ZOLTEK COS INC

CUSIP: 98975W104 Class: CMN

COMMONWEALTH OF PENNSYLVANIA PUBLIC SCHOOL EMPLS RETRMT SYS's Holding History (CIK: 0001083190)

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

Q4 2013
Shares 399,016 Value ($000) $6,684 Avg Close — Range —
Q3 2013
Shares 305,282 Value ($000) $5,095 Avg Close — Range —