ZOLTEK COS INC

CUSIP: 98975W104 Class: CMN

CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM's Holding History (CIK: 0001081019)

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

Q4 2013
Shares 49,714 Value ($000) $833 Avg Close — Range —
Q3 2013
Shares 49,514 Value ($000) $826 Avg Close — Range —
Q2 2013
Shares 47,935 Value ($000) $619 Avg Close — Range —
Q1 2013
Shares 47,734 Value ($000) $570 Avg Close — Range —