THORATEC CORP

CUSIP: 885175307 Class: COM NEW

VIRGINIA RETIREMENT SYSTEMS ET AL's Holding History (CIK: 0001005354)

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

Q2 2014
Shares 8,600 Value ($000) $300 Avg Close — Range —
Q1 2014
Shares 8,600 Value ($000) $308 Avg Close — Range —
Q4 2013
Shares 8,800 Value ($000) $322 Avg Close — Range —
Q3 2013
Shares 29,200 Value ($000) $1,089 Avg Close — Range —
Q2 2013
Shares 29,200 Value ($000) $914 Avg Close — Range —