News Release

CME Selected for CMP MEDIA InformationWeek 500 Based on Innovation and Technology Leadership

Wed Sep 21 2005

CHICAGO, Sept. 21, 2005 - CME, the world's largest and most diversified financial exchange, today announced it has been named to CMP Media LLC's InformationWeek 500, a prestigious listing of the most innovative users of information technology in the United States. CME, ranked 93rd, is the only financial exchange to be recognized in this year's listing among the top 500 companies recognized for IT innovation. For 17 years, the InformationWeek 500 has tracked organizations' IT agendas, providing a unique opportunity to understand and examine their business practices across core areas of technology operations. Companies named to this list demonstrate a pattern of technologicaland organizational innovation. Capital One, which is ranked No.1, followed by SC Johnson & Sons Inc., Eastman Kodak Co. and BellSouth Corp, are some of the household names being honored for their innovative IT practices. “Our ongoing spirit of innovation and leadership is reflected in this industry recognition and we are especially proud of our technology achievements,��? said CME Chairman Terry Duffy. “We are committed to exceeding the expectations of our customers, and our successful implementation and management of technology has allowed us to transform and grow our business to meet their needs.��? “This award is a true reflection on the employees at CME and their dedication to continuous innovation and understanding the needs of our customers,��? said CME Chief Executive Officer Craig Donohue. “Our commitment to maintain CME Globex, the industry leading electronic trading platform, allows us to continue our global leadership position in financial technology.��? "The InformationWeek 500 will invest in aggregate 3% of their annual revenue on IT this year - an average cash outlay of $293 million. Collectively, the nation's most innovative users of technology will spend a total of $147 billion on information technology this year," say Stephanie Stahl, editor-in-chief of InformationWeek . "Content filtering and content management software are among the most widely deployed products, while improved spam filtering, increased desktop security, and desktop operating system upgrades are some of the widespread IT initiatives aimed at improving company productivity. And to improve the efficiency of business operations, this year's IT innovators have devoted time to increase the use of automated processes, improve data integration between systems or departments, and established business-process frameworks to improve the running of business tasks." The InformationWeek 500 is the most detailed source of industry-specific IT budget data. The research project gathered in-depth information directly from companies about how they approach and prioritize their IT investments. The research identified and ranked the companies following an extensive online and phone study. Chicago Mercantile Exchange Inc. (www.cme.com) is the world’s largest and most diverse financial exchange. As an international marketplace, CME brings together buyers and sellers on CME Globex electronic trading platform and on its trading floors. CME offers futures and options on futures primarily in four product areas: interest rates, stock indexes, foreign exchange and commodities. The exchange moved about $1.6 billion per day in settlement payments in the first half of 2005 and managed $43.7 billion in collateral deposits at June 30, 2005, including $4.0 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® Index. About InformationWeek InformationWeek is the largest, most influential community of IT buyers and sellers focusing on, driving and setting the agenda for business innovation powered by technology. Every week, InformationWeek touches more than 1 million business technology executives worldwide through its magazine editions, online sites, research platforms, and peer-to-peer events. The InformationWeek Media Network consists of Optimize, Bank Systems & Technology, Insurance & Technology and Wall Street & Technology — all leading publications in their respective markets — as well as Government Enterprise. InformationWeek is consistently recognized for its commitment to excellence and innovation, and has received several of the industry’s top media accolades, including top spots in BtoB Magazine’s Media Power 50, Circulation Excellence Awards from Circulation Management Magazine and several awards from the American Society of Business Publication Editors (ASBPE). About CMP Media LLC CMP Media (www.cmp.com) is the leading integrated media solutions company providing “broad and deep��? access to the entire technology spectrum — the builders, sellers and buyers of technology worldwide. The company’s comprehensive database of technology decision makers enables marketers to reach targeted audiences throughout the purchase process with publications, web offerings, face-to-face events, consulting and other marketing services that deliver actionable results. Statements in this news release that are not historical facts are forward-looking statements. These statements are not guarantees of future performance and involve risks, uncertainties and assumptions that are difficult to predict. Therefore, actual outcomes and results may differ materially from what is expressed or implied in any forward-looking statements. More detailed information about factors that may affect our performance may be found in our filings with the Securities and Exchange Commission, including our most recent Quarterly Report on Form 10-Q, which can be obtained at its Web site at www.sec.gov. We undertake no obligation to publicly update any forward-looking statements, whether as a result of new information, future events or otherwise. Chicago Mercantile Exchange, CME, the globe logo and CME Globex are registered trademarks of Chicago Mercantile Exchange Inc. 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. e-mail Corporate Communications (312) 930-3434 fax: (312) 930-3439 Anita Liskey (312) 466-4613 David Prosperi (312) 634-8770 John Peschier (312) 930-8491 Global Offices 1-800-331-3332 Contact CME Customer Feedback

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