GROUP ONE TRADING, L.P. - ZOLTEK COS INC ownership

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ZOLTEK COS INC's ticker is and the CUSIP is 98975W904. A total of 3 filers reported holding ZOLTEK COS INC in Q3 2013. The put-call ratio across all filers is - and the average weighting 0.0%.

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Filings
Quarter-by-quarter ownership
GROUP ONE TRADING, L.P. ownership history of ZOLTEK COS INC
ValueSharesWeighting
Q4 2013$1,002,000
-69.4%
59,800
-69.5%
0.02%
-76.2%
Q3 2013$3,276,000
+849.6%
196,300
+635.2%
0.06%
+600.0%
Q2 2013$345,000–26,700–0.01%–
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Other shareholders
ZOLTEK COS INC shareholders Q3 2013
NameSharesValueWeighting ↓
GROUP ONE TRADING, L.P. 196,300$3,276,0000.06%
Timber Hill LLC 65,600$1,095,0000.00%
Citadel Advisors 13,900$232,0000.00%
View complete list of ZOLTEK COS INC shareholders