GROUP ONE TRADING, L.P. - STEC INC ownership

STEC INC's ticker is and the CUSIP is 784774901. A total of 3 filers reported holding STEC INC in Q2 2013. The put-call ratio across all filers is - and the average weighting 0.0%.

Quarter-by-quarter ownership
GROUP ONE TRADING, L.P. ownership history of STEC INC
ValueSharesWeighting
Q2 2013$5,0007000.00%
Other shareholders
STEC INC shareholders Q2 2013
NameSharesValueWeighting ↓
Citadel Advisors 73,000$491,0000.00%
GROUP ONE TRADING, L.P. 700$5,0000.00%
Timber Hill LLC 14,700$99,0000.00%
View complete list of STEC INC shareholders