THORATEC CORP

CUSIP: 885175307 Class: COM NEW

Yorktown Management & Research Co Inc's Holding History (CIK: 0001313559)

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

Q3 2015
Shares 6,300 Value ($000) $399 Avg Close — Range —
Q2 2015
Shares 6,300 Value ($000) $281 Avg Close — Range —
Q1 2015
Shares 6,300 Value ($000) $264 Avg Close — Range —
Q4 2014
Shares 9,500 Value ($000) $308 Avg Close — Range —
Q3 2014
Shares 9,500 Value ($000) $254 Avg Close — Range —