AFFYMETRIX INC

CUSIP: 00826T108 Class: COM

PRIMECAP MANAGEMENT CO/CA/'s Holding History (CIK: 0000763212)

Note: Option positions (PUT/CALL) are excluded.

Q1 2016
Shares 10,544,194 Value ($000) $147,724 Avg Close — Range —
Q4 2015
Shares 10,897,740 Value ($000) $109,958 Avg Close — Range —
Q3 2015
Shares 10,856,540 Value ($000) $92,715 Avg Close — Range —
Q2 2015
Shares 11,014,740 Value ($000) $120,281 Avg Close — Range —
Q1 2015
Shares 11,037,040 Value ($000) $138,625 Avg Close — Range —
Q4 2014
Shares 10,940,040 Value ($000) $107,978 Avg Close — Range —
Q3 2014
Shares 10,559,240 Value ($000) $84,263 Avg Close — Range —
Q2 2014
Shares 10,559,240 Value ($000) $94,083 Avg Close — Range —
Q1 2014
Shares 10,690,540 Value ($000) $76,224 Avg Close — Range —
Q4 2013
Shares 10,666,640 Value ($000) $91,413 Avg Close — Range —
Q3 2013
Shares 8,134,440 Value ($000) $50,434 Avg Close — Range —
Q2 2013
Shares 6,616,740 Value ($000) $29,378 Avg Close — Range —