ARROWHEAD RESH CORP

CUSIP: 042797209 Class: COM

BAKER BROS. ADVISORS LP's Holding History (CIK: 0001263508)

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

Q4 2015
Shares 1,009,509 Value ($000) $6,208 Avg Close — Range —
Q3 2015
Shares 1,009,509 Value ($000) $5,815 Avg Close — Range —
Q2 2015
Shares 1,009,509 Value ($000) $7,218 Avg Close — Range —
Q1 2015
Shares 1,290,187 Value ($000) $8,728 Avg Close — Range —
Q4 2014
Shares 1,230,802 Value ($000) $9,083 Avg Close — Range —
Q3 2014
Shares 1,230,802 Value ($000) $18,179 Avg Close — Range —
Q2 2014
Shares 1,430,802 Value ($000) $20,475 Avg Close — Range —
Q1 2014
Shares 732,062 Value ($000) $12,020 Avg Close — Range —
Q4 2013
Shares 3,090,000 Value ($000) $33,527 Avg Close — Range —
Q3 2013
Shares 3,140,000 Value ($000) $17,867 Avg Close — Range —