SIMPLEX TRADING, LLC - MAST THERAPEUTICS INC ownership

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MAST THERAPEUTICS INC's ticker is and the CUSIP is 576314908. A total of 2 filers reported holding MAST THERAPEUTICS INC in Q4 2016. The put-call ratio across all filers is - and the average weighting 0.0%.

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Quarter-by-quarter ownership
SIMPLEX TRADING, LLC ownership history of MAST THERAPEUTICS INC
ValueSharesWeighting
Q4 2016$0–104
-16.8%
0.00%–
Q3 2016$0–125
+150.0%
0.00%–
Q2 2016$0–50–0.00%–
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Other shareholders
MAST THERAPEUTICS INC shareholders Q4 2016
NameSharesValueWeighting ↓
GROUP ONE TRADING, L.P. 165,300$76,0000.00%
View complete list of MAST THERAPEUTICS INC shareholders