THORATEC CORP

CUSIP: 885175307 Class: COM NEW

WELLINGTON MANAGEMENT GROUP LLP's Holding History (CIK: 0000902219)

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

Q3 2015
Shares 179,589 Value ($000) $11,360 Avg Close — Range —
Q2 2015
Shares 242,665 Value ($000) $10,816 Avg Close — Range —
Q1 2015
Shares 231,335 Value ($000) $9,690 Avg Close — Range —
Q4 2014
Shares 210,495 Value ($000) $6,833 Avg Close — Range —
Q3 2014
Shares 217,290 Value ($000) $5,808 Avg Close — Range —
Q2 2014
Shares 214,165 Value ($000) $7,466 Avg Close — Range —
Q1 2014
Shares 202,035 Value ($000) $7,235 Avg Close — Range —
Q4 2013
Shares 77,903 Value ($000) $2,851 Avg Close — Range —
Q2 2013
Shares 23,825 Value ($000) $746 Avg Close — Range —