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Mast Therapeutics Inc (MSTX)Ownership Data

Short Interest History (%)

This is the historical short interest of Mast Therapeutics Inc, as measured by the Short Percentage Of Float.

Institutional Ownership History (%)

This the Institutional Ownership History of Mast Therapeutics IncPeter Lynch prefers to buy companies with low institutional ownership.

Insider ownership (%)

This is the historical insider ownership of Mast Therapeutics Inc. It is usually better to buy companies with large insider ownership. The company insiders' interest are more aligned with external shareholders in this case.

Top Direct Holders

HolderPositionShares% of Shares
Report Date
Evan M. LevineN/A4,395,0003.42%2008-02-08
Dr. M. Ross Johnson,PhDN/A1,621,7791.26%2006-12-21
R. Martin Emanuele,PhDN/A294,5980.23%2013-05-30
David A. RamsayN/A100,000less than 0.1%2012-05-14
Dr. James A. Merritt,M.D.N/A35,000less than 0.1%2007-12-14
Brian M. Culley,M.S.N/A34,500less than 0.1%2012-03-14
Dr. Michael M. Goldberg,M.D.N/A26,000less than 0.1%2006-10-15
Ms. Carrie E. McQueenN/A25,000less than 0.1%2005-06-15
Dr. Joan M. Robbins,PhDN/A10,000less than 0.1%2008-05-13
Dr. Mark J. Pykett,PhD,V.M.D.N/A8,000less than 0.1%2004-05-24

Top Fund Holders

HolderSharesReport Date% of Shares
% of Total
Assets Managed
Market Value
Franklin Advisers, Inc.11,946,1002014-09-309.370.016,654,000
Sabby Management LLC8,854,2002014-11-066.890.004,505,902
Franklin Biotechnology Discovery6,592,6002014-10-315.130.133,354,974
Franklin Biotechnology Discovery Fund5,353,5002014-12-314.170.172,997,960
Baker Bros Advisors LLC3,000,0002014-09-302.350.021,671,000
Vanguard Group, Inc.2,810,7912014-09-302.200.001,566,000
Mpm Asset Management, LLC2,551,8512014-09-302.010.471,429,000
Vanguard Total Stock Mkt Idx2,262,2982014-12-311.760.001,266,887
Deerfield Management Co1,466,2492013-12-311.430.00677,994
Vanguard Extended Market Index Fund907,9002014-12-310.710.00508,424

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