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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
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
September 30, 201563
June 30, 201563

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
September 30, 20152
August 31, 20152
July 31, 20152
June 30, 20152
May 31, 20152
April 30, 20152

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
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 Fund596,1222015-09-302.520.026,116
TIVERTON ASSET MANAGEMENT LLC   Premium Plus472,2362015-09-302.000.114,845

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