THORATEC CORP

CUSIP: 885175307 Class: COM NEW

Advisors Asset Management, Inc.'s Holding History (CIK: 0001297376)

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

Q3 2015
Shares 1,500 Value ($000) $95 Avg Close — Range —
Q2 2015
Shares 1,600 Value ($000) $71 Avg Close — Range —
Q1 2015
Shares 1,600 Value ($000) $67 Avg Close — Range —
Q4 2014
Shares 1,600 Value ($000) $52 Avg Close — Range —
Q3 2014
Shares 1,700 Value ($000) $45 Avg Close — Range —
Q2 2014
Shares 1,700 Value ($000) $59 Avg Close — Range —
Q1 2014
Shares 1,800 Value ($000) $64 Avg Close — Range —
Q4 2013
Shares 1,800 Value ($000) $66 Avg Close — Range —
Q3 2013
Shares 1,800 Value ($000) $67 Avg Close — Range —
Q2 2013
Shares 1,800 Value ($000) $56 Avg Close — Range —