To: Bill Harmond who wrote (21637 ) 8/4/2004 1:38:16 PM From: Gerald R. Lampton Respond to of 57684 8/4/04 PR Newswire 16:30:00 PR Newswire (U.S.) Copyright © 2004 PR Newswire Association LLC. All Rights Reserved. Wednesday, August 4, 2004 Nanosys, Inc. Withdraws Initial Public Offering PALO ALTO, Calif., Aug. 4 /PRNewswire/ -- Nanosys, Inc. announced today that it has decided to withdraw its initial public offering of common stock. Based on adverse market conditions, Nanosys has determined that it is not advisable at this time to proceed with the proposed offering. This news release shall not constitute an offer to sell or the solicitation of an offer to buy, nor shall there be any sale of these securities in any jurisdiction, if such offer, solicitation or sale would be unlawful prior to registration of qualification under the securities laws of any such jurisdiction. Safe Harbor Statement This news release contains forward-looking statements relating to the timing of the proposed initial public offering of Nanosys' common stock. Actual events could differ materially as a result of many factors including market conditions, investor demand for initial public offerings, Nanosys' business and financial performance, and general economic, business competitive or regulatory conditions. About Nanosys Based in Palo Alto, Calif., Nanosys is a nanotechnology company developing nano-enabled systems based on a platform technology incorporating patent- protected, high performance, and highly integrated inorganic semiconductor nanostructures. Nanosys has strategic collaborators such as Intel, DuPont, Matsushita Electric Works and SAIC to develop nanotechnology-enabled components for products in information technology, communications, renewable energy, defense and the life and physical sciences. CONTACT: Calvin Chow CEO, Nanosys, Inc. (650) 331-2102 cchow@nanosysinc.com Larry Bock Executive Chairman, Nanosys, Inc. (650) 331-2105 lbock@nanosysinc.com Web site: nanosysinc.com CONTACT: Calvin Chow, CEO, +1-650-331-2102, cchow@nanosysinc.com, orLarry Bock, Executive Chairman, +1-650-331-2105, lbock@nanosysinc.com both ofNanosys, Inc.