THORATEC CORP

CUSIP: 885175307 Class: COM NEW

Palo Alto Investors LP's Holding History (CIK: 0001306923)

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

Q3 2015
Shares 268,861 Value ($000) $17,008 Avg Close — Range —
Q2 2015
Shares 2,560,303 Value ($000) $114,113 Avg Close — Range —
Q1 2015
Shares 2,538,203 Value ($000) $106,325 Avg Close — Range —
Q4 2014
Shares 268,861 Value ($000) $8,727 Avg Close — Range —