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aTyr Pharma Inc (LIFE) Ownership Data

Short Interest History (%)

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

Date Short Interest
January 29, 20164.56
January 15, 20165.82
December 31, 20155.6
December 15, 20154.64
November 30, 20154.91
November 13, 20155.23
October 30, 20156.92
October 15, 20157.76
September 30, 20157.21
September 15, 20156.9
August 31, 20156.24
August 14, 20155.97
July 31, 20155.48
July 15, 20154.94
June 30, 20152.7
June 15, 20151.48
May 29, 20150.78
May 15, 20150.54

Institutional Ownership History (%)

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

Date Institutional Ownership
December 31, 201570.64
September 30, 201562.83
June 30, 201559.89

Insider ownership (%)

This is the historical insider ownership of aTyr Pharma 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.

Date Insider Ownership
January 31, 20162.03
November 30, 20152.03
October 31, 20152.03
September 30, 20152.03
August 31, 20152.03
July 31, 20152.03
June 30, 20152.03
May 31, 20152.03
April 30, 20151.59

Top Direct Holders

HolderPositionShares% of Shares
Report Date
Dr. John D. MendleinN/A245,9711.04%2015-05-12
John K. ClarkeN/A104,8780.44%2015-05-12
Ms. Melissa A. AshlockN/A68,1640.29%2015-05-06
Mr. Frederic ChereauN/A12,867less than 0.1%2015-05-06
Kathryn E. FalbergN/A12,572less than 0.1%2015-05-06
Amir NashatN/A12,572less than 0.1%2015-05-12
Dr. Paul R. Schimmel,PhDN/A12,572less than 0.1%2015-05-12
Dr. David M. Weiner, M.D.N/A5,028less than 0.1%2015-05-06
Mr. Stan BlackburnN/A2,149less than 0.1%2015-05-06
Mr. Holly D. ChrzanowskiN/A1,885less than 0.1%2015-05-06

Top Fund Holders

HolderSharesReport Date% of Shares
% of Total
Assets Managed
Market Value($1000)
Fidelity Management and Research Company   Premium Plus3,545,8922015-09-3015.000.0136,381
Baker Bros Advisors LP   Premium Plus2,335,1252015-09-309.880.2123,958
Sofinnova Venture Partners IX LP1,866,1262015-05-060.00N/A0
Polaris Venture Management Co. V,LLC   Premium Plus1,827,9922015-09-307.7310.5218,755
One Palmer Square Associates V, L.L.C.1,827,5202015-12-317.73N/A17,965
T. Rowe Price Associates, Inc.   Premium Plus1,184,1072015-09-304.85N/A11,770
RS Investment Management Co. LLC Premium1,082,2492015-09-304.580.1011,104
EcoR1 Capital, LLC   Premium Plus840,4622015-09-303.563.288,623
RS Small Cap Growth Fund720,3632015-09-303.050.337,391
Fidelity® Growth Company Fund599,5912015-12-312.540.015,894

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