THORATEC CORP

CUSIP: 885175307 Class: COM NEW

Invesco Ltd.'s Holding History (CIK: 0000914208)

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

Q3 2015
Shares 57,097 Value ($000) $3,612 Avg Close — Range —
Q2 2015
Shares 1,212,201 Value ($000) $54,028 Avg Close — Range —
Q1 2015
Shares 1,228,308 Value ($000) $51,453 Avg Close — Range —
Q4 2014
Shares 1,251,831 Value ($000) $40,635 Avg Close — Range —
Q3 2014
Shares 1,247,676 Value ($000) $33,350 Avg Close — Range —
Q2 2014
Shares 1,131,183 Value ($000) $39,433 Avg Close — Range —
Q1 2014
Shares 1,178,218 Value ($000) $42,192 Avg Close — Range —
Q4 2013
Shares 1,582,347 Value ($000) $57,915 Avg Close — Range —
Q3 2013
Shares 1,264,163 Value ($000) $47,141 Avg Close — Range —
Q2 2013
Shares 1,266,504 Value ($000) $39,654 Avg Close — Range —