THORATEC CORP

CUSIP: 885175307 Class: COM NEW

SECTOR GAMMA AS's Holding History (CIK: 0001475373)

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

Q2 2015
Shares 229,300 Value ($000) $10,220 Avg Close — Range —
Q1 2015
Shares 249,500 Value ($000) $10,452 Avg Close — Range —
Q4 2014
Shares 392,500 Value ($000) $12,741 Avg Close — Range —
Q3 2014
Shares 628,300 Value ($000) $16,794 Avg Close — Range —
Q2 2014
Shares 558,300 Value ($000) $19,462 Avg Close — Range —
Q1 2014
Shares 387,300 Value ($000) $13,869 Avg Close — Range —
Q4 2013
Shares 270,100 Value ($000) $9,886 Avg Close — Range —
Q3 2013
Shares 230,000 Value ($000) $8,577 Avg Close — Range —
Q2 2013
Shares 200,000 Value ($000) $6,262 Avg Close — Range —