Marlborough, Mass. — May 13, 2009 — Netezza Corporation (NYSE: NZ), the global leader in data warehouse and analytic appliances, today announced that it will issue its financial results for the first fiscal quarter ended April 30, 2009 after market close on Wednesday, May 27, 2009. Netezza will host a conference call and webcast at 4:30 p.m. Eastern Time (1:30 p.m. Pacific Time) that day to discuss its first quarter fiscal 2010 results.

The conference call can be accessed by dialing +1-800-295-4740 for participants in the United States and by dialing +1-617-614-3925 for participants outside the United States. The passcode for the conference call is 62670273. A telephonic replay of the conference call will also be available two hours after the call and will run for two weeks. The replay can be accessed by dialing +1-888-286-8010 for participants in the United States and by dialing +1-617-801-6888 for participants outside the United States. The passcode for the replay is 52011552.

The webcast will be accessible from the "Investor Relations" section of Netezza's Web site (www.netezza.com). The webcast will be archived on Netezza's Web site for a period of one year

About Netezza Corporation (NYSE: NZ)

Netezza Corporation is the global leader in data warehouse and analytic appliances that dramatically simplify high-performance analytics for business users across the extended enterprise, delivering significant competitive and operational advantage in today's information-intensive marketplaces. The Netezza family of appliances brings appliance simplicity to a broad range of complex data warehouse and analytic challenges. Customers who have realized the benefits of Netezza appliances include Ahold, Amazon.com, Debenhams, Department of Veterans Affairs, Epsilon, iBasis, eHarmony, Nationwide, Neiman Marcus, Orange UK, Premier, Inc., Ross Stores, Ryder System, Inc., The Carphone Warehouse and Virgin Media. Based in Marlborough, Mass., Netezza has offices in Washington, DC, the United Kingdom and the Asia Pacific region. For more information about Netezza, please visit www.netezza.com.

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Netezza, Netezza Performance Server and NPS are trademarks of Netezza Corporation. Other names may be trademarks of their respective owners.