CBOT Holdings, Inc. President and CEO to Present at William Blair &Company Annual Growth Stock Conference on June 20, 2007

CHICAGO, June 15, 2007 - CBOT Holdings, Inc., holding company for the Chicago Board of Trade (CBOT^®) (NYSE: BOT), one of the world’s leading derivatives exchanges, today announced that Bernard Dan, President and Chief  Executive Officer, will present at the following investor conference:

William Blair & Company 27^th Annual Growth Stock Conference

Date:               Wednesday, June 20, 2007

Time:                3:40 pm (Central Time)

Duration:         30 minutes

Location:          Four Seasons Hotel, Chicago, Illinois

The presentation will be broadcast by live audio over the Internet and can be accessed via the investor relations events and presentations section of the CBOT Holdings web site at http://www.cbot.com.  Please allow extra time prior to the presentation to visit the site to download the software required to listen to the broadcast.  The audio web cast will be available for replay at the same address approximately two hours following its conclusion for 30 days.

About the CBOT

As one of the leading global derivative exchanges, the Chicago Board of Trade provides a diverse mix of financial, equity, and commodity futures and options-on-futures products. Building on its 159-year history, the CBOT continues to advance into the future using the strength of deep liquidity, market integrity and member-trader expertise. Using superior trading technology in both electronic and open-auction trading platforms, the CBOT provides premier customer service to risk managers and investors worldwide. For more information visit our web site at www.cbot.com

Investor Contacts:

Deborah Koopman
312.789.8532
dkoopman1@cbot.com

Pam Washington
312.341.3439
pwashingt1@cbot.com

Media Contact:
Craig Grabiner
(312) 341-5758
cgrabiner1@cbot.com