THORATEC CORP

CUSIP: 885175307 Class: COM NEW

AMERICAN CENTURY COMPANIES INC's Holding History (CIK: 0000748054)

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

Q3 2014
Shares 59,168 Value ($000) $1,582 Avg Close — Range —
Q2 2014
Shares 68,941 Value ($000) $2,403 Avg Close — Range —
Q1 2014
Shares 66,315 Value ($000) $2,375 Avg Close — Range —
Q4 2013
Shares 99,535 Value ($000) $3,643 Avg Close — Range —
Q3 2013
Shares 63,684 Value ($000) $2,375 Avg Close — Range —
Q2 2013
Shares 61,879 Value ($000) $1,937 Avg Close — Range —