AFFX Affymetrix, Inc.

Affymetrix, Inc. (Nasdaq:AFFX) today announced that company management will provide an overview of Affymetrix and outline future growth opportunities at two upcoming financial conferences. Greg Schiffman, Executive Vice President and CFO, will present at the Credit Suisse First Boston 2005 Health Care Conference in Phoenix, AZ. A live transmission of the presentation will take place at 8:30 a.m. PT (11:30 a.m. ET) on Friday, November 18, 2005. An archived webcast will be available for 30 days. Doug Farrell, VP Investor Relations, will present at the Lehman Brothers 2005 Small Cap Conference in Carlsbad, CA. A live transmission of the presentation will take place at 9:20 a.m. PT (12:20 p.m. ET) on Friday, November 18, 2005. An archived webcast will be available for 30 days. To access the live webcast or archived presentation, find the "Investors" link in the "Resources for" drop-down menu on www.affymetrix.com. About Affymetrix Affymetrix scientists invented the world's first microarray in 1989 and began selling the first commercial microarray in 1994. Since then, Affymetrix GeneChip(R) technology has become the industry standard in molecular biology research. 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 1,300 systems have been shipped around the world and more than 3,000 peer-reviewed papers have been published using the technology. Affymetrix's patented photolithographic manufacturing process provides the most information capacity available today on an array, enabling researchers to use a whole-genome approach to analyze the relationship between genetics and health. Headquartered in Santa Clara, Calif., Affymetrix has subsidiaries in Europe and Asia in addition to manufacturing facilities in Sacramento, Calif., and Bedford, Mass. The company has about 1000 employees worldwide. For more information about Affymetrix, please visit the company's website at www.Affymetrix.com. NOTE: Affymetrix, the Affymetrix logo, and GeneChip are registered trademarks owned or used by Affymetrix, Inc.