THORATEC CORP

CUSIP: 885175307 Class: COM NEW

PRINCIPAL FINANCIAL GROUP INC's Holding History (CIK: 0001126328)

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

Q3 2015
Shares 171,329 Value ($000) $10,839 Avg Close — Range —
Q2 2015
Shares 162,744 Value ($000) $7,254 Avg Close — Range —
Q1 2015
Shares 156,987 Value ($000) $6,576 Avg Close — Range —
Q4 2014
Shares 151,736 Value ($000) $4,925 Avg Close — Range —
Q3 2014
Shares 153,260 Value ($000) $4,097 Avg Close — Range —
Q2 2014
Shares 148,113 Value ($000) $5,163 Avg Close — Range —
Q1 2014
Shares 152,425 Value ($000) $5,458 Avg Close — Range —
Q4 2013
Shares 146,048 Value ($000) $5,345 Avg Close — Range —
Q3 2013
Shares 145,593 Value ($000) $5,430 Avg Close — Range —
Q2 2013
Shares 141,862 Value ($000) $4,441 Avg Close — Range —