X0306 4 2015-02-02 0 0000913077 AFFYMETRIX INC AFFX 0001577539 Wood Gavin C/O AFFYMETRIX, INC. 3420 CENTRAL EXPRESSWAY SANTA CLARA CA 95051 0 1 0 0 EVP, Chief Financial Officer Comon Stock 2015-02-02 4 A 0 40000 0 A 94362 D On February 2, 2015, this number of performance-based restricted stock units were determined to be earned with respect to the performance period ending December 31, 2014. These earned restricted stock units will vest over two years starting February 13, 2015. /s/ Siang H. Chin, Attorney-in-Fact for Gavin Wood 2015-02-04