Mast Therapeutics Inc (NYSE MKT LLC:MSTX)

Data as of Jan 23
 -0.0051 / -1.07%
Today’s Change
Today|||52-Week Range
There is significant interest inMSTX by institutional investors. The 18.78% of outstanding shares they control represents a greater percentage of ownership than at any other company in the Biotechnology industry.
Other institutional8.58%
Mutual fund holders10.20%
Individual stakeholders0.27%

Largest Quarterly Institutional

Latest Institutional Activity

12/31/2014FIRST MANHATTAN CO.  Sold 300.00 shares of Mast Therapeutics Inc
12/31/2014SABBY CAPITAL LLC  Sold 897.2 Thousand shares of Mast Therapeutics Inc

Top 10 Owners of Mast Therapeutics Inc

Total value ($)Shares
bought / sold
Franklin Advisers, Inc.7.49%11,946,1006,689,81600.00%
Sabby Capital LLC4.99%7,956,9734,455,905-897,227-10.13%
Baker Bros. Advisors LP1.88%3,000,0001,680,00000.00%
The Vanguard Group, Inc.1.76%2,810,7911,574,043+191,654+7.32%
Pine River Capital Management LP0.43%687,500385,000+625,000+1,000.00%
Deutsche Bank Securities, Inc.0.39%625,600350,33600.00%
GRT Capital Partners LLC0.37%581,886325,856+69,410+13.54%
Geode Capital Management LLC0.35%560,868314,08600.00%
KCG Americas LLC0.20%314,505176,123+211,500+205.33%
Dimensional Fund Advisors LP0.15%233,685130,864-31,471-11.87%

Top 10 Mutual Funds Holding Mast Therapeutics Inc

Mutual fundStakeShares
Total value ($)Shares
bought / sold
FTIF SICAV - Franklin Biotechnolo...4.13%6,592,6003,691,85600.00%
Franklin Biotechnology Discovery ...3.36%5,353,5002,997,96000.00%
Vanguard Total Stock Market Index...1.42%2,262,2981,266,88700.00%
Vanguard Extended Market Index Fu...0.57%907,900508,424+31,900+3.64%
Fidelity Spartan Extended Market ...0.33%531,478297,62800.00%
OCP International0.09%150,00084,000+150,000--
Vanguard Balanced Index Fund0.08%125,55270,30900.00%
Vanguard Institutional Total Stoc...0.05%81,95345,89400.00%
DFA US Small Cap Portfolio0.05%76,90043,06400.00%
DFA US Micro Cap Portfolio0.05%72,43840,56500.00%

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