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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 (%)Short Interest (Shares in Mil)
May 15, 201721.7717.50
April 28, 201727.3121.95
April 13, 201727.4322.05
March 31, 201727.6322.21
March 15, 201725.620.57
February 28, 201726.5420.71
February 15, 201727.1521.20
January 31, 201727.821.70
January 13, 201726.7820.90
December 30, 201625.5919.97
December 15, 201625.7220.08
November 30, 201627.0221.10
November 15, 201627.6121.55
October 31, 201629.122.71
October 14, 201626.7920.91
September 30, 201626.4520.65
September 15, 201624.7419.31
August 31, 201621.5916.85
August 15, 201622.0117.18
July 29, 201622.5117.57
July 15, 201621.6316.89
June 30, 201622.317.41
June 15, 201625.4619.88
May 31, 201625.1719.65
May 13, 201625.5119.92
April 29, 201626.1520.41
April 15, 201625.4819.89
March 31, 201629.0122.65
March 15, 201629.5823.09
February 29, 201630.0125.03
February 12, 201629.0924.27
January 29, 201628.8224.04
January 15, 201630.0225.04
December 31, 201528.2323.55
December 15, 201532.0826.75
November 30, 201530.8225.71
November 13, 201533.5127.95
October 30, 201534.328.61
October 15, 201536.2430.23
September 30, 201544.737.28
September 15, 201540.0633.41
August 31, 201541.0734.25
August 14, 201542.7935.69
July 31, 20154235.03
July 15, 201540.8834.10
June 30, 201540.3133.62
June 15, 201538.432.03
May 29, 201536.0130.04
May 15, 201540.1233.46
April 30, 201540.1233.47
April 15, 201538.1930.93
March 31, 201537.8230.64
March 13, 201535.5928.83
February 27, 201532.2926.16
February 13, 201530.5624.75
January 30, 201529.9824.29
January 15, 201529.3323.76
December 31, 201428.8723.39
December 15, 201427.6922.43
November 28, 201428.0722.74
November 14, 201427.4222.21
October 31, 201427.6322.38
October 15, 201429.5223.91
September 30, 201430.3524.59
September 15, 201424.4821.91
August 29, 201422.8420.43
August 15, 201423.4320.97
July 31, 201423.5121.04
July 15, 201422.0519.74
June 30, 201422.2519.91
June 13, 201422.3720.02
May 30, 201422.0219.70
May 15, 201422.6520.27
April 30, 201422.2219.89
April 15, 201424.7717.69
March 31, 201423.8417.02
March 14, 201423.4816.77
February 28, 201422.7616.25
February 14, 201422.9316.37
January 31, 201420.7714.83
January 15, 201423.8417.02
December 31, 201323.1916.56
December 13, 201322.5116.07
November 29, 201322.3715.97
November 15, 201323.2516.61
October 31, 201320.7314.80
October 15, 201319.2113.72
September 30, 201319.4413.88
September 13, 201319.1513.67
August 30, 201319.2813.77
August 15, 201319.313.78
July 31, 201317.9212.79
July 15, 201319.2213.72
June 28, 201320.1114.36
June 14, 201320.0414.31
May 31, 201320.9114.93
May 15, 201321.9215.65
April 30, 201323.6116.86
April 15, 201321.9115.32
March 28, 201320.7414.50
March 15, 201316.2311.35
February 28, 201315.3710.74
February 15, 20131711.88
January 31, 201317.1111.96
January 15, 201315.7611.02
December 31, 201216.0111.19
December 14, 201216.3811.45
November 30, 201216.511.53
November 15, 201215.0710.53
October 31, 201214.29.93
October 15, 201214.159.89
September 28, 201214.069.83
September 14, 201214.7410.30
August 31, 201215.3410.72
August 15, 201215.4110.77
July 31, 201215.0910.55
July 13, 201214.6510.24
June 29, 201215.4410.79
June 15, 201216.0511.22
May 31, 201216.2811.38
May 15, 201214.3610.04
April 30, 201214.9910.48
April 13, 201215.889.64
March 30, 201222.7713.82
March 15, 201221.5813.10
February 29, 201219.0211.54
February 15, 201218.6211.30
January 31, 201218.5111.23
January 13, 201218.2311.06
December 30, 201118.1211.00
December 15, 201120.8912.68
November 30, 201121.0312.76
November 15, 201121.7513.20
October 31, 201119.6811.94
October 14, 201119.1611.63
September 30, 201118.5111.23
September 15, 201118.6911.34
August 31, 201117.2110.44
August 15, 201116.5710.05
July 29, 201116.439.97
July 15, 201116.319.90
June 30, 201115.989.70
June 15, 201115.169.20
May 31, 201115.239.24
May 13, 201115.169.20
April 29, 201115.129.18
April 15, 201115.868.91
March 31, 201113.287.47
March 15, 201113.497.58
February 28, 201113.147.38
February 15, 201112.957.28
January 31, 201113.057.34
January 14, 201112.917.26
December 31, 201013.127.38
December 15, 201014.548.18
November 30, 201013.647.67
November 15, 201013.67.65
October 29, 201013.057.33
October 15, 201012.597.08
September 30, 201011.996.74
September 15, 201013.387.52
August 31, 201013.757.73
August 13, 201014.17.93
July 30, 201015.198.54
July 15, 201015.578.75
June 30, 201017.099.61
June 15, 201012.557.05
May 28, 201011.746.60
May 14, 201010.816.08
April 30, 20107.534.23

Institutional Ownership History (%)

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

Date Institutional Ownership (%)Institutional Ownership (Shares in Mil)
March 31, 201760.1365.21
December 31, 201660.5664.09
September 30, 201660.0963.65
June 30, 201659.6263.12
March 31, 201660.1763.67
December 31, 201567.3570.82
September 30, 201583.4786.98
June 30, 201586.5991.06
March 31, 201589.3392.56
December 31, 201483.1677.08
September 30, 201483.5176.82
June 30, 201474.9968.78
March 31, 201473.9867.52
December 31, 201362.5751.71
September 30, 201361.4450.22
June 30, 201362.0350.75
March 31, 201364.2252.51
December 31, 20122719.43
September 30, 201227.1519.53
June 30, 20122517.98
March 31, 201221.8815.58
December 31, 201127.7819.73
September 30, 201129.6821.08
June 30, 201135.9225.04
March 31, 201129.9218.41
December 31, 201029.4918.11
September 30, 201023.4414.34
June 30, 201023.1413.63
March 31, 201018.9710.83
December 31, 200915.818.93
September 30, 200918.4810.32
June 30, 20097.963.80
March 31, 200910.615.05
December 31, 200824.9411.27
September 30, 200847.2121.19
June 30, 200840.8618.42
March 31, 200858.7425.89
June 30, 200699.8843.04
March 31, 200693.2443.78
December 31, 200586.4832.63
September 30, 200581.5530.72
June 30, 200573.923.43
March 31, 200568.2321.44
December 31, 200460.0819.24
September 30, 200459.8118.57
June 30, 200457.9318.04
March 31, 200443.7613.25
December 31, 200310.172.54
September 30, 20035.741.33
June 30, 20036.51.67
March 31, 20036.711.60
December 31, 20028.051.89
September 30, 20027.981.90
June 30, 200210.532.32
March 31, 200213.32.44
December 31, 200110.382.60
September 30, 20015.651.14
June 30, 20014.370.87
March 31, 20012.890.57
December 31, 20004.140.81
September 30, 20001.810.35

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 (%)Insider Ownership (Shares in Mil)
April 30, 20176.647.15
March 31, 20176.296.77
February 28, 20176.396.77
January 31, 20176.436.81
December 31, 20166.446.82
November 30, 20166.446.82
October 31, 20166.446.82
September 30, 20166.446.82
August 31, 20166.446.82
July 31, 20166.466.83
June 30, 20166.466.83
May 31, 20166.416.78
April 30, 20166.416.79
March 31, 20166.426.79
February 29, 20166.466.79
January 31, 20166.466.79
December 31, 20156.426.79
November 30, 20156.186.50
October 31, 20156.276.50
September 30, 20156.276.50
August 31, 20156.276.50
July 31, 20156.256.47
June 30, 20156.26.42
May 31, 20156.146.37
April 30, 20156.116.33
March 31, 20156.026.24
February 28, 20155.996.21
January 31, 20156.766.21
December 31, 20147.036.47
November 30, 20146.686.14
October 31, 20146.686.14
September 30, 20146.686.14
August 31, 20146.826.26
July 31, 20146.986.41
June 30, 201476.41
May 31, 20146.946.35
March 31, 20149.116.35
February 28, 20149.396.54
January 31, 20149.286.47
December 31, 20139.286.47
November 30, 20139.346.51
October 31, 20139.346.51
September 30, 20139.346.51
August 31, 20138.756.10
July 31, 20138.776.12
June 30, 20138.776.12
May 31, 20138.676.04
April 30, 20138.716.07
March 31, 20138.716.07
January 31, 20138.786.12
November 30, 20128.726.08
October 31, 20128.726.08
September 30, 20128.726.08
August 31, 20128.736.08
July 31, 20128.736.08
June 30, 20128.736.08
May 31, 20128.636.01
April 30, 20128.055.61
March 31, 201285.57
February 29, 20127.885.49
January 31, 20127.885.49
December 31, 20117.885.49
November 30, 20117.945.54
October 31, 20117.945.54
September 30, 20117.945.54
August 31, 20117.955.54
July 31, 20117.95.50
June 30, 20117.865.43
May 31, 20117.875.43
April 30, 20118.915.48
March 31, 20118.915.48
February 28, 20118.935.50
January 31, 20118.985.50
December 31, 20108.985.50
November 30, 20108.945.47
October 31, 20109.615.88
September 30, 20109.985.88
August 31, 201010.025.90
July 31, 201010.15.91
June 30, 201010.095.91
May 31, 201010.065.89
April 30, 201011.526.55
March 31, 201011.716.66
February 28, 201011.516.44
January 31, 201011.346.35
December 31, 200911.26.27
November 30, 200911.176.26
October 31, 200911.196.26
September 30, 200911.196.26
August 31, 200912.876.16
July 31, 200912.876.16
June 30, 200912.876.16
May 31, 200912.566.02
April 30, 200911.75.60
March 31, 200911.495.50
February 28, 200912.125.50
January 31, 200912.125.50
December 31, 200812.125.50
November 30, 200812.125.50
October 31, 20087.13.20
September 30, 20087.13.20
August 31, 20087.13.20
July 31, 20086.342.77
June 30, 20086.342.77
May 31, 20086.342.77
April 30, 20085.62.45
March 31, 20085.612.46
February 29, 20085.612.46
January 31, 20085.612.46
December 31, 20075.632.46
November 30, 20075.632.46
October 31, 20075.632.46
September 30, 20075.632.45
August 31, 20075.632.45
July 31, 20075.622.45
June 30, 20075.632.45
May 31, 20077.923.45
April 30, 20077.913.44
March 31, 20077.923.44
February 28, 20077.833.41
January 31, 20077.923.42
December 31, 20067.853.39
November 30, 20067.853.39
October 31, 20067.853.39
September 30, 20067.853.39
June 30, 20067.873.39
May 31, 20067.873.39
April 30, 20068.933.39
March 31, 200612.94.90
February 28, 20063.511.33
January 31, 20063.531.33
December 31, 20056.842.58
November 30, 20056.852.58
October 31, 20059.193.46
September 30, 20059.253.46
August 31, 20059.253.46
July 31, 20059.253.46
June 30, 20059.483.46
May 31, 200510.993.46
April 30, 200510.993.46
March 31, 200510.993.46
February 28, 200512.383.90
January 31, 200512.533.90
December 31, 200412.533.90
November 30, 200412.533.90
October 31, 200422.436.98
September 30, 200412.733.93
August 31, 200412.83.93
July 31, 200412.83.93
June 30, 200412.93.93
May 31, 200412.93.93
April 30, 200412.813.89
March 31, 200418.173.89
February 29, 200417.363.72

Top Direct Holders

HolderPositionShares% of Shares
Outstanding
Report Date
Dr. Lindsay A. Rosenwald, M.D.N/A1,735,8631.6%2006-05-22
Michael S. WeissN/A1,320,4181.22%2010-04-23
Ron BentsurN/A778,8010.72%2015-01-04
Peter Morgan KashN/A760,7500.7%2004-01-29
Greg MadisonPresident and CEO383,7110.35%2017-02-14
Michael P. TarnokN/A338,6000.31%2015-06-17
James F. OlivieroN/A209,4060.19%2015-07-06
Senator Wyche Fowler,JrN/A175,0000.16%2015-06-17
Kevin J. CameronN/A160,0000.15%2016-05-26
Dr. Eric A. Rose, M.D.N/A155,0000.14%2008-11-14

Top Fund Holders

HolderSharesReport Date% of Shares
Outstanding
% of Total
Assets Managed
Market Value($1000)
Baupost Group LLC Premium25,791,6782016-12-3124.371.97151,139
Pamet Capital Management, LP Premium5,719,1762016-12-315.401.2333,514
NORGES BANK   Premium Plus1,701,9352016-12-311.61N/A9,973
Franklin Advisers, Inc.   Premium Plus836,5152015-12-310.80N/A4,224
State Street Corp   Premium Plus2,896,7462016-12-312.74N/A16,973
Rice Hall James & Associates, LLC   Premium Plus1,300,9932016-12-311.230.387,624
Vanguard Group Inc   Premium Plus6,545,7622016-12-316.18N/A38,358
BlackRock Fund Advisors   Premium Plus2,647,5942016-12-312.50N/A15,515
Northern Trust Investments N A   Premium Plus957,1422016-12-310.90N/A5,609
Fidelity Management and Research Company   Premium Plus2,470,1642016-12-312.33N/A14,475
Columbia Mangmt Investment Advisers, LLC   Premium Plus1,775,5112016-12-311.680.0110,404
Deerfield Management Co   Premium Plus1,291,5312016-12-311.220.317,568
Millennium Management LLC   Premium Plus857,2342016-12-310.810.015,023
Fidelity® Select Biotechnology Portfolio1,931,8252017-01-311.830.119,640
Vanguard Small Cap Index1,835,1422017-02-281.700.019,231
Vanguard Total Stock Mkt Idx1,737,3312017-02-281.61N/A8,739
SPDR® S&P Biotech ETF1,643,7822017-03-161.680.299,090
iShares Russell 2000 (AU)1,538,7562017-03-161.570.028,509
Vanguard Extended Market Index Fund1,287,9742017-02-281.200.016,479
Vanguard Small Cap Growth Index Fund998,8562017-02-280.930.035,024

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