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CME Enters Into New Employment Agreement With CEO Craig S. Donohue

Date 03/04/2006

Chicago Mercantile Exchange Holdings Inc. (NYSE, Nasdaq: CME) today announced that its wholly owned subsidiary, Chicago Mercantile Exchange Inc. (CME), has entered into a new employment agreement that provides for the continuation of CEO Craig S. Donohue's employment for three additional years.

Under the terms of the agreement, Donohue's contract will extend until Dec. 31, 2009.

Donohue, 44, has served as CEO since January 2004. He previously served as Executive Vice President and Chief Administrative Officer and, since joining CME as staff attorney in 1989, has held key leadership roles in the company's corporate administration, legal and business development areas. In addition, Donohue serves as Vice Chairman and Chairman-Elect of the National Council on Economic Education, as a Director of the Chicagoland Chamber of Commerce and the Executives' Club of Chicago, and as a member of the Commodity Futures Trading Commission's Global Markets Advisory Committee. He holds an MBA degree from Northwestern University's Kellogg School of Management, a JD degree from John Marshall Law School, a master of laws degree from IIT Chicago-Kent College of Law and a bachelor's degree from Drake University.

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(R) Index on July 1, 2003. It is the parent company of Chicago Mercantile Exchange Inc. ( http://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 $1.4 billion per day in settlement payments in 2005 and managed $45.8 billion in collateral deposits at December 30, 2005, including $3.2 billion in deposits for non-CME products. CME is a wholly owned subsidiary of Chicago Mercantile Exchange Holdings Inc. (NYSE, Nasdaq: CME), which is part of the Russell 1000(R) Index.

Chicago Mercantile Exchange, CME, the globe logo and CME Globex are registered trademarks of Chicago Mercantile Exchange Inc. E-mini is a trademark of CME. CLEARING 21 is a registered trademark of CME and New York Mercantile Exchange, Inc. S&P, S&P 500, NASDAQ-100, Nikkei 225, Russell 1000, Russell 2000, 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.