarter and first nine months of 2012 compared to 5 points in the comparable periods of last year. Favorable loss reserve development was 1 point in both the third quarter and the first nine months of 2012 compared to 2 points in the comparable periods of 2011.

Net written premiums were $335 million for the third quarter and $930 million through nine months of 2012, an increase of 13% over the comparable periods last year. A change in the method of estimating written premiums associated with the A.W.G. Dewar tuition reimbursement insurance product resulted in approximately $9 million in net written premiums being recorded in the third quarter of 2012 that under the prior method, would have been recorded in the fourth quarter. Excluding the impact of the change in estimated tuition reimbursement premiums, total net written premiums grew by 9% for the quarter and 12% through nine months. That growth reflected strong new business results from a number of the Specialty businesses, particularly OneBeacon Professional Insurance and OneBeacon Government Risks.

Consolidated Investment Results: OneBeacon's third quarter total pre-tax return on average invested assets was 2.0% compared to -1.0% for the third quarter of 2011. These returns included net realized and unrealized investment gains of $40 million and net investment income of $13 million, compared to net realized and unrealized investment losses of $47 million and net investment income of $16 million for the third quarter of 2011.

Through the first nine months of the year, total pre-tax return on average invested assets was 3.9% compared to 1.6% through September 30, 2011. These returns included net realized and unrealized investment gains of $58 million and net investment income of $42 million, compared to net realized and unrealized investment losses of $13 million and net investment income of $56 million through the first nine months of 2011.

Company to Host Webcast: OneBeacon will host its third quarter 2012 webcast for analysts and investors at 10:00 a.m. ET on Tuesday, October 30. 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; entertainment, sports and leisure; excess property; environmental; group accident; programs; public entities; commercial surety; 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)

                                                                                                                                                                                                                                                       September30,          December 31,          September 30,
                                                                                                                                                                                                                                                               2012                  2011                        2011
                                                                                                                                                                                                                                                               ----                  ----                        ----
     Assets
     Investment securities:
                                       Fixed maturity investments                                                                                                                                                                           $1,474.1                            $1,886.2                              $2,019.3
                                       Short-term investments                                                                                                                                                                                  274.1                               320.0                                 185.8
                                       Common equity securities                                                                                                                                                                                295.3                               266.5                                 244.5
                                       Convertible fixed maturity investments                                                                                                                                                                   72.6                                79.8                                  80.9
                                       Other investments                                                                                                                                                                                       156.9                               155.1                                 157.1
                                                                                                                                                                                                                                               -----                               -----                                 -----

                                                                              Total investments                                                                                                                                               2,273.0                             2,707.6                               2,687.6
     Cash                                                                                                                                                                                                                                                      32.0                           54.9                                 63.0
     Reinsurance recoverable on unpaid losses                                                                                                                                                                                      41.3                              2,167.5                                 2,239.1
     Reinsurance recoverable on paid losses                                                                                                                                                                                         2.0                                 16.5                                    13.7
     Premiums receivable                                                                                                                                                                                                          256.6                                230.9                                   243.7
     Deferred acquisition costs                                                                                                                                                                                                   132.5                                123.5                                   129.6
     Ceded unearned premiums                                                                                                                                                                                                       11.3                                 10.7                                    11.5
     Net deferred tax asset                                                                                                                                                                                                       129.7                                 93.6                                   122.2
     Investment income accrued                                                                                                                                                                                                     10.3                                 14.1                                    13.3
     Accounts receivable on unsettled investment sales                                                                                                                                                                             61.9                                  0.5                                    18.1
     Other assets                                                                                                                                                                                                                              255.7                               269.2                                 260.3
     Assets held for sale (1) (2)                                                                                                                                                                                               2,388.2                                132.6                                   123.2
                                                                                                                                                                                                                                -------                                -----                                   -----

                                                                              Total assets                                                                                                                                                   $5,594.5                            $5,821.6                              $5,925.3
                                                                                                                                                                                                                                             ========                            ========                              ========

     Liabilities
     Loss and loss adjustment expense reserves                                                                                                                                                                                   $911.6                             $3,358.6                                $3,458.9
     Unearned premiums                                                                                                                                                                                                            610.7                                528.0                                   559.4
     Debt                                                                                                                                                                                                                                                     269.8                          269.7                                269.7
     Ceded reinsurance payable                                                                                                                                                                                                      2.9                                 23.4                                    24.3
     Accounts payable on unsettled investment purchases                                                                                                                                                                            15.1                                 22.7                                    18.6
     Other liabilities                                                                                                                                                                                                                         332.7                               397.7                                 381.8
     Liabilities held for sale (1) (2)                                                                                                                                                                                          2,388.2                                107.6                                    98.2
                                                                                                                                                                                                                                -------                                -----                                    ----

                                                                              Total liabilities                                                                                                                                               4,531.0                             4,707.7                               4,810.9
                                                                                                                                                                                                                                              -------                             -------                               -------

     OneBeacon's common shareholders' equity and noncontrolling interests

     OneBeacon's common shareholders' equity:
                                       Common shares and paid-in surplus                                                                                                                                                                     1,018.4                             1,002.2                               1,001.7
                                       Retained earnings                                                                                                                                                                                        42.6                               108.5                                  97.9
                                       Accumulated other comprehensive (loss) income, after tax:
                                                                              Other comprehensive income and loss items                                                                                                                         (12.6)                              (10.9)                                  0.6
                                                                                                                                                                                                                                                -----                               -----                                   ---

                                                                                                                                                              Total OneBeacon's common shareholders' equity                                                 1,048.4                        1,099.8                              1,100.2

     Total noncontrolling interests                                                                                                                                                                                                15.1                                 14.1                                    14.2
                                                                                                                                                                                                                                   ----                                 ----                                    ----
                                                                              Total OneBeacon's common shareholders' equity and noncontrolling interests                                                                                      1,063.5                             1,113.9                               1,114.4
                                                                                                                                                                                                                                              -------                             -------                               -------

                                                                               Total liabilities, OneBeacon's common shareholders' equity and noncontrolling
                                                                               interests                                                                                                                                                     $5,594.5                            $5,821.6                              $5,925.3
                                                                                                                                                                                                                                             ========                            ========                              ========

                                   (1)  Represents assets and liabilities being sold as part of the sale of the Runoff Business, which are reported separately on the September 30, 2012
                                        consolidated balance sheet. The runoff business includes the results of the non-specialty commercial lines business and certain other run-off
                                        business, including asbestos and environmental reserves, as well as certain purchase accounting adjustments related to the OneBeacon Acquisition
                                        ("Runoff Business").

                                   (2)  Represents assets and liabilities being sold as part of the AutoOne transaction reported separately on the December 31, 2011 and September 30, 2011
                                        consolidated balance sheets. The AutoOne transaction closed in February 2012.

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

                                                                                                                                                                                                                                                 Three Months Ended September                 Nine Months Ended September
                                                                                                                                                                                                                                                              30,                                         30,
                                                                                                                                                                                                                                                -----------------------------                ----------------------------
                                                                                                                                                                                                                                                                          2012                                        2011         2012 2011
                                                                                                                                                                                                                                                                          ----                                        ----         ---- ----
     Revenues:
                          Earned premiums                                                                                                                                               $293.9                            $259.1                                       $846.0                                      $748.0
                          Net investment income                                                                                                                                           12.8                              16.1                                         41.5                                        55.8
                          Net realized and unrealized investment gains (losses)                                                                                   40.0                                           (47.4)                57.9                                          (13.3)
                          Net other expenses                                                                                                                                              (0.4)                                           -                                           (0.1)                                (12.2)
                                                                                                                                                                                          ----                                          ---                                           ----                                 -----

                                                                          Total revenues                                                                                                                           346.3                227.8                                          945.3                                 778.3
                                                                                                                                                                                                                   -----                -----                                          -----                                 -----
     Expenses:
                          Loss and loss adjustment expenses                                                                                                       164.7                                           149.7                452.5                                          421.3
                          Policy acquisition expenses                                                                                                              66.6                                            58.6                185.6                                          161.5
                          Other underwriting expenses                                                                                                              47.4                                            36.0                146.2                                          124.5
                          General and administrative expenses                                                                                                       4.4                                             2.5                  9.7                                            7.4
                          Interest expense on debt                                                                                                                                         4.0                               4.1                                         12.1                                        16.4
                                                                                                                                                                                           ---                               ---                                         ----                                        ----

                                                                          Total expenses                                                                                                                           287.1                250.9                                          806.1                                 731.1
                                                                                                                                                                                                                   -----                -----                                          -----                                 -----

     Pre-tax income (loss) from continuing operations                                                                                     59.2                                          (23.1)                            139.2                                         47.2

                          Income tax (expense) benefit                                                                                                            (14.2)                                           11.1                (28.1)                                          (1.9)
                                                                                                                                                                  -----                                            ----                -----                                           ----

     Net income (loss) from continuing operations                                                                                                                 45.0                                           (12.0)               111.1                                           45.3

                          Loss from discontinued operations, net of tax (1)                                                                                      (15.8)                                           (2.5)               (24.8)                                          (1.5)
                          Loss from sale of discontinued operations, net of tax                                                                                  (91.0)                                          (18.2)               (91.0)                                         (18.2)
                                                                                                                                                                 -----                                           -----                -----                                          -----

     Net (loss) income including noncontrolling interests                                                                                (61.8)                                         (32.7)                             (4.7)                                        25.6

                          Less:  Net income attributable to noncontrolling interests                                                                              (0.4)                                           (0.2)                (1.2)                                          (1.1)
                                                                                                                                                                  ----                                            ----                 ----                                           ----

     Net (loss) income attributable to OneBeacon's common shareholders                                                                   (62.2)                                         (32.9)                             (5.9)                                        24.5

                          Change in other comprehensive income and loss items                                                                                     (2.0)                                            0.2                 (1.7)                                           0.3
                                                                                                                                                                  ----                                             ---                 ----                                            ---

     Comprehensive (loss) income attributable to OneBeacon's common shareholders                                                                  $(64.2)                                        $(32.7)                            $(7.6)                                     $24.8
                                                                                                                                        ======                                         ======                             =====                                        =====

     Earnings (loss) per common share - basic and diluted
                          Net income (loss) from continuing operations per share                                                                                 $0.47                                          $(0.13)               $1.15                                          $0.46
                          Loss from discontinued operations, net of tax, per share                                                                               (0.17)                                          (0.03)               (0.27)                                         (0.02)
                          Loss from sale of discontinued operations, net of tax, per share                                                                       (0.95)                                          (0.19)               (0.95)                                         (0.19)
                           Net (loss) income attributable to OneBeacon's common shareholders per
                           share                                                                                                                                $(0.65)                                         $(0.35)              $(0.07)                                         $0.25

                          Weighted average number of common shares outstanding (2)                                                                                95.4                                            95.1                 95.3                                           94.7


                      (1)                          Results for Runoff Business and AutoOne are reported as discontinued operations for all periods presented. The AutoOne transaction
                                                   closed in February 2012.

                      (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 September 30, 2012                                                                                                                                                                                         Investing,
     ---------------------------------------------
                                                                                                                                                                             Specialty                                      Other                                 Financing
                                                                                                                                                                             Insurance                                    Insurance                             and Corporate
                                                                                                                                                                            Operations                                 Operations (1)                            Operations                Total (1)
                                                                                                                                                                            ----------                                 -------------                             ----------                --------

                                              Earned premiums                                                                                                       $293.9                    $                      -                    $                  -                     $293.9
                                              Loss and loss adjustment expenses                                                                                     (164.7)                                          -                                       -                     (164.7)
                                              Policy acquisition expenses                                                                                            (66.6)                                          -                                       -                      (66.6)
                                              Other underwriting expenses                                                                                            (47.4)                                          -                                       -                      (47.4)
                                                                                                                                                                     -----                                         ---                                     ---                      -----

                                                                                       Underwriting income                                                                             15.2                                             -                                       -                    15.2
                                                                                                                                                                                       ----                                           ---                                     ---                    ----

                                              Net investment income                                                                                                      -                                           -                                    12.8                       12.8
                                              Net realized and unrealized investment
                                               gains                                                                                                                     -                                           -                                    40.0                       40.0
                                              Net other (expense) revenues                                                                                            (1.1)                                        0.1                                     0.6                       (0.4)
                                              General and administrative expenses                                                                                     (0.6)                                          -                                    (3.8)                      (4.4)
                                              Interest expense on debt                                                                                                   -                                           -                                    (4.0)                      (4.0)
                                                                                                                                                                       ---                                         ---                                    ----                       ----

                             Pre-tax income                                                                                                                         $13.5                                        $0.1                                   $45.6                      $59.2
                                                                                                                                                                    =====                                        ====                                   =====                      =====


      For the Three Months Ended September 30, 2011
     ---------------------------------------------
                                                                                                                                                                                                                                                                 Investing,
                                                                                                                                                                             Specialty                                      Other                                 Financing
                                                                                                                                                                             Insurance                                    Insurance                             and Corporate
                                                                                                                                                                            Operations                                 Operations (1)                            Operations                Total (1)
                                                                                                                                                                            ----------                                 -------------                             ----------                --------

                                              Earned premiums                                                                                                       $259.1                   $                       -                    $                  -                     $259.1
                                              Loss and loss adjustment expenses                                                                                     (149.7)                                          -                                       -                     (149.7)
                                              Policy acquisition expenses                                                                                            (58.6)                                          -                                       -                      (58.6)
                                              Other underwriting expenses                                                                                            (36.0)                                          -                                       -                      (36.0)
                                                                                                                                                                     -----                                         ---                                     ---                      -----

                                                                                       Underwriting income                                                                             14.8                                             -                                       -                    14.8
                                                                                                                                                                                       ----                                           ---                                     ---                    ----

                                              Net investment income                                                                                                      -                                           -                                    16.1                       16.1
                                              Net realized and unrealized investment
                                               losses                                                                                                                    -                                           -                                   (47.4)                     (47.4)
                                              Net other revenues (expenses)                                                                                            0.3                                           -                                    (0.3)                         -
                                              General and administrative expenses                                                                                     (0.4)                                          -                                    (2.1)                      (2.5)
                                              Interest expense on debt                                                                                                   -                                           -                                    (4.1)                      (4.1)
                                                                                                                                                                       ---                                         ---                                    ----                       ----

                             Pre-tax income (loss)                                                                                                                  $14.7                   $                       -                                  $(37.8)                    $(23.1)
                                                                                                                                                                    =====                   =========================                                  ======                     ======

                        (1)  Other Insurance Operations includes the results of a reciprocal insurance exchange that is not actively writing any business.  Note as
                             a result of entering into a definitive agreement to sell the Runoff Business and the sale of the AutoOne business, results for the
                             Runoff Business and AutoOne are reported as discontinued operations in a single financial statement caption outside of underwriting
                             results for all periods presented.  The AutoOne transaction closed in February 2012.


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

      For the Nine Months Ended September 30, 2012                                                                                                                                                                         Investing,
     --------------------------------------------
                                                                                                                                                                           Specialty                    Other                                   Financing
                                                                                                                                                                           Insurance                  Insurance                               and Corporate
                                                                                                                                                                          Operations                Operations (1)                              Operations               Total (1)
                                                                                                                                                                          ----------                -------------                              ----------                --------

                                           Earned premiums                                                                                                        $846.0                  $      -                       $                 -                     $846.0
                                           Loss and loss adjustment expenses                                                                                      (452.5)                        -                                         -                     (452.5)
                                           Policy acquisition expenses                                                                                            (185.6)                        -                                         -                     (185.6)
                                           Other underwriting expenses                                                                                            (146.2)                        -                                         -                     (146.2)
                                                                                                                                                                  ------                       ---                                       ---                     ------

                                                                                    Underwriting income                                                                              61.7                             -                                       -                    61.7
                                                                                                                                                                                     ----                           ---                                     ---                    ----

                                           Net investment income                                                                                                       -                         -                                      41.5                       41.5
                                           Net realized and unrealized investment
                                            gains                                                                                                                      -                         -                                      57.9                       57.9
                                           Net other (expenses) revenues                                                                                            (0.9)                      0.3                                       0.5                       (0.1)
                                           General and administrative expenses                                                                                      (1.4)                        -                                      (8.3)                      (9.7)
                                           Interest expense on debt                                                                                                    -                         -                                     (12.1)                     (12.1)
                                                                                                                                                                     ---                       ---                                     -----                      -----

                           Pre-tax income                                                                                                                         $59.4                      $0.3                                     $79.5                     $139.2
                                                                                                                                                                  =====                      ====                                     =====                     ======


      For the Nine Months Ended September 30, 2011
     --------------------------------------------
                                                                                                                                                                                                                                                Investing,
                                                                                                                                                                           Specialty                    Other                                   Financing
                                                                                                                                                                           Insurance                  Insurance                               and Corporate
                                                                                                                                                                          Operations                Operations (1)                              Operations               Total (1)
                                                                                                                                                                          ----------                -------------                              ----------                --------

                                           Earned premiums                                                                                                        $747.9                      $0.1                       $                 -                     $748.0
                                           Loss and loss adjustment expenses                                                                                      (421.3)                        -                                         -                     (421.3)
                                           Policy acquisition expenses                                                                                            (161.3)                     (0.2)                                        -                     (161.5)
                                           Other underwriting expenses                                                                                            (124.4)                     (0.1)                                        -                     (124.5)
                                                                                                                                                                  ------                      ----                                       ---                     ------

                                                                                    Underwriting income (loss)                                                                       40.9                          (0.2)                                      -                    40.7
                                                                                                                                                                                     ----                          ----                                     ---                    ----

                                           Net investment income                                                                                                       -                         -                                      55.8                       55.8
                                           Net realized and unrealized investment
                                            losses                                                                                                                     -                         -                                     (13.3)                     (13.3)
                                           Net other revenues (expenses)                                                                                             0.5                         -                                     (12.7)                     (12.2)
                                           General and administrative expenses                                                                                      (1.3)                        -                                      (6.1)                      (7.4)
                                           Interest expense on debt                                                                                                    -                         -                                     (16.4)                     (16.4)
                                                                                                                                                                     ---                       ---                                     -----                      -----

                           Pre-tax income (loss)                                                                                                                  $40.1                     $(0.2)                                     $7.3                      $47.2
                                                                                                                                                                  =====                     =====                                      ====                      =====

                      (1)  Other Insurance Operations includes the results of a reciprocal insurance exchange that is not actively writing any business.  Note as
                           a result of entering into a definitive agreement to sell the Runoff Business and the sale of the AutoOne business, results for the
                           Runoff Business and AutoOne are reported as discontinued operations in a single financial statement caption outside of underwriting
                           results for all periods presented.  The AutoOne transaction closed in February 2012.

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


         Three Months Ended September 30, 2012
                                                                                                                                         MGA Business                                 Specialty Industries         Specialty Products         Specialty Insurance Operations (1)       Other Insurance Operations (2)              Consolidated Insurance Operations (2)
                                                                                                                                         ------------                                 --------------------         ------------------         ---------------------------------         -----------------------------              ------------------------------------
         Net written premiums                                                                                                                             $128.7                                           $106.6                      $99.9                                   $335.2            $                              -                                     $335.2
                                                                                                                                                                                                                                                                               ------            --------------------------------                                     ------
         Earned premiums                                                                                                                                   $78.4                                           $106.7                     $108.8                                   $293.9            $                              -                                     $293.9
                                                                                                                                                                                                                                                                               ------            --------------------------------                                     ------

         Ratios
              Loss and loss adjustment expenses                                                                                                             54.2%                                            55.4%                      57.9%                                    56.0%                                        n/m                                       56.0%
                                                                                                                                                                                                                                                                                 ----                                         ---                                       ----
              Expense                                                                                                                                       46.3%                                            36.6%                      35.7%                                    38.8%                                        n/m                                       38.8%
                                                                                                                                                            ----                                             ----                       ----                                     ----                                         ---                                       ----
                 GAAP combined                                                                                                                             100.5%                                            92.0%                      93.6%                                    94.8%                                        n/m                                       94.8%
         -------------                                                                                                                                     -----                                             ----                       ----                                     ----                                         ---                                       ----


         Three Months Ended September 30, 2011
                                                                                                                                         MGA Business                                 Specialty Industries         Specialty Products         Specialty Insurance Operations (1)       Other Insurance Operations (2)              Consolidated Insurance Operations (2)
                                                                                                                                         ------------                                 --------------------         ------------------         ---------------------------------         -----------------------------              ------------------------------------
         Net written premiums                                                                                                                             $110.5                                            $89.7                      $97.0                                   $297.2           $                               -                                     $297.2
                                                                                                                                                                                                                                                                               ------           ---------------------------------                                     ------
         Earned premiums                                                                                                                                   $69.8                                            $90.2                      $99.1                                   $259.1           $                               -                                     $259.1
                                                                                                                                                                                                                                                                               ------           ---------------------------------                                     ------

         Ratios
              Loss and loss adjustment expenses                                                                                                             53.5%                                            54.7%                      63.7%                                    57.8%                                        n/m                                       57.8%
                                                                                                                                                                                                                                                                                 ----                                         ---                                       ----
              Expense                                                                                                                                       44.3%                                            35.4%                      32.1%                                    36.5%                                        n/m                                       36.5%
                                                                                                                                                            ----                                             ----                       ----                                     ----                                         ---                                       ----
                 GAAP combined                                                                                                                              97.8%                                            90.1%                      95.8%                                    94.3%                                        n/m                                       94.3%
         -------------                                                                                                                                      ----                                             ----                       ----                                     ----                                         ---                                       ----


         Nine Months Ended September 30, 2012
                                                                                                                                         MGA Business                                 Specialty Industries         Specialty Products         Specialty Insurance Operations (1)       Other Insurance Operations (2)              Consolidated Insurance Operations (2)
                                                                                                                                         ------------                                 --------------------         ------------------         ---------------------------------         -----------------------------              ------------------------------------
         Net written premiums                                                                                                                             $263.4                                           $337.8                     $329.2                                   $930.4            $                              -                                     $930.4
                                                                                                                                                                                                                                                                               ------            --------------------------------                                     ------
         Earned premiums                                                                                                                                  $227.5                                           $309.0                     $309.5                                   $846.0            $                              -                                     $846.0
                                                                                                                                                                                                                                                                               ------            --------------------------------                                     ------

         Ratios
              Loss and loss adjustment expenses                                                                                                             49.5%                                            51.7%                      58.2%                                    53.5%                                        n/m                                       53.5%
                                                                                                                                                                                                                                                                                 ----                                         ---                                       ----
              Expense                                                                                                                                       45.0%                                            37.7%                      36.5%                                    39.2%                                        n/m                                       39.2%
                                                                                                                                                            ----                                             ----                       ----                                     ----                                         ---                                       ----
                 GAAP combined                                                                                                                              94.5%                                            89.4%                      94.7%                                    92.7%                                        n/m                                       92.7%
                                                                                                                                                            ----                                             ----                       ----                                     ----                                         ---                                       ----


         Nine Months Ended September 30, 2011
                                                                                                                                         MGA Business                                 Specialty Industries         Specialty Products         Specialty Insurance Operations (1)       Other Insurance Operations (2)              Consolidated Insurance Operations (2)
                                                                                                                                         ------------                                 --------------------         ------------------         ---------------------------------         -----------------------------              ------------------------------------
         Net written premiums                                                                                                                             $230.7                                           $278.2                     $312.6                                   $821.5                                       $(0.1)                                    $821.4
                                                                                                                                                                                                                                                                               ------                                       -----                                     ------
         Earned premiums                                                                                                                                  $204.1                                           $254.8                     $289.0                                   $747.9                                        $0.1                                     $748.0
                                                                                                                                                                                                                                                                               ------                                        ----                                     ------

         Ratios
              Loss and loss adjustment expenses                                                                                                             50.8%                                            54.2%                      62.2%                                    56.3%                                        n/m                                       56.3%
                                                                                                                                                                                                                                                                                 ----                                         ---                                       ----
              Expense                                                                                                                                       42.7%                                            39.2%                      34.1%                                    38.2%                                        n/m                                       38.2%
                                                                                                                                                            ----                                             ----                       ----                                     ----                                         ---                                       ----
                 GAAP combined                                                                                                                              93.5%                                            93.4%                      96.3%                                    94.5%                                        n/m                                       94.5%
         -------------                                                                                                                                      ----                                             ----                       ----                                     ----                                         ---                                       ----

     (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, OneBeacon Entertainment and 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. Also included in Specialty Products is
          OneBeacon's newest specialty business, OneBeacon Surety Group.

     (2)  Other Insurance Operations includes the results of a reciprocal insurance exchange that is not actively writing any business; as a result GAAP ratios are not meaningful.
          Note as a result of entering into a definitive agreement to sell the Runoff Business and the sale of the AutoOne business, results for the Runoff Business and AutoOne are
          reported as discontinued operations in a single financial statement caption outside of underwriting results for all periods presented.  The AutoOne transaction closed in
          February 2012.

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




                                                                                                                                                                                                                      September 30,   June 30,            December 31,      September 30,
                                                                                                                                                                                                                                2012        2012                       2011           2011
                                                                                                                                                                                                                                ----        ----                       ----           ----
         Numerator
         OneBeacon's common shareholders' equity                                                                                                                                                                            $1,048.4             $1,131.8                         $1,099.8 $1,100.2

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

         Book value per share                                                                                                                                                                                                 $10.99               $11.86                           $11.56   $11.57
                                                                                                                                                                                                                              ======               ======                           ======   ======




         Growth in book value per share, including dividends, in the quarter
           on an IRR basis (2)                                                                                                                                                                                                  -5.6%

         Growth in book value per share, including dividends, in the nine month period
           on an IRR basis (3)                                                                                                                                                                                                   0.5%

          Growth in book value per share, including dividends, in the last twelve
          months
           on an IRR basis (4)                                                                                                                                                                                                   2.3%


     (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 $0.63 per share (a quarterly dividend
          of $0.21 per share).

     (4)  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).

                           ONEBEACON INSURANCE GROUP, LTD.
     COMPREHENSIVE (LOSS) INCOME, NET (LOSS) INCOME AND OPERATING (LOSS) INCOME
                       (in millions, except per share amounts)
                                     (Unaudited)
                                                                                                                                                                                                                                                                                                                                                           Twelve Months
                                                                                                                                                                                                                                                                                                                                                               Ended
                                                                                                                                                                                                                                                                                                                                                           September 30,
                                                                                                                                                                                                                                                                                                                                                           -------------
                                                                                                                                                                                                                                                               Three Months Ended September 30,      Nine Months Ended September 30,
                                                                                                                                                                                                                                                               --------------------------------      -------------------------------
                                                                                                                                                                                                                                                                                               2012                                   2011    2012   2011                  2012
                                                                                                                                                                                                                                                                                               ----                                   ----    ----   ----                  ----

                                                                                Comprehensive (loss) income attributable to OneBeacon's common shareholders                                                                                                                                  $(64.2)                                $(32.7)  $(7.6) $24.8                 $11.5
                                                                                                                                                                                                                                                                                             ======                                 ======   =====  =====                 =====


                                                                                Net (loss) income attributable to OneBeacon's common shareholders                                                                                                                                            $(62.2)                                $(32.9)  $(5.9) $24.5                 $24.7

                                                                                Weighted average common shares outstanding (1)                                                                                                                                                                 95.4                                   95.1    95.3   94.7                  95.2
                                                                                                                                                                                                                                                                                               ----                                   ----    ----   ----                  ----

                                                                                Net (loss) income attributable to OneBeacon's common shareholders per share                                                                                                                                  $(0.65)                                $(0.35) $(0.07) $0.25                 $0.26
                                                                                                                                                                                                                                                                                             ======                                 ======  ======  =====                 =====


                                                                                Net (loss) income attributable to OneBeacon's common shareholders                                                                                                                                            $(62.2)                                $(32.9)  $(5.9) $24.5                 $24.7
                                                                                Less:
                                                                                Net realized and unrealized investment (gains) and losses                                                                                                                                                     (40.0)                                  47.4   (57.9)  13.3                 (81.8)
                                                                                Tax effect on net realized and unrealized investment (gains) and losses                                                                                                                                        14.0                                  (16.6)   20.3   (4.7)                 28.6
                                                                                                                                                                                                                                                                                               ----                                  -----    ----   ----                  ----
                                                                                  Operating (loss) income (2)                                                                                                                                                                                $(88.2)                                 $(2.1) $(43.5) $33.1                $(28.5)
                                                                                                                                                                                                                                                                                             ======                                  =====  ======  =====                ======

                                                                                Weighted average common shares outstanding (1)                                                                                                                                                                 95.4                                   95.1    95.3   94.7                  95.2
                                                                                                                                                                                                                                                                                               ----                                   ----    ----   ----                  ----

                                                                                Operating (loss) income per share (2)                                                                                                                                                                        $(0.92)                                $(0.02) $(0.46) $0.35                $(0.30)
                                                                                                                                                                                                                                                                                             ======                                 ======  ======  =====                ======


                                                                                 (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
                                                                                                                                                                                                                                                                                                                                                                            September 30, 2012
                                                                                                                                                                                                                                                                                                                                                                            ------------------
    Numerator:
    [A]                                                                                                                Comprehensive income attributable to OneBeacon's common shareholders                                                                                                                                                                                                                               $11.5
                                                                                                                                                                                                                                                                                                                                                                                                                                 
    [B]                                                                                                                Operating loss(1)                                                                                                                                                                                                                                                                                 $(28.5)
                                                                                                                                                                                                                                                                                                                                                                                                                                 
                                                                                                                                                                                                                                                                As of                                                             As of
                                                                                                                                                                                                                                                         September 30, 2012                                                September 30, 2011                                                     Average
                                                                                                                                                                                                                                                         ------------------                                                ------------------                                                     -------
    Denominator:
    [C]                                                                                                                OneBeacon's common shareholders' equity                                                                                                                     $1,048.4                                                          $1,100.2                                                          $1,074.3
                                                                                                                                                                                                                                                                                                                                                                                                                                 
                                                                                                                       Less:
                                                                                                                        Net unrealized gains and losses and net foreign currency gains and losses on
                                                                                                                        investments (2)                                                                                                                                              (130.7)                                                            (78.7)
                                                                                                                        Tax effect on net unrealized gains and losses and net foreign currency gains and
                                                                                                                        losses on investments                                                                                     45.7                                                              27.5
                                                                                                                       AOCI/L, after tax                                                                                                                                               12.6                                                              (0.6)
                                                                                                                                                                                                                                                                                                                                                                            
                                                                                                                                                                                                                                                                                                                                                                                                                                 
                                                                                                                                                                                                                                                                                                                                                                                                                                 
    [D]                                                                                                                 Adjusted OneBeacon's common shareholders' equity excluding net unrealized
                                                                                                                        investment gains and losses, after tax, and AOCI/L (1)                                                                                                       $976.0                                                          $1,048.4                                                          $1,012.2
                                                                                                                                                                                                                                                                                                                                                                            
                                                                                                                                                                                                                                                                                                                                                                                                                                 
                                                                                                                                                                                                                                                                                                                                                                                                                                 
    Returns:
                                                                                                                        Comprehensive return on average OneBeacon's common shareholders' equity  [ A /
                                                                                                                        C ]                                                                                                                                                                                                                                                                                                 1.1%
                                                                                                                                                                                                                                                                                                                                                                                                                                 
                                                                                                                        Operating return on average adjusted OneBeacon's common shareholders' equity excluding net unrealized investment gains and
                                                                                                                        losses, after tax, and AOCI/L [ B / D ]                                                                                                                                    -2.8%
                                                                                                                                                                                                                                                                                                                                                                                                                                 
                                                                                                                  (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 September 30, 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 (loss) income is a non-GAAP financial measure that excludes net realized and unrealized investment gains or losses and the related tax effects from net (loss) 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 (loss) 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 (loss) income per share is calculated by dividing operating (loss) income (a non-GAAP financial measure described above) by the weighted average number of common shares outstanding. Management believes that operating (loss) 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 (loss) 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 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.

SOURCE OneBeacon Insurance Group