News Release

Chicago Mercantile Exchange Holdings Inc. Shareholders Elect Ten Individuals to Board of Directors; Board Re-Elects Executive Chairman Terrence A. Duffy

Wed Apr 25 2007

CHICAGO, April 25 /PRNewswire-FirstCall/ -- Chicago Mercantile Exchange Holdings Inc. (NYSE: CME)(NASDAQ: CME) today announced the election results from its annual meeting. Shareholders elected ten directors to two-year terms expiring in 2009.

The following individuals were elected as equity directors by Class A and Class B shareholders voting together as a single class:

   -- Terrence A. Duffy, 48, Executive Chairman, CME
   -- Craig S. Donohue, 45, Chief Executive Officer, CME
   -- Daniel R. Glickman, 62, Chairman and Chief Executive Officer, Motion
      Picture Association of America, Inc.
   -- William P. Miller II, 51, Senior Investment Officer, Fund Management
      for the Ohio Public Employees Retirement System.
   -- James E. Oliff, 58, President, FILO Corp.; Vice Chairman, CME
   -- John F. Sandner, 65, Chairman, E*Trade Futures, LLC; Retired Chairman
      of the Board, CME
   -- Terry L. Savage, 62, Financial Journalist and Author; President, Terry
      Savage Productions, Ltd.

  The following individual was elected by holders of Class B-1 shares:

   -- William G. Salatich, Jr., 55, Independent Floor Broker and Trader

  The following individual was elected by holders of Class B-2 shares:

   -- David J. Wescott, 49, President, The Wescott Group Ltd.

  The following individual was elected by holders of Class B-3 shares:

   -- Gary M. Katler, 60, Vice President, Fortis Clearing Americas

  In other actions, CME shareholders:

   -- Elected five members of the Class B-1 and Class B-2 nominating
      committees, which will select board candidates for election by their
      respective class of shareholders at next year's annual meeting;
   -- Approved an amendment to the Chicago Mercantile Exchange Holdings Inc.
      Omnibus Stock Plan;
   -- Approved an amendment to the Chicago Mercantile Exchange Holdings Inc.
      Annual Incentive Plan; and
   -- Ratified the Audit Committee's appointment of Ernst & Young LLP as our
      independent registered public accounting firm for the 2007 year.

The board of directors re-elected the company's current executive chairman Terrence A. Duffy to serve another two-year term. Duffy has been chairman of CME since April 2002 and executive chairman since October 2006. The board also re-elected the following officers, who will hold their positions on the boards of Chicago Mercantile Exchange Holdings Inc. and Chicago Mercantile Exchange Inc. for a one-year term (through the April 2008 election):

   Vice Chairman:  James E. Oliff
   Second Vice Chairman:  William R. Shepard
   Secretary:  Martin J. Gepsman
   Treasurer:  Patrick B. Lynch

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. ( 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.

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. Further information about CME and its products is available on the CME Web site at http://www.cme.com/ .

CME-G

SOURCE: Chicago Mercantile Exchange Holdings Inc.

CONTACT: Media Contacts, Anita Liskey, +1-312-466-4613, or William
Parke, +1-312-930-3467, news@cme.com , or Investor Contact, John Peschier,
+1-312-930-8491, all of Chicago Mercantile Exchange Holdings Inc.

Web site: http://www.cme.com/

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