Summary of ARCH CAPITAL GROUP LTD.

ITEM 7.01 Regulation FD Disclosure.

On November 6, 2009, Arch Capital Group Ltd. ("ACGL") issued a press release announcing that its Board of Directors (the "Board") approved an additional share repurchase authorization (the "Additional Repurchase Authorization"). A copy of this press release is attached to this Current Report on Form 8-K as Exhibit 99.1 and is incorporated herein by reference.

The information in this Current Report on Form 8-K, including the information set forth in Exhibit 99.1, shall not be deemed "filed" for purposes of
Section 18 of the Securities Exchange Act of 1934, as amended (the "Exchange Act"), or incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act, except as shall be expressly set forth by specific reference in such a filing.

ITEM 8.01 Other Events.

Preferred Share Dividends. On November 5, 2009, the Board declared dividends with respect to the outstanding (1) 8,000,000 shares of its 8.00% Non-Cumulative Preferred Shares, Series A, $0.01 per share (the "Series A Shares"), with a liquidation preference of $25.00 per share, and (2) 5,000,000 shares of its 7.875% Non-Cumulative Preferred Shares, Series B, $0.01 per share (the "Series B Shares"), with a liquidation preference of $25.00 per share, as outlined below. All such dividends will be payable out of lawfully available funds for the payment of dividends under Bermuda law on February 15, 2010 to holders of record of the Series A Shares and the Series B Shares, as applicable, as of February 1, 2010, unless determined otherwise by the Board or the Executive Committee of the Board on or prior to the applicable effective date.

           Effective Date
Series     for Declaration    Dividend Period     Dividend Amount    Rate Per Share
Series A          12/31/09   11/15/09-12/31/09   $       2,044,444   $        0.2556
                   2/14/10      1/1/10-2/14/10           1,955,556            0.2444
                                                 $       4,000,000   $          0.50
Series B          12/31/09   11/15/09-12/31/09   $       1,257,813   $        0.2516
                   2/14/10      1/1/10-2/14/10           1,203,125            0.2406
                                                 $       2,460,938   $        0.4922

ITEM 9.01 Financial Statements and Exhibits.

EXHIBIT NO.                                DESCRIPTION
99.1          Press Release dated November 6, 2009 announcing Arch Capital Group
              Ltd.'s Additional Repurchase Authorization.