News Release

Chicago Mercantile Exchange Holdings Inc. Shareholders Elect Ten Individuals

Wed Apr 27 2005

CHICAGO, April 27, 2005 - Chicago Mercantile Exchange Holdings Inc. (NYSE: CME) today announced the election results from its annual meeting. Shareholders elected ten directors to two-year terms expiring in 2007. The following individuals were elected as equity directors by Class A and Class B shareholders voting together as a single class: Terrence A. Duffy, 46, Chairman of the Board of CME. Craig S. Donohue, 43, Chief Executive Officer of CME. Daniel R. Glickman, 60, President and Chief Executive Officer, Motion Picture Association of America, Inc. William P. Miller II, 49, Senior Risk Manager, Abu Dhabi Investment Authority. James E. Oliff, 56, Executive Director, International Futures and Options Associates; President, FILO Corp.; Vice Chairman of the Board of CME. John F. Sandner, 63, Chairman, E*Trade Futures, LLC; Special Policy Advisory to CME and former Chairman of the Board of CME. Terry L. Savage, 60, financial journalist, author and President of Terry Savage Productions, Ltd. The following individual was elected by holders of Class B-1 shares: William G. Salatich, Jr., 53, independent floor broker and trader. The following individual was elected by holders of Class B-2 shares: David J. Wescott, 48, President, The Wescott Group Ltd. The following individual was elected by holders of Class B-3 shares: Gary M. Katler, 58, Vice President, O’Connor & Co. L.L.C. In other actions, CME shareholders: Elected five members of the Class B-1, Class B-2 and Class B-3 nominating committees, which will select board candidates for election by their respective class of shareholders at next year’s annual meeting; Approved the 2005 Director Stock Plan; Approved the Employee Stock Purchase Plan; and Ratified the audit committee’s appointment of Ernst & Young LLP as the company’s independent registered public accounting firm for the 2005 fiscal year. Chicago Mercantile Exchange Holdings Inc. became the first publicly traded U.S. financial exchange on Dec. 6, 2002. The company was added to the Russell 1000® Index on July 1, 2003. It is the parent company of Chicago Mercantile Exchange Inc. (www.cme.com), the largest futures exchange in the United States. As an international marketplace, CME brings together buyers and sellers on its CME Globex electronic trading platform and on its trading floors. CME offers futures and options on futures primarily in four product lines: interest rates, stock indexes, foreign exchange and commodities. The exchange moved about $1.5 billion per day in settlement payments in first-quarter 2005 and managed $44.4 billion in collateral deposits as of March 31, 2005, including $4.3 billion in deposits for non-CME products. Chicago Mercantile Exchange, CME and Globex are registered trademarks of Chicago Mercantile Exchange Inc. E-mini is a trademark of CME. TRAKRS, Total Return Asset Contracts and other trade names, service marks, trademarks and registered trademarks that are not proprietary to Chicago Mercantile Exchange Inc. are the property of their respective owners, and are used herein under license.

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