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Immunogen Inc (IMGN) Ownership Data

Short Interest History (%)

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

Date Short Interest
April 30, 201518.78
April 15, 201518.95
March 31, 201521.05
March 13, 201518.65
February 27, 201518.65
February 13, 201518.44
January 30, 201517.32
January 15, 201516.11
December 31, 201415.52
December 15, 201414.3
November 28, 201414.42
November 14, 201415.06
October 31, 201415.12
October 15, 201416.57
September 30, 201416.14
September 15, 201416.8
August 29, 201415.94
August 15, 201415.69
July 31, 201416.87
July 15, 201414.93
June 30, 201414.93
June 13, 201415.4
May 30, 201415.88
May 15, 201416.74
April 30, 201416.18
April 15, 201415.39
March 31, 201414.44
March 14, 201414.82
February 28, 201414.96
February 14, 201415.07
January 31, 201415.76
January 15, 201415.91
December 31, 201315.74
December 13, 201315.87
November 29, 201315.95
November 15, 201315.69
October 31, 201316.08
October 15, 201316.16
September 30, 201316.65
September 13, 201316.32
August 30, 201315.4
August 15, 201314.42
July 31, 201313.93
July 15, 201314.69
June 28, 201314.55
June 14, 201314.57
May 31, 201314.49
May 15, 201314.39
April 30, 201314.18
April 15, 201314.37
March 28, 201313.95
March 15, 201313.79
February 28, 201313.88
February 15, 201312.95
January 31, 201313.41
January 15, 201313.5
December 31, 201213.11
December 14, 201213.39
November 30, 201213.29
November 15, 201212.69
October 31, 201212.51
October 15, 201212.17
September 28, 201212.54
September 14, 20129.57
August 31, 201217.08
August 15, 201217.35
July 31, 201216.68
July 13, 201218.93
June 29, 201218.49
June 15, 201217.4
May 31, 201217.16
May 15, 201217.56
April 30, 201217.27
April 13, 201216.67
March 30, 201215.55
March 15, 201215.4
February 29, 201214.32
February 15, 201214
January 31, 201214.81
January 13, 201215.11
December 30, 201115.09
December 15, 201115.99
November 30, 201114.88
November 15, 201114.8
October 31, 201112.66
October 14, 201112.94
September 30, 201113.5
September 15, 201112.08
August 31, 201114.18
August 15, 201113.98
July 29, 201113.25
July 15, 201114.13
June 30, 201114.97
June 15, 201114.96
May 31, 201114.54
May 13, 201115.45
April 29, 201116.07
April 15, 201118.07
March 31, 201119.43
March 15, 201119.52
February 28, 201119.92
February 15, 201119.32
January 31, 201120.72
January 14, 201120.66
December 31, 201020.78
December 15, 201022.44
November 30, 201021.91
November 15, 201021.66
October 29, 201020.67
October 15, 201018.29
September 30, 201012.98
September 15, 201014.41
August 31, 201013.71
August 13, 201012.64
July 30, 201013.32
July 15, 201013.65
June 30, 201013.28
June 15, 201012.21
May 28, 201011.38
May 14, 201011.87
April 30, 201013.97
April 15, 201013.15
March 31, 201012.24
March 15, 201011.51
February 26, 201011.5
February 12, 201010.23
January 29, 20108.71
January 15, 20108.19
December 31, 20098.54
December 15, 20098.01
November 30, 20096.76
November 13, 20096.28
October 30, 20094.51
October 15, 20094.02
September 30, 20094.22
September 15, 20093.52
August 31, 20093.52
August 14, 20093.47
July 31, 20093.91
July 15, 20094.15
June 30, 20093.42
June 15, 20093.47
May 29, 20093.28
May 15, 20093.8
April 30, 20093.3
April 15, 20093.79
March 31, 20093.44
March 13, 20093.56
February 27, 20093.14
February 13, 20093.65
January 30, 20093.74
January 15, 20095.55
December 31, 20083.75
December 15, 20086.1
November 28, 20086.12
November 14, 20086.48
October 31, 20087.29
October 15, 20087.47
September 30, 20088.38
September 15, 20089.1
August 29, 20089.22
August 15, 20089.7
July 31, 20089.17
July 15, 200810.67
June 30, 20084.44
June 13, 20084.83
May 30, 20084.64
May 15, 20084.37
April 30, 20084.08
April 15, 20084.08
March 31, 20083.75
March 14, 20083.14
February 29, 20083.29
February 15, 20083.36
January 31, 20083.13
January 15, 20082.96
December 31, 20072.64
December 11, 20072.38
November 27, 20072.85
November 9, 20073.19
October 26, 20073.13
October 10, 20073.48
September 25, 20073.45
September 11, 20073.91
August 10, 20074.21
July 10, 20074.31
June 12, 20073.93
May 10, 20073.2
April 10, 20073.38
March 12, 20073.16
February 12, 20072.84
January 9, 20072.89
December 12, 20062.62
November 10, 20062.59
October 10, 20062.87
September 12, 20062.61
August 10, 20061.99
July 11, 20062.29
June 12, 20065.7
May 10, 20064.5
April 10, 20063.94
March 10, 20063.77
February 10, 20063.47
January 10, 20063.14
December 12, 20053.1
November 10, 20053.32
October 11, 20053.34
September 12, 20053.49
August 10, 20053.41
July 12, 20053.82
June 10, 20053.34
May 10, 20053.2
April 12, 20052.98
March 10, 20052.54
February 10, 20052.19
January 11, 20051.9
December 10, 20041.58
November 10, 20041.86
October 12, 20042.43
September 10, 20042.32
August 10, 20042.35
July 12, 20042.38
June 9, 20042.06
May 11, 20042.16
April 12, 20042.14
March 10, 20041.29
February 10, 20041.36
January 12, 20041.09
December 10, 20030.98
November 11, 20030.57
October 10, 20030.93
September 10, 20031.64
August 12, 20031.93
July 10, 20031.59
June 10, 20031.79
May 12, 20031.82
April 10, 20031.9
March 11, 20031.96
February 11, 20031.92
January 10, 20031.71
December 10, 20021.89
November 12, 20021.83
October 10, 20021.85
September 10, 20021.63
August 12, 20021.09
July 10, 20021.08
June 11, 20021.12
May 10, 20021.8
April 10, 20021.4
March 12, 20021.28
February 12, 20021.32
January 10, 20021.61
December 11, 20012.05
November 12, 20012.03
October 10, 20011.82
September 5, 20012.01
August 10, 20012.34
July 10, 20012.77
June 12, 20012.58
May 10, 20011.89
April 9, 20012.91
March 12, 20013.13
February 12, 20012.95
January 9, 20011.71
December 12, 20000.43
November 10, 20002.01
October 10, 20001.21
September 12, 20001.84
August 10, 20001.04
July 11, 20001.61
June 12, 20001.1
May 10, 20001.09
April 11, 20001.04
March 10, 20002.08
February 10, 20002.74
January 11, 20004.02
December 10, 19993.77
November 10, 19993.52
October 12, 19993.52
September 10, 19993.66
August 10, 19993.66
July 12, 19993.67
June 10, 19993.73
May 11, 19993.68
April 12, 19993.72
March 10, 19993.68
February 9, 19992.08
January 8, 19991.33
December 8, 19981.58
November 6, 19981.46
October 8, 19981.39
September 8, 19981.36
August 7, 19981.37
July 8, 19981.47
June 8, 19981.55
May 8, 19981.59
April 7, 19981.15
March 6, 19981.25
February 6, 19981.18
January 8, 19981
December 8, 19970.2
November 7, 19970.27
October 8, 19972.83
September 8, 19972.81
August 8, 19972.8
July 8, 19972.7
June 6, 19973.25
May 8, 19974.32
April 8, 19973.61
March 7, 19972.77
February 7, 19972.87
January 8, 19972.89
December 6, 19961.11
November 8, 19960.17
October 8, 19960.16
September 6, 19960.31
August 8, 19960.14
July 8, 19960.1
June 7, 19960.12
May 8, 19960.05
April 8, 19960.12
March 8, 19960.05
January 8, 19960.03
December 8, 19950.27
November 8, 19950.7
October 6, 19951.11
September 8, 19950.1
August 8, 19950.22
July 7, 19950.09
June 8, 19950.05
May 8, 19950.01
April 6, 19950.01
March 8, 19950.03
February 8, 19950.03
January 6, 19950.16

Institutional Ownership History (%)

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

Date Institutional Ownership
April 30, 201594
March 31, 201588
February 28, 201589
January 31, 201587
December 31, 201492
November 30, 201493
October 31, 201493
September 30, 201492
August 31, 201491
July 31, 201492
June 30, 201494
May 31, 201497
April 30, 201497
March 31, 201493
February 28, 201493
January 31, 201490
December 31, 201393
November 30, 201390
October 31, 201389
September 30, 201385
August 31, 201384
July 31, 201385
June 30, 201383
May 31, 201378
April 30, 201379
March 31, 201378
February 28, 201378
January 31, 201379
December 31, 201280
November 30, 201281
October 31, 201280
September 30, 201277
August 31, 201276
July 31, 201283
June 30, 201280
May 31, 201279
April 30, 201279
March 31, 201279
February 29, 201281
January 31, 201281
December 31, 201178
November 30, 201178
October 31, 201178
September 30, 201183
August 31, 201181
July 31, 201180
June 30, 201180
May 31, 201180
April 30, 201175
March 31, 201176
February 28, 201176
January 31, 201173
December 31, 201072
November 30, 201072
October 31, 201072
September 30, 201073
August 31, 201073
July 31, 201077
June 30, 201074
May 31, 201076
April 30, 201061
March 31, 201069
February 28, 201062
January 31, 201061
December 31, 200961
November 30, 200961
October 31, 200954
September 30, 200965
August 31, 200965
July 31, 200948
June 30, 200953
May 31, 200959
April 30, 200956
March 31, 200955
February 28, 200955
January 31, 200958
December 31, 200857
November 30, 200857
October 31, 200854
September 30, 200843
August 31, 200843
July 31, 200843
June 30, 200846
May 31, 200846
April 30, 200846
March 31, 200836
February 29, 200836
January 31, 200836

Insider ownership (%)

This is the historical insider ownership of Immunogen 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, 20151
March 31, 20151
February 28, 20151
January 31, 20151
December 31, 20141
November 30, 20141
October 31, 20141
September 30, 20141
August 31, 20141
July 31, 20141
June 30, 20141
May 31, 20141
March 31, 20141
February 28, 20141
January 31, 20141
December 31, 20131
November 30, 20131
October 31, 20131
September 30, 20131
August 31, 20131
July 31, 20131
June 30, 20131
May 31, 20131
April 30, 20131
March 31, 20131
January 31, 20131
November 30, 20121
October 31, 20121
September 30, 20121
August 31, 20121
July 31, 20121
June 30, 20121
May 31, 20121
April 30, 20121
March 31, 20121
February 29, 20121
January 31, 20121
December 31, 20111
November 30, 20111
October 31, 20111
September 30, 20111
August 31, 20111
July 31, 20111
June 30, 20111
May 31, 20111
April 30, 20111
March 31, 20111
February 28, 20111
January 31, 20111
December 31, 20101
November 30, 20101
October 31, 20101
September 30, 20101
August 31, 20101
July 31, 20101
June 30, 20101
May 31, 20101
April 30, 20101
March 31, 20101
February 28, 20101
January 31, 20101
December 31, 20091
November 30, 20091
October 31, 20092
September 30, 20092
August 31, 20092
July 31, 20092
June 30, 20092
May 31, 20092
April 30, 20092
March 31, 20092
February 28, 20092
January 31, 20092
December 31, 20082
November 30, 20082
October 31, 20082
September 30, 20082
August 31, 20082
July 31, 20082
June 30, 20082
May 31, 20082
April 30, 20082
March 31, 20082
February 29, 20082
January 31, 20082
December 31, 20072
November 30, 20072
October 31, 20072
September 30, 20072
August 31, 20072
July 31, 20072
June 30, 20072
May 31, 20072
April 30, 20072
March 31, 20072
February 28, 20072
January 31, 20072
December 31, 20062
November 30, 20062
October 31, 20062
September 30, 20062
June 30, 20062
May 31, 20062
April 30, 20062
March 31, 20062
February 28, 20062
January 31, 20061
December 31, 20051
November 30, 20051
October 31, 20051
September 30, 20051
August 31, 20051
July 31, 20051
June 30, 20051
May 31, 20051
April 30, 20051
March 31, 20051
February 28, 20051
January 31, 20051
December 31, 20041
November 30, 20041
October 31, 20041
September 30, 20041
August 31, 20041
July 31, 20041
June 30, 20041
May 31, 20041
April 30, 20041
March 31, 20041
February 29, 20041

Top Direct Holders

HolderPositionShares% of Shares
Outstanding
Report Date
Dr. Mitchel Sayare,PhDDirector383,1360.44%2011-07-29
Mr. Daniel M. JuniusCEO141,8050.16%2015-05-07
Walter A. Blattler,PhDExecutive Vice President124,9000.14%2004-06-07
Dr. John M. Lambert, Pd.DExecutive Vice President106,8570.12%2015-05-01
Dr. Charles MorrisExecutive VP & CDO32,260less than 0.1%2014-11-28
Mr. Richard J. GregoryN/A25,000less than 0.1%2015-01-05
Mr. Craig BarrowsN/A21,100less than 0.1%2014-05-05
Mr. Mark B. SkaletskyN/A13,759less than 0.1%2004-07-01
Dr. Mark A. Goldberg, M.D.Director3,800less than 0.1%2012-11-08

Top Fund Holders

HolderSharesReport Date% of Shares
Outstanding
% of Total
Assets Managed
Market Value
ClearBridge Advisors, LLC   Premium Plus14,451,7302015-03-3116.780.13129,343,000
PRIMECAP Management Company Premium12,609,1502015-03-3114.640.11112,852,000
Fidelity Management and Research Company   Premium Plus9,089,0832015-03-3110.550.0181,347,000
PrimeCap Odyssey Growth Fund6,550,8542015-03-317.611.0658,630,143
Vanguard Group, Inc.   Premium Plus5,578,6912015-03-316.480.0049,929,000
State Street Corp   Premium Plus4,230,5822015-03-314.910.0037,863,000
Fidelity® Growth Company Fund3,802,8202015-03-314.420.0834,035,239
PrimeCap Odyssey Aggressive Growth Fund3,769,8172015-03-314.380.4933,739,862
BlackRock Fund Advisors   Premium Plus3,275,4702015-03-313.800.0129,315,000
SPDR® S&P Biotech ETF2,926,2912015-05-223.651.1426,014,727

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