X0306 4 2015-02-02 0 0000913077 AFFYMETRIX INC AFFX 0001455312 Witney Frank C/O AFFYMETRIX, INC. 3420 CENTRAL EXPRESSWAY SANTA CLARA CA 95051 1 1 0 0 President and CEO Common Stock 2015-02-02 4 A 0 65000 0 A 433501 D On February 5, 2015, this number of perfomance-based restricted stock units was 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. Siang H. Chin, Attorney-in-Fact for Frank Witney 2015-02-04