ARROWHEAD RESH CORP

CUSIP: 042797209 Class: COM

ORBIMED ADVISORS LLC's Holding History (CIK: 0001055951)

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

Q3 2014
Shares 5,178,200 Value ($000) $76,482 Avg Close — Range —
Q2 2014
Shares 4,957,800 Value ($000) $70,946 Avg Close — Range —
Q1 2014
Shares 3,910,000 Value ($000) $64,202 Avg Close — Range —
Q4 2013
Shares 2,128,900 Value ($000) $23,099 Avg Close — Range —