Chicago Mercantile Exchange Holdings Announces Date Of 2Q05 Earnings Release, Conference Call

Chicago Mercantile Exchange Holdings Inc. (NYSE, NASDAQ: CME) will announce earnings for second-quarter 2005 before the financial markets open on Tuesday, July 26. The company has scheduled an investor conference call that day at 8:30 a.m. Eastern time (7:30 a.m. Central time). A live audio Webcast of the conference call will be available on the Investor Relations section of the company’s Web site,www.cme.com. Following the conference call, an archived recording will be available at the same site. Those wishing to listen to the live conference via telephone should dial (800) 946-0705 if calling from within the United States or (719) 457-2637 if calling from outside the United States, at least 10 minutes before the call begins.