Switch to:

ARCA biopharma Inc (ABIO) Ownership Data

Short Interest History (%)

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

Date Short Interest (%)Short Interest (Shares in Mil)
August 31, 20172.970.14
August 15, 20172.670.13
July 31, 20173.070.15
July 14, 20171.620.08
June 30, 20171.840.09
June 15, 20171.910.09
May 31, 20171.870.09
May 15, 20172.020.10
April 28, 20172.060.10
April 13, 20172.010.10
March 31, 20171.860.09
March 15, 20172.670.09
February 28, 20172.70.09
February 15, 20172.430.08
January 31, 20172.330.08
January 13, 20172.840.10
December 30, 20162.70.09
December 15, 20162.060.07
November 30, 20162.510.09
November 15, 20162.460.08
October 31, 20162.370.08
October 14, 20162.190.08
September 30, 20162.280.08
September 15, 20162.290.08
August 31, 20162.710.09
August 15, 20162.950.10
July 29, 20163.330.11
July 15, 20163.460.12
June 30, 20163.950.14
June 15, 20163.730.13
May 31, 20163.70.13
May 13, 20163.830.13
April 29, 20164.660.16
April 15, 20165.060.17
March 31, 20165.90.20
March 15, 20167.910.23
February 29, 20167.470.21
February 12, 20167.460.21
January 29, 20166.650.19
January 15, 20165.980.17
December 31, 20156.570.19
December 15, 20157.610.22
November 30, 20157.750.22
November 13, 20156.560.19
October 30, 20156.750.19
October 15, 20157.290.21
September 30, 20157.510.22
September 15, 20154.770.14
August 31, 20154.470.13
August 14, 20155.190.15
July 31, 20156.160.18
July 15, 20155.510.16
June 30, 20155.090.15
June 15, 20154.930.14
May 29, 20155.230.15
May 15, 20155.840.17
April 30, 20156.730.19
April 15, 20155.280.15
March 31, 20154.770.14
March 13, 20156.880.15
February 27, 20156.510.14
February 13, 20156.620.14
January 30, 20157.030.15
January 15, 20157.140.15
December 31, 20148.440.18
December 15, 20149.10.19
November 28, 20148.850.19
November 14, 201411.290.24
October 31, 201412.190.26
October 15, 201414.980.32
September 30, 201415.570.33
September 15, 201416.710.36
August 29, 201417.460.37
August 15, 201418.50.40
July 31, 201419.590.42
July 15, 201420.010.43
June 30, 201421.680.46
June 13, 201422.730.49
May 30, 201424.050.51
May 15, 201426.10.56
April 30, 201427.210.58
April 15, 201428.20.60
March 31, 201427.70.59
March 14, 201441.250.53
February 28, 201435.980.46
February 14, 201435.320.45
January 31, 201436.360.46
January 15, 201429.720.38
December 31, 201324.10.31
December 13, 201324.820.32
November 29, 201314.160.18
November 15, 2013160.20
October 31, 201315.260.19
October 15, 20139.940.13
September 30, 20134.470.06
September 13, 20133.810.05
August 30, 20133.720.05
August 15, 20133.590.05
July 31, 20132.60.03
July 15, 20132.040.03
June 28, 20131.610.02
June 14, 20137.840.03
May 31, 201310.790.04
May 15, 201311.080.04
April 30, 201311.240.04
April 15, 20139.830.04
March 28, 201311.80.03
March 15, 201310.430.03
February 28, 20138.820.03
February 15, 201311.20.03
January 31, 20134.590.01
January 15, 20134.670.01
December 31, 20124.840.01
December 14, 20121.510.00
November 30, 20120.450.00
November 15, 20121.550.00
October 31, 20121.580.00
October 15, 20121.940.00
September 28, 20122.010.01
September 14, 20121.770.00
August 31, 20121.680.00
August 15, 20121.980.00
July 31, 20121.70.00
July 13, 20122.190.01
June 29, 20122.220.01
June 15, 20122.720.01
May 31, 20123.070.01
May 15, 20123.490.01
April 30, 20124.340.01
April 13, 20124.50.01
March 30, 20125.410.01
March 15, 20128.280.01
February 29, 20128.910.02
February 15, 201290.02
January 31, 201212.420.02
January 13, 201210.690.02
December 30, 20119.910.02
December 15, 20116.360.01
November 30, 20117.80.01
November 15, 20113.260.01
October 31, 20113.630.01
October 14, 20113.850.01
September 30, 20114.170.01
September 15, 20114.710.01
August 31, 20116.720.01
August 15, 201111.120.02
July 29, 201112.030.02
July 15, 201112.10.02
June 30, 201112.490.02
June 15, 201112.510.02
May 31, 201111.240.02
May 13, 20113.490.01
April 29, 20111.740.00
April 15, 20111.930.00
March 31, 20111.920.00
March 15, 20112.210.00
February 28, 20112.20.00
February 15, 20112.270.00
January 31, 20112.430.00
January 14, 20112.70.00
December 31, 20102.370.00
December 15, 20102.440.00
November 30, 20102.410.00
November 15, 20102.370.00
October 29, 20102.410.00
October 15, 20103.20.00
September 30, 20104.180.01
September 15, 20104.670.01
August 31, 20105.420.01
August 13, 20105.970.01
July 30, 20106.510.01
July 15, 20107.750.01
June 30, 20108.150.01
June 15, 20109.180.01
May 28, 20109.960.02
May 14, 201010.620.02
April 30, 201012.950.02
April 15, 201014.030.02

Institutional Ownership History (%)

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

Date Institutional Ownership (%)Institutional Ownership (Shares in Mil)
June 30, 201730.623.07
March 31, 201742.133.91
December 31, 201645.114.09
September 30, 201649.954.49
June 30, 201650.64.58
March 31, 201651.844.72
December 31, 201550.214.54
September 30, 201561.244.50
September 30, 20140.630.93
December 31, 201321.883.43
June 30, 20121.030.88
September 30, 20111.170.86
March 31, 20111.180.73
September 30, 20101.120.69
March 31, 20094.10.31
March 31, 20060.020.07

Insider ownership (%)

This is the historical insider ownership of ARCA biopharma 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, 20174.490.41
May 31, 20174.520.41
April 30, 20174.420.40
March 31, 20174.20.38
February 28, 20174.220.38
January 31, 20174.220.38
December 31, 20164.230.38
November 30, 20164.230.38
October 31, 20164.230.38
September 30, 20164.280.39
August 31, 20164.280.39
July 31, 20164.280.39
June 30, 20164.280.39
May 31, 20164.280.39
April 30, 20164.280.39
March 31, 20164.310.39
February 29, 20164.310.39
January 31, 20164.330.39
December 31, 20154.310.39
November 30, 20154.330.39
October 31, 20153.960.39
September 30, 20154.350.39
August 31, 20151.50.95
July 31, 20151.50.95
June 30, 20151.50.95
May 31, 20151.50.95
April 30, 20154.490.95
March 31, 20154.490.95
February 28, 20154.50.95
January 31, 20153.950.84
December 31, 20142.940.62
November 30, 20143.420.72
October 31, 20143.450.72
September 30, 20143.450.72
August 31, 20143.550.75
July 31, 20143.550.75
June 30, 20143.550.75
May 31, 20143.550.75
March 31, 20147.090.75
February 28, 20147.090.75
January 31, 20145.910.62
December 31, 20135.910.62
November 30, 20135.910.62
October 31, 20135.910.62
September 30, 20135.910.62
August 31, 20134.150.44
July 31, 20134.150.44
June 30, 20134.150.44
May 31, 20133.410.36
April 30, 20135.630.59
March 31, 20135.630.59
January 31, 20135.630.59
November 30, 20125.630.59
October 31, 20125.630.59
September 30, 20125.020.53
August 31, 20125.020.53
July 31, 20125.020.53
June 30, 20125.020.53
May 31, 20125.020.53
April 30, 20125.020.53
March 31, 20125.020.53
February 29, 20125.020.53
January 31, 20125.020.53
December 31, 20115.020.53
November 30, 20115.020.53
October 31, 20115.020.53
September 30, 20115.020.53
August 31, 20115.020.53
July 31, 20115.020.53
June 30, 20115.020.53
May 31, 20115.020.53
April 30, 20115.980.53
March 31, 20115.980.53
February 28, 20115.980.53
January 31, 20115.980.53
December 31, 20105.980.53
November 30, 20105.980.53
October 31, 20105.980.53
September 30, 20105.980.53
August 31, 20105.980.53
July 31, 20106.050.53
June 30, 20106.050.53
May 31, 20106.020.53
April 30, 20107.430.57
March 31, 20107.430.57
February 28, 20103.890.30
January 31, 20103.890.30
December 31, 20093.890.30
November 30, 20093.850.29
October 31, 20093.860.29
September 30, 20090.350.03
August 31, 20090.350.03
July 31, 20090.350.03
June 30, 20090.350.03
May 31, 20090.630.05
April 30, 20090.630.05
March 31, 20090.630.05
February 28, 20091.770.05
January 31, 20090.990.03
December 31, 20080.290.15
November 30, 20080.290.15
October 31, 20080.290.15
September 30, 20080.290.15
August 31, 20080.290.15
July 31, 20080.290.15
June 30, 20080.290.15
May 31, 20080.290.15
April 30, 20080.440.24
March 31, 20080.310.17
February 29, 20080.310.17
January 31, 20080.260.14
December 31, 20070.260.14
November 30, 20070.220.12
October 31, 20070.220.12
September 30, 20070.220.12
August 31, 20070.220.12
July 31, 20070.220.12
June 30, 20070.220.12
May 31, 20070.220.12
April 30, 20070.220.12
March 31, 20070.220.12
February 28, 200711.06
January 31, 20072.011.06
December 31, 20062.011.06
November 30, 200621.06
October 31, 200621.06
September 30, 20062.041.06
June 30, 20061.920.99
May 31, 20061.870.97
April 30, 20061.870.97
March 31, 20069.24.77
February 28, 20061.830.95
January 31, 20061.940.95
December 31, 20052.240.95
November 30, 20052.240.95
October 31, 20052.240.95
September 30, 20054.321.82
August 31, 20054.321.82
July 31, 20054.321.82
June 30, 20054.331.82
May 31, 20054.341.82
April 30, 20054.341.82
March 31, 20054.321.81
February 28, 20059.013.78
January 31, 20059.293.78
December 31, 200411.733.78
November 30, 200411.743.78
October 31, 200411.883.83
September 30, 200411.983.83
August 31, 200411.983.83
July 31, 200411.983.83

Top Direct Holders

HolderPositionShares% of Shares
Outstanding
Report Date
Mr. Patrick WheelerN/A101,5100.7%2014-09-18
Richard B. BrewerN/A83,4900.58%2009-01-27
Mark L. PerryN/A65,8330.46%2006-09-28
Dr. Michael R. Bristow,M.D.,PhDPres. & Chief Executive Offic41,8750.29%2017-02-27
Mr. Robert E. ConwayChairman of the Board25,0000.17%2017-03-24
Dr. James R. Gavin, III,M.D.,PhDN/A25,0000.17%2006-05-24
Dr. Michael D. Levy,M.D.N/A20,8210.14%2008-02-01
Christopher D. OzeroffS.V.P., General Counsel17,9350.12%2017-02-27
Thomas A. KeuerCOO14,4350.1%2017-02-27
Mr. Ted W. Love,M.D.N/A3,580less than 0.1%2008-12-31

Top Fund Holders

HolderSharesReport Date% of Shares
Outstanding
% of Total
Assets Managed
Market Value($1000)
Renaissance Technologies Corp Premium19,1842016-12-310.21N/A55
Franklin Advisers Inc   Premium Plus1,216,8402016-12-3113.40N/A3,468
Tekla Capital Management LLC   Premium Plus811,2272016-12-318.930.102,312
RA Capital Management, LLC   Premium Plus232,2452016-12-312.560.10662
NEA Management Company, LLC   Premium Plus1,460,2092016-12-3116.080.174,162
Vanguard Group Inc   Premium Plus121,6572016-12-311.34N/A347
BlackRock Fund Advisors   Premium Plus14,9982016-12-310.17N/A43
Goldman, Sachs & Co.   Premium Plus20,3262016-12-310.22N/A58
Oppenheim Asset Mgmt Services S.à r.l.   Premium Plus46,1002016-12-310.510.03131
Franklin Biotechnology Discovery Fund738,7632016-10-318.140.081,625
Franklin Biotechnology Discovery Fund478,0772016-12-315.260.111,363
Apo Asset Management GmbH72,6512017-02-280.810.04188
Vanguard Total Stock Mkt Idx56,4212017-02-280.62N/A144
APO Medical Opportunities50,1512017-02-280.560.04131
Medical Strategy GmbH38,0002017-01-310.410.0999
FCP OP MEDICAL BioHealthTrends38,0002017-01-310.410.0999
Vanguard Instl Total Stock Market Index32,1412017-02-280.35N/A82
Vanguard Extended Market Index Fund28,9672017-02-280.32N/A74
apo Medical Opportunities Institutionell22,5002017-02-280.250.0457
iShares Micro-Cap14,1332017-03-280.15N/A36

Add Notes, Comments

If you want to ask a question or report a bug, please create a support ticket.

Get WordPress Plugins for easy affiliate links on Stock Tickers and Guru Names | Earn affiliate commissions by embedding GuruFocus Charts
GuruFocus Affiliate Program: Earn up to $400 per referral. ( Learn More)

GF Chat

{{numOfNotice}}
FEEDBACK