THORATEC CORP

CUSIP: 885175307 Class: COM NEW

NORTHERN TRUST CORP's Holding History (CIK: 0000073124)

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

Q3 2015
Shares 807,043 Value ($000) $51,053 Avg Close — Range —
Q2 2015
Shares 802,693 Value ($000) $35,776 Avg Close — Range —
Q1 2015
Shares 839,738 Value ($000) $35,176 Avg Close — Range —
Q4 2014
Shares 872,451 Value ($000) $28,319 Avg Close — Range —
Q3 2014
Shares 907,753 Value ($000) $24,264 Avg Close — Range —
Q2 2014
Shares 899,183 Value ($000) $31,345 Avg Close — Range —
Q1 2014
Shares 996,986 Value ($000) $35,702 Avg Close — Range —
Q4 2013
Shares 1,029,397 Value ($000) $37,675 Avg Close — Range —
Q3 2013
Shares 1,015,784 Value ($000) $37,879 Avg Close — Range —
Q2 2013
Shares 666,639 Value ($000) $20,872 Avg Close — Range —