Framingham, Mass. — July 19, 2007 — Netezza Corporation (NYSE Arca: NZ) today announced an initial public offering of 9,000,000 shares of its common stock at a price of $12 per share. Netezza has granted the underwriters a 30-day option to purchase up to 1,350,000 additional shares to cover over-allotments. Netezza's common stock will be listed on NYSE Arca under the symbol "NZ" and will begin trading Thursday, July 19, 2007.

Credit Suisse Securities (USA) LLC and Morgan Stanley & Co. Incorporated acted as joint book-running managers for the offering with Needham & Company, LLC and Thomas Weisel Partners, LLC serving as co-managers. A copy of the final prospectus relating to the offering may be obtained by contacting either the Credit Suisse Prospectus Department, One Madison Avenue, New York, NY 10010, telephone 1-800-221-1037, or Morgan Stanley & Co. Incorporated, 180 Varick Street, New York, NY 10014, Attention: Prospectus Department, by telephone at 212-761-6775 or by e-mail at prospectus@morganstanley.com.

This press 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 state or jurisdiction in which such offer, solicitation or sale would be unlawful prior to registration or qualification under the securities laws of any such state or jurisdiction.

About Netezza
Netezza is a leading provider of data warehouse appliances. The Netezza Performance Server® system, or NPS®, integrates database, server and storage platforms in a purpose-built unit to enable detailed queries and analyses on large volumes of stored data. The results of these queries and analyses, often referred to as business intelligence, provide organizations with actionable information to improve their business operations.

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