THORATEC CORP

CUSIP: 885175307 Class: COM NEW

Walleye Trading LLC's Holding History (CIK: 0001388391)

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

Q3 2015
Shares 45,430 Value ($000) $2,874 Avg Close — Range —
Q2 2015
Shares 5,353 Value ($000) $239 Avg Close — Range —
Q1 2015
Shares 512 Value ($000) $21 Avg Close — Range —
Q4 2014
Shares 1,786 Value ($000) $58 Avg Close — Range —
Q3 2014
Shares 15,481 Value ($000) $414 Avg Close — Range —
Q4 2013
Shares 1,587 Value ($000) $58 Avg Close — Range —