Allied World Reports Record Net Income in Third Quarter 2010; 21.6% Year to Date Increase in Diluted Book Value Per Share

By Allied World Assurance Company Holdings Ltd, PRNE
Wednesday, November 3, 2010

PEMBROKE, Bermuda, November 4, 2010 - Allied World Assurance Company Holdings, Ltd (NYSE: AWH) today reported
net income of $254.5 million, or $5.21 per diluted share, for the third
quarter of 2010 compared to net income of $200.6 million, or $3.83 per
diluted share, for the third quarter of 2009. Net income for the nine months
ended September 30, 2010 was $572.2 million, or $11.03 per diluted share,
compared to net income of $445.6 million, or $8.62 per diluted share, for the
first nine months of 2009.

The company reported operating income of $143.6 million, or $2.94 per
diluted share, for the third quarter of 2010 compared to operating income of
$155.4 million, or $2.97 per diluted share, for the third quarter of 2009.
Operating income for the nine months ended September 30, 2010 was $300.5
million
, or $5.79 per diluted share, compared to operating income of $405.8
million
, or $7.85 per diluted share, for the first nine months of 2009.

President and Chief Executive Officer Scott Carmilani commented, "We are
pleased to deliver this growth in shareholder value by reporting record net
income for the quarter of $254.5 million. Through good returns on our
investment portfolio, recognizing redundancies in our underwriting portfolio
from prior underwriting efforts, and solid operating results for this quarter
and year, we are reporting a very strong annualized operating return on
shareholders' equity of 17.5% for the quarter. We also accelerated our share
repurchases during the quarter which has proven to be very effective given
the valuation of our stock. Our diluted book value increased 11% for the
quarter to $72.40 per share."

Mr. Carmilani continued, "We have achieved these impressive results while
continuing to broaden the spectrum of our product offerings and expanding our
international platform. Our strategy to combat the difficult market
environment has been to take steps to manage our business closer to its
sources of distribution in areas where we see attractive opportunities. Our
recently announced redomestication to Switzerland is another important step
consistent with this strategy."

Underwriting Results

Gross premiums written were $378.4 million in the third quarter of 2010,
a 5.8% decrease compared to $401.8 million in the third quarter of 2009. The
decrease in gross premiums written was primarily due to the renewal timing of
several large reinsurance treaties. For the nine months ended September 30,
2010
, gross premiums written totaled $1,376.5 million compared to $1,374.2
million
in the first nine months of last year. New business written in our
reinsurance and U.S. insurance segments has been largely offset by the
non-renewal of business that did not meet our underwriting requirements due
to inadequate pricing and/or terms and conditions.

Net premiums written were $302.2 million in the third quarter of 2010, a
5.9% decrease compared to $321.0 million in the third quarter of 2009,
consistent with the reduction in gross premiums written. For the nine months
ended September 30, 2010, net premiums written totaled $1,105.3 million, a
1.6% increase compared to $1,087.4 million in the first nine months of 2009.

The combined ratio was 70.3% in the third quarter of 2010 compared to
70.1% in the third quarter of 2009. The loss and loss expense ratio was 37.4%
in the third quarter of 2010 compared to 41.5% in the third quarter of 2009.
During the third quarter of 2010, the company recorded net favorable reserve
development on prior loss years of $101.4 million, a benefit of 29.9
percentage points to the company's loss and loss expense ratio for the
quarter. This compares to the third quarter of 2009, where the company
recorded net favorable reserve development on prior loss years of $73.5
million
, a benefit of 22.4 percentage points to the company's loss and loss
expense ratio for that quarter. Absent prior year reserve adjustments, the
loss and loss expense ratio for the third quarter of 2010 was 67.3%. This
ratio was impacted by $25.0 million of net losses, or 7.4 percentage points,
from major loss driven events occurring during the third quarter of 2010.

For the nine months ended September 30, 2010, the combined ratio was
85.6% compared to 76.0% in the first nine months of 2009. The loss and loss
expense ratio for the nine months ended September 30, 2010 was 53.9% compared
to 46.9% for the nine months ended September 30, 2009. For the first nine
months of 2010, the company recorded net favorable reserve development on
prior loss years of $230.6 million. This net favorable reserve development
benefited the company's loss and loss expense ratio by 22.7 points. This
compares to the first nine months of 2009, where the company recorded net
favorable reserve development on prior loss years of $170.3 million, a
benefit of 17.3 percentage points to the company's loss and loss expense
ratio for the first nine months of 2009. Absent the favorable reserve
development, the loss and loss expense ratio related to the current loss year
was 76.6%. This ratio was impacted by $141.5 million of net losses, or 13.9
percentage points, from major loss driven events occurring during the first
nine months of 2010.

The company's expense ratio was 32.9% for the third quarter of 2010
compared to 28.6% for the third quarter of 2009. The expense ratio was 31.7%
for the nine months ended September 30, 2010 compared to 29.1% in the first
nine months of 2009. These increases were primarily due to increases in our
overall staff count and increases in variable incentive compensation expenses
related to our record earnings and the increase in our share price.

Investment Results

The total return on the company's investment portfolio for the three and
nine months ended September 30, 2010 was approximately 2.4% and 6.3%,
respectively. Net investment income in the third quarter of 2010 was $59.5
million
, a decrease of 18.6% from the $73.0 million of net investment income
in the third quarter of 2009. For the nine months ended September 30, 2010,
net investment income was $194.0 million, a decrease of 14.7% from the $227.4
million
of net investment income in the first nine months of 2009. These
decreases were primarily the result of lower yields on our fixed maturity
securities and an increased allocation to hedge funds, which contribute to
our total return but carry no current yield. Annualized book yield through
September 30, 2010 was 3.4%, versus the annualized book yield through
September 30, 2009 of 4.3%.

The company recorded net realized investment gains of $116.9 million and
$289.4 million, respectively, for the three and nine months ended September
30, 2010
.

As of September 30, 2010 and December 31, 2009, net accumulated
unrealized gains were $111.8 million and $149.8 million, respectively.

Shareholders' Equity

As of September 30, 2010, our total shareholders' equity was $3.3
billion
, a 4.0% increase compared to $3.2 billion as of December 31, 2009,
primarily driven by strong investment returns, offset by the company's share
repurchase initiatives through September 2010.

The company's annualized net income return on average shareholders'
equity for the three and nine months ended September 30, 2010 was 31.0% and
24.2%, respectively. The company's annualized operating return on average
shareholders' equity for the three and nine months ended September 30, 2010
was 17.5% and 12.7%, respectively.

Share Repurchases

As of September 30, 2010, diluted book value per share was $72.40, an
increase of 21.6% compared to $59.56 as of December 31, 2009.

In May 2010, the company announced a $500 million share repurchase
program. During the third quarter 2010, the company repurchased 2,318,285 of
its common shares in the open market at an average repurchase price of $50.00
per share for an aggregate cost of $115.9 million. For the nine months ended
September 30, 2010, the company repurchased 3,399,326 of its common shares in
the open market at an average repurchase price of $48.54 per share for an
aggregate cost of $165.0 million.

On August 6, 2010, we repurchased 5,000,000 of our common shares for $250
million
, or $50.00 per share, in a privately negotiated transaction from GS
Capital Partners and other investment funds, which are affiliates of The
Goldman Sachs Group, Inc ("Goldman Sachs"), and founding shareholders of our
company. The shares repurchased were not cancelled and were classified as
treasury shares. On August 13, 2010, we repurchased a warrant owned by The
Chubb Corporation ("Chubb") in a privately negotiated transaction. The
warrant entitled Chubb to purchase 2,000,000 common shares for $34.20 per
share. We repurchased the warrant for an aggregate purchase price of $32.8
million
. After this repurchase, Chubb has no warrants remaining and no other
disclosed equity interest in the company. The repurchase of the warrant was
recognized as a reduction in shareholders' equity. Both of the aforementioned
transactions were funded using available cash on hand and were executed
separately from the Company's $500 million share repurchase program.

Through September 30, 2010, the share repurchases related to our share
repurchase program and repurchases from the affiliates of Goldman Sachs have
had an estimated $3.54 net accretive impact on diluted book value per share.

Quarterly and Special Dividends

Allied World announced today that its Board of Directors declared a
quarterly dividend of $0.20 per common share. The dividend will be payable on
November 26, 2010 to shareholders of record on November 15, 2010. In
addition, the company's Board of Directors also declared a contingent special
dividend of $0.25 per share related to the company's redomestication to
Switzerland which is expected to take place before the end of the calendar
year 2010. Under Swiss law, the company does not expect to be able to pay a
dividend until two months after the company's next annual meeting which is
expected to take place in early May 2011. This special dividend will provide
a dividend to shareholders for the interim period. This special dividend will
be payable on November 26, 2010 to shareholders of record on November 15,
2010
. The company will only pay the special dividend if it receives the
requisite shareholder approval of its proposed redomestication to Switzerland
and the other closing conditions set forth in the definitive proxy statement
filed with the U.S. Securities and Exchange Commission on October 14, 2010
are either waived or satisfied. Any holders of the company's common shares
who sell their shares regular way after the record date and prior to the
payment date for the special dividend will also be selling their right to
receive this dividend. Investors are encouraged to consult with their
financial advisers regarding the specific implications of buying or selling
the company's common shares on or before these dates.

Investment Supplement

Allied World will be providing additional information on its investment
portfolio as of September 30, 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 third 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, November 5, 2010 at
8:00 a.m. (Eastern Time) to discuss the third 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 (866)-843-0890 (U.S.
and Canada callers) or +1-(412)-317-9250 (international callers) and entering
the passcode 9988847 approximately ten minutes prior to the call.

Following the conclusion of the presentation, a replay of the call will
be available through Friday, November 19, 2010 by dialing (877)-344-7529
(U.S. and Canada callers) or +1-(412)-317-0088 (international callers) and
entering the passcode 444951. In addition, the webcast will remain available
online through Friday, November 19, 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 and 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 an important measure of calculating shareholder returns.

"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 credit spread
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 a global
network of branches and affiliates. Our insurance and reinsurance
subsidiaries are rated A (Excellent) by A.M. Best Company, and our Lloyd's
Syndicate 2232 is rated A+ (Strong) by Standard & Poor's and Fitch. Please
visit our website at www.awac.com for further information on Allied
World.

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; 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
                                                September 30,
                                               2010        2009
                                               ----        ----
    Revenues:
      Gross premiums written               $378,445    $401,837
      Premiums ceded                        (76,276)    (80,881)
                                            -------     -------

      Net premiums written                  302,169     320,956
      Change in unearned premiums            37,327       7,815
                                             ------       -----
      Net premiums earned                   339,496     328,771

      Net investment income                  59,479      73,032
      Net realized investment gains         116,930      46,861
      Net impairment charges recognized
       in earnings                                -      (1,953)
      Other income                                -         298
                                                ---         ---
      Total revenue                         515,905     447,009
                                            -------     -------
    Expenses:
      Net losses and loss expenses          126,988     136,441
      Acquisition costs                      41,919      36,630
      General and administrative
       expenses                              69,871      57,521
      Amortization and impairment of
       intangible assets                        892       1,065
      Interest expense                        9,533       9,523
      Foreign exchange (gain) loss           (1,387)       (273)
                                             ------        ----
      Total expenses                        247,816     240,907
                                            -------     -------
    Income before income taxes              268,089     206,102
      Income tax expense                     13,569       5,548
                                             ------       -----
    NET INCOME                             $254,520    $200,554
                                           ========    ========

    PER SHARE DATA:
      Basic earnings per share                $5.59       $4.05
      Diluted earnings per share              $5.21       $3.83

      Weighted average common shares
       outstanding                       45,544,060  49,574,266
      Weighted average common shares
       and common share equivalents
       outstanding                       48,839,991  52,345,913

      Dividends declared per share            $0.20       $0.18

                                               Nine Months Ended
                                                  September 30,
                                               2010          2009
                                               ----          ----

    Revenues:
      Gross premiums written             $1,376,455    $1,374,216
      Premiums ceded                       (271,199)     (286,785)
                                           --------      --------

      Net premiums written                1,105,256     1,087,431
      Change in unearned premiums           (88,512)     (101,020)
                                            -------      --------
      Net premiums earned                 1,016,744       986,411

      Net investment income                 193,975       227,423
      Net realized investment gains         289,350        88,556
      Net impairment charges recognized
       in earnings                             (168)      (49,390)
      Other income                              913         1,133
                                                ---         -----
      Total revenue                       1,500,814     1,254,133
                                          ---------     ---------
    Expenses:
      Net losses and loss expenses          547,864       462,657
      Acquisition costs                     120,641       110,721
      General and administrative
       expenses                             201,423       176,380
      Amortization and impairment of
       intangible assets                      2,675         3,195
      Interest expense                       28,592        29,492
      Foreign exchange (gain) loss              248          (660)
                                                ---          ----
      Total expenses                        901,443       781,785
                                            -------       -------
    Income before income taxes              599,371       472,348
      Income tax expense                     27,152        26,716
                                             ------        ------
    NET INCOME                             $572,219      $445,632
                                           ========      ========

    PER SHARE DATA:
      Basic earnings per share               $11.78         $9.01
      Diluted earnings per share             $11.03         $8.62

      Weighted average common shares
       outstanding                       48,580,541    49,449,809
      Weighted average common shares
       and common share equivalents
       outstanding                       51,887,390    51,676,006

      Dividends declared per share            $0.60         $0.54
    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
                                                                September
                                                                 30, 2010
                                                                ---------
    ASSETS:
    Fixed maturity investments available for sale, at
     fair value (amortized cost: 2010: $1,445,143;
     2009: $4,260,844)                                         $1,570,144
    Fixed maturity investments trading, at fair value           5,231,358
    Other invested assets trading, at fair value                  450,015
                                                                  -------

    Total investments                                           7,251,517
    Cash and cash equivalents                                     831,444
    Insurance balances receivable                                 466,887
    Prepaid reinsurance                                           187,292
    Reinsurance recoverable                                       939,956
    Accrued investment income                                      43,286
    Net deferred acquisition costs                                102,300
    Goodwill                                                      268,376
    Intangible assets                                              57,684
    Net balances receivable on purchases and sales of
     investments                                                        -
    Net deferred tax assets                                         9,633
    Other assets                                                   58,086
                                           Total assets       $10,216,461
                                                              -----------

    LIABILITIES:
    Reserve for losses and loss expenses                       $4,889,825
    Unearned premiums                                           1,017,814
    Reinsurance balances payable                                   97,147
    Net balances payable on purchases and sales of
     investments                                                  307,140
    Senior notes                                                  499,017
    Accounts payable and accrued liabilities                       64,204
                                      Total liabilities        $6,875,147
                                                               ----------

    SHAREHOLDERS' EQUITY:
    Common shares, par value $0.03 per share  (2010:
     50,793,902; 2009: 49,734,487 shares issued and
     2010: 42,394,576;  2009: 49,734,487 shares
     outstanding)                                                  $1,524
    Additional paid-in capital                                  1,355,685
    Treasury shares, at cost (2010: 8,399,326, 2009:
     nil)                                                        (415,009)
    Retained earnings                                           2,287,354
    Accumulated other comprehensive income, net of tax            111,760
                                                                  -------
                             Total shareholders' equity        $3,341,314
                                                               ----------

             Total liabilities and shareholders' equity       $10,216,461
                                                              ===========

                                                                 As of
                                                               December
                                                               31, 2009
                                                               --------
    ASSETS:
    Fixed maturity investments available for sale, at
     fair value (amortized cost: 2010: $1,445,143;
     2009: $4,260,844)                                       $4,427,072
    Fixed maturity investments trading, at fair value         2,544,322
    Other invested assets trading, at fair value                184,869
                                                                -------

    Total investments                                         7,156,263
    Cash and cash equivalents                                   379,751
    Insurance balances receivable                               395,621
    Prepaid reinsurance                                         186,610
    Reinsurance recoverable                                     919,991
    Accrued investment income                                    53,046
    Net deferred acquisition costs                               87,821
    Goodwill                                                    268,376
    Intangible assets                                            60,359
    Net balances receivable on purchases and sales of
     investments                                                    184
    Net deferred tax assets                                      21,895
    Other assets                                                 67,566
                                           Total assets      $9,597,483
                                                             ----------

    LIABILITIES:
    Reserve for losses and loss expenses                     $4,761,772
    Unearned premiums                                           928,619
    Reinsurance balances payable                                102,837
    Net balances payable on purchases and sales of
     investments                                                      -
    Senior notes                                                498,919
    Accounts payable and accrued liabilities                     92,041
                                      Total liabilities      $6,384,188
                                                             ----------

    SHAREHOLDERS' EQUITY:
    Common shares, par value $0.03 per share  (2010:
     50,793,902; 2009: 49,734,487 shares issued and
     2010: 42,394,576;  2009: 49,734,487 shares
     outstanding)                                                $1,492
    Additional paid-in capital                                1,359,934
    Treasury shares, at cost (2010: 8,399,326, 2009:
     nil)                                                             -
    Retained earnings                                         1,702,020
    Accumulated other comprehensive income, net of tax          149,849
                                                                -------
                             Total shareholders' equity      $3,213,295
                                                             ----------

             Total liabilities and shareholders' equity      $9,597,483
                                                             ==========
    ALLIED WORLD ASSURANCE COMPANY HOLDINGS, LTD
    UNAUDITED CONSOLIDATED SEGMENT DATA

    (Expressed in thousands of United States dollars, except for ratio
     information)

                                         U.S.      International
                                      Insurance      Insurance    Reinsurance
    Quarter Ended September 30,
     2010
    ---------------------------

    Gross premiums written            $181,232        $100,858       $96,355
    Net premiums written               140,481          65,520        96,168
    Net premiums earned                129,650          80,557       129,289
    Other income                             -               -             -
    Net losses and loss expenses       (55,144)        (11,040)      (60,804)
    Acquisition costs                  (18,081)             29       (23,867)
    General and administrative
     expenses                          (31,781)        (22,819)      (15,271)
                                       -------         -------       -------
    Underwriting income                 24,644          46,727        29,347
    Net investment income
    Net realized investment gains
        Net impairment charges
         recognized in earnings
    Amortization and impairment of
           intangible assets
    Interest expense
    Foreign exchange gain
    Income before income taxes

    GAAP Ratios:
    Loss and loss expense ratio           42.5%           13.7%         47.0%
    Acquisition cost ratio                13.9%            0.0%         18.5%
    General and administrative
     expense ratio                        24.5%           28.3%         11.8%
    Combined ratio                        80.9%           42.0%         77.3%
                                          ====            ====          ====

                                         U.S.      International
                                      Insurance      Insurance    Reinsurance
    Quarter Ended September 30,
     2009
    ---------------------------

    Gross premiums written            $169,629        $107,768      $124,440
    Net premiums written               126,600          69,939       124,417
    Net premiums earned                111,558          97,705       119,508
    Other income                           298               -             -
    Net losses and loss expenses       (42,071)        (28,301)      (66,069)
    Acquisition costs                  (14,354)           (516)      (21,760)
    General and administrative
     expenses                          (25,929)        (19,866)      (11,726)
                                       -------         -------       -------
    Underwriting income                 29,502          49,022        19,953
    Net investment income
    Net realized investment gains
        Net impairment charges
         recognized in earnings
    Amortization and impairment of
           intangible assets
    Interest expense
    Foreign exchange gain
    Income before income taxes

    GAAP Ratios:
    Loss and loss expense ratio           37.7%           29.0%         55.3%
    Acquisition cost ratio                12.9%            0.5%         18.2%
    General and administrative
     expense ratio                        23.2%           20.3%          9.8%
                                          ----            ----           ---
    Combined ratio                        73.8%           49.8%         83.3%
                                          ====            ====          ====

                                        Total
    Quarter Ended September 30,
     2010
    ---------------------------

    Gross premiums written            $378,445
    Net premiums written               302,169
    Net premiums earned                339,496
    Other income                             -
    Net losses and loss expenses      (126,988)
    Acquisition costs                  (41,919)
    General and administrative
     expenses                          (69,871)
                                       -------
    Underwriting income                100,718
    Net investment income               59,479
    Net realized investment gains      116,930
        Net impairment charges
         recognized in earnings              -
    Amortization and impairment of
           intangible assets              (892)
    Interest expense                    (9,533)
    Foreign exchange gain                1,387
                                         -----
    Income before income taxes        $268,089
                                      ========

    GAAP Ratios:
    Loss and loss expense ratio           37.4%
    Acquisition cost ratio                12.3%
    General and administrative
     expense ratio                        20.6%
    Combined ratio                        70.3%
                                          ====

                                        Total
    Quarter Ended September 30,
     2009
    ---------------------------

    Gross premiums written            $401,837
    Net premiums written               320,956
    Net premiums earned                328,771
    Other income                           298
    Net losses and loss expenses      (136,441)
    Acquisition costs                  (36,630)
    General and administrative
     expenses                          (57,521)
                                       -------
    Underwriting income                 98,477
    Net investment income               73,032
    Net realized investment gains       46,861
        Net impairment charges
         recognized in earnings         (1,953)
    Amortization and impairment of
           intangible assets            (1,065)
    Interest expense                    (9,523)
    Foreign exchange gain                  273
                                           ---
    Income before income taxes        $206,102
                                      ========

    GAAP Ratios:
    Loss and loss expense ratio           41.5%
    Acquisition cost ratio                11.1%
    General and administrative
     expense ratio                        17.5%
                                          ----
    Combined ratio                        70.1%
                                          ====
    ALLIED WORLD ASSURANCE COMPANY HOLDINGS, LTD
    UNAUDITED CONSOLIDATED SEGMENT DATA

    (Expressed in thousands of United States dollars, except for ratio
     information)

                                         U.S.       International
                                      Insurance       Insurance   Reinsurance
    Nine Months Ended September 30,
     2010
    -------------------------------

    Gross premiums written             $532,980        $389,881     $453,594
    Net premiums written                407,274         245,110      452,872
    Net premiums earned                 384,514         257,027      375,203
    Other income                            913               -            -
    Net losses and loss expenses       (222,767)       (133,069)    (192,028)
    Acquisition costs                   (50,895)             29      (69,775)
    General and administrative
     expenses                           (89,578)        (67,321)     (44,524)
                                        -------         -------      -------
    Underwriting income                  22,187          56,666       68,876
    Net investment income
    Net realized investment gains
    Net impairment charges
     recognized in earnings
    Amortization and impairment of
     intangible assets
    Interest expense
    Foreign exchange loss
    Income before income taxes

    GAAP Ratios:
    Loss and loss expense ratio            57.9%           51.8%        51.2%
    Acquisition cost ratio                 13.2%            0.0%        18.6%
    General and administrative
     expense ratio                         23.3%           26.2%        11.9%
    Combined ratio                         94.4%           78.0%        81.7%
                                           ====            ====         ====

                                         U.S.       International
                                      Insurance       Insurance    Reinsurance
    Nine Months Ended September 30,
     2009
    -------------------------------

    Gross premiums written             $505,710        $425,672     $442,834
    Net premiums written                369,912         275,066      442,453
    Net premiums earned                 327,850         320,706      337,855
    Other income                          1,133               -            -
    Net losses and loss expenses       (143,090)       (141,595)    (177,972)
    Acquisition costs                   (42,308)         (3,243)     (65,170)
    General and administrative
     expenses                           (83,323)        (58,599)     (34,458)
                                        -------         -------      -------
    Underwriting income                  60,262         117,269       60,255
    Net investment income
    Net realized investment gains
    Net impairment charges
     recognized in earnings
    Amortization and impairment of
     intangible assets
    Interest expense
    Foreign exchange gain
    Income before income taxes

    GAAP Ratios:
    Loss and loss expense ratio            43.6%           44.2%        52.7%
    Acquisition cost ratio                 12.9%            1.0%        19.3%
    General and administrative
     expense ratio                         25.4%           18.3%        10.2%
                                           ----            ----         ----
    Combined ratio                         81.9%           63.5%        82.2%
                                           ====            ====         ====

                                       Total
    Nine Months Ended September 30,
     2010
    -------------------------------

    Gross premiums written           $1,376,455
    Net premiums written              1,105,256
    Net premiums earned               1,016,744
    Other income                            913
    Net losses and loss expenses       (547,864)
    Acquisition costs                  (120,641)
    General and administrative
     expenses                          (201,423)
                                       --------
    Underwriting income                 147,729
    Net investment income               193,975
    Net realized investment gains       289,350
    Net impairment charges
     recognized in earnings                (168)
    Amortization and impairment of
     intangible assets                   (2,675)
    Interest expense                    (28,592)
    Foreign exchange loss                  (248)
                                           ----
    Income before income taxes         $599,371
                                       ========

    GAAP Ratios:
    Loss and loss expense ratio            53.9%
    Acquisition cost ratio                 11.9%
    General and administrative
     expense ratio                         19.8%
    Combined ratio                         85.6%
                                           ====

                                       Total
    Nine Months Ended September 30,
     2009
    -------------------------------

    Gross premiums written           $1,374,216
    Net premiums written              1,087,431
    Net premiums earned                 986,411
    Other income                          1,133
    Net losses and loss expenses       (462,657)
    Acquisition costs                  (110,721)
    General and administrative
     expenses                          (176,380)
                                       --------
    Underwriting income                 237,786
    Net investment income               227,423
    Net realized investment gains        88,556
    Net impairment charges
     recognized in earnings             (49,390)
    Amortization and impairment of
     intangible assets                   (3,195)
    Interest expense                    (29,492)
    Foreign exchange gain                   660
                                            ---
    Income before income taxes         $472,348
                                       ========

    GAAP Ratios:
    Loss and loss expense ratio            46.9%
    Acquisition cost ratio                 11.2%
    General and administrative
     expense ratio                         17.9%
                                           ----
    Combined ratio                         76.0%
                                           ====
    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
                                                    September 30,
                                                  2010        2009
                                                  ----        ----

    Net income                                $254,520    $200,554
    Add after tax affect of:
      Net realized investment gains           (109,581)    (46,861)
      Net impairment charges recognized in
       earnings                                      -       1,953
      Foreign exchange (gain)/loss              (1,387)       (273)
                                                ------        ----
    Operating income                          $143,552    $155,373
                                              ========    ========

    Weighted average common shares
     outstanding:
    Basic                                   45,544,060  49,574,266
    Diluted                                 48,839,991  52,345,913

    Basic per share data:
    Net income                                   $5.59       $4.05
    Add after tax affect of:
      Net realized investment gains              (2.41)      (0.95)
      Net impairment charges recognized in
       earnings                                      -        0.04
      Foreign exchange (gain)/loss               (0.03)      (0.01)
                                                 -----       -----
    Operating income                             $3.15       $3.13
                                                 =====       =====

    Diluted per share data
    Net income                                   $5.21       $3.83
    Add after tax affect of:
      Net realized investment gains              (2.24)      (0.89)
      Net impairment charges recognized in
       earnings                                      -        0.04
      Foreign exchange (gain)/loss               (0.03)      (0.01)
                                                 -----       -----
    Operating income                             $2.94       $2.97
                                                 =====       =====

                                                   Nine Months Ended
                                                     September 30,
                                                   2010         2009
                                                   ----         ----

    Net income                                 $572,219     $445,632
    Add after tax affect of:
      Net realized investment gains            (272,033)     (88,556)
      Net impairment charges recognized in
       earnings                                     109       49,390
      Foreign exchange (gain)/loss                  248         (660)
                                                    ---         ----
    Operating income                           $300,543     $405,806
                                               ========     ========

    Weighted average common shares
     outstanding:
    Basic                                    48,580,541   49,449,809
    Diluted                                  51,887,390   51,676,006

    Basic per share data:
    Net income                                   $11.78        $9.01
    Add after tax affect of:
      Net realized investment gains               (5.60)       (1.79)
      Net impairment charges recognized in
       earnings                                       -         1.00
      Foreign exchange (gain)/loss                 0.01        (0.01)
                                                   ----        -----
    Operating income                              $6.19        $8.21
                                                  =====        =====

    Diluted per share data
    Net income                                   $11.03        $8.62
    Add after tax affect of:
      Net realized investment gains               (5.24)       (1.72)
      Net impairment charges recognized in
       earnings                                       -         0.96
      Foreign exchange (gain)/loss                    -        (0.01)
                                                    ---        -----
    Operating income                              $5.79        $7.85
                                                  =====        =====
    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
                                                September        December
                                                      30,             31,
                                                     2010            2009
                                                     ----            ----
    Price per share at period end                  $56.59          $46.07

    Total shareholders' equity                 $3,341,314      $3,213,295

    Basic common shares outstanding            42,394,576      49,734,487

    Add: unvested restricted share units          580,706         915,432

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

    Add:  dilutive options/warrants
     outstanding                                4,563,380       6,805,157
      Weighted average exercise price per
       share                                       $34.69          $34.44
    Deduct: options bought back via
     treasury method                           (2,797,512)    (5,087,405)
                                               ----------      ----------

    Common shares and common share
    equivalents outstanding                    46,151,134      53,950,908

    Basic book value per common share              $78.81          $64.61
    Diluted book value per common share            $72.40          $59.56

                                                    As of
                                                September
                                                      30,
                                                     2009
                                                     ----
    Price per share at period end                  $47.93

    Total shareholders' equity                 $3,078,894

    Basic common shares outstanding            49,602,354

    Add: unvested restricted share units          925,437

    Add:  Performance based equity awards       1,329,661

    Add:  dilutive options/warrants
     outstanding                                6,951,447
      Weighted average exercise price per
       share                                       $34.34
    Deduct: options bought back via
     treasury method                           (4,980,125)
                                               ----------

    Common shares and common share
    equivalents outstanding                    53,828,774

    Basic book value per common share              $62.07
    Diluted book value per common share            $57.20
    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
                                                              September 30,
                                                            2010        2009
                                                            ----        ----

    Opening shareholders' equity                      $3,468,543  $2,741,427
    Deduct: accumulated other comprehensive income      (138,245)    (48,669)
                                                        --------     -------
    Adjusted opening shareholders' equity              3,330,298   2,692,758
                                                               -           -
    Closing shareholders' equity                      $3,341,314  $3,078,894
    Deduct: accumulated other comprehensive income      (111,760)   (185,043)
                                                        --------    --------
    Adjusted closing shareholders' equity              3,229,554   2,893,851

    Average shareholders' equity                      $3,279,926  $2,793,305
                                                      ==========  ==========

    Net  income available to shareholders               $254,520    $200,554
    Annualized net income available to shareholders    1,018,080     802,216

    Annualized return on average shareholders'
     equity -net income available to shareholders           31.0%       28.7%
                                                            ====        ====

    Operating income available to shareholders          $143,552    $155,373
    Annualized operating income available to
     shareholders                                        574,208     621,492

    Annualized return on average shareholders'
     equity -operating income available to
     shareholders                                           17.5%       22.2%
                                                            ====        ====

                                                          Nine Months Ended
                                                             September 30,
                                                          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                    $3,341,314    $3,078,894
    Deduct: accumulated other comprehensive income    (111,760)     (185,043)
                                                      --------      --------
    Adjusted closing shareholders' equity            3,229,554     2,893,851

    Average shareholders' equity                    $3,146,500    $2,602,541
                                                    ==========    ==========

    Net  income available to shareholders             $572,219      $445,632
    Annualized net income available to shareholders    762,959       594,176

    Annualized return on average shareholders'
     equity -net income available to shareholders         24.2%         22.8%
                                                          ====          ====

    Operating income available to shareholders        $300,543      $405,806
    Annualized operating income available to
     shareholders                                      400,724       541,075

    Annualized return on average shareholders'
     equity -operating income available to
     shareholders                                         12.7%         20.8%
                                                          ====          ====

Media: Faye Cook, Vice President, Marketing & Communications, +1-441-278-5406, faye.cook at awac.com; Investors: Keith J. Lennox, Investor Relations Officer, +1-646-794-0750, keith.lennox at awac.com

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