EXHIBIT 21
AFFYMETRIX, INC.
LIST OF SUBSIDIARIES
Affymetrix, UK Ltd, wholly-owned subsidiary incorporated in the United Kingdom and doing business under such name.
Affymetrix France S.A.S., wholly-owned subsidiary incorporated in France and doing business under such name.
Affymetrix GmbH, wholly-owned subsidiary incorporated in Germany and doing business under such name.
Affymetrix Japan K.K., a wholly-owned subsidiary incorporated in Japan and doing business under such name.
Affymetrix Pte Ltd, wholly-owned subsidiary incorporated in Singapore and doing business under such name.
Affymetrix Technology, Ltd, wholly-owned subsidiary incorporated in Bermuda and doing business under such name.
Genetic MicroSystems, Inc., wholly-owned subsidiary incorporated in Massachusetts and doing business under such name.
Neomorphic, Inc., wholly-owned subsidiary incorporated in California and doing business under such name.
ParAllele BioScience, Inc., wholly-owned subsidiary incorporated in California and doing business under such name.