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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
May 13, 20166.44
April 29, 20166
April 15, 20166.78
March 31, 20166.95
March 15, 20165.48
February 29, 20166.05
February 12, 20164.96
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
March 31, 201685.68
December 31, 201573.75
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
April 30, 20162.42
March 31, 20162.02
February 29, 20162.03
January 31, 20162.03
December 31, 20152.03
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
Outstanding
Report Date
Dr. John D. Mendlein, PhDCEO and Director250,9711.06%2016-04-05
John K. ClarkeN/A104,8780.44%2015-05-12
Ms. Melissa A. AshlockN/A68,1640.29%2015-05-06
Dr. Paul R. Schimmel,PhDDirector53,0120.22%2016-04-14
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
Mr. Grove MatsuokaSee Remarks12,412less than 0.1%2016-05-09
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

Top Fund Holders

HolderSharesReport Date% of Shares
Outstanding
% of Total
Assets Managed
Market Value($1000)
Fidelity Management and Research Company   Premium Plus3,545,8922015-08-3115.00N/A51,345
Baker Bros Advisors LP   Premium Plus2,137,6062016-03-319.030.098,422
Sofinnova Venture Partners IX LP1,866,1262015-05-060.00N/A0
Polaris Venture Management Co. V,LLC   Premium Plus1,827,9922015-12-317.7214.1217,969
One Palmer Square Associates V, L.L.C.1,827,5202015-12-317.72N/A17,965
Alta Partners Management VIII, LLC1,778,0642015-12-317.51N/A17,478
CHP II Management LLC1,758,1582015-12-317.43N/A17,283
RS Investment Management Co. LLC Premium1,206,2492015-12-315.100.1111,857
RS Small Cap Growth Fund1,030,4742016-03-314.350.204,060
EcoR1 Capital, LLC   Premium Plus790,4622015-12-313.342.447,770

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