On July 24, 2008, Arch Capital Group Ltd. issued a press release reporting its earnings for the six month period ended June 30, 2008. 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 9.01       Exhibits.



EXHIBIT NO.                                 DESCRIPTION

99.1            Press Release dated July 24, 2008 announcing the earnings of Arch
                Capital Group Ltd. for the six month period ended June 30, 2008