AMPHASTAR PHARMACEUTICALS IN

CUSIP: 03209R10 Class: COM

ARROWSTREET CAPITAL, LIMITED PARTNERSHIP's Holding History (CIK: 0001164508)

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

Q1 2016
Shares 48,212 Value ($000) $579 Avg Close — Range —
Q4 2015
Shares 235,122 Value ($000) $3,346 Avg Close — Range —
Q3 2015
Shares 158,550 Value ($000) $1,853 Avg Close — Range —