THORATEC CORP

CUSIP: 885175307 Class: COM NEW

NEW YORK STATE TEACHERS RETIREMENT SYSTEM's Holding History (CIK: 0000314969)

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

Q3 2015
Shares 98,000 Value ($000) $6,199 Avg Close — Range —
Q2 2015
Shares 98,000 Value ($000) $4,368 Avg Close — Range —
Q1 2015
Shares 98,000 Value ($000) $4,105 Avg Close — Range —
Q4 2014
Shares 98,000 Value ($000) $3,181 Avg Close — Range —
Q3 2014
Shares 98,000 Value ($000) $2,620 Avg Close — Range —
Q2 2014
Shares 98,000 Value ($000) $3,416 Avg Close — Range —
Q1 2014
Shares 98,000 Value ($000) $3,509 Avg Close — Range —
Q4 2013
Shares 98,100 Value ($000) $3,590 Avg Close — Range —
Q3 2013
Shares 98,200 Value ($000) $3,662 Avg Close — Range —
Q2 2013
Shares 98,200 Value ($000) $3,075 Avg Close — Range —