ACGL Arch Capital Group Ltd

Arch Capital Group Ltd. (NASDAQ: ACGL) announced that it expects to release its 2006 first quarter results after the close of regular stock market hours on Thursday, April 27, 2006. The Company will hold a conference call for investors and analysts at 10:00 a.m. Eastern Time on Friday, April 28, 2006. 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 12:00 p.m. Eastern Time on April 28 through midnight Eastern Time on May 28, 2006. A telephone replay of the conference call also will be available beginning on April 28 at 12:00 p.m. Eastern Time until May 5 at midnight Eastern Time. To access the replay, domestic callers should dial 888-286-8010 (passcode 87029197), and international callers should dial 617-801-6888 (passcode 87029197). Arch Capital Group Ltd., a Bermuda-based company with approximately $2.8 billion in capital at December 31, 2005, provides insurance and reinsurance on a worldwide basis through its wholly owned subsidiaries.