THORATEC CORP

CUSIP: 885175307 Class: COM NEW

PRICE T ROWE ASSOCIATES INC /MD/'s Holding History (CIK: 0000080255)

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

Q3 2015
Shares 5,104,659 Value ($000) $322,921 Avg Close — Range —
Q2 2015
Shares 5,136,729 Value ($000) $228,944 Avg Close — Range —
Q1 2015
Shares 5,363,179 Value ($000) $224,664 Avg Close — Range —
Q4 2014
Shares 6,183,367 Value ($000) $200,712 Avg Close — Range —
Q3 2014
Shares 5,538,703 Value ($000) $148,050 Avg Close — Range —
Q2 2014
Shares 1,732,673 Value ($000) $60,401 Avg Close — Range —
Q1 2014
Shares 1,925,814 Value ($000) $68,963 Avg Close — Range —
Q4 2013
Shares 1,954,872 Value ($000) $71,548 Avg Close — Range —
Q3 2013
Shares 253,952 Value ($000) $9,470 Avg Close — Range —
Q2 2013
Shares 257,552 Value ($000) $8,064 Avg Close — Range —