HORSEHEAD HLDG CORP

CUSIP: 440694305 Class: COM

Portolan Capital Management, LLC's Holding History (CIK: 0001350290)

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

Q4 2013
Shares 10,360 Value ($000) $168 Avg Close — Range —
Q3 2013
Shares 10,360 Value ($000) $129 Avg Close — Range —
Q2 2013
Shares 181,736 Value ($000) $2,328 Avg Close — Range —