THORATEC CORP

CUSIP: 885175307 Class: COM NEW

HBK INVESTMENTS L P's Holding History (CIK: 0001011443)

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

Q2 2015
Shares 57,700 Value ($000) $2,572 Avg Close — Range —
Q2 2014
Shares 24,400 Value ($000) $851 Avg Close — Range —
Q1 2014
Shares 12,800 Value ($000) $458 Avg Close — Range —
Q4 2013
Shares 15,345 Value ($000) $562 Avg Close — Range —
Q2 2013
Shares 11,552 Value ($000) $362 Avg Close — Range —