Presentation to be Webcast Live on May 20, 2009

Marlborough, Mass. — May 13, 2009 — Netezza Corporation (NYSE: NZ), the global leader in data warehouse and analytic appliances, today announced that Patrick J. Scannell, Jr., senior vice president and chief financial officer, will be presenting at the Eighth Annual JMP Securities Research Conference to be held at The Ritz-Carlton, San Francisco from May 18th-20th, 2009. Mr. Scannell will be presenting on Wednesday, May 20, 2009 at 10:00 a.m. Pacific Time and will discuss Netezza's business strategy and financial performance.

An audio webcast of the presentation will be available live at the "Investor Relations" section of Netezza's Web site at www.netezza.com. For those unable to listen to the live webcast, an archive of the presentation will be available on Netezza's Web site.

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.