Ironwood Pharmaceuticals Inc

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Ironwood Pharmaceuticals Inc
TickerIRWD
CIK #0001446847
CUSIP46333X108
SectorLife Sciences - Pharmaceutical Preparations
Address301 Binney Street, Cambridge, MA 02142
Source [EDGAR]
CIK Filing 2011 - 2025
[0001446847] 10-K
[0001446847] 10-Q
[0001446847] 3
[0001446847] 4
[0001446847] 5
[0001446847] 8-K
[0001446847] D
[0001446847] SC 13D
[0001446847] SC 13G
Form 13D/13G Filer Form 13D/13G Subject Filed % Owned
Barclays PLC Ironwood Pharmaceuticals Inc [2025-08-12] 0.0
State Street Corp Ironwood Pharmaceuticals Inc [2025-05-13] 0.0
Pacer Advisors Inc Ironwood Pharmaceuticals Inc [2025-05-02] 0.0
State Street Corp Ironwood Pharmaceuticals Inc [2025-02-05] 0.0
Armistice Capital LLC Ironwood Pharmaceuticals Inc [2024-11-14] 5.13
Renaissance Technologies LLC Ironwood Pharmaceuticals Inc [2024-11-13] 0.0
Ironwood Pharmaceuticals Inc VectivBio Holding AG [2023-07-07] 97.6
LSV Asset Management Ironwood Pharmaceuticals Inc [2023-02-10] 5.17
State Street Corp Ironwood Pharmaceuticals Inc [2023-02-02] 7.29
BlackRock Inc Ironwood Pharmaceuticals Inc [2022-07-08] 17.5
Westfield Capital Management Co LP Ironwood Pharmaceuticals Inc [2021-01-07] 5.3
Janus Henderson Group PLC Ironwood Pharmaceuticals Inc [2020-02-14] 5.3
Sarissa Capital Management LP Ironwood Pharmaceuticals Inc [2019-05-16] 6.1
Brown Capital Management LLC Ironwood Pharmaceuticals Inc [2018-12-10] 5.37
UBS Asset Management Americas Inc Ironwood Pharmaceuticals Inc [2018-02-13] 5.64
Janus Henderson Group PLC Ironwood Pharmaceuticals Inc [2018-02-13] 6.1
Price T Rowe Associates Inc /MD/ Ironwood Pharmaceuticals Inc [2016-02-11] 5.1
Point72 Asset Management LP Ironwood Pharmaceuticals Inc [2015-08-20] 1.6
OrbiMed Advisors LLC Ironwood Pharmaceuticals Inc [2015-02-17] 3.87
Janus Capital Management LLC Ironwood Pharmaceuticals Inc [2014-02-14] 5.9
Sectoral Asset Management Inc Ironwood Pharmaceuticals Inc [2014-02-11] 5.2
State of Wisconsin Investment Board Ironwood Pharmaceuticals Inc [2014-01-29] 6.323
Vanguard Group Inc Ironwood Pharmaceuticals Inc [2013-02-13] 5.5
BlackRock Inc Ironwood Pharmaceuticals Inc [2013-01-30] 6.51
Biotechnology Value Fund L P Ironwood Pharmaceuticals Inc [2012-11-05] 1.0
Form 3/4/5 Filer 2011 - 2025
Silver Ronald
Ironwood Pharmaceuticals Inc
Martini Gregory S.
Gaskins Tammi L
John Minardo
Sarissa Capital Management LP
Denner Alexander J
Currie Mark G
McHugh Julie
Dreyfus Andrew
Kessler Marla L
Shepard Jay
Moukheibir Catherine
Duane Jon R
MCCOURT Thomas A
Shetzline Michael
Emany Sravan Kumar
Davis Andrew
Rickard Jason
Owens Edward P
Olanoff Lawrence S
Consylman Gina
Kilroy Conor
Mallon Mark
MacDonald Kelly
Gilbert Halley E
McGuire Terrance
Williams Douglas E
Schulman Amy W
Fanucci Marsha
Huyett William
Hecht Peter M
Cyclerion Therapeutics, Inc.
Walsh Christopher T PhD
Graney Thomas
Roberts Bryan E
Conrades George H
Ebersman David A
Cook Joseph C Jr
Higgins Michael J
Shaw David Evans
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Form 13F Holdings
Firm Period DFND Voting Shares
Armistice Capital LLC [2025-06-30] SOLE 16,150,000 16,150,000
Sarissa Capital Management LP [2025-06-30] SOLE 15,919,435 15,919,435
Vanguard Group Inc [2025-06-30] SOLE 0 14,992,703
BlackRock, Inc. [2025-06-30] SOLE 11,836,378 12,022,998
UBS Group AG [2025-06-30] DFND 11,499,004 11,500,430
Renaissance Technologies LLC [2025-06-30] SOLE 8,406,169 8,406,169
AQR Capital Management LLC [2025-06-30] DFND 5,818,826 5,991,961
Kynam Capital Management LP [2025-06-30] SOLE 5,466,825 5,466,825
Marshall Wace LLP [2025-06-30] OTR 0 3,993,557
Charles Schwab Investment Management Inc [2025-06-30] SOLE 3,664,276 3,664,276
Geode Capital Management LLC [2025-06-30] DFND 3,499,332 3,499,332
Two Sigma Advisers LP [2025-06-30] SOLE 3,269,300 3,384,100
Bank of America Corp /DE/ [2025-06-30] DFND 18,140 3,357,872
Qube Research & Technologies Ltd [2025-06-30] SOLE 3,351,002 3,351,002
State Street Corp [2025-06-30] DFND 2,920,402 3,107,719
Two Sigma Investments LP [2025-06-30] SOLE 2,750,573 2,750,573
LSV Asset Management [2025-06-30] SOLE 1,210,269 2,750,200
Connor Clark & Lunn Investment Management Ltd [2025-06-30] SOLE 2,206,948 2,206,948
Federated Hermes Inc [2025-06-30] DFND 2,177,038 2,177,038
Jane Street Group LLC [2025-06-30] DFND 1,745,122 1,745,122
D. E. Shaw & Co., Inc. [2025-06-30] DFND 1,657,175 1,669,639
Deutsche Bank AG [2025-06-30] DFND 1,133 1,523,337
Jacobs Levy Equity Management Inc [2025-06-30] SOLE 1,111,652 1,475,046
Goldman Sachs Group Inc [2025-06-30] DFND 1,444,020 1,444,730
Northern Trust Corp [2025-06-30] DFND 1,281,026 1,282,956
Los Angeles Capital Management LLC [2025-06-30] SOLE 171,761 1,211,155
Vanguard Group Inc [2025-06-30] DFND 0 1,209,426
Amundi [2025-06-30] DFND 0 755,536
GSA Capital Partners LLP [2025-06-30] SOLE 720,860 720,860
SEI Investments Co [2025-06-30] SOLE 683,604 683,604
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