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Cerus Corp (CERS) Ownership Data

Short Interest History (%)

This is the historical short interest of Cerus Corp, as measured by the Short Percentage Of Float.

Date Short Interest
June 15, 201526.63
May 29, 201527.21
May 15, 201526.77
April 30, 201526.69
April 15, 201528.08
March 31, 201525.43
March 13, 201525.63
February 27, 201522.5
February 13, 201522.71
January 30, 201521.68
January 15, 201521.46
December 31, 201421.17
December 15, 201420.33
November 28, 201419.22
November 14, 201419.11
October 31, 201419.46
October 15, 201418.96
September 30, 201418.81
September 15, 201417.46
August 29, 201417.02
August 15, 201418.32
July 31, 201417.85
July 15, 201418
June 30, 201418.21
June 13, 201418.42
May 30, 201418.2
May 15, 201418.57
April 30, 201417.82
April 15, 201417.86
March 31, 201414.35
March 14, 201413.49
February 28, 201411.2
February 14, 201412.17
January 31, 201411.32
January 15, 201411.79
December 31, 201311.23
December 13, 201311.69
November 29, 201311.95
November 15, 201311.46
October 31, 201310.51
October 15, 201310.79
September 30, 201310.59
September 13, 201310.67
August 30, 201310.83
August 15, 201310.77
July 31, 201311.27
July 15, 201311.42
June 28, 201311.79
June 14, 201311.92
May 31, 201311.91
May 15, 201311.35
April 30, 201310.29
April 15, 201310.85
March 28, 201312.56
March 15, 201312.37
February 28, 201310.85
February 15, 201310.67
January 31, 201310.78
January 15, 201310.81
December 31, 201211.03
December 14, 201211.35
November 30, 201211.53
November 15, 201211.72
October 31, 201211.86
October 15, 201212.4
September 28, 201213.34
September 14, 201213.66
August 31, 201213.53
August 15, 201213.97
July 31, 201215.94
July 13, 201216.54
June 29, 201216.7
June 15, 201216.95
May 31, 201217.94
May 15, 201217.61
April 30, 201217.64
April 13, 201217.57
March 30, 201216.2
March 15, 201215.35
February 29, 201215.28
February 15, 201215.53
January 31, 201215.04
January 13, 201215.5
December 30, 201116.9
December 15, 201116.47
November 30, 201116.09
November 15, 201114.97
October 31, 201113.78
October 14, 201111.32
September 30, 201110.99
September 15, 201110.03
August 31, 20119.37
August 15, 20118.81
July 29, 20118.45
July 15, 20118.67
June 30, 20119.23
June 15, 20118.99
May 31, 20118.83
May 13, 20118.48
April 29, 20118.54
April 15, 20118.33
March 31, 20118.73
March 15, 20118.52
February 28, 20118.57
February 15, 20118.26
January 31, 20118.92
January 14, 20117.04
December 31, 20106.77
December 15, 20106.82
November 30, 20107.65
November 15, 20109.88
October 29, 201010.11
October 15, 20109.48
September 30, 20109.19
September 15, 20108.77
August 31, 20108.14
August 13, 20107.79
July 30, 20108.19
July 15, 20108.46
June 30, 20109.13
June 15, 20105.17
May 28, 20105.1
May 14, 20104.99
April 30, 20104.96
April 15, 20104.78
March 31, 20104.55
March 15, 20105.27
February 26, 20105.2
February 12, 20105.42
January 29, 20105.34
January 15, 20104.85
December 31, 20094.92
December 15, 20094.98
November 30, 20095.04
November 13, 20094.79
October 30, 20094.79
October 15, 20095.67
September 30, 20092.7
September 15, 20093.24
August 31, 20092.36
August 14, 20091.4
July 31, 20091.05
July 15, 20090.77
June 30, 20090.81
June 15, 20090.84
May 29, 20090.87
May 15, 20091.48
April 30, 20091.49
April 15, 20091.41
March 31, 20091.37
March 13, 20091.48
February 27, 20091.34
February 13, 20091.23
January 30, 20091.28
January 15, 20091.35
December 31, 20081.23
December 15, 20081.4
November 28, 20081.56
November 14, 20081.8
October 31, 20082.7
October 15, 20083.08
September 30, 20083.38
September 15, 20082.72
August 29, 20082.88
August 15, 20083.91
July 31, 20084.19
July 15, 20084.25
June 30, 20084.1
June 13, 20084.4
May 30, 20084.37
May 15, 20084.24
April 30, 20084.11
April 15, 20084.27
March 31, 20084.21
March 14, 20083.97
February 29, 20084.42
February 15, 20084.06
January 31, 20083.8
January 15, 20083.98
December 31, 20073.73
December 11, 20073.89
November 27, 20073.74
November 9, 20073.9
October 26, 20073.78
October 10, 20074.99
September 25, 20074.68
September 11, 20075.1
August 10, 20075.94
July 10, 200710.48
June 12, 200714.62
May 10, 200710
April 10, 20079.33
March 12, 200710.02
February 12, 20077.4
January 9, 20077.27
December 12, 20065.72
November 10, 20065.07
October 10, 20065.02
September 12, 20065.12
August 10, 20064.97
July 11, 20064.95
June 12, 20062.37
May 10, 20062.31
April 10, 20061.99
March 10, 20062.74
February 10, 20061.96
January 10, 20062.13
December 12, 20052.21
November 10, 20051.85
October 11, 20051.67
September 12, 20051.39
August 10, 20051.53
July 12, 20051.17
June 10, 20051.27
May 10, 20051.32
April 12, 20051.85
March 10, 20051.87
February 10, 20051.28
January 11, 20051.1
December 10, 20041.01
November 10, 20040.94
October 12, 20041.5
September 10, 20041.52
August 10, 20042.28
July 12, 20042.24
June 9, 20043.82
May 11, 20043.86
April 12, 20043.55
March 10, 20043.98
February 10, 20043.74
January 12, 20043.91
December 10, 20034.52
November 11, 20035.62
October 10, 20035.28
September 10, 20036.23
August 12, 20036.46
July 10, 20039.18
June 10, 200314.25
May 12, 200316.74
April 10, 200316.66
March 11, 200316.42
February 11, 200313.86
January 10, 200315.25
December 10, 200215.44
November 12, 200215.15
October 10, 200215.15
September 10, 200219.49
August 12, 200218.23
July 10, 200219.37
June 11, 200217.93
May 10, 200222.27
April 10, 200222.96
March 12, 200224.88
February 12, 200221.22
January 10, 200216.16
December 11, 200111.99
November 12, 200110.06
October 10, 20017.45
September 5, 20016.69
August 10, 20014.22
July 10, 20013.18
June 12, 20013.86
May 10, 20014.37
April 9, 20014.11
March 12, 20013.6
February 12, 20013.79
January 9, 20012.32
December 12, 20002.02
November 10, 20001.25
October 10, 20000.73
September 12, 20000.64
August 10, 20000.79
July 11, 20000.52
June 12, 20000.36
May 10, 20000.18
April 11, 20000.36
March 10, 20001.08
February 10, 20001.99
January 11, 20001.83
December 10, 19990.63
November 10, 19990.23
October 12, 19990.26
September 10, 19990.21
August 10, 19990.11
July 12, 19990.09
June 10, 19990.22
May 11, 19990.03
April 12, 19990.32
March 10, 19990.09
February 9, 19990.06
January 8, 19990.03
December 8, 19980.1
November 6, 19980.09
October 8, 19980.07
September 8, 19980.02
August 7, 19980.03
July 8, 19981.02
June 8, 19980.99
May 8, 19981.03
April 7, 19980.11
March 6, 19980.03
February 6, 19980.13
January 8, 19980.04
December 8, 19970.05
November 7, 19970.07
October 8, 19970.04
September 8, 19970.05
August 8, 19970.13
July 8, 19970.16
June 6, 19970.02
May 8, 19970.04
April 8, 19970.13

Institutional Ownership History (%)

This the Institutional Ownership History of Cerus CorpPeter Lynch prefers to buy companies with low institutional ownership.

Date Institutional Ownership
June 30, 201575
March 31, 201572
December 31, 201462
September 30, 201461
June 30, 201459
March 31, 201460
December 31, 201365
September 30, 201366
June 30, 201368
March 31, 201373
December 31, 201247
September 30, 201246
June 30, 201250
March 31, 201249
December 31, 201141
September 30, 201132
June 30, 201133
March 31, 201131
December 31, 201035
September 30, 201032
June 30, 201030
March 31, 201023
December 31, 200926
September 30, 200926
June 30, 200924
March 31, 200935
December 31, 200844
September 30, 200850
June 30, 200851
March 31, 200854
December 31, 200760
September 30, 200753
June 30, 200760
March 31, 200761
December 31, 200656
September 30, 200651
June 30, 200654
March 31, 200648
December 31, 200544
September 30, 200546
June 30, 200535
March 31, 200538
December 31, 200435
September 30, 200436
June 30, 200439
March 31, 200457
December 31, 200350
September 30, 200364
June 30, 200361
March 31, 200359
December 31, 200251
September 30, 200255
June 30, 200257
March 31, 200258
December 31, 200145
September 30, 200137
June 30, 200134
March 31, 200137
December 31, 200034
September 30, 200031
June 30, 200022
March 31, 200021

Insider ownership (%)

This is the historical insider ownership of Cerus Corp. 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, 20152
March 31, 20152
February 28, 20152
January 31, 20152
December 31, 20142
November 30, 20142
October 31, 20142
September 30, 20142
August 31, 20142
July 31, 20142
June 30, 20142
May 31, 20142
March 31, 20143
February 28, 20143
January 31, 20143
December 31, 20133
November 30, 20133
October 31, 20133
September 30, 20133
August 31, 20133
July 31, 20133
June 30, 20133
May 31, 20133
April 30, 20133
March 31, 20133
January 31, 20133
November 30, 20123
October 31, 20122
September 30, 20122
August 31, 20122
July 31, 20122
June 30, 20122
May 31, 20122
April 30, 20122
March 31, 20122
February 29, 20122
January 31, 20122
December 31, 20112
November 30, 20112
October 31, 20112
September 30, 20112
August 31, 20112
July 31, 20112
June 30, 20112
May 31, 20112
April 30, 20112
March 31, 20112
February 28, 20112
January 31, 20112
December 31, 20102
November 30, 20102
October 31, 20102
September 30, 20102
August 31, 20102
July 31, 20102
June 30, 20102
May 31, 20102
April 30, 20102
March 31, 20102
February 28, 20102
January 31, 20102
December 31, 20092
November 30, 20092
October 31, 20092
September 30, 20093
August 31, 20093
July 31, 20093
June 30, 20093
May 31, 20093
April 30, 20093
March 31, 20093
February 28, 20093
January 31, 20093
December 31, 20083
November 30, 20082
October 31, 20082
September 30, 20082
August 31, 20082
July 31, 20082
June 30, 20082
May 31, 20082
April 30, 20084
March 31, 20084
February 29, 20084
January 31, 20084
December 31, 20074
November 30, 20074
October 31, 20074
September 30, 20074
August 31, 20074
July 31, 20074
June 30, 20074
May 31, 20074
April 30, 20074
March 31, 20074
February 28, 20074
January 31, 20074
December 31, 20064
November 30, 20068
October 31, 20069
September 30, 20069
June 30, 20069
May 31, 20069
April 30, 20069
March 31, 20069
February 28, 200610
January 31, 200612
December 31, 200512
November 30, 200511
October 31, 200511
September 30, 200511
August 31, 200511
July 31, 200511
June 30, 200512
May 31, 200512
April 30, 200510
March 31, 200510
February 28, 200510
January 31, 200510
December 31, 200410
November 30, 20045
October 31, 20045
September 30, 20045
August 31, 20045
July 31, 20045
June 30, 20045
May 31, 20045
April 30, 20045
March 31, 20045
February 29, 20045

Top Direct Holders

HolderPositionShares% of Shares
Outstanding
Report Date
Dr. Laurence M. Corash,M.D.Chief Medical Officer1,084,7561.14%2015-03-05
Claes GlassellExecutive Officer and Director, Director189,4570.2%2011-01-10
William M. GreenmanPresident and CEO184,5950.19%2014-11-10
William J. DawsonCFO156,8250.16%2008-03-17
Timothy B. AndersonN/A95,4400.1%2014-12-18
Dr. David N. Cook,PhDN/A43,836less than 0.1%2007-01-05
Howard G. ErvinN/A42,846less than 0.1%2013-01-07
Stephen T. IsaacsN/A29,341less than 0.1%2004-03-19
Kevin D. GreenChief Accounting Officer17,202less than 0.1%2013-01-07
Bruce C. CozaddDirector8,788less than 0.1%2015-04-24

Top Fund Holders

HolderSharesReport Date% of Shares
Outstanding
% of Total
Assets Managed
Market Value
Baker Bros Advisors LLC   Premium Plus13,553,2752015-03-3114.240.4756,517,000
Orbimed Advisors, LLC   Premium Plus8,307,7272015-03-318.730.3034,643,000
PrimeCap Odyssey Aggressive Growth Fund7,300,0002015-03-317.670.4530,441,000
PRIMECAP Management Company Premium7,300,0002015-03-317.670.0330,441,000
BlackRock Fund Advisors   Premium Plus3,812,4992015-03-314.010.0015,898,000
Royce & Associates, LLC Premium3,145,5052015-03-313.300.0513,117,000
Vanguard Group, Inc.   Premium Plus3,072,5922015-03-313.230.0012,813,000
Fidelity Management and Research Company   Premium Plus2,680,0782014-07-313.620.009,433,875
Elk Creek Partners LLC   Premium Plus2,322,6962015-03-312.441.019,686,000
Redmile Group, LLC   Premium Plus1,647,7272015-03-311.730.626,871,000

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