X0306 4 2016-02-13 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 Common Stock 2016-02-13 4 F 0 7476 14.09 D 117734 D Common Stock 2016-02-13 4 F 0 2102 14.09 D 115632 D Represents the number of shares withheld by Affymetrix, Inc. to cover the tax liability resulting from the scheduled vesting of performance restricted stock units granted on February 13, 2014 and determined to be earned on February 8, 2016 with respect to Mr. Wood's 2015 performance. Represents the number of shares withheld by Affymetrix, Inc. to cover the tax liability resulting from the scheduled vesting of restricted stock units previoulsy granted. /s/ Siang H.Chin, Attorney-in-Fact for Gavin Wood 2016-02-17