THORATEC CORP

CUSIP: 88517530 Class: COM NEW

ARROWSTREET CAPITAL, LIMITED PARTNERSHIP's Holding History (CIK: 0001164508)

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

Q3 2015
Shares 225,706 Value ($000) $10,060 Avg Close — Range —
Q2 2015
Shares 225,706 Value ($000) $10,060 Avg Close — Range —
Q1 2015
Shares 13,906 Value ($000) $583 Avg Close — Range —
Q1 2014
Shares 224,851 Value ($000) $8,052 Avg Close — Range —
Q4 2013
Shares 362,163 Value ($000) $13,255 Avg Close — Range —
Q3 2013
Shares 301,579 Value ($000) $11,246 Avg Close — Range —
Q2 2013
Shares 209,757 Value ($000) $6,567 Avg Close — Range —