THORATEC CORP

CUSIP: 885175307 Class: COM NEW

MASON STREET ADVISORS, LLC's Holding History (CIK: 0001167711)

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

Q3 2015
Shares 22,534 Value ($000) $1,426 Avg Close — Range —
Q2 2015
Shares 21,968 Value ($000) $979 Avg Close — Range —
Q1 2015
Shares 21,793 Value ($000) $913 Avg Close — Range —
Q4 2014
Shares 21,509 Value ($000) $698 Avg Close — Range —
Q3 2014
Shares 22,095 Value ($000) $591 Avg Close — Range —
Q2 2014
Shares 22,093 Value ($000) $770 Avg Close — Range —
Q1 2014
Shares 22,606 Value ($000) $810 Avg Close — Range —
Q4 2013
Shares 22,564 Value ($000) $826 Avg Close — Range —
Q3 2013
Shares 22,870 Value ($000) $853 Avg Close — Range —
Q2 2013
Shares 34,000 Value ($000) $1,065 Avg Close — Range —