Affymetrix, Inc. (NASDAQ: AFFX) today announced that it will release operating results for the first quarter after close of the stock market on Wednesday, April 21, 2010.

The Affymetrix management team will host a conference call on April 21, 2010 at 2:00 PM PT to review its operating results for the first quarter. A live webcast can be accessed by visiting the investor relations section of the company’s website at www.affymetrix.com. In addition, investors and other interested parties can listen by dialing 866-500-AFFX (domestic) or 706-643-2771 (international).

A replay of this call will be available from 5:00 PM PT on April 21, 2010 until 8:00 PM PT on April 28, 2010 at the following numbers: 800-642-1687 (domestic), 706-645-9291 (international). The conference identification number for the replays is 69103813. An archived webcast of the conference call will be available under the investor relations section of the company's website at www.affymetrix.com.

About Affymetrix

Affymetrix technology is used by the world’s top pharmaceutical, diagnostic and biotechnology companies, as well as leading academic, government and not-for-profit research institutes. More than 1,900 systems have been shipped around the world and more than 20,000 peer-reviewed papers have been published using the technology.

Affymetrix is headquartered in Santa Clara, Calif., and has manufacturing facilities in Cleveland, Ohio, and Singapore. The company has about 1,100 employees worldwide and maintains sales and distribution operations across Europe and Asia. For more information about Affymetrix, please visit the company’s website at www.affymetrix.com.

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