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Keryx Biopharmaceuticals Inc (KERX) Ownership Data

Short Interest History (%)

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

Date Short Interest
April 30, 201540.12
April 15, 201538.19
March 31, 201537.82
March 13, 201535.59
February 27, 201532.29
February 13, 201530.56
January 30, 201529.98
January 15, 201529.33
December 31, 201428.87
December 15, 201427.69
November 28, 201428.07
November 14, 201427.42
October 31, 201427.63
October 15, 201429.52
September 30, 201430.35
September 15, 201424.48
August 29, 201422.84
August 15, 201423.43
July 31, 201423.51
July 15, 201422.05
June 30, 201422.25
June 13, 201422.37
May 30, 201422.02
May 15, 201422.65
April 30, 201422.22
April 15, 201424.77
March 31, 201423.84
March 14, 201423.48
February 28, 201422.76
February 14, 201422.93
January 31, 201420.77
January 15, 201423.84
December 31, 201323.19
December 13, 201322.51
November 29, 201322.37
November 15, 201323.25
October 31, 201320.73
October 15, 201319.21
September 30, 201319.44
September 13, 201319.15
August 30, 201319.28
August 15, 201319.3
July 31, 201317.92
July 15, 201319.22
June 28, 201320.11
June 14, 201320.04
May 31, 201320.91
May 15, 201321.92
April 30, 201323.61
April 15, 201321.91
March 28, 201320.74
March 15, 201316.23
February 28, 201315.37
February 15, 201317
January 31, 201317.11
January 15, 201315.76
December 31, 201216.01
December 14, 201216.38
November 30, 201216.5
November 15, 201215.07
October 31, 201214.2
October 15, 201214.15
September 28, 201214.06
September 14, 201214.74
August 31, 201215.34
August 15, 201215.41
July 31, 201215.09
July 13, 201214.65
June 29, 201215.44
June 15, 201216.05
May 31, 201216.28
May 15, 201214.36
April 30, 201214.99
April 13, 201215.88
March 30, 201222.77
March 15, 201221.58
February 29, 201219.02
February 15, 201218.62
January 31, 201218.51
January 13, 201218.23
December 30, 201118.12
December 15, 201120.89
November 30, 201121.03
November 15, 201121.75
October 31, 201119.68
October 14, 201119.16
September 30, 201118.51
September 15, 201118.69
August 31, 201117.21
August 15, 201116.57
July 29, 201116.43
July 15, 201116.31
June 30, 201115.98
June 15, 201115.16
May 31, 201115.23
May 13, 201115.16
April 29, 201115.12
April 15, 201115.86
March 31, 201113.28
March 15, 201113.49
February 28, 201113.14
February 15, 201112.95
January 31, 201113.05
January 14, 201112.91
December 31, 201013.12
December 15, 201014.54
November 30, 201013.64
November 15, 201013.6
October 29, 201013.05
October 15, 201012.59
September 30, 201011.99
September 15, 201013.38
August 31, 201013.75
August 13, 201014.1
July 30, 201015.19
July 15, 201015.57
June 30, 201017.09
June 15, 201012.55
May 28, 201011.74
May 14, 201010.81
April 30, 20107.53
April 15, 20105.86
March 31, 20103.17
March 15, 20102.75
February 26, 20102.88
February 12, 20103.43
January 29, 20103.26
January 15, 20103.04
December 31, 20092.84
December 15, 20091.57
November 30, 20091.1
November 13, 20091.29
October 30, 20091.37
October 15, 20091.17
September 30, 20092
September 15, 20090.52
August 31, 20090.55
August 14, 20091.48
July 31, 20090.64
July 15, 20090.68
June 30, 20090.66
June 15, 20090.91
May 29, 20090.68
May 15, 20090.58
April 30, 20090.88
April 15, 20090.88
March 31, 20090.91
March 13, 20091.32
February 27, 20092.3
February 13, 20092.46
January 30, 20092.81
January 15, 20092.88
December 31, 20082.93
December 15, 20083.12
November 28, 20083.38
November 14, 20083.48
October 31, 20083.55
October 15, 20083.51
September 30, 20083.56
September 15, 20082.93
August 29, 20082.92
August 15, 20083.09
July 31, 20084.17
July 15, 20084.72
June 30, 200811.6
June 13, 200812.94
May 30, 200812.82
May 15, 200813.07
April 30, 200813.77
April 15, 200815.29
March 31, 200817.53
March 14, 200823.62
February 29, 200832.85
February 15, 200827.49
January 31, 200826.74
January 15, 200825.55
December 31, 200723.47
December 11, 200723.72
November 27, 200722.09
November 9, 200720.84
October 26, 200721.22
October 10, 200720.35
September 25, 200718.26
September 11, 200718.48
August 10, 200720.71
July 10, 200722
June 12, 200721.82
May 10, 200720.97
April 10, 200718.39
March 12, 200717.61
February 12, 200714.97
January 9, 200712.3
December 12, 200610.87
November 10, 200610.17
October 10, 200610.86
September 12, 200610.85
August 10, 200610.29
July 11, 200610.48
June 12, 200610.38
May 10, 20069.27
April 10, 20067.99
March 10, 20068.02
February 10, 20066.57
January 10, 20066.21
December 12, 20055.59
November 10, 20056.47
October 11, 20056.95
September 12, 20056.7
August 10, 20057.11
July 12, 20058.67
June 10, 20058.6
May 10, 20059.15
April 12, 20059.36
March 10, 20056.08
February 10, 20055.46
January 11, 20054.93
December 10, 20043.59
November 10, 20044.37
October 12, 20044.16
September 10, 20045.38
August 10, 20044.69
July 12, 20044.46
June 9, 20043.81
May 11, 20042.78
April 12, 20042.57
March 10, 20042.16
February 10, 20041.46
January 12, 20041.08
December 10, 20031.44
November 11, 20030.31
October 10, 20030.27
September 10, 20030.3
August 12, 20030.29
July 10, 20030.28
June 10, 20030.29
May 12, 20030.27
April 10, 20030.27
March 11, 20030.28
February 11, 20030.29
January 10, 20030.29
December 10, 20020.28
November 12, 20020.29
October 10, 20020.28
September 10, 20020.3
August 12, 20020.3
July 10, 20020.31
June 11, 20020.74
May 10, 20020.9
April 10, 20020.5
March 12, 20020.38
February 12, 20020.37
January 10, 20020.35
December 11, 20010.36
November 12, 20010.67
October 10, 20010.41
September 5, 20010.38
August 10, 20010.19
July 10, 20010.34
June 12, 20010.01
May 10, 20010.01
April 9, 20010.01
March 12, 20010.01
February 12, 20010.03
January 9, 20010.26
December 12, 20000.25
November 10, 20000.32
October 10, 20000.06
September 12, 20000.01

Institutional Ownership History (%)

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

Date Institutional Ownership
April 30, 201580
March 31, 201574
February 28, 201575
January 31, 201584
December 31, 201484
November 30, 201483
October 31, 201483
September 30, 201483
August 31, 201475
July 31, 201477
June 30, 201482
May 31, 201481
April 30, 201487
March 31, 201461
February 28, 201461
January 31, 201461
December 31, 201360
November 30, 201361
October 31, 201361
September 30, 201362
August 31, 201364
July 31, 201364
June 30, 201364
May 31, 201363
April 30, 201364
March 31, 201328
February 28, 201337
January 31, 201339
December 31, 201225
November 30, 201225
October 31, 201224
September 30, 201223
August 31, 201223
July 31, 201223
June 30, 201222
May 31, 201221
April 30, 201221
March 31, 201226
February 29, 201229
January 31, 201230
December 31, 201133
November 30, 201133
October 31, 201133
September 30, 201129
August 31, 201137
July 31, 201131
June 30, 201130
May 31, 201128
April 30, 201136
March 31, 201130
February 28, 201130
January 31, 201124
December 31, 201024
November 30, 201024
October 31, 201025
September 30, 201025
August 31, 201025
July 31, 201019
June 30, 201017
May 31, 201017
April 30, 201016
March 31, 201014
February 28, 201014
January 31, 201018
December 31, 200918
November 30, 200921
October 31, 20098
September 30, 200915
August 31, 20099
July 31, 200911
June 30, 200912
May 31, 200912
April 30, 200923
March 31, 200924
February 28, 200926
January 31, 200932
December 31, 200837
November 30, 200839
October 31, 200841
September 30, 200846
August 31, 200846
July 31, 200846
June 30, 200841
May 31, 200841
April 30, 200841
March 31, 200857
February 29, 200857
January 31, 200857

Insider ownership (%)

This is the historical insider ownership of Keryx Biopharmaceuticals 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, 20156
March 31, 20156
February 28, 20156
January 31, 20157
December 31, 20147
November 30, 20147
October 31, 20147
September 30, 20147
August 31, 20147
July 31, 20147
June 30, 20147
May 31, 20147
March 31, 20149
February 28, 20149
January 31, 20149
December 31, 20139
November 30, 20139
October 31, 20139
September 30, 20139
August 31, 20139
July 31, 20139
June 30, 20139
May 31, 20139
April 30, 20139
March 31, 20139
January 31, 20139
November 30, 20129
October 31, 20129
September 30, 20129
August 31, 20129
July 31, 20129
June 30, 20129
May 31, 20129
April 30, 20128
March 31, 20128
February 29, 20128
January 31, 20128
December 31, 20118
November 30, 20118
October 31, 20118
September 30, 20118
August 31, 20118
July 31, 20118
June 30, 20118
May 31, 20118
April 30, 20119
March 31, 20119
February 28, 20119
January 31, 20119
December 31, 20109
November 30, 20109
October 31, 201010
September 30, 201010
August 31, 201010
July 31, 201010
June 30, 201010
May 31, 201010
April 30, 201012
March 31, 201012
February 28, 201012
January 31, 201011
December 31, 200911
November 30, 200911
October 31, 200911
September 30, 200911
August 31, 200913
July 31, 200913
June 30, 200913
May 31, 200913
April 30, 200912
March 31, 200911
February 28, 200912
January 31, 200912
December 31, 200812
November 30, 200812
October 31, 20087
September 30, 20087
August 31, 20087
July 31, 20086
June 30, 20086
May 31, 20086
April 30, 20086
March 31, 20086
February 29, 20086
January 31, 20086
December 31, 20076
November 30, 20076
October 31, 20076
September 30, 20076
August 31, 20076
July 31, 20076
June 30, 20076
May 31, 20078
April 30, 20078
March 31, 20078
February 28, 20078
January 31, 20078
December 31, 20068
November 30, 20068
October 31, 20068
September 30, 20068
June 30, 20068
May 31, 20068
April 30, 20069
March 31, 200613
February 28, 20064
January 31, 20064
December 31, 20057
November 30, 20057
October 31, 20059
September 30, 20059
August 31, 20059
July 31, 20059
June 30, 20059
May 31, 200511
April 30, 200511
March 31, 200511
February 28, 200512
January 31, 200513
December 31, 200413
November 30, 200413
October 31, 200422
September 30, 200413
August 31, 200413
July 31, 200413
June 30, 200413
May 31, 200413
April 30, 200413
March 31, 200418
February 29, 200417

Top Direct Holders

HolderPositionShares% of Shares
Outstanding
Report Date
Dr. Lindsay A. Rosenwald, M.D.Director, 10% Owner1,735,8631.68%2006-05-22
Michael S. Weiss10% Owner1,320,4181.27%2010-04-23
Ron BentsurCEO778,8010.75%2015-01-04
Peter Morgan KashN/A760,7500.73%2004-01-29
Michael P. TarnokDirector328,6000.32%2015-05-06
James F. OlivieroCFO211,3490.2%2015-05-12
Senator Wyche Fowler,JrN/A165,0000.16%2014-06-24
Dr. Eric A. Rose, M.D.Director155,0000.15%2008-11-14
Kevin J. CameronN/A140,0000.14%2014-06-24
I. Craig Henderson,M.D.N/A132,1250.13%2007-04-25

Top Fund Holders

HolderSharesReport Date% of Shares
Outstanding
% of Total
Assets Managed
Market Value
Baupost Group LLC Premium18,300,0002014-12-3119.755.07258,945,000
Vanguard Group, Inc.   Premium Plus5,690,2382014-12-316.140.0180,517,000
Franklin Advisers, Inc.   Premium Plus5,316,8002014-12-315.740.0675,233,000
Fidelity Management and Research Company   Premium Plus3,979,1252014-12-314.290.0156,305,000
Fidelity® Select Biotechnology Portfolio3,548,0502015-03-313.420.3245,166,676
Oak Ridge Investments, LLC   Premium Plus3,286,8442015-03-313.170.9441,841,000
Sectoral Asset Management Inc   Premium Plus3,257,3582014-12-313.512.0746,092,000
Camber Capital Management LLC   Premium Plus3,000,0002014-12-313.242.8442,450,000
State Street Corp   Premium Plus2,653,3952014-12-312.860.0037,549,000
Pictet-Biotech2,480,4462014-09-302.692.3733,982,106

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