Please direct your media and public relations inquiries to: mediarelations@cdw.com 800-800-4CDW CDW Computer Centers, Inc. Files for Public Offering on Behalf of Three Shareholders VERNON HILLS, Ill. June 26, 2001 - CDW Computer Centers Inc. (Nasdaq: CDWC), announced that it has filed a registration statement with the Securities and Exchange Commission for the proposed public offering by three of its shareholders of a total of 8,750,000 shares of the Company's common stock. The proposed offering consists of 6,314,000 shares to be sold by Michael P. Krasny, the Company's founder and former Chief Executive Officer and current Chairman Emeritus, 2,000,000 shares to be sold by Gregory C. Zeman, the Company's Vice Chairman, and 436,000 shares to be sold by Daniel B. Kass, the Company's Executive Vice President-Sales. Mr. Krasny, Mr. Zeman and Mr. Kass are all directors of CDW. Mr. Krasny and Mr. Zeman have also granted the underwriters an option to purchase from them an additional total of up to 1,312,500 shares of common stock to cover over-allotments. All shares in the offering will be sold by the selling shareholders and the total number of shares outstanding will not change as a result of the offering. Mr. Zeman and Mr. Kass will acquire the shares to be sold by them pursuant to the exercise of stock options granted to them under the MPK Stock Option Plan. The MPK Stock Option Plan was established by Mr. Krasny in 1992, pursuant to which he granted Mr. Zeman and Mr. Kass nonforfeitable options to purchase shares of CDW common stock owned by him. CDW will not sell any shares and will not receive any of the proceeds from the sales by the selling shareholders. After the offering, assuming the over-allotment option is not exercised, the selling shareholders will beneficially own a total of approximately 30.5 million shares of the Company's common stock, or 35.6% of the total current outstanding common shares. The offering is being lead-managed by Morgan Stanley & Co. Incorporated. Co-managers of the offering include William Blair & Company, L.L.C., Goldman, Sachs & Co. and Robert W. Baird & Co. Incorporated. Copies of the prospectus may be obtained from Morgan Stanley & Co. Incorporated, 1585 Broadway, New York, NY 10036. A registration statement relating to the securities intended to be sold has been filed with the Securities and Exchange Commission but has not become effective. These securities may not be sold nor may offers to buy be accepted prior to the time such registration statement becomes effective. This press release shall not constitute an offer to sell or the solicitation of an offer to buy, nor will there be any sale of these securities in any state in which such offer, solicitation or sale would be unlawful prior to registration or qualification under the securities laws of any such state. About CDW Computer Centers, Inc. CDW® (Nasdaq: CDWC - news), ranked No. 435 on the FORTUNE 500, offers complete, customized technology solutions for businesses, government agencies and educational institutions nationwide. CDW is a leading source of technology products and services from companies such as Cisco, Compaq, Hewlett-Packard, IBM, Intel, Microsoft, Sony, Toshiba and other top name brands. CDW was founded in 1984 as a home-based business and today employs more than 2,700 coworkers whose efforts generated net sales of $3.8 billion in 2000. CDW's direct model offers one-on-one relationships with highly trained account managers; purchasing via telephone, the award-winning www.cdw.com Web site, and customized CDW@work(TM) extranets; custom configured solutions and same day shipping; flexible financing solutions; and, telephone and online technical support with its factory-trained and A+ certified technicians. Additional information can be found by visiting http://www.cdw.com. For more information About CDW: Visit CDW on the Internet at http://www.cdw.com Contact CDW Investor Relations via the Internet at investorrelations@cdw.com Or by telephone at 847.419.8234