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

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SOURCEFIRE INC's ticker is and the CUSIP is 83616T958. A total of 2 filers reported holding SOURCEFIRE INC in Q3 2013. The put-call ratio across all filers is - and the average weighting 0.0%.

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Quarter-by-quarter ownership
GROUP ONE TRADING, L.P. ownership history of SOURCEFIRE INC
ValueSharesWeighting
Q3 2013$2,467,000
+484.6%
32,500
+327.6%
0.05%
+370.0%
Q2 2013$422,000–7,600–0.01%–
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Other shareholders
SOURCEFIRE INC shareholders Q3 2013
NameSharesValueWeighting ↓
GROUP ONE TRADING, L.P. 32,500$2,467,0000.05%
Citadel Advisors 10,600$805,0000.00%
View complete list of SOURCEFIRE INC shareholders