ARROWHEAD RESH CORP

CUSIP: 042797209 Class: COM

RTW INVESTMENTS, LP's Holding History (CIK: 0001493215)

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

Q2 2015
Shares 2,560,000 Value ($000) $18,304 Avg Close — Range —
Q1 2015
Shares 2,410,000 Value ($000) $16,304 Avg Close — Range —
Q4 2014
Shares 2,610,000 Value ($000) $19,262 Avg Close — Range —