QUESTCOR PHARMACEUTICALS INC

CUSIP: 74835Y10 Class: COM

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

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

Q1 2014
Shares 435,827 Value ($000) $28,298 Avg Close — Range —
Q4 2013
Shares 120,397 Value ($000) $6,556 Avg Close — Range —
Q3 2013
Shares 319,466 Value ($000) $18,529 Avg Close — Range —
Q2 2013
Shares 175,123 Value ($000) $7,959 Avg Close — Range —