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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
August 15, 20162.95
July 29, 20163.33
July 15, 20163.46
June 30, 20163.95
June 15, 20163.73
May 31, 20163.7
May 13, 20163.83
April 29, 20164.66
April 15, 20165.06
March 31, 20165.9
March 15, 20167.91
February 29, 20167.47
February 12, 20167.46
January 29, 20166.65
January 15, 20165.98
December 31, 20156.57
December 15, 20157.61
November 30, 20157.75
November 13, 20156.56
October 30, 20156.75
October 15, 20157.29
September 30, 20157.51
September 15, 20154.77
August 31, 20154.47
August 14, 20155.19
July 31, 20156.16
July 15, 20155.51
June 30, 20155.09
June 15, 20154.93
May 29, 20155.23
May 15, 20155.84
April 30, 20156.73
April 15, 20155.28
March 31, 20154.77
March 13, 20156.88
February 27, 20156.51
February 13, 20156.62
January 30, 20157.03
January 15, 20157.14
December 31, 20148.44
December 15, 20149.1
November 28, 20148.85
November 14, 201411.29
October 31, 201412.19
October 15, 201414.98
September 30, 201415.57
September 15, 201416.71
August 29, 201417.46
August 15, 201418.5
July 31, 201419.59
July 15, 201420.01
June 30, 201421.68
June 13, 201422.73
May 30, 201424.05
May 15, 201426.1
April 30, 201427.21
April 15, 201428.2
March 31, 201427.7
March 14, 201441.25
February 28, 201435.98
February 14, 201435.32
January 31, 201436.36
January 15, 201429.72
December 31, 201324.1
December 13, 201324.82
November 29, 201314.16
November 15, 201316
October 31, 201315.26
October 15, 20139.94
September 30, 20134.47
September 13, 20133.81
August 30, 20133.72
August 15, 20133.59
July 31, 20132.6
July 15, 20132.04
June 28, 20131.61
June 14, 20137.84
May 31, 201310.79
May 15, 201311.08
April 30, 201311.24
April 15, 20139.83
March 28, 201311.8
March 15, 201310.43
February 28, 20138.82
February 15, 201311.2
January 31, 20134.59
January 15, 20134.67
December 31, 20124.84
December 14, 20121.51
November 30, 20120.45
November 15, 20121.55
October 31, 20121.58
October 15, 20121.94
September 28, 20122.01
September 14, 20121.77
August 31, 20121.68
August 15, 20121.98
July 31, 20121.7
July 13, 20122.19
June 29, 20122.22
June 15, 20122.72
May 31, 20123.07
May 15, 20123.49
April 30, 20124.34
April 13, 20124.5
March 30, 20125.41
March 15, 20128.28
February 29, 20128.91
February 15, 20129
January 31, 201212.42
January 13, 201210.69
December 30, 20119.91
December 15, 20116.36
November 30, 20117.8
November 15, 20113.26
October 31, 20113.63
October 14, 20113.85
September 30, 20114.17
September 15, 20114.71
August 31, 20116.72
August 15, 201111.12
July 29, 201112.03
July 15, 201112.1
June 30, 201112.49
June 15, 201112.51
May 31, 201111.24
May 13, 20113.49
April 29, 20111.74
April 15, 20111.93
March 31, 20111.92
March 15, 20112.21
February 28, 20112.2
February 15, 20112.27
January 31, 20112.43
January 14, 20112.7
December 31, 20102.37
December 15, 20102.44
November 30, 20102.41
November 15, 20102.37
October 29, 20102.41
October 15, 20103.2
September 30, 20104.18
September 15, 20104.67
August 31, 20105.42
August 13, 20105.97
July 30, 20106.51
July 15, 20107.75
June 30, 20108.15
June 15, 20109.18
May 28, 20109.96
May 14, 201010.62
April 30, 201012.95
April 15, 201014.03
March 31, 201018.09
March 15, 20102.85
February 26, 20102.92
February 12, 20103.01
January 29, 20102.97
January 15, 20103.04
December 31, 20093.01
December 15, 20093.02
November 30, 20092.71
November 13, 20090.62
October 30, 20090.67
October 15, 20090.67
September 30, 20090.79
September 15, 20090.89
August 31, 20090.79
August 14, 20090.78
July 31, 20091.64
July 15, 20090.32
June 30, 20090.7
June 15, 20091.22
May 29, 20090.44
May 15, 20090.4
April 30, 20090.43
April 15, 20090.2
March 31, 20090.23
March 13, 20090.09
February 27, 20090.4
February 13, 20090.26
January 30, 20090.43
January 15, 20090.51
December 31, 20080.49
December 15, 20080.53
November 28, 20080.62
November 14, 20081.37
October 31, 20081.78
October 15, 20082.77
September 30, 20081.9
September 15, 20081.87
August 29, 20081.9
August 15, 20081.87
July 31, 20081.98
July 15, 20082.13
June 30, 20082.07
June 13, 20082.03
May 30, 20082.1
May 15, 20082.02
April 30, 20082.16
April 15, 20082.33
March 31, 20082.18
March 14, 20082.97
February 29, 20082.93
February 15, 20082.89
January 31, 20082.74
January 15, 20082.95
December 31, 20072.87
December 11, 20072.99
November 27, 20073.9
November 9, 20073.34
October 26, 20073.42
October 10, 20073.95
September 25, 20073.86
September 11, 20075.16
August 10, 20075.76
July 10, 20078.02
June 12, 200715.13
May 10, 200713.97
April 10, 200716.89
March 12, 20079.77
February 12, 20077.71
January 9, 20078.82
December 12, 20068.87
November 10, 20068.55
October 10, 20069.8
September 12, 200610.74
August 10, 20069.88
July 11, 20069.72
June 12, 20069.36
May 10, 20067.79
April 10, 20067.28
March 10, 20066.09
February 10, 20065.82
January 10, 20066.9
December 12, 20054.93
November 10, 20055.11
October 11, 20054.48
September 12, 20053.7
August 10, 20053.58
July 12, 20053.73
June 10, 20054.13
May 10, 20054.26
April 12, 20054.34
March 10, 20053.2
February 10, 20053.04
January 11, 20053.55
December 10, 20043.29
November 10, 20043.54
October 12, 20043.88
September 10, 20044.15
August 10, 20043.68
July 12, 20043.43
June 9, 20042.82
May 11, 20042.32
April 12, 20041.69
March 10, 20041.12
February 10, 20042.05
January 12, 20040.57
December 10, 20030.89
November 11, 20030.83
October 10, 20030.52
September 10, 20030.27
August 12, 20030.32
July 10, 20030.87
June 10, 20030.18
May 12, 20030.14
April 10, 20030.14
March 11, 20030.79
February 11, 20032.04
January 10, 20036.98
December 10, 20026.76
November 12, 20023.43
October 10, 20021.51
September 10, 20021.59
August 12, 20022.62
July 10, 20023.85
June 11, 20023.89
May 10, 20025
April 10, 20024.73
March 12, 20024.44
February 12, 20024.56
January 10, 20025.43
December 11, 20017.67
November 12, 20017.3
October 10, 20013.58
September 5, 20013.67
August 10, 20012.54
July 10, 20012.13
June 12, 20012.66
May 10, 20011.92
April 9, 20011.59
March 12, 20012.46
February 12, 20012.31
January 9, 20012.21
December 12, 20001.5
November 10, 20001.58
October 10, 20001.59
September 12, 20001.63
August 10, 20002.52
July 11, 20004.02
June 12, 20003.25
May 10, 20003.16
April 11, 20002.37
March 10, 20001.89
February 10, 20001.75
January 11, 20000.91
December 10, 19990.44
November 10, 19990.69
October 12, 19990.7
September 10, 19990.68
August 10, 19990.73
July 12, 19990.39
June 10, 19990.35
May 11, 19990.36
April 12, 19990.34
March 10, 19990.34
February 9, 19990.35
January 8, 19990.35
December 8, 19980.34
November 6, 19980.34
October 8, 19980.39
September 8, 19980.41
August 7, 19980.39
July 8, 19980.38
June 8, 19980.39
May 8, 19980.38
April 7, 19980.13
March 6, 19980.07
February 6, 19980.26
January 8, 19980.07
December 8, 19970.06
November 7, 19970.06
October 8, 19970.17
September 8, 19970.45
August 8, 19970.53

Institutional Ownership History (%)

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

Date Institutional Ownership
June 30, 201650.6
March 31, 201651.84
December 31, 201555.59
September 30, 201561.25
September 30, 20140.63
December 31, 201321.88
June 30, 20121.03
September 30, 20111.17
March 31, 20111.18
September 30, 20101.12
March 31, 20094.1
March 31, 20060.02

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
July 31, 20164.28
June 30, 20164.28
May 31, 20164.28
April 30, 20164.28
March 31, 20164.31
February 29, 20164.31
January 31, 20164.33
December 31, 20154.31
November 30, 20154.33
October 31, 20153.96
September 30, 20154.35
August 31, 20151.5
July 31, 20151.5
June 30, 20151.5
May 31, 20151.5
April 30, 20154.49
March 31, 20154.49
February 28, 20154.5
January 31, 20153.95
December 31, 20142.94
November 30, 20143.42
October 31, 20143.45
September 30, 20143.45
August 31, 20143.55
July 31, 20143.55
June 30, 20143.55
May 31, 20143.55
March 31, 20147.09
February 28, 20147.09
January 31, 20145.91
December 31, 20135.91
November 30, 20135.91
October 31, 20135.91
September 30, 20135.91
August 31, 20134.15
July 31, 20134.15
June 30, 20134.15
May 31, 20133.41
April 30, 20135.63
March 31, 20135.63
January 31, 20135.63
November 30, 20125.63
October 31, 20125.63
September 30, 20125.02
August 31, 20125.02
July 31, 20125.02
June 30, 20125.02
May 31, 20125.02
April 30, 20125.02
March 31, 20125.02
February 29, 20125.02
January 31, 20125.02
December 31, 20115.02
November 30, 20115.02
October 31, 20115.02
September 30, 20115.02
August 31, 20115.02
July 31, 20115.02
June 30, 20115.02
May 31, 20115.02
April 30, 20115.98
March 31, 20115.98
February 28, 20115.98
January 31, 20115.98
December 31, 20105.98
November 30, 20105.98
October 31, 20105.98
September 30, 20105.98
August 31, 20105.98
July 31, 20106.05
June 30, 20106.05
May 31, 20106.02
April 30, 20107.43
March 31, 20107.43
February 28, 20103.89
January 31, 20103.89
December 31, 20093.89
November 30, 20093.85
October 31, 20093.86
September 30, 20090.35
August 31, 20090.35
July 31, 20090.35
June 30, 20090.35
May 31, 20090.63
April 30, 20090.63
March 31, 20090.63
February 28, 20091.77
January 31, 20090.99
December 31, 20080.29
November 30, 20080.29
October 31, 20080.29
September 30, 20080.29
August 31, 20080.29
July 31, 20080.29
June 30, 20080.29
May 31, 20080.29
April 30, 20080.44
March 31, 20080.31
February 29, 20080.31
January 31, 20080.26
December 31, 20070.26
November 30, 20070.22
October 31, 20070.22
September 30, 20070.22
August 31, 20070.22
July 31, 20070.22
June 30, 20070.22
May 31, 20070.22
April 30, 20070.22
March 31, 20070.22
February 28, 20071
January 31, 20072.01
December 31, 20062.01
November 30, 20062
October 31, 20062
September 30, 20062.04
June 30, 20061.92
May 31, 20061.87
April 30, 20061.87
March 31, 20069.2
February 28, 20061.83
January 31, 20061.94
December 31, 20052.24
November 30, 20052.24
October 31, 20052.24
September 30, 20054.32
August 31, 20054.32
July 31, 20054.32
June 30, 20054.33
May 31, 20054.34
April 30, 20054.34
March 31, 20054.32
February 28, 20059.01
January 31, 20059.29
December 31, 200411.73
November 30, 200411.74
October 31, 200411.88
September 30, 200411.98
August 31, 200411.98
July 31, 200411.98

Top Direct Holders

HolderPositionShares% of Shares
Outstanding
Report Date
Mr. Patrick WheelerN/A101,5101.12%2014-09-18
Richard B. BrewerN/A83,4900.92%2009-01-27
Mark L. PerryN/A65,8330.73%2006-09-28
Dr. Michael R. Bristow,M.D.,PhDSee Remarks44,6100.49%2016-06-09
Dr. James R. Gavin, III,M.D.,PhDN/A25,0000.28%2006-05-24
Dr. Michael D. Levy,M.D.N/A20,8210.23%2008-02-01
Christopher D. OzeroffS.V.P., General Counsel19,5850.22%2016-06-09
Thomas A. KeuerCOO16,0970.18%2016-06-09
Mr. Ted W. Love,M.D.N/A3,580less than 0.1%2008-12-31
Mr. Brian SelbyVP, Finance3,026less than 0.1%2016-06-09

Top Fund Holders

HolderSharesReport Date% of Shares
Outstanding
% of Total
Assets Managed
Market Value($1000)
NEA Management Company, LLC   Premium Plus1,460,2092016-06-3016.110.224,235
Franklin Advisers Inc   Premium Plus1,216,8402016-06-3013.42N/A3,529
Tekla Capital Management LLC   Premium Plus811,2272016-06-308.950.102,353
Franklin Biotechnology Discovery Fund738,7632016-04-308.160.163,110
RA Capital Management, LLC   Premium Plus562,6932016-06-306.210.231,632
Franklin Biotechnology Discovery Fund478,0772016-06-305.270.121,386
Royce & Associates, LLC Premium152,7332016-06-301.68N/A443
Vanguard Group Inc   Premium Plus121,6572016-06-301.34N/A353
Panagora Asset Management Inc   Premium Plus77,4082016-06-300.85N/A224
Vanguard Total Stock Mkt Idx56,4212016-07-310.62N/A174

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