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Ironwood Pharmaceuticals Inc (IRWD) Ownership Data

Short Interest History (%)

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

Date Short Interest (%)Short Interest (Shares in Mil)
November 30, 201616.312.19
November 15, 201618.1713.59
October 31, 201617.5613.14
October 14, 201617.4813.08
September 30, 201617.4213.04
September 15, 201618.4213.79
August 31, 201618.2913.68
August 15, 201618.914.14
July 29, 201618.6813.98
July 15, 201618.4913.83
June 30, 201619.3114.45
June 15, 201619.7114.75
May 31, 201620.6115.42
May 13, 201623.1917.35
April 29, 201624.6618.45
April 15, 201623.2517.40
March 31, 201623.3317.46
March 15, 201624.9518.48
February 29, 201624.1217.86
February 12, 201623.9817.76
January 29, 201622.3316.54
January 15, 201622.8316.91
December 31, 201522.9717.01
December 15, 201523.0217.04
November 30, 201525.1818.65
November 13, 201524.5918.21
October 30, 201526.2519.43
October 15, 201526.2419.43
September 30, 201524.8318.38
September 15, 201523.8817.68
August 31, 201523.1717.15
August 14, 201521.9916.28
July 31, 201522.4116.59
July 15, 201522.0316.31
June 30, 201522.816.88
June 15, 201521.6116.00
May 29, 201518.3913.62
May 15, 201518.7213.86
April 30, 201518.4213.64
April 15, 201516.7812.42
March 31, 201516.912.51
March 13, 201514.2312.61
February 27, 201513.612.06
February 13, 201514.913.20
January 30, 201515.4513.69
January 15, 201514.7713.09
December 31, 201414.8413.15
December 15, 201416.2314.39
November 28, 201416.4614.59
November 14, 201416.814.89
October 31, 201416.8714.95
October 15, 201418.3416.26
September 30, 201417.115.16
September 15, 201416.0214.20
August 29, 201415.3313.59
August 15, 201415.9914.17
July 31, 201415.6613.88
July 15, 201414.8713.18
June 30, 201415.2313.50
June 13, 201417.1415.20
May 30, 201417.3315.36
May 15, 201418.7816.65
April 30, 201419.2117.02
April 15, 201420.0417.76
March 31, 201420.5618.22
March 14, 201434.4617.73
February 28, 201433.917.44
February 14, 201441.3721.28
January 31, 201442.3921.81
January 15, 201442.0921.65
December 31, 201343.522.38
December 13, 201342.5821.90
November 29, 201342.2921.76
November 15, 201339.1620.14
October 31, 201339.5120.32
October 15, 201340.5920.88
September 30, 201341.0321.11
September 13, 201341.5521.38
August 30, 201342.2221.72
August 15, 201339.5320.34
July 31, 201337.7119.40
July 15, 201334.0117.50
June 28, 201333.0416.99
June 14, 201331.816.36
May 31, 201329.5715.21
May 15, 201333.2217.09
April 30, 201332.1516.54
April 15, 201327.314.04
March 28, 201323.6813.46
March 15, 201323.1613.16
February 28, 201323.4413.32
February 15, 201323.0913.12
January 31, 201322.7412.92
January 15, 201321.5812.26
December 31, 201219.0110.80
December 14, 201218.1110.29
November 30, 201218.3310.41
November 15, 201218.3210.41
October 31, 20121810.23
October 15, 201217.569.98
September 28, 201217.379.87
September 14, 201217.529.96
August 31, 201215.538.82
August 15, 201215.88.98
July 31, 201216.669.46
July 13, 201216.769.52
June 29, 201216.889.59
June 15, 201215.748.95
May 31, 201215.358.72
May 15, 201214.688.34
April 30, 201214.688.34
April 13, 201214.268.10
March 30, 201215.997.83
March 15, 201215.927.79
February 29, 201215.117.40
February 15, 201212.155.95
January 31, 201212.66.17
January 13, 201212.035.89
December 30, 201112.085.92
December 15, 201111.875.81
November 30, 201112.015.88
November 15, 201111.575.67
October 31, 201111.395.58
October 14, 201110.835.30
September 30, 201110.545.16
September 15, 20119.994.89
August 31, 20119.564.68
August 15, 20119.514.65
July 29, 20118.314.07
July 15, 20118.64.21
June 30, 20119.464.63
June 15, 20116.012.94
May 31, 20115.942.91
May 13, 20115.592.74
April 29, 20115.552.72
April 15, 20115.382.63
March 31, 20115.382.64
March 15, 201119.972.62
February 28, 201118.812.47
February 15, 201119.082.50
January 31, 201118.282.40
January 14, 201117.712.33
December 31, 201016.592.18
December 15, 201016.292.14
November 30, 201010.881.43
November 15, 20108.661.14
October 29, 20107.40.97
October 15, 20108.061.06
September 30, 20109.031.19
September 15, 20109.471.24
August 31, 20108.81.16
August 13, 20106.760.89
July 30, 201017.62.31
July 15, 201017.12.24
June 30, 201017.482.29
June 15, 201015.362.02
May 28, 201012.31.61
May 14, 201012.211.60
April 30, 201012.531.64
April 15, 201012.511.64
March 31, 20107.831.03
March 15, 20106.410.84
February 26, 20100.940.89
February 12, 20100.660.62

Institutional Ownership History (%)

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

Date Institutional Ownership (%)Institutional Ownership (Shares in Mil)
September 30, 201694.59137.80
June 30, 201694.25136.84
March 31, 201698.03141.72
December 31, 201597.97140.28
March 31, 201595.62135.77
December 31, 201498.06138.14
September 30, 201496.23134.22
June 30, 201492.95129.31
March 31, 201495.93132.43
December 31, 201396.6117.00
September 30, 201392.01111.17
June 30, 201384.93102.31
March 31, 201381.3488.45
December 31, 201277.2383.20
September 30, 201276.0981.76
June 30, 201272.9278.26
March 31, 201272.6277.71
December 31, 201169.1769.67
September 30, 201163.3963.70
June 30, 201158.6858.83
March 31, 201153.9453.75
December 31, 201049.8149.39
September 30, 201047.6647.02
June 30, 201032.231.63
March 31, 201034.233.54

Insider ownership (%)

This is the historical insider ownership of Ironwood Pharmaceuticals 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)
October 31, 20165.137.46
September 30, 20165.137.46
August 31, 20165.137.46
July 31, 20165.167.46
June 30, 20165.167.46
May 31, 20165.077.28
April 30, 20165.077.27
March 31, 20164.947.08
February 29, 20164.967.08
January 31, 20164.917.01
December 31, 20155.077.27
November 30, 20154.746.77
October 31, 20154.756.77
September 30, 20154.686.67
August 31, 20154.686.67
July 31, 20154.686.67
June 30, 20154.686.67
May 31, 20154.686.67
April 30, 20154.596.52
March 31, 20154.626.52
February 28, 20154.596.48
January 31, 20154.546.34
December 31, 20144.326.03
November 30, 20144.566.36
October 31, 20144.556.36
September 30, 20144.566.36
August 31, 20144.566.36
July 31, 20144.586.39
June 30, 20144.656.42
May 31, 20144.656.42
March 31, 20146.256.27
February 28, 20146.256.27
January 31, 20146.016.03
December 31, 20136.016.03
November 30, 20135.845.86
October 31, 20135.845.86
September 30, 20135.845.86
August 31, 20135.845.86
July 31, 20135.845.86
June 30, 20135.845.85
May 31, 20135.635.64
April 30, 20135.625.64
March 31, 20135.685.70
January 31, 20135.435.45
November 30, 20125.545.56
October 31, 20125.55.52
September 30, 20125.375.39
August 31, 20125.375.39
July 31, 20125.375.39
June 30, 20125.375.39
May 31, 20125.375.39
April 30, 20125.355.37
March 31, 20125.355.37
February 29, 20125.25.22
January 31, 20125.25.22
December 31, 20115.25.21
November 30, 20114.744.76
October 31, 20114.744.75
September 30, 20114.744.75
August 31, 20114.744.75
July 31, 20114.684.68
June 30, 20114.684.68
May 31, 20114.554.56
April 30, 20114.584.56
March 31, 20114.584.56
February 28, 20114.614.56
January 31, 20114.134.08
December 31, 20104.134.08
November 30, 20104.023.98
October 31, 20100.050.04
September 30, 20100.050.04
August 31, 20100.040.04
July 31, 20100.040.04
June 30, 20100.020.02
May 31, 20100.020.02
April 30, 20100.020.02
March 31, 20100.020.02
February 28, 20100.020.02

Top Direct Holders

HolderPositionShares% of Shares
Outstanding
Report Date
Mr. Edward P. OwensDirector167,6800.11%2016-06-01
Dr. Christopher T. Walsh,PhDN/A71,196less than 0.1%2016-09-15
Ms. Julie H. McHughN/A66,783less than 0.1%2016-06-01
Halley E. GilbertChief Legal Officer65,467less than 0.1%2016-11-11
David E. ShawN/A64,306less than 0.1%2014-03-14
Mr. George H. ConradesN/A62,221less than 0.1%2015-06-03
Dr. Douglas E. Williams,PhDN/A60,008less than 0.1%2016-06-01
Marsha H. FanucciN/A60,008less than 0.1%2016-06-01
Terrance G. McguireN/A44,253less than 0.1%2016-09-15
Joseph C. Cook,JrN/A42,775less than 0.1%2015-03-11

Top Fund Holders

HolderSharesReport Date% of Shares
Outstanding
% of Total
Assets Managed
Market Value($1000)
Adage Capital Partners Gp LLC   Premium Plus5,424,6002016-09-303.720.2486,143
T. Rowe Price Associates, Inc.   Premium Plus8,770,8932016-09-306.020.03139,282
State Street Corp   Premium Plus3,427,9362016-09-302.350.0154,440
Janus Capital Management LLC   Premium Plus13,197,3202016-09-309.060.26209,574
Orbimed Advisors, LLC   Premium Plus9,949,0002016-09-306.831.80157,990
Bridger Management LLC   Premium Plus3,924,3332016-09-302.694.2062,318
Vanguard Group Inc   Premium Plus9,658,3332016-09-306.630.01153,374
BlackRock Fund Advisors   Premium Plus5,750,0712016-09-303.950.0291,311
Fidelity Management and Research Company   Premium Plus19,417,8012016-09-3013.330.04308,355
Consonance Capital Management LP   Premium Plus3,296,5392016-09-302.265.0452,349
Wellington Management Company LLP   Premium Plus18,181,1572016-09-3012.480.07288,717
Fidelity® Growth Company Fund6,165,1192016-10-314.230.2278,729
Vanguard Health Care Fund4,522,3872016-09-303.100.1571,816
Fidelity® Select Biotechnology Portfolio4,112,0102016-10-312.820.5352,510
T. Rowe Price Health Sciences Fund4,052,4952016-09-302.780.5764,354
Hartford MidCap Fund3,202,1642016-10-312.200.6440,892
Fidelity® OTC Portfolio3,015,6422016-10-312.070.2838,510
Janus Triton Fund3,009,6602016-09-302.070.6647,793
T. Rowe Price New Horizons Fund2,968,2572016-09-302.040.2947,136
Vanguard Small Cap Index2,823,9882016-10-311.940.0636,062

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