ACGL Arch Capital Group Ltd

Arch Capital Group Ltd. [NASDAQ: ACGL] announced that it expects to release its 2007 second quarter results after the close of regular stock market hours on Wednesday, July 25, 2007. The Company will hold a conference call for investors and analysts at 11:00 a.m. Eastern Time on Thursday, July 26, 2007. A live webcast of this call will be available via the Media-Earnings Webcasts section of the Company�s website at http://www.archcapgroup.bm and will be archived on the website from 1:00 p.m. Eastern Time on July 26 through midnight Eastern Time on August 26, 2007. A telephone replay of the conference call also will be available beginning on July 26 at 1:00 p.m. Eastern Time until August 2, 2007 at midnight Eastern Time. To access the replay, domestic callers should dial 888-286-8010 (passcode 34806733), and international callers should dial 617-801-6888 (passcode 34806733). Arch Capital Group Ltd., a Bermuda-based company with over $4.0 billion in capital at March 31, 2007, provides insurance and reinsurance on a worldwide basis through its wholly owned subsidiaries.