Allied World Reports Increase in Net Income Despite Increased Industry Loss Activity; Announces US$500 Million Share Repurchase Program

By Allied World Assurance Company Holdings Ltd, PRNE
Wednesday, May 5, 2010

PEMBROKE, Bermuda, May 6, 2010 - Allied World Assurance Company Holdings, Ltd (NYSE: AWH) today reported
net income of US$133.7 million, or US$2.52 per diluted share, for the first
quarter of 2010 compared to net income of US$131.4 million, or US$2.57 per
diluted share, for the first quarter of 2009. The company reported operating
income of US$61.3 million, or US$1.16 per diluted share, for the first
quarter of 2010 compared to operating income of US$137.6 million, or US$2.69
per diluted share, for the first quarter of 2009.

President and Chief Executive Officer Scott Carmilani commented, "I am
pleased to report that Allied World continued to grow book value in the first
quarter of 2010 despite continued competitive pricing pressures and some
significant catastrophic loss activity that occurred throughout the world.
Thanks to our underwriting discipline, strong and stable investment portfolio
and our historically prudent reserving philosophy we were able to grow book
value by 3.9% during the quarter and now have a total capital base in excess
of US$3.8 billion."

Mr. Carmilani continued, "Since our company went public in 2006, we have
more than doubled our total book value and outperformed our peer group over
that period. Given the continued soft market conditions, we are finding it
increasingly difficult to find attractive opportunities to deploy excess
capital. Accordingly, our board of directors has authorized us to initiate a
share repurchase program of up to US$500 million over the next two years.
Based upon the average closing price of our shares over the past 30 days,
this plan would equate to a repurchase of over 20% of our common shares
outstanding. We believe this authorization gives us additional financial
flexibility to manage the company's capital as we work to continue to meet
shareholder expectations both in terms of operating returns and growth in
book value per share."

Underwriting Results

Gross premiums written were US$504.2 million in the first quarter of
2010, a 5.1% increase compared to US$479.6 million in the first quarter of
2009. The increase was primarily due to increased new business in our
reinsurance and U.S. insurance segments offset by the non-renewal of business
in all three of our operating segments which did not meet our underwriting
requirements (which included inadequate pricing and/or terms and conditions).
The growth in the reinsurance segment included higher gross premiums written
in our international reinsurance business during the first quarter of 2010.

Net premiums written were US$433.3 million in the first quarter of 2010,
a 7.0% increase compared to US$405.0 million in the first quarter of 2009.
The increase in net premiums written was primarily due to higher gross
premiums written as well as a reduction of premiums ceded.

Net premiums earned in the first quarter of 2010 were US$338.3 million, a
4.4% increase compared to US$324.0 million in the first quarter of 2009. This
increase was driven by increased net premiums written in the current and
prior periods, as well as the impact of the US$9.3 million commutation of
certain swing-rated reinsurance contracts that were fully earned.

The combined ratio was 99.5% in the first quarter of 2010 compared to
75.0% in the first quarter of 2009. The loss and loss expense ratio was 68.6%
in the first quarter of 2010 compared to 45.8% in the first quarter of 2009.
During the first quarter of 2010, the company recorded net favorable reserve
development on prior loss years of US$73.9 million, a benefit of 21.8
percentage points to the company's loss and loss expense ratio for the
quarter. Absent prior year reserve adjustments, the loss and loss expense
ratio related to the first quarter of 2010 was 90.4%, compared to 64.4% for
the first quarter of 2009. The increase in the loss and loss expense ratio
for the first quarter of 2010 was primarily due to losses from the earthquake
in Chile of US$65 million as well as losses of US$21.5 million from other
major loss events in the quarter. These items contributed 25.6 points to the
current loss year's loss and loss expense ratio.

The company's expense ratio was 30.9% for the first quarter of 2010
compared to 29.2% for the first quarter of 2009 due to an increase in both
the company's acquisition cost ratio and general and administrative expense
ratio. Our acquisition cost ratio increased to 12.1% for the first quarter of
2010 compared to 11.5% for the first quarter of 2009. The increase in the
acquisition cost ratio was primarily due to the increase in net premiums
earned in our U.S. insurance and reinsurance segments, which typically have
higher acquisition costs than our international insurance segment, and
represented a greater proportion of earned premiums in the first quarter of
2010 compared to the same period in 2009. Our general and administrative
expense ratio increased to 18.8% for the first quarter of 2010 compared to
17.7% for the first quarter 2009. The increase in our general and
administrative expense ratio was primarily due to increases in our overall
staff count and related increases in incentive compensation expenses.

Investment Results

The total return on the company's investment portfolio for the first
quarter 2010 was approximately 1.8% which annualizes to 7.3%. Net investment
income in the first quarter of 2010 was US$68.9 million, a decrease of 11.5%
from the US$77.9 million of net investment income in the first quarter of
2009. The decrease was primarily the result of lower reinvestment yields on
our fixed maturity securities. Annualized book yield for the first quarter of
2010 was 3.7%, versus the annualized book yield of 4.6% in the first quarter
of 2009.

The company recorded net investment gains of US$77.5 million for the
first quarter of 2010 comprised of US$45.3 million in net realized gains
primarily from the sale of debt securities and US$32.2 million related to the
mark-to-market adjustments of our hedge fund investments and debt securities
that are carried as "trading" on our balance sheet.

As of March 31, 2010 and December 31, 2009, net accumulated unrealized
gains were US$142.3 million and US$149.8 million, respectively.

Shareholders' Equity

As of March 31, 2010, shareholders' equity was US$3.3 billion, a 3.9%
increase compared to US$3.2 billion as of December 31, 2009, primarily driven
by strong investment returns.

The company's annualized net income return on average shareholders'
equity for the first quarter of 2010 was 17.1% and the annualized operating
return on average shareholders' equity for the first quarter of 2010 was
7.8%.

As of March 31, 2010, diluted book value per share was US$61.59, an
increase of 3.4% compared to US$59.56 as of December 31, 2009.

Quarterly Dividend

Allied World announced today that its board of directors has declared a
quarterly dividend of US$0.20 per common share. The dividend will be payable
on June 10, 2010 to shareholders of record on May 25, 2010.

Share Repurchase Program

Allied World announced today that its board of directors has authorized
the company to repurchase up to US$500 million in the company's common shares
through a share repurchase program. Repurchases may be effected from time to
time through open market purchases, privately negotiated transactions, tender
offers or otherwise. This authorization is effective through May 3, 2012. The
timing, form and amount of the share repurchases under the program will
depend on a variety of factors, including market conditions, the company's
capital position, legal requirements and other factors. At any time, the
repurchase program may be modified, extended or terminated by the board of
directors.

Investment Supplement

Allied World will be providing additional information on its investment
portfolio as of March 31, 2010. This information will be available at the
"Investor Relations" section of the company's website at www.awac.com.

Financial Supplement

A financial supplement relating to the first quarter of 2010 will be
available at the "Investor Relations" section of the company's website at
www.awac.com.

Conference Call

Allied World will host a conference call on Friday, May 7, 2010 at 8:00
a.m. (Eastern Time)
to discuss the first quarter 2010 financial results. The
public may access a live webcast of the conference call at the "Investor
Relations" section of the company's website at www.awac.com. In
addition, the conference call can be accessed by dialing 1-800-901-5241 (U.S.
and Canada callers) or +1-617-786-2963 (international callers) and entering
the passcode 95279218 approximately ten minutes prior to the call.

Following the conclusion of the presentation, a replay of the call will
be available through Friday, May 21, 2010 by dialing 1-888-286-8010 (U.S. and
Canada callers) or +1-617-801-6888 (international callers) and entering the
passcode 99990951. In addition, the webcast will remain available online
through Friday, May 21, 2010 at www.awac.com.

Non-GAAP Financial Measures

In presenting the company's results, management has included and
discussed in this press release certain non generally accepted accounting
principles ("non-GAAP") financial measures within the meaning of Regulation G
as promulgated by the U.S. Securities and Exchange Commission. Management
believes that these non-GAAP measures, which may be defined differently by
other companies, better explain the company's results of operations in a
manner that allows for a more complete understanding of the underlying trends
in the company's business. However, these measures should not be viewed as a
substitute for those determined in accordance with generally accepted
accounting principles ("U.S. GAAP").

"Operating income" is an internal performance measure used in the
management of the company's operations and represents after-tax operational
results excluding, as applicable, net realized investment gains or losses,
net impairment charges recognized in earnings, impairment of intangible
assets and foreign exchange gain or loss. The company excludes net realized
investment gains or losses, net impairment charges recognized in earnings and
net foreign exchange gain or loss from the calculation of operating income
because the amount of these gains or losses is heavily influenced by and
fluctuates in part according to the availability of market opportunities and
other factors. The company excludes impairment of intangible assets as these
are non-recurring charges. The company believes these amounts are largely
independent of our business and underwriting process and including them
distorts the analysis of trends in operations. In addition to presenting net
income determined in accordance with U.S. GAAP, the company believes that
showing operating income enables investors, analysts, rating agencies and
other users of the company's financial information to more easily analyze our
results of operations in a manner similar to how management analyzes
underlying business performance. Operating income should not be viewed as a
substitute for U.S. GAAP net income.

The company has included "diluted book value per share" because it takes
into account the effect of dilutive securities; therefore, the company
believes it is a better measure of calculating shareholder returns than book
value per share.

"Annualized net income return on average shareholders' equity" ("ROAE")
is calculated using average shareholders' equity, excluding the average after
tax unrealized gains (or losses) on investments. Unrealized gains (losses) on
investments are primarily the result of interest rate and risk premium
movements and the resultant impact on fixed income securities. Such gains
(losses) are not related to management actions or operational performance,
nor are they likely to be realized. Therefore, the company believes that
excluding these unrealized gains (losses) provides a more consistent and
useful measurement of operating performance, which supplements GAAP
information. In calculating ROAE, the net income (loss) available to
shareholders for the period is multiplied by the number of such periods in a
calendar year in order to arrive at annualized net income (loss) available to
shareholders. The company presents ROAE as a measure that is commonly
recognized as a standard of performance by investors, analysts, rating
agencies and other users of its financial information.

"Annualized operating return on average shareholders' equity" is
calculated using operating income (as defined above and annualized in the
manner described for net income (loss) available to shareholders under ROAE
above), and average shareholders' equity, excluding the average after tax
unrealized gains (losses) on investments. Unrealized gains (losses) are
excluded from equity for the reasons outlined in the annualized net income
return on average shareholders' equity explanation above.

Reconciliations of these financial measures to their most directly
comparable GAAP measures are included in the attached tables.

About Allied World Assurance Company

Allied World Assurance Company Holdings, Ltd, through its subsidiaries,
is a global provider of innovative property, casualty and specialty insurance
and reinsurance solutions, offering superior client service through offices
in Bermuda, Europe, Hong Kong, Singapore and the United States. Our insurance
and reinsurance subsidiaries are rated A (Excellent) by A.M. Best Company.
For further information on Allied World, please visit our website at
www.awac.com.

Cautionary Statement Regarding Forward-Looking Statements

Any forward-looking statements made in this press release reflect our
current views with respect to future events and financial performance and are
made pursuant to the safe harbor provisions of the Private Securities
Litigation Reform Act of 1995. Such statements involve risks and
uncertainties, which may cause actual results to differ materially from those
set forth in these statements. For example, our forward-looking statements
could be affected by pricing and policy term trends; increased competition;
the impact of acts of terrorism and acts of war; greater frequency or
severity of unpredictable catastrophic events; investigations of market
practices and related settlement terms; negative rating agency actions; the
adequacy of our loss reserves; the company or its subsidiaries becoming
subject to significant income taxes in the United States or elsewhere;
changes in regulations or tax laws; changes in the availability, cost or
quality of reinsurance or retrocessional coverage; adverse general economic
conditions; and judicial, legislative, political and other governmental
developments, as well as management's response to these factors, and other
factors identified in our filings with the U.S. Securities and Exchange
Commission. You are cautioned not to place undue reliance on these
forward-looking statements, which speak only as of the date on which they are
made. We are under no obligation (and expressly disclaim any such obligation)
to update or revise any forward-looking statement that may be made from time
to time, whether as a result of new information, future developments or
otherwise.

    ALLIED WORLD ASSURANCE COMPANY HOLDINGS, LTD
    UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS
    (Expressed in thousands of United States dollars, except
     share and per share amounts)

                                             Quarter Ended March 31,
                                                  2010          2009
                                                  ----          ----

    Revenues:
      Gross premiums written                  $504,163      $479,597
      Premiums ceded                           (70,871)      (74,559)
                                               -------       -------

      Net premiums written                     433,292       405,038
      Change in unearned premiums              (94,968)      (81,066)
                                               -------       -------
      Net premiums earned                      338,324       323,972

      Net investment income                     68,902        77,854
      Net realized investment gains             77,487        36,602
      Net impairment charges recognized
       in earnings                                (168)      (41,963)
      Other income                                 297           466
                                                   ---           ---
      Total revenue                            484,842       396,931
                                               -------       -------
    Expenses:
      Net losses and loss expenses             232,154       148,497
      Acquisition costs                         40,784        37,129
      General and administrative
       expenses                                 63,463        57,365
      Amortization and impairment of
       intangible assets                           892         1,065
      Interest expense                           9,528        10,447
      Foreign exchange loss                      1,076           835
                                                 -----           ---
      Total expenses                           347,897       255,338
                                               -------       -------
    Income before income taxes                 136,945       141,593
      Income tax expense                         3,205        10,185
                                                 -----        ------
    NET INCOME                                $133,740      $131,408
                                              ========      ========

    PER SHARE DATA:
      Basic earnings per share                   $2.67         $2.67
      Diluted earnings per share                 $2.52         $2.57

      Weighted average common shares
       outstanding                          50,023,816    49,248,118
      Weighted average common shares and
       common share equivalents
       outstanding                          53,115,756    51,120,049

      Dividends declared per share               $0.20         $0.18
    ALLIED WORLD ASSURANCE COMPANY HOLDINGS, LTD
    UNAUDITED CONDENSED CONSOLIDATED BALANCE SHEETS
    (Expressed in thousands of United States dollars, except share and
     per share amounts)

                                                         As of         As of
                                                      March 31,  December 31,
    ASSETS:                                               2010          2009
                                                          ----          ----
    Fixed maturity investments available
     for sale, at fair value (amortized
     cost: 2010: $3,069,009; 2009:
     $4,260,844)                                    $3,227,889     $4,427,072
    Fixed maturity investments trading, at
     fair value                                      3,868,044      2,544,322
    Other invested assets trading, at fair
     value                                             261,930        184,869
                                                       -------        -------

    Total investments                                7,357,863      7,156,263
    Cash and cash equivalents                          497,574        379,751
    Insurance balances receivable                      493,775        395,621
    Prepaid reinsurance                                170,948        186,610
    Reinsurance recoverable                            920,480        919,991
    Accrued investment income                           54,532         53,046
    Net deferred acquisition costs                      97,429         87,821
    Goodwill                                           268,376        268,376
    Intangible assets                                   59,467         60,359
    Net balances receivable on purchases
     and sales of investments                                -            184
    Net deferred tax assets                             16,897         21,895
    Other assets                                        75,386         67,566
                               Total assets        $10,012,727     $9,597,483
                                                   -----------     ----------

    LIABILITIES:
    Reserve for losses and loss expenses            $4,853,359     $4,761,772
    Unearned premiums                                1,007,926        928,619
    Reinsurance balances payable                        82,541        102,837
    Net balances payable on purchases and
     sales of investments                              172,797              -
    Dividends payable                                   10,092              -
    Senior notes                                       498,951        498,919
    Accounts payable and accrued
     liabilities                                        48,254         92,041
                          Total liabilities         $6,673,920     $6,384,188
                                                    ----------     ----------

    SHAREHOLDERS' EQUITY:
    Common shares, par value $0.03 per
     share:issued and outstanding 2010:
     50,459,000 shares; 2009: 49,734,487
     shares                                             $1,514         $1,492
    Additional paid-in capital                       1,369,341      1,359,934
    Retained earnings                                1,825,668      1,702,020
    Accumulated other comprehensive income,
     net of tax                                        142,284        149,849
                                                       -------        -------
                 Total shareholders' equity         $3,338,807     $3,213,295
                                                    ----------     ----------

        Total liabilities and shareholders'
                                     equity        $10,012,727     $9,597,483
                                                   ===========     ==========
    ALLIED WORLD ASSURANCE COMPANY HOLDINGS, LTD
    UNAUDITED CONSOLIDATED SEGMENT DATA
    (Expressed in thousands of United States dollars,
    except for ratio information)

    Quarter Ended             U.S.      International
     March 31, 2010        Insurance      Insurance     Reinsurance  Total
    -------------          ---------       ---------     ---------   -----

    Gross premiums
     written                $162,085        $121,422      $220,656  $504,163
    Net premiums
     written                 131,555          81,081       220,656   433,292
    Net premiums
     earned                  129,205          87,043       122,076   338,324
    Other income                 297               -             -       297
    Net losses and
     loss expenses           (98,425)        (57,449)      (76,280) (232,154)
    Acquisition
     costs                   (16,960)            (66)      (23,758)  (40,784)
    General and
     administrative          (27,114)        (21,845)      (14,504)  (63,463)
     expenses                -------         -------       -------   -------
    Underwriting
     (loss) income           (12,997)          7,683         7,534     2,220
    Net investment
     income                                                           68,902
    Net realized
     investment
     gains                                                            77,487
    Net impairment
     charges                                                            (168)
    recognized in
     earnings
    Amortization
     and
     impairment                                                         (892)
     of intangible
      assets
    Interest
     expense                                                          (9,528)
    Foreign
     exchange loss                                                    (1,076)
                                                                      ------
    Income before
     income taxes                                                   $136,945
                                                                    ========

    GAAP Ratios:
    Loss and loss
     expense ratio              76.2%           66.0%         62.5%     68.6%
    Acquisition
     cost ratio                 13.1%            0.1%         19.5%     12.1%
    General and
     administrative
     expense ratio              21.0%           25.1%         11.9%     18.8%
                              -------         -------       -------   -------
    Combined ratio             110.3%           91.2%         93.9%     99.5%
                               =====            ====          ====      ====

    Quarter Ended             U.S.      International
     March 31, 2009        Insurance      Insurance    Reinsurance   Total
    -------------          ---------      ---------    -----------   -----

    Gross premiums
     written                $153,369        $125,919      $200,309  $479,597
    Net premiums
     written                 115,844          88,957       200,237   405,038
    Net premiums
     earned                  105,267         111,194       107,511   323,972
    Other income                 466               -             -       466
    Net losses and
     loss expenses           (54,177)        (39,193)      (55,127) (148,497)
    Acquisition
     costs                   (14,411)         (1,060)      (21,658)  (37,129)
    General and
     administrative          (27,399)        (18,819)      (11,147)  (57,365)
    expenses                 -------         -------       -------   -------
    Underwriting
     income                    9,746          52,122        19,579    81,447
    Net investment
     income                                                           77,854
    Net realized
     investment
     losses                                                           36,602
    Net impairment
     charges                                                         (41,963)
    recognized in
     earnings
    Amortization
     and
     impairment                                                       (1,065)
    of intangible
     assets
    Interest
     expense                                                         (10,447)
    Foreign
     exchange loss                                                      (835)
                                                                        ----
    Income before
     income taxes                                                   $141,593
                                                                    ========

    GAAP Ratios:
    Loss and loss
     expense ratio              51.5%           35.2%         51.3%     45.8%
    Acquisition
     cost ratio                 13.7%            1.0%         20.1%     11.5%
    General and
     administrative             26.0%           16.9%         10.4%     17.7%
    expense ratio               ----            ----          ----      ----
    Combined ratio              91.2%           53.1%         81.8%     75.0%
                                ====            ====          ====      ====
    ALLIED WORLD ASSURANCE COMPANY HOLDINGS, LTD
    UNAUDITED OPERATING INCOME RECONCILIATION
    (Expressed in thousands of United States dollars, except share
     and per share amounts)

                                                 Quarter Ended March 31,
                                                 2010              2009
                                                 ----              ----

    Net income                               $133,740          $131,408
      Net realized investment gains           (73,602)          (36,602)
      Net impairment charges recognized
       in earnings                                109            41,963
      Foreign exchange loss                     1,076               835
                                                -----               ---
    Operating income                          $61,323          $137,604
                                              =======          ========

    Weighted average common shares outstanding:
    Basic                                  50,023,816        49,248,118
    Diluted                                53,115,756        51,120,049

    Basic per share data:
    Net income                                  $2.67             $2.67
      Net realized investment gains             (1.47)            (0.74)
      Net impairment charges recognized
       in earnings                                  -              0.85
      Foreign exchange loss                      0.03              0.01
                                                 ----              ----
    Operating income                            $1.23             $2.79
                                                =====             =====

    Diluted per share data
    Net income                                  $2.52             $2.57
      Net realized investment gains             (1.38)            (0.71)
      Net impairment charges recognized
       in earnings                                  -              0.82
      Foreign exchange loss                      0.02              0.01
                                                 ----              ----
    Operating income                            $1.16             $2.69
                                                =====             =====

    ALLIED WORLD ASSURANCE COMPANY HOLDINGS, LTD
    UNAUDITED  DILUTED BOOK VALUE PER SHARE RECONCILIATION
    (Expressed in thousands of United States dollars,
     except share and per share amounts)

                                          As of            As of       As of
                                       March 31,     December 31,   March 31,
                                           2010             2009        2009
                                           ----             ----        ----
    Price per share at period
     end                                 $44.85           $46.07      $38.03

    Total shareholders' equity        3,338,807        3,213,295   2,491,860

    Basic common shares
     outstanding                     50,459,000       49,734,487  49,522,766

    Add: unvested restricted
     share units                        801,540          915,432     954,292

    Add:  Performance based
     equity awards                    1,409,984        1,583,237   1,332,161

    Add:  dilutive options/
     warrants outstanding             6,702,546        6,805,157   6,268,818
      Weighted average exercise
       price per share                    34.53            34.44       33.42
    Deduct: options bought
     back via treasury method        (5,159,746)      (5,087,405) (5,509,056)
                                     ----------       ----------  ----------

    Common shares and common share
    equivalents outstanding          54,213,324       53,950,908  52,568,981

    Basic book value per
     common share                        $66.17           $64.61      $50.32
    Diluted book value per
     common share                        $61.59           $59.56      $47.40

    ALLIED WORLD ASSURANCE COMPANY HOLDINGS, LTD
    UNAUDITED ANNUALIZED RETURN ON SHAREHOLDERS' EQUITY RECONCILIATION
    (Expressed in thousands of United States dollars,
     except for percentage information)

                                                   Quarter Ended March 31,
                                                     2010            2009
                                                     ----            ----

    Opening shareholders' equity                  $3,213,295      $2,416,862
    Deduct: accumulated other
     comprehensive income                           (149,849)       (105,632)
                                                    --------        --------
    Adjusted opening shareholders' equity          3,063,446       2,311,230
                                                           -               -
    Closing shareholders' equity                  $3,338,807      $2,491,860
    Deduct: accumulated other
     comprehensive income                           (142,284)        (48,204)
                                                    --------         -------
    Adjusted closing shareholders' equity          3,196,523       2,443,656

    Average shareholders' equity                  $3,129,985      $2,377,443
                                                  ==========      ==========

    Net income available to shareholders            $133,740        $131,408
    Annualized net income available to
     shareholders                                    534,960         525,632

    Annualized return on average shareholders'
     equity - net income available to shareholders      17.1%           22.1%
                                                        ====            ====

    Operating income available to shareholders       $61,323        $137,604
    Annualized operating income available
     to shareholders                                 245,292         550,416

    Annualized return on average
     shareholders' equity - operating
     income available to shareholders                    7.8%           23.2%
                                                         ===            ====

Media: Faye Cook, Vice President, Marketing & Communications, +1-441-278-5406, faye.cook at awac.com; or Investors: Keith J. Lennox, Investor Relations Officer, +1-646-794-0750, keith.lennox at awac.com, both of Allied World Assurance Company Holdings, Ltd; Website: www.awac.com

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