Affymetrix to Host Conference Call on May 3, 2012 to Announce First Quarter 2012 Operating Results

Affymetrix, Inc. (NASDAQ: AFFX) today announced that its first quarter 2012 operating results will be reported after market close on Thursday May 3, 2012. The company will also hold a conference call on the same day at 5:00pm ET.

A live webcast can be accessed by visiting the investor relations section of the company’s website at www.affymetrix.com. Alternatively, investors and other interested parties may listen to the live conference call by dialing 877-407-8291 (domestic) or 201-689-8345 (international).

A replay of this call will be available from 5:00pm PT on May 3, 2012 until 8:00pm PT on May 10, 2012 at the following numbers: 877-660-6853 (domestic), 201-612-7415 (international). The conference identification number for the replay is 392482. 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 nonprofit research institutes. More than 2,000 systems have been shipped globally and approximately 25,000 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, Asia, and Latin America. For more information about Affymetrix, please visit www.affymetrix.com.