ZOLTEK COS INC

CUSIP: 98975W104 Class: CMN

DIMENSIONAL FUND ADVISORS LP's Holding History (CIK: 0000354204)

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

Q4 2013
Shares 2,595,308 Value ($000) $43,471 Avg Close — Range —
Q3 2013
Shares 2,597,308 Value ($000) $43,349 Avg Close — Range —
Q2 2013
Shares 2,611,562 Value ($000) $33,716 Avg Close — Range —