THORATEC CORP

CUSIP: 885175307 Class: COM NEW

STATE OF MICHIGAN RETIREMENT SYSTEM's Holding History (CIK: 0000762152)

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

Q3 2015
Shares 24,900 Value ($000) $1,575 Avg Close — Range —
Q2 2015
Shares 24,700 Value ($000) $1,101 Avg Close — Range —
Q1 2015
Shares 24,500 Value ($000) $1,026 Avg Close — Range —
Q4 2014
Shares 26,200 Value ($000) $850 Avg Close — Range —
Q3 2014
Shares 26,700 Value ($000) $714 Avg Close — Range —
Q2 2014
Shares 26,800 Value ($000) $934 Avg Close — Range —
Q1 2014
Shares 26,700 Value ($000) $956 Avg Close — Range —
Q4 2013
Shares 26,700 Value ($000) $977 Avg Close — Range —
Q3 2013
Shares 26,800 Value ($000) $999 Avg Close — Range —
Q2 2013
Shares 26,400 Value ($000) $827 Avg Close — Range —