Allied World Reports Record Net Income of $665 Million in 2010; Grows Book Value Per Share by 25% for Year

By Allied World Assurance Company Holdings Ag, PRNE
Wednesday, February 16, 2011

ZUG, Switzerland, February 17, 2011 - Allied World Assurance Company Holdings, AG (NYSE: AWH) today reported
record net income of $665.0 million, or $13.32 per diluted share, for the
year ended December 31, 2010 compared to net income of $606.9 million, or
$11.67 per diluted share, for the year ended December 31, 2009. Net income
for the fourth quarter of 2010 was $92.8 million, or $2.13 per diluted share,
compared to net income of $161.3 million, or $3.05 per diluted share, for the
fourth quarter of 2009.

The company reported operating income of $397.8 million, or $7.97 per
diluted share, for the year ended December 31, 2010 compared to operating
income of $537.7 million, or $10.34 per diluted share, for the year ended
December 31, 2009. Operating income for the fourth quarter of 2010 was $97.3
million
, or $2.24 per diluted share, compared to operating income of $131.9
million
, or $2.49 per diluted share, for the fourth quarter of 2009.

President and Chief Executive Officer Scott Carmilani commented, "The
insurance industry continued to face significant hurdles throughout 2010. In
addition to the heightened rate pressure caused by strong competition and an
overabundance of capacity, multiple global catastrophes increased loss costs
while generally weak economic conditions posed additional challenges. In
spite of these factors, we are very proud of our financial, strategic and
operational accomplishments throughout the year."

"We grew book value per share by 25% producing a record net income of
$665 million for the year. Just as importantly, we've improved our
positioning for the future by redomiciling our holding company to
Switzerland, establishing our own Lloyd's Syndicate 2232 for broader
distribution, and further diversifying our products and service capabilities,
while lowering our dependence on more volatile segments of the market. In
aggregate, these initiatives have helped us generate $197 million in gross
revenues from new products and geographies that allowed us to modestly
increase our gross premiums written by 4% for the year."

Mr. Carmilani continued, "We were also very successful on the capital
management front during 2010 as we took advantage of our depressed valuation
position and deployed significant excess capital to the benefit of our
shareholders. We further enhanced our capital flexibility during the fourth
quarter through the issuance of $300 million of senior notes, which were at a
very favorable interest rate and very well received by the fixed income
market. The company begins 2011 in a strong capital position, which provides
security to our current policyholders while leaving us with the flexibility
to pursue additional potential opportunities for profitable growth."

Underwriting Results

Gross premiums written were $381.9 million in the fourth quarter of 2010,
an 18.6% increase compared to $322.1 million in the fourth quarter of 2009.
For the year ended December 31, 2010, gross premiums written totaled $1,758.4
million
, a 3.7% increase compared to $1,696.3 million for the year ended
December 31, 2009. Net premiums written were $287.2 million in the fourth
quarter of 2010, a 22.9% increase compared to $233.7 million in the fourth
quarter of 2009. For the year ended December 31, 2010, net premiums written
totaled $1,392.5 million, a 5.4% increase compared to $1,321.1 million for
the year ended December 31, 2009. These increases were primarily due to the
expansion of our reinsurance and U.S. insurance business offset by our
selectively paring back general property, energy and professional liability
risks in our international insurance segment that did not meet our
underwriting requirements.

Net premiums earned in the fourth quarter of 2010 were $342.8 million, a
3.7% increase compared to $330.5 million in the fourth quarter of 2009. For
the year ended December 31, 2010, net premiums earned totaled $1,359.5
million
, a 3.2% increase from net premiums earned of $1,316.9 million for the
year ended December 31, 2009. These increases were primarily due to the
expansion of our reinsurance and U.S. insurance business.

The combined ratio was 82.8% in the fourth quarter of 2010 compared to
76.2% in the fourth quarter of 2009. The loss and loss expense ratio was
46.7% in the fourth quarter of 2010 compared to 42.8% in the fourth quarter
of 2009. During the fourth quarter of 2010, the company recorded net
favorable reserve development on prior loss years of $73.9 million, a benefit
of 21.6 percentage points to the company's loss and loss expense ratio for
the quarter. This compares to the fourth quarter of 2009, where the company
recorded net favorable reserve development on prior loss years of $77.7
million
, a benefit of 23.5 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 related to the fourth quarter of 2010 was 68.3%
compared to 66.3% for the fourth quarter of 2009. The fourth quarter 2010
ratio was impacted by $21.4 million of net losses, or 6.2 percentage points,
from major loss driven events occurring during 2010.

For the year ended December 31, 2010, the combined ratio was 84.9%
compared to 76.1% for the year ended December 31, 2009. For the year ended
December 31, 2010, the company recorded net favorable reserve development on
prior loss years of $313.3 million, a benefit of 23.1 percentage points to
the company's loss and loss expense ratio. For the year ended December 31,
2009
, the company recorded net favorable reserve development on prior loss
years of $248.0 million, a benefit of 18.8 percentage points to the company's
loss and loss expense ratio. Absent prior year reserve adjustments, the loss
and loss expense ratio related to 2010 was 75.2% compared to 64.7% for 2009.
This ratio was impacted by $164.6 million of net losses, or 12.1 percentage
points, from major loss driven events occurring during 2010.

The company's expense ratio was 36.1% for the fourth quarter of 2010
compared to 33.4% for the fourth quarter of 2009. The expense ratio was 32.8%
for the year ended December 31, 2010 compared to 30.2% for the year ended
December 31, 2009. Included in our expenses are significant one-time expenses
incurred in connection with our redomestication to Switzerland, the
establishment of our new Lloyd's syndicate, as well as an increase in our
incentive compensation expenses as a result of our exceeding our compensation
targets. Without these items our expense ratio for the fourth quarter of 2010
would have been 33.4%.

Investment Results

The total return on the company's investment portfolio for the three
months and year ended December 31, 2010 was a loss of 0.2% and gain of 6.1%,
respectively. Net investment income in the fourth quarter of 2010 was $50.2
million
, a decrease of 31.5% from the $73.3 million of net investment income
in the fourth quarter of 2009. For the year ended December 31, 2010, net
investment income was $244.1 million, a decrease of 18.8% from the $300.7
million
of net investment income for the year ended December 31, 2009. These
decreases were due to a combination of use of funds for share repurchases,
lower yields on our fixed maturity investments and an increased allocation to
hedge funds, which contribute to our total return but carry no current yield.
The book yield for the year ended December 31, 2010 was 3.3%, versus the
annualized book yield for the year ended December 31, 2009 of 4.2%.

The company recorded net realized investment losses of $3.7 million and
net realized investment gains of $285.6 million, respectively, for the three
months and year ended December 31, 2010.

As of December 31, 2010 and December 31, 2009, net accumulated unrealized
gains were $57.1 million and $149.8 million, respectively.

Shareholders' Equity

As of December 31, 2010, shareholders' equity was $3.1 billion, a
decrease of 4.3% compared to $3.2 billion reported as of December 31, 2009.
The decrease was primarily the result of our share repurchase activities
during the year partially offset by net income for the year ended December
31, 2010
of $665.0 million, driven primarily by strong investment returns.

The company's annualized net income return on average shareholders'
equity for the three months and year ended December 31, 2010 was 11.9% and
21.9%, respectively. The company's annualized operating return on average
shareholders' equity for the three months and year ended December 31, 2010
was 12.5% and 13.1%, respectively.

Share Repurchases

As of December 31, 2010, diluted book value per share was $74.29, an
increase of 2.6% and 24.7% compared to $72.40 and $59.56, respectively, as of
September 30, 2010 and December 31, 2009.

In May 2010, the company announced a share repurchase program. During the
fourth quarter 2010, the company repurchased 1,251,953 of its common shares
in the open market at an average repurchase price of $59.20 per share for an
aggregate cost of $74.1 million. For the year ended December 31, 2010, the
company repurchased 4,651,279 of its common shares through its program in the
open market at an average repurchase price of $51.41 per share for an
aggregate cost of $239.1 million.

On November 6, 2010, the company repurchased the remainder of securities
held by certain GS Capital Partners and other investment funds, which are
affiliates of The Goldman Sachs Group, Inc ("Goldman Sachs"), and founding
shareholders of our company. These securities consist of 3,159,793 common
shares and warrants to purchase an additional 1,500,000 common shares from
Goldman Sachs. The aggregate repurchase price for these securities was $222.6
million
. The transaction was funded using available cash on hand and was
executed separately from the company's share repurchase program.

Through December 31, 2010, the share repurchases related to our share
repurchase program and repurchases from the affiliates of Goldman Sachs have
had an estimated $5.11 net accretive impact on diluted book value per share.

On February 3, 2011, the company repurchased a warrant owned by American
International Group, Inc. ("AIG"), a founding shareholder, which entitled AIG
to purchase a total of 2,000,000 common shares. The aggregate repurchase
price was $53.6 million. The transaction was funded using available cash on
hand and was executed separately from the company's share repurchase program.

Quarterly Dividend

On November 26, 2010, the board of directors declared a special dividend
of $0.25 per common share related to the company's redomestication to
Switzerland. This special dividend was paid on November 26, 2010 to
shareholders of record on November 15, 2010. Under Swiss law, the company
will not be able to pay another dividend until two months after the company's
next annual meeting which is expected to take place in early May 2011. This
special dividend provided a dividend to shareholders for the interim period
until the next dividend can be paid.

Investment Supplement

Allied World will be providing additional information on its investment
portfolio as of December 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 fourth 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, February 18, 2011 at
9:00 a.m. (Eastern Time) to discuss the results for the fourth quarter and
year ended December 31, 2010. 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 1-877-317-6701 (U.S. and Canada callers) or +1-412-317-6701
(international callers) and entering the passcode 8832831 approximately ten
minutes prior to the call.

Following the conclusion of the presentation, a replay of the call will
be available through Friday, March 4, 2011 by dialing 1-877-344-7529 (U.S.
and Canada callers) or +1-412-317-0088 (international callers) and entering
the passcode 447223. In addition, the webcast will remain available online
through Friday, March 4, 2011 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. 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 U.S. 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 U.S. GAAP measures are included in the attached tables.

About Allied World Assurance Company

Allied World Assurance Company Holdings, AG, 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, AG
               UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS
           (Expressed in thousands of United States dollars, except share and
                                   per share amounts)

                                                       Quarter Ended
                                                        December 31,
                                                      2010        2009
                                                      ----        ----

    Revenues:
      Gross premiums written                      $381,942    $322,129
      Premiums ceded                               (94,743)    (88,435)
                                                   -------     -------

      Net premiums written                         287,199     233,694
      Change in unearned premiums                   55,605      96,787
                                                    ------      ------
      Net premiums earned                          342,804     330,481

      Net investment income                         50,168      73,252
      Net realized investment (losses)
       gains                                        (3,738)     37,796
      Net impairment charges recognized in
       earnings                                          -        (187)
      Other income                                       -         373
                                                       ---         ---
      Total revenue                                389,234     441,715
                                                   -------     -------
    Expenses:
      Net losses and loss expenses                 160,019     141,403
      Acquisition costs                             38,848      38,126
      General and administrative expenses           85,134      72,212
      Amortization and impairment of
       intangible assets                               808       7,856
      Interest expense                              11,650       9,527
      Foreign exchange loss                            196       1,408
                                                       ---       -----
      Total expenses                               296,655     270,532
                                                   -------     -------
    Income before income taxes                      92,579     171,183
      Income tax (benefit) expense                    (207)      9,928
                                                      ----       -----
    NET INCOME                                     $92,786    $161,255
                                                   =======    ========

    PER SHARE DATA:
      Basic earnings per share                       $2.30       $3.25
      Diluted earnings per share                     $2.13       $3.05

      Weighted average common shares
       outstanding                              40,291,620  49,662,575
      Weighted average common shares and
       common share equivalents outstanding     43,501,068  52,880,733

      Dividends declared per share                   $0.45       $0.20

                                                    Year Ended December
                                                             31,
                                                      2010        2009
                                                      ----        ----

    Revenues:
      Gross premiums written                    $1,758,397  $1,696,345
      Premiums ceded                              (365,942)   (375,220)
                                                  --------    --------

      Net premiums written                       1,392,455   1,321,125
      Change in unearned premiums                  (32,907)     (4,233)
                                                   -------      ------
      Net premiums earned                        1,359,548   1,316,892

      Net investment income                        244,143     300,675
      Net realized investment (losses)
       gains                                       285,612     126,352
      Net impairment charges recognized in
       earnings                                       (168)    (49,577)
      Other income                                     913       1,506
                                                       ---       -----
      Total revenue                              1,890,048   1,695,848
                                                 ---------   ---------
    Expenses:
      Net losses and loss expenses                 707,883     604,060
      Acquisition costs                            159,489     148,847
      General and administrative expenses          286,557     248,592
      Amortization and impairment of
       intangible assets                             3,483      11,051
      Interest expense                              40,242      39,019
      Foreign exchange loss                            444         748
                                                       ---         ---
      Total expenses                             1,198,098   1,052,317
                                                 ---------   ---------
    Income before income taxes                     691,950     643,531
      Income tax (benefit) expense                  26,945      36,644
                                                    ------      ------
    NET INCOME                                    $665,005    $606,887
                                                  ========    ========

    PER SHARE DATA:
      Basic earnings per share                      $14.30      $12.26
      Diluted earnings per share                    $13.32      $11.67

      Weighted average common shares
       outstanding                              46,491,279  49,503,438
      Weighted average common shares and
       common share equivalents outstanding     49,913,317  51,992,674

      Dividends declared per share                   $1.05       $0.74
                   ALLIED WORLD ASSURANCE COMPANY HOLDINGS, AG
                 UNAUDITED CONDENSED CONSOLIDATED BALANCE SHEETS
       (Expressed in thousands of United States dollars, except share and
                               per share amounts)

                                                           As of       As of
                                                          December   December
                                                            31,         31,
    ASSETS:                                                2010        2009
                                                           ----        ----
    Fixed maturity investments available for sale, at
     fair value (amortized cost: 2010: $828,544;
     2009: $4,260,844)                                   $891,849  $4,427,072
    Fixed maturity investments trading, at fair value   5,769,097   2,544,322
    Other invested assets trading, at fair value          522,608     184,869
                                                          -------     -------

    Total investments                                   7,183,554   7,156,263
    Cash and cash equivalents                             853,368     379,751
    Insurance balances receivable                         529,927     395,621
    Prepaid reinsurance                                   187,287     186,610
    Reinsurance recoverable                               927,588     919,991
    Accrued investment income                              40,520      53,046
    Net deferred acquisition costs                         96,803      87,821
    Goodwill                                              268,376     268,376
    Intangible assets                                      56,876      60,359
    Net balances receivable on purchases and sales of
     investments                                                -         184
    Net deferred tax assets                                19,740      21,895
    Other assets                                           75,184      67,566
                                         Total assets $10,239,223  $9,597,483
                                                      -----------  ----------

    LIABILITIES:
    Reserve for losses and loss expenses               $4,879,188  $4,761,772
    Unearned premiums                                     962,203     928,619
    Reinsurance balances payable                           99,732     102,837
    Net balances payable on purchases and sales of
     investments                                          318,570           -
    Senior notes                                          797,700     498,919
    Accounts payable and accrued liabilities              106,010      92,041
                                    Total liabilities  $7,163,403  $6,384,188
                                                       ----------  ----------

    SHAREHOLDERS' EQUITY:
    Common shares, 2010: CHF 15.00; 2009: par value
     $0.03 per share  (2010: 40,003,642; 2009:
     49,734,487 shares issued and 2010: 38,089,226;
     2009: 49,734,487 shares outstanding)                 600,055       1,492
    Additional paid-in capital                            170,239   1,359,934
    Treasury shares, at cost (2010: 1,914,416, 2009:
     nil)                                                (112,811)          -
    Retained earnings                                   2,361,202   1,702,020
    Accumulated other comprehensive income, net of
     tax                                                   57,135     149,849
                                                           ------     -------
                           Total shareholders' equity   3,075,820   3,213,295
                                                        ---------   ---------

           Total liabilities and shareholders' equity $10,239,223  $9,597,483
                                                      ===========  ==========
                  ALLIED WORLD ASSURANCE COMPANY HOLDINGS, AG
                      UNAUDITED CONSOLIDATED SEGMENT DATA
      (Expressed in thousands of United States dollars, except for ratio
                                 information)

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

    Gross premiums
     written              $196,287      $115,056      $70,599    $381,942
    Net premiums written   143,789        73,973       69,437     287,199
    Net premiums earned    133,930        81,764      127,110     342,804
    Other income                 -             -            -          -
    Net losses and loss
     expenses              (74,750)      (27,084)     (58,185)   (160,019)
    Acquisition costs      (16,902)          431      (22,377)    (38,848)
    General and
     administrative
     expenses              (38,978)      (26,905)     (19,251)    (85,134)
                           -------       -------      -------     -------
    Underwriting income      3,300        28,206       27,297      58,803
    Net investment
     income                                                        50,168
    Net realized
     investment losses                                             (3,738)
    Net impairment
     charges recognized
     in earnings                                                        -
    Amortization and
     impairment of
     intangible assets                                               (808)
    Interest expense                                              (11,650)
    Foreign exchange
     loss                                                            (196)
                                                                     ----
    Income before income
     taxes                                                        $92,579
                                                                  =======

    GAAP Ratios:
    Loss and loss
     expense ratio            55.8%         33.1%        45.8%       46.7%
    Acquisition cost
     ratio                    12.6%         (0.5%)       17.6%       11.3%
    General and
     administrative
     expense ratio            29.1%         32.9%        15.1%       24.8%
    Combined ratio            97.5%         65.5%        78.5%       82.8%
                              ====          ====         ====        ====

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

    Gross premiums
     written              $169,116       $130,272      $22,741    $322,129
    Net premiums written   123,155         87,827       22,712     233,694
    Net premiums earned    119,641         92,464      118,376     330,481
    Other income               373              -            -         373
    Net losses and loss
     expenses              (68,273)       (16,467)     (56,663)   (141,403)
    Acquisition costs      (15,806)           501      (22,821)    (38,126)
    General and
     administrative
     expenses              (32,474)       (25,791)     (13,947)    (72,212)
                           -------        -------      -------     -------
    Underwriting income      3,461         50,707       24,945      79,113
    Net investment
     income                                                         73,252
    Net realized
     investment gains                                               37,796
    Net impairment
     charges recognized
     in earnings                                                      (187)
    Amortization and
     impairment of
     intangible assets                                              (7,856)
    Interest expense                                                (9,527)
    Foreign exchange
     loss                                                           (1,408)
                                                                    ------
    Income before income
     taxes                                                        $171,183
                                                                  ========

    GAAP Ratios:
    Loss and loss
     expense ratio            57.1%          17.8%        47.9%      42.8%
    Acquisition cost
     ratio                    13.2%          (0.5%)       19.3%      11.5%
    General and
     administrative
     expense ratio            27.1%          27.9%        11.8%      21.9%
                              ----           ----         ----       ----
    Combined ratio            97.4%          45.2%        79.0%      76.2%
                              ====           ====         ====       ====
                     ALLIED WORLD ASSURANCE COMPANY HOLDINGS, AG
                         UNAUDITED CONSOLIDATED SEGMENT DATA
          (Expressed in thousands of United States dollars, except for ratio
                                     information)

    Year Ended
     December 31,         U.S.      International
     2010              Insurance      Insurance    Reinsurance     Total
    -------------      ---------      ---------    -----------     -----

    Gross premiums
     written            $729,267       $504,937     $524,193    $1,758,397
    Net premiums
     written             551,063        319,083      522,309     1,392,455
    Net premiums
     earned              518,444        338,791      502,313     1,359,548
    Other income             913              -            -           913
    Net losses and
     loss expenses      (297,517)      (160,153)    (250,213)     (707,883)
    Acquisition costs    (67,797)           460      (92,152)     (159,489)
    General and
     administrative
     expenses           (128,556)       (94,226)     (63,775)     (286,557)
                        --------        -------      -------      --------
    Underwriting
     income               25,487         84,872       96,173       206,532
    Net investment
     income                                                        244,143
    Net realized
     investment gains                                              285,612
    Net impairment
     charges
     recognized in
     earnings                                                         (168)
    Amortization and
     impairment of
     intangible
     assets                                                         (3,483)
    Interest expense                                               (40,242)
    Foreign exchange
     loss                                                             (444)
                                                                      ----
    Income before
     income taxes                                                 $691,950
                                                                  ========

    GAAP Ratios:
    Loss and loss
     expense ratio          57.4%          47.3%        49.8%         52.1%
    Acquisition cost
     ratio                  13.1%          (0.1%)       18.3%         11.7%
    General and
     administrative
     expense ratio          24.8%          27.8%        12.7%         21.1%
    Combined ratio          95.3%          75.0%        80.8%         84.9%
                            ====           ====         ====          ====

    Year Ended
     December 31,        U.S.       International
     2009             Insurance       Insurance    Reinsurance     Total
    -------------     ---------       ---------    -----------     -----

    Gross premiums
     written            $674,826       $555,944     $465,575    $1,696,345
    Net premiums
     written             493,067        362,893      465,165     1,321,125
    Net premiums
     earned              447,491        413,170      456,231     1,316,892
    Other income           1,506              -            -         1,506
    Net losses and
     loss expenses      (211,363)      (158,062)    (234,635)     (604,060)
    Acquisition costs    (58,114)        (2,742)     (87,991)     (148,847)
    General and
     administrative
     expenses           (115,797)       (84,390)     (48,405)     (248,592)
                        --------        -------      -------      --------
    Underwriting
     income               63,723        167,976       85,200       316,899
    Net investment
     income                                                        300,675
    Net realized
     investment gains                                              126,352
    Net impairment
     charges
     recognized in
     earnings                                                      (49,577)
    Amortization and
     impairment of
     intangible
     assets                                                        (11,051)
    Interest expense                                               (39,019)
    Foreign exchange
     loss                                                             (748)
                                                                      ----
    Income before
     income taxes                                                 $643,531
                                                                  ========

    GAAP Ratios:
    Loss and loss
     expense ratio          47.2%          38.3%        51.4%         45.9%
    Acquisition cost
     ratio                  13.0%           0.7%        19.3%         11.3%
    General and
     administrative
     expense ratio          25.9%          20.4%        10.6%         18.9%
                            ----           ----         ----          ----
    Combined ratio          86.1%          59.4%        81.3%         76.1%
                            ====           ====         ====          ====
                    ALLIED WORLD ASSURANCE COMPANY HOLDINGS, AG
                     UNAUDITED OPERATING INCOME RECONCILIATION
         (Expressed in thousands of United States dollars, except share and
                                 per share amounts)

                                   Quarter Ended             Year Ended
                                    December 31,             December 31,
                                   2010       2009        2010        2009
                                   ----       ----        ----        ----

    Net income                  $92,786   $161,255    $665,005    $606,887
    Add after tax affect of:
      Net realized
       investment
       (losses) gains             4,306    (37,796)   (267,727)   (126,352)
      Net impairment
       charges
       recognized in
       earnings                       -        187         109      49,577
      Impairment of
       intangible
       assets                         -      6,866           -       6,866
      Foreign
       exchange loss                196      1,408         444         748
                                    ---      -----         ---         ---
    Operating
     income                     $97,288   $131,920    $397,831    $537,726
                                =======   ========    ========    ========

    Weighted average common
     shares outstanding:
    Basic                    40,291,620 49,662,575  46,491,279  49,503,438
    Diluted                  43,501,068 52,880,733  49,913,317  51,992,674

    Basic per share data:
    Net income                    $2.30      $3.25      $14.30      $12.26
    Add after tax affect of:
      Net realized
       investment
       (losses) gains              0.11      (0.76)      (5.75)      (2.55)
      Net impairment
       charges
       recognized in
       earnings                       -          -           -        1.00
      Impairment of
       intangible
       assets                         -       0.14           -        0.14
      Foreign
       exchange loss                  -       0.03        0.01        0.01
                                    ---       ----        ----        ----
    Operating
     income                       $2.41      $2.66       $8.56      $10.86
                                  =====      =====       =====      ======

    Diluted per share data
    Net income                    $2.13      $3.05      $13.32      $11.67
    Add after tax affect of:
      Net realized
       investment
       (losses) gains              0.10      (0.72)      (5.36)      (2.43)
      Net impairment
       charges
       recognized in
       earnings                       -          -           -        0.96
      Impairment of
       intangible
       assets                         -       0.13           -        0.13
      Foreign
       exchange loss               0.01       0.03        0.01        0.01
                                   ----       ----        ----        ----
    Operating
     income                       $2.24      $2.49       $7.97      $10.34
                                  =====      =====       =====      ======
                ALLIED WORLD ASSURANCE COMPANY HOLDINGS, AG
           UNAUDITED  DILUTED BOOK VALUE PER SHARE RECONCILIATION
    (Expressed in thousands of United States dollars, except share and
                             per share amounts)

                                                  As of            As of
                                               December 31,     December 31,
                                                   2010             2009
                                                   ----             ----
    Price per share at period end                $59.44           $46.07

    Total shareholders' equity                3,075,820        3,213,295

    Basic common shares outstanding          38,089,226       49,734,487

    Add: unvested restricted share units        571,178          915,432

    Add:  Performance based equity
     awards                                   1,440,017        1,583,237

    Add:  employee purchase plan                 10,576                -

    Add:  dilutive options/warrants
     outstanding                              3,272,739        6,805,157
      Weighted average exercise price per
       share                                     $35.98           $34.44
    Deduct: options bought back via
     treasury method                         (1,980,884)      (5,087,405)
                                             ----------       ----------

    Common shares and common share
    equivalents outstanding                  41,402,852       53,950,908

    Basic book value per common share            $80.75           $64.61
    Diluted book value per common share          $74.29           $59.56

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

                        Quarter Ended December 31,    Year Ended December 31,
                                2010        2009         2010         2009
                                ----        ----         ----         ----

    Opening shareholders'
     equity               $3,341,314  $3,078,894   $3,213,295   $2,416,862
    Deduct: accumulated
     other comprehensive
     income                 (111,760)   (185,043)    (149,849)    (105,632)
                            --------    --------     --------     --------
    Adjusted opening
     shareholders' equity  3,229,554   2,893,851    3,063,446    2,311,230
                                   -           -
    Closing shareholders'
     equity               $3,075,820  $3,213,295   $3,075,820   $3,213,295
    Deduct: accumulated
     other comprehensive
     income                  (57,135)   (149,849)     (57,135)    (149,849)
                             -------    --------      -------     --------
    Adjusted closing
     shareholders' equity  3,018,685   3,063,446    3,018,685    3,063,446

    Average shareholders'
     equity               $3,124,120  $2,978,649   $3,041,066   $2,687,338
                          ==========  ==========   ==========   ==========

    Net  income available
     to shareholders         $92,786    $161,255     $665,005     $606,887
    Annualized net income
     available to
     shareholders            371,144     645,020      665,005      606,887

    Annualized return on
     average
     shareholders' equity
     -net income
     available to
     shareholders               11.9%       21.7%        21.9%        22.6%
                                ====        ====         ====         ====

    Operating income
     available to
     shareholders            $97,288    $131,920     $397,831     $537,726
    Annualized operating
     income available to
     shareholders            389,152     527,680      397,831      537,726

    Annualized return on
     average
     shareholders' equity
     -operating income
     available to
     shareholders               12.5%       17.7%        13.1%        20.0%
                                ====        ====         ====         ====

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

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