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Exhibit 99.1


RECENT DEVELOPMENTS

        On April 27, 2011, we reported earnings for the first quarter of 2011. Outlined below is a summary of those results. We expect to file our Quarterly Report on Form 10-Q for the quarterly period ended March 31, 2011, with the Securities and Exchange Commission on or before May 6, 2011, which will contain more detailed information than is included below.

    Earnings Overview

        During the first quarter of 2011 we reported a net loss of $104.3 million, or $1.67 per share, compared to net income of $9.9 million, or $0.13 per share, during the first quarter of 2010. Our comprehensive loss for the first quarter of 2011 was $103.8 million and our GAAP combined ratio was 178.8%, compared to comprehensive net income of $5.5 million and a GAAP combined ratio of 123.5% for the first quarter of 2010.

        We ended the first quarter of 2011 with a fully converted tangible book value per share of $23.03, a decrease of 5.7% for the past three months and an increase of 10.0% for the past twelve months, taking into account dividends declared during such periods. Our fully converted tangible book value per share at March 31, 2011 is based on shareholders' equity of $1,472.1 million less intangible assets of $4.7 million divided by 63,724,993 common shares (consisting of 62,347,071 shares outstanding plus 1,377,922 shares issuable upon conversion of outstanding share equivalents). The return for the quarter and for the past twelve months represents the decrease in fully converted tangible book value per share from December 31, 2010 ($24.53) to March 31, 2011 ($23.03), after taking into account dividends declared of $0.10 per share, and the increase in fully converted tangible book value per share from March 31, 2010 ($21.29) to March 31, 2011 ($23.03), after taking into account dividends declared of $0.38 per share.

        The decrease in our net income and fully converted tangible book value per share during the first quarter of 2011 was the result of significant catastrophe losses offsetting our investment results. Our underwriting results for the first quarter of 2011 included $214.3 million in aggregate net losses associated with the March Japanese earthquake, the February New Zealand earthquake and the January Australia floods and Cyclone Yasi, partially offset by $33.6 million of net favorable reserve development on prior year losses. Our underwriting results for the first quarter of 2010 included $103.7 million in aggregate net losses associated with the February Chilean earthquake, partially offset by $24.1 million of net favorable reserve development on prior year losses.

        Net realized and unrealized investment gains experienced during the first quarter of 2011 were $16.6 million compared to $28.8 million of net gains experienced during the first quarter of 2010.

S-8



MONTPELIER RE HOLDINGS LTD.
CONSOLIDATED BALANCE SHEETS
Unaudited

(In millions of U.S. dollars, except share amounts)
  March 31,
2011
  December 31,
2010
 

Assets

             

Fixed maturity investments, at fair value (amortized cost: $2,247.7 and $2,270.0)

  $ 2,270.8   $ 2,289.3  

Equity securities, at fair value (cost: $80.0 and $116.9)

    122.8     152.9  

Other investments (cost: $79.1 and $84.2)

    85.7     90.1  
           
 

Total investments

    2,479.3     2,532.3  

Cash and cash equivalents

    323.1     232.3  

Restricted cash

    9.9     27.1  

Reinsurance recoverable on unpaid losses

    68.7     62.4  

Reinsurance recoverable on paid losses

    2.5     12.9  

Insurance and reinsurance premiums receivable

    280.1     201.6  

Unearned ceded reinsurance premiums

    35.1     22.9  

Deferred insurance and reinsurance acquisition costs

    52.4     45.0  

Accrued investment income

    16.7     16.2  

Unsettled sales of investments

    74.4     32.5  

Other assets

    29.0     34.2  
           

Total Assets

  $ 3,371.2   $ 3,219.4  
           

Liabilities

             

Loss and loss adjustment expense reserves

  $ 990.9   $ 784.6  

Debt

    327.8     327.7  

Unearned insurance and reinsurance premiums

    340.0     264.0  

Insurance and reinsurance balances payable

    46.0     33.8  

Unsettled purchases of investments

    143.1     108.9  

Accounts payable, accrued expenses and other liabilities

    51.3     71.6  
           
 

Total Liabilities

    1,899.1     1,590.6  
           

Commitments and contingent liabilities

         

Common Shareholders' Equity

             

Common Shares at 1/6 cent par value per share—authorized 1,200,000,000 shares; issued 64,256,980 and 66,610,232 shares

    0.1     0.1  

Additional paid-in capital

    1,209.6     1,258.7  

Treasury shares at cost: 1,909,909 and 2,053,028 shares

    (30.3 )   (32.7 )

Retained earnings

    298.4     408.9  

Accumulated other comprehensive loss

    (5.7 )   (6.2 )
           
 

Total Common Shareholders' Equity

    1,472.1     1,628.8  
           

Total Liabilities and Common Shareholders' Equity

  $ 3,371.2   $ 3,219.4  
           

S-9



MONTPELIER RE HOLDINGS LTD.
CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME
Unaudited

 
  Three Months Ended
March 31,
 
(In millions of U.S. dollars, except per share amounts)
  2011   2010  

Revenues

             
 

Gross insurance and reinsurance premiums written

  $ 254.1   $ 274.8  
   

Ceded reinsurance premiums

    (27.6 )   (12.9 )
           
 

Net insurance and reinsurance premiums written

    226.5     261.9  
   

Change in net unearned insurance and reinsurance premiums

    (60.4 )   (103.4 )
           
 

Net insurance and reinsurance premiums earned

    166.1     158.5  
 

Net investment income

    17.5     18.5  
 

Net realized and unrealized investment gains

    16.6     28.8  
 

Net foreign exchange gains (losses)

    (2.0 )   7.1  
 

Net expense from derivative instruments

    (0.6 )   (2.9 )
 

Other revenue

        0.2  
           
     

Total revenues

    197.6     210.2  
           

Expenses

             
 

Underwriting expenses:

             
   

Loss and loss adjustment expenses

    248.4     144.2  
   

Insurance and reinsurance acquisition costs

    24.7     22.4  
   

General and administrative expenses

    24.0     29.1  
 

Non-underwriting expenses:

             
   

Interest and other financing expenses

    5.9     6.5  
           
     

Total expenses

    303.0     202.2  
           

Income (loss) before income taxes

    (105.4 )   8.0  
 

Income tax benefit

    1.1     1.9  
           

Net income (loss)

    (104.3 )   9.9  
           
 

Change in foreign currency translation

    0.5     (1.8 )
 

Reclassification of inception-to-date net unrealized gain from Symetra

        (2.6 )
           

Comprehensive income (loss)

  $ (103.8 ) $ 5.5  
           

Basic and diluted earnings (loss) per share

  $ (1.67 ) $ 0.13  
           

Dividends declared per Common Share

  $ 0.100   $ 0.090  
           

S-10



GROSS WRITTEN PREMIUMS BY LINE OF BUSINESS

        The following tables present the Company's gross premiums written, by line of business and reportable segment, during the three months ended March 31, 2011 and 2010:

Three Months Ended March 31, 2011
  Montpelier
Bermuda
  Montpelier
Syndicate
5151
  MUSIC   Corporate
and Other(1)
  Total  

Property Catastrophe—Treaty

  $ 106.4   $ 25.5   $   $   $ 131.9  

Property Specialty—Treaty

    14.9     3.9             18.8  

Other Specialty—Treaty

    26.9     20.2             47.1  

Property and Specialty Individual Risk

    9.6     34.2     12.9     (0.4 )   56.3  
                       
 

Total gross premiums written

  $ 157.8   $ 83.8   $ 12.9   $ (0.4 ) $ 254.1  
                       

 

Three Months Ended March 31, 2010
  Montpelier
Bermuda
  Montpelier
Syndicate
5151
  MUSIC   Corporate
and Other
  Total  

Property Catastrophe—Treaty

  $ 115.3   $ 30.3   $   $   $ 145.6  

Property Specialty—Treaty

    12.3     7.2             19.5  

Other Specialty—Treaty

    44.0     22.2             66.2  

Property and Specialty Individual Risk

    11.8     23.3     8.6     (0.2 )   43.5  
                       
 

Total gross premiums written

  $ 183.4   $ 83.0   $ 8.6   $ (0.2 ) $ 274.8  
                       

(1)
Represents an inter-segment excess-of-loss reinsurance arrangement between MUSIC and Montpelier Syndicate 5151, which is eliminated in consolidation.

S-11




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RECENT DEVELOPMENTS
MONTPELIER RE HOLDINGS LTD. CONSOLIDATED BALANCE SHEETS Unaudited
MONTPELIER RE HOLDINGS LTD. CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME Unaudited
GROSS WRITTEN PREMIUMS BY LINE OF BUSINESS