THORATEC CORP

CUSIP: 885175307 Class: COM NEW

Alyeska Investment Group, L.P.'s Holding History (CIK: 0001453072)

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

Q3 2015
Shares 326,541 Value ($000) $20,657 Avg Close — Range —
Q2 2015
Shares 582,891 Value ($000) $25,979 Avg Close — Range —
Q1 2015
Shares 659,461 Value ($000) $27,625 Avg Close — Range —
Q4 2014
Shares 524,014 Value ($000) $17,009 Avg Close — Range —
Q1 2014
Shares 505,905 Value ($000) $18,116 Avg Close — Range —
Q4 2013
Shares 300,000 Value ($000) $10,980 Avg Close — Range —
Q3 2013
Shares 200,000 Value ($000) $7,458 Avg Close — Range —