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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 (%)Short Interest (Shares in Mil)
September 29, 20172.380.32
September 15, 20173.010.40
August 31, 20172.980.39
August 15, 20173.490.46
July 31, 20173.310.44
July 14, 20173.510.46
June 30, 20173.690.49
June 15, 20173.980.53
May 31, 20174.20.56
May 15, 20173.860.51
April 28, 20174.190.55
April 13, 20174.120.55
March 31, 20174.370.58
March 15, 20174.470.59
February 28, 20174.70.65
February 15, 20175.140.71
January 31, 20175.360.74
January 13, 20174.260.59
December 30, 201650.69
December 15, 20165.710.79
November 30, 20165.080.71
November 15, 20166.040.84
October 31, 20165.920.82
October 14, 20165.660.78
September 30, 20165.640.78
September 15, 20165.80.80
August 31, 20165.620.78
August 15, 20165.180.72
July 29, 20164.490.62
July 15, 20164.290.60
June 30, 20163.610.50
June 15, 20166.160.85
May 31, 20166.580.91
May 13, 20166.090.85
April 29, 20165.680.79
April 15, 20166.410.89
March 31, 20166.570.91
March 15, 20165.480.83
February 29, 20166.050.92
February 12, 20164.960.75
January 29, 20164.560.69
January 15, 20165.820.89
December 31, 20155.60.85
December 15, 20154.640.71
November 30, 20154.910.75
November 13, 20155.230.80
October 30, 20156.921.05
October 15, 20157.761.18
September 30, 20157.211.10
September 15, 20156.91.05
August 31, 20156.240.95
August 14, 20155.970.91
July 31, 20155.480.83
July 15, 20154.940.75
June 30, 20152.70.41
June 15, 20151.480.22
May 29, 20150.780.12
May 15, 20150.540.08

Institutional Ownership History (%)

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

Date Institutional Ownership (%)Institutional Ownership (Shares in Mil)
September 30, 201748.9914.48
June 30, 201743.5510.31
March 31, 201743.2610.29
December 31, 201642.4410.08
September 30, 201642.9110.18
June 30, 201642.8810.17
March 31, 201660.9714.44
December 31, 201573.7917.47
September 30, 201562.8314.89
June 30, 201559.9316.08

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 (%)Insider Ownership (Shares in Mil)
June 30, 20172.590.62
May 31, 20172.590.62
April 30, 20172.580.61
March 31, 20172.580.61
February 28, 20172.580.61
January 31, 20172.580.61
December 31, 20162.280.54
November 30, 20162.280.54
October 31, 20162.280.54
September 30, 20162.280.54
August 31, 20162.280.54
July 31, 20162.280.54
June 30, 20162.280.54
May 31, 20162.230.53
April 30, 20162.420.57
March 31, 20162.020.48
February 29, 20162.030.48
January 31, 20162.030.48
December 31, 20152.030.48
November 30, 20152.030.48
October 31, 20152.030.48
September 30, 20152.030.48
August 31, 20152.030.48
July 31, 20152.030.48
June 30, 20152.030.48
May 31, 20152.030.48
April 30, 20151.590.36

Top Direct Holders

HolderPositionShares% of Shares
Outstanding
Report Date
Dr. John D. Mendlein, PhDCEO and Director324,9711.09%2016-12-19
John K. ClarkeN/A104,8780.35%2015-05-12
Dr. Melissa A. Ashlock, M.D.N/A68,1640.23%2015-05-06
Dr. Paul R. Schimmel,PhDDirector40,4400.14%2016-12-20
Mr. Frederic ChereauN/A12,867less than 0.1%2015-05-06
Kathryn E. FalbergN/A12,572less than 0.1%2015-05-06
Mr. Amir H. NashatN/A12,572less than 0.1%2015-05-12
Mr. Grove MatsuokaN/A12,412less than 0.1%2016-05-09
Mr. Amanullah AshrafVice President, Manufacturing11,000less than 0.1%2016-12-20
Dr. David M. Weiner, M.D.N/A5,028less than 0.1%2015-05-06

Top Fund Holders

HolderSharesReport Date% of Shares
Outstanding
% of Total
Assets Managed
Market Value($1000)
EcoR1 Capital, LLC   Premium Plus2,292,6592017-06-301.800.107,795
Polaris Venture Management Co. V, L.L.C.   Premium Plus1,827,9922017-06-307.570.086,215
BlackRock Inc.   Premium Plus542,1982017-06-300.000.021,844
Rock Springs Capital Management LP   Premium Plus475,0002017-06-300.080.021,615
VANGUARD GROUP INC   Premium Plus435,5242017-06-300.000.021,502
Glen Harbor Capital Management LLC   Premium Plus153,2382017-06-300.010.01529
Meadow Creek Investment Management LLC   Premium Plus126,1962017-06-300.010.01435
GEODE CAPITAL MANAGEMENT, LLC   Premium Plus108,9082017-06-300.000.00375
BRIDGEWAY CAPITAL MANAGEMENT INC   Premium Plus102,6972017-06-300.000.00354
Elkfork Partners LLC   Premium Plus99,1542017-06-300.010.00342
RIVERHEAD CAPITAL MANAGEMENT LLC   Premium Plus79,6772017-06-300.010.00275
Tyers Asset Management LLC   Premium Plus72,1122017-06-300.010.00249
Jim Simons Premium60,3002017-06-300.000.00205
DIMENSIONAL FUND ADVISORS LP   Premium Plus58,1722017-06-300.000.00201
BANK OF AMERICA CORP /DE/   Premium Plus47,1322017-06-300.000.00160
Connor, Clark & Lunn Investment Management Ltd.   Premium Plus44,1002017-06-300.000.00152
NORTHERN TRUST CORP   Premium Plus35,2202017-06-300.000.00119
MORGAN STANLEY   Premium Plus29,7972017-06-300.000.00102
Bank of New York Mellon Corp   Premium Plus27,2112017-06-300.000.0093
Quotient Investors, LLC   Premium Plus22,2002017-09-300.08N/A112

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