Affymetrix to Webcast Presentations from May Financial Conferences

Affymetrix, Inc. (Nasdaq:AFFX) today announced that company management will provide a corporate overview at the following financial conferences in May.

• Deutsche Bank 2011 Healthcare Conference, Boston, MA on Tue. May 3rd at 2:10pm ET
• Bank of America/Merrill Lynch Healthcare Conference, Las Vegas, NV on Wed. May 11th at 1:00pm PT

Live webcasts of all presentations will be available at http://www.affymetrix.com under the "Investors" link. Archived webcasts will be available for 30 days.

About Affymetrix

Affymetrix technology is used by the world's top pharmaceutical, diagnostic, and biotechnology companies, as well as leading academic, government, and nonprofit research institutes. More than 2,000 systems have been shipped around the world and more than 23,000 peer-reviewed papers have been published using the technology.

Affymetrix is headquartered in Santa Clara, Calif., and has manufacturing facilities in Santa Clara, Cleveland, Ohio, and Singapore. The company has about 900 employees worldwide and maintains sales and distribution operations across Europe and Asia. For more information about Affymetrix, please visit http://www.affymetrix.com.

Disclaimer

The information stated above was prepared by Affymetrix, Inc. and reflects solely the opinion of Affymetrix, Inc. Nothing in this statement shall be construed to imply any support or endorsement of Affymetrix, Inc., or any of its products, by any other institution mentioned, including Virginia Commonwealth University, their officers, agents and employees.

Forward-looking statements

All statements in this press release that are not historical are “forward-looking statements” within the meaning of Section 21E of the Securities Exchange Act as amended, including statements regarding Affymetrix’ “expectations,” “beliefs,” “hopes,” “intentions,” “strategies” or the like. Such statements are subject to risks and uncertainties that could cause actual results to differ materially for Affymetrix from those projected. These and other risk factors are discussed in Affymetrix’ Form 10-K for the year ended December 31, 2009, and other SEC reports for subsequent quarterly periods.

NOTE: Affymetrix, the Affymetrix logo, QuantiGene, and GeneChip are trademarks or registered trademarks of Affymetrix Inc.