HORSEHEAD HLDG CORP

CUSIP: 440694305 Class: COM

AZZAD ASSET MANAGEMENT INC /ADV's Holding History (CIK: 0001121914)

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

Q1 2012
Shares 19,317 Value ($000) $220 Avg Close — Range —
Q4 2011
Shares 20,082 Value ($000) $181 Avg Close — Range —
Q3 2011
Shares 19,536 Value ($000) $145 Avg Close — Range —
Q2 2011
Shares 18,413 Value ($000) $245 Avg Close — Range —
Q1 2011
Shares 24,922 Value ($000) $425 Avg Close — Range —
Q4 2010
Shares 15,570 Value ($000) $203 Avg Close — Range —