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Ironwood Pharmaceuticals Inc (IRWD) Ownership Data

Short Interest History (%)

Due to the license agreement change with our data vendor, Short Interest related data is no longer available on GuruFocus website.

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)
June 30, 201799.98149.54
March 31, 201795.18141.37
December 31, 201693.16137.06
September 30, 201695.47139.13
June 30, 201694.65137.43
March 31, 201698.28142.09
December 31, 201597.88140.16
March 31, 201595.54135.65
December 31, 201497.95137.99
September 30, 201496.14134.10
June 30, 201492.72128.99
March 31, 201495.86132.33
December 31, 201396.31116.65
September 30, 201392.01111.17
June 30, 201385.19102.61
March 31, 201381.5788.70
December 31, 201277.1883.14
September 30, 201276.0881.74
June 30, 201272.878.13
March 31, 201272.6277.71
December 31, 201169.1469.64
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)
December 31, 20175.27.78
November 30, 20174.656.96
October 31, 20174.646.94
September 30, 20174.646.94
August 31, 20174.646.94
July 31, 20174.646.95
June 30, 20174.686.95
May 31, 20174.66.84
April 30, 20174.636.84
March 31, 20175.387.96
February 28, 20175.387.86
January 31, 20175.347.81
December 31, 20164.586.74
November 30, 20165.37.76
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. OwensN/A183,3050.12%2017-05-31
Halley E. GilbertChief Legal Officer100,807less than 0.1%2017-06-22
Ms. Julie H. McHughDirector79,408less than 0.1%2017-12-04
Dr. Douglas E. Williams,PhDN/A75,633less than 0.1%2017-05-31
Marsha H. FanucciN/A75,633less than 0.1%2017-05-31
Dr. Christopher T. Walsh,PhDN/A71,499less than 0.1%2017-03-15
Terrance G. McguireN/A60,635less than 0.1%2017-12-15
Mr. Thomas A. McCourtChief Commercial Officer54,300less than 0.1%2017-05-15
Gina ConsylmanInterim CFO and CAO52,001less than 0.1%2017-11-10
Mr. Andrew DreyfusN/A41,884less than 0.1%2017-05-31

Top Fund Holders

HolderSharesReport Date% of Total
Assets Managed
% of Shares
Outstanding
Market Value($1000)
WELLINGTON MANAGEMENT GROUP LLP   Premium Plus18,880,1872017-09-300.07%12.61%297,742
FMR LLC   Premium Plus18,526,4272017-09-300.04%12.37%292,161
PRICE T ROWE ASSOCIATES INC /MD/   Premium Plus16,960,4902017-09-300.05%11.33%267,467
BlackRock Inc.   Premium Plus11,872,9042017-09-300.01%7.93%187,237
VANGUARD GROUP INC   Premium Plus11,015,7222017-09-300.01%7.36%173,718
HENDERSON GROUP PLC   Premium Plus7,943,1552017-09-300.08%5.3%125,264
UBS GLOBAL ASSET MANAGEMENT AMERICAS INC   Premium Plus6,407,2092017-09-300.09%4.28%101,042
BROWN CAPITAL MANAGEMENT LLC   Premium Plus6,217,5752017-09-301.19%4.15%98,051
ORBIMED ADVISORS LLC   Premium Plus5,759,2002017-09-300.87%3.85%90,823
EcoR1 Capital, LLC   Premium Plus5,459,5832017-09-3011.79%3.65%86,098
Vanguard Health Care Fund Premium4,586,0872017-09-300.16%3.06%72,323
STATE STREET CORP   Premium Plus4,545,1932017-09-300.01%3.03%71,677
ADAGE CAPITAL PARTNERS GP LLC   Premium Plus2,900,0002017-09-300.11%1.94%45,733
BVF INC/IL   Premium Plus2,820,0002017-09-305.69%1.88%44,471
PICTET ASSET MANAGEMENT LTD   Premium Plus2,622,5072017-09-300.12%1.75%41,357
BRIDGER MANAGEMENT, LLC   Premium Plus2,546,0952017-09-302.40%1.7%40,152
SECTOR GAMMA AS   Premium Plus1,825,0022017-09-304.39%1.22%28,780
BNP Paribas Investment Partners S.A.   Premium Plus1,813,4982017-09-300.25%1.21%28,599
DEUTSCHE BANK AG\   Premium Plus1,724,3742017-09-300.02%1.15%27,192
NORTHERN TRUST CORP   Premium Plus1,602,0822017-09-300.01%1.07%25,265

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