THORATEC CORP

CUSIP: 885175307 Class: COM NEW

DEERFIELD MANAGEMENT COMPANY, L.P.'s Holding History (CIK: 0001009258)

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

Q4 2014
Shares 102,919 Value ($000) $3,341 Avg Close — Range —
Q3 2014
Shares 323,136 Value ($000) $8,637 Avg Close — Range —
Q3 2013
Shares 891,000 Value ($000) $33,225 Avg Close — Range —