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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
July 15, 201522.03
June 30, 201522.8
June 15, 201521.61
May 29, 201518.39
May 15, 201518.72
April 30, 201518.42
April 15, 201516.78
March 31, 201516.9
March 13, 201514.23
February 27, 201513.6
February 13, 201514.9
January 30, 201515.45
January 15, 201514.77
December 31, 201414.84
December 15, 201416.23
November 28, 201416.46
November 14, 201416.8
October 31, 201416.87
October 15, 201418.34
September 30, 201417.1
September 15, 201416.02
August 29, 201415.33
August 15, 201415.99
July 31, 201415.66
July 15, 201414.87
June 30, 201415.23
June 13, 201417.14
May 30, 201417.33
May 15, 201418.78
April 30, 201419.21
April 15, 201420.04
March 31, 201420.56
March 14, 201434.46
February 28, 201433.9
February 14, 201441.37
January 31, 201442.39
January 15, 201442.09
December 31, 201343.5
December 13, 201342.58
November 29, 201342.29
November 15, 201339.16
October 31, 201339.51
October 15, 201340.59
September 30, 201341.03
September 13, 201341.55
August 30, 201342.22
August 15, 201339.53
July 31, 201337.71
July 15, 201334.01
June 28, 201333.04
June 14, 201331.8
May 31, 201329.57
May 15, 201333.22
April 30, 201332.15
April 15, 201327.3
March 28, 201323.68
March 15, 201323.16
February 28, 201323.44
February 15, 201323.09
January 31, 201322.74
January 15, 201321.58
December 31, 201219.01
December 14, 201218.11
November 30, 201218.33
November 15, 201218.32
October 31, 201218
October 15, 201217.56
September 28, 201217.37
September 14, 201217.52
August 31, 201215.53
August 15, 201215.8
July 31, 201216.66
July 13, 201216.76
June 29, 201216.88
June 15, 201215.74
May 31, 201215.35
May 15, 201214.68
April 30, 201214.68
April 13, 201214.26
March 30, 201215.99
March 15, 201215.92
February 29, 201215.11
February 15, 201212.15
January 31, 201212.6
January 13, 201212.03
December 30, 201112.08
December 15, 201111.87
November 30, 201112.01
November 15, 201111.57
October 31, 201111.39
October 14, 201110.83
September 30, 201110.54
September 15, 20119.99
August 31, 20119.56
August 15, 20119.51
July 29, 20118.31
July 15, 20118.6
June 30, 20119.46
June 15, 20116.01
May 31, 20115.94
May 13, 20115.59
April 29, 20115.55
April 15, 20115.38
March 31, 20115.38
March 15, 201119.97
February 28, 201118.81
February 15, 201119.08
January 31, 201118.28
January 14, 201117.71
December 31, 201016.59
December 15, 201016.29
November 30, 201010.88
November 15, 20108.66
October 29, 20107.4
October 15, 20108.06
September 30, 20109.03
September 15, 20109.47
August 31, 20108.8
August 13, 20106.76
July 30, 201017.6
July 15, 201017.1
June 30, 201017.48
June 15, 201015.36
May 28, 201012.3
May 14, 201012.21
April 30, 201012.53
April 15, 201012.51
March 31, 20107.83
March 15, 20106.41
February 26, 20100.94
February 12, 20100.66

Institutional Ownership History (%)

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

Date Institutional Ownership
June 30, 201597
March 31, 201595
December 31, 201498
September 30, 201496
June 30, 201492
March 31, 201496
December 31, 201396
September 30, 201391
June 30, 201385
March 31, 201381
December 31, 201277
September 30, 201275
June 30, 201272
March 31, 201272
December 31, 201169
September 30, 201163
June 30, 201158
March 31, 201154
December 31, 201050
September 30, 201048
June 30, 201032
March 31, 201034

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
April 30, 20155
March 31, 20155
February 28, 20155
January 31, 20155
December 31, 20144
November 30, 20145
October 31, 20145
September 30, 20145
August 31, 20145
July 31, 20145
June 30, 20145
May 31, 20145
March 31, 20146
February 28, 20146
January 31, 20146
December 31, 20136
November 30, 20136
October 31, 20136
September 30, 20136
August 31, 20136
July 31, 20136
June 30, 20136
May 31, 20136
April 30, 20136
March 31, 20136
January 31, 20135
November 30, 20126
October 31, 20126
September 30, 20125
August 31, 20125
July 31, 20125
June 30, 20125
May 31, 20125
April 30, 20125
March 31, 20125
February 29, 20125
January 31, 20125
December 31, 20115
November 30, 20115
October 31, 20115
September 30, 20115
August 31, 20115
July 31, 20115
June 30, 20115
May 31, 20115
April 30, 20115
March 31, 20115
February 28, 20115
January 31, 20114
December 31, 20104
November 30, 20104

Top Direct Holders

HolderPositionShares% of Shares
Outstanding
Report Date
Michael J. HigginsCOO329,1020.23%2014-12-23
David E. ShawN/A324,7290.23%2014-03-14
Dr. Mark G. Currie,PhDChief Scientific Officer310,0000.22%2015-03-16
Joseph C. Cook,JrDirector304,0800.21%2015-03-11
Dr. Christopher T. Walsh,PhDN/A303,0260.21%2015-06-15
Mr. Edward P. OwensN/A134,006less than 0.1%2015-06-03
Mr. George H. ConradesN/A90,000less than 0.1%2015-06-03
Peter M. Hecht,PhDCEO73,418less than 0.1%2015-03-16
Mr. David A. EbersmanN/A71,519less than 0.1%2015-03-13
Marsha H. FanucciDirector44,863less than 0.1%2015-06-03

Top Fund Holders

HolderSharesReport Date% of Shares
Outstanding
% of Total
Assets Managed
Market Value
Fidelity Management and Research Company   Premium Plus19,694,8322015-03-3113.860.04315,117,000
Wellington Management Company LLP   Premium Plus17,529,1992015-03-3112.340.07280,467,000
Janus Capital Management LLC   Premium Plus14,885,6482015-03-3110.480.30238,186,000
Orbimed Advisors, LLC   Premium Plus12,012,1002015-03-318.461.64192,194,000
Vanguard Group, Inc.   Premium Plus7,997,8062015-03-315.630.01127,965,000
Morgan Stanley Investment Management Inc   Premium Plus7,077,8632015-03-314.980.21113,246,000
Fidelity® Growth Company Fund6,286,4202015-05-314.420.2188,701,386
Bt Alex Brown Inc   Premium Plus6,244,0232015-03-314.400.6199,904,000
BlackRock Fund Advisors   Premium Plus5,666,6142015-03-313.990.0290,666,000
Fidelity® Select Biotechnology Portfolio4,692,8102015-05-313.300.4266,215,549

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