Ironwood PharmaceuticalsIRWD
13F holders, Q1 2025 (March 31)200holders −23
28new positions
51sold out
7famous investors
$1.47avg. 13F price*
At the end of Q1 2025, 200 institutions reported holding Ironwood Pharmaceuticals Inc. (IRWD) in their 13F filings, down 23 from Q4 2024. 28 opened new positions and 51 sold out. The largest holders were Sarissa Capital Management LP ($24.1M), Vanguard Group Inc. ($23.1M) and Armistice Capital, LLC ($20.1M). 7 famous investors held it, including Jim Simons / Peter Brown (0.0% of Renaissance Technologies's portfolio), Israel Englander (0.0% of Millennium Management's portfolio) and Steve Cohen (0.0% of Point72 Asset Management's portfolio).
- Company
- Ironwood Pharmaceuticals Inc.
- CUSIP
- 46333X108
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q4 2024 → Q1 2025
| Institutions | Total Value | |
|---|---|---|
| New Positions | 28 | $3.1M |
| Exits | 51 | $19.2M |
All 13F filers, Q4 2024 → Q1 2025: 36,391,307 shares bought and 45,197,086 shares sold, net −8,805,779 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 200 holders
| Sarissa Capital Management LP | 15.57% | No change | 16,390,000 | $24.1M |
| Vanguard Group Inc. | 0.00% | Reduce -19.7% | 15,696,161 | $23.1M |
| Armistice Capital, LLC | 0.54% | Add +44.7% | 13,700,000 | $20.1M |
| BlackRock, Inc. | 0.00% | Reduce -48.4% | 11,878,924 | $17.5M |
| Renaissance Technologies | 0.02% | Add +9.6% | 9,940,492 | $14.6M |
| Braidwell LP | 0.51% | Add +21.7% | 6,622,584 | $9.7M |
| Millennium Management | 0.01% | Add +191.7% | 6,359,682 | $9.3M |
| Kynam Capital Management, LP | 0.73% | Add +24.3% | 5,822,938 | $8.6M |
| LSV Asset Management | 0.01% | Reduce -2.0% | 3,997,801 | $5.9M |
| Jane Street Group, LLC | 0.01% | Add +740.5% | 3,510,117 | $5.2M |
| State Street Corp. | 0.00% | Reduce -58.0% | 3,498,289 | $5.1M |
| Geode Capital Management, LLC | 0.00% | Add +3.4% | 3,418,089 | $5.0M |
| Qube Research & Technologies Ltd | 0.01% | Add +1183.2% | 3,307,059 | $4.9M |
| Charles Schwab Investment Management Inc. | 0.00% | Add +33.5% | 2,647,015 | $3.9M |
| Acadian Asset Management LLC | 0.01% | Add +160.8% | 2,645,189 | $3.9M |
| AQR Capital Management | 0.00% | Add +535.8% | 2,523,875 | $3.7M |
| Two Sigma Advisers, LP | 0.01% | Add +52.7% | 1,884,600 | $2.8M |
| Morgan Stanley | 0.00% | Reduce -53.7% | 1,863,221 | $2.7M |
| Pacer Advisors, Inc. | 0.01% | Reduce -84.8% | 1,789,098 | $2.6M |
| JPMorgan Chase & Co. | 0.00% | Add +58.5% | 1,702,633 | $2.5M |
| Jacobs Levy Equity Management, Inc. | 0.01% | Reduce -56.4% | 1,580,320 | $2.3M |
| Goldman Sachs Group Inc. | 0.00% | Add +72.1% | 1,575,416 | $2.3M |
| Deutsche Bank AG | 0.00% | Reduce -0.8% | 1,554,154 | $2.3M |
| Point72 Asset Management | 0.01% | Add +33.1% | 1,532,565 | $2.3M |
| Connor, Clark & Lunn Investment Management Ltd. | 0.01% | Add +335.8% | 1,488,044 | $2.2M |
| Bank of America Corp. | 0.00% | Add +110.7% | 1,428,516 | $2.1M |
| Northern Trust Corp. | 0.00% | Reduce -13.4% | 1,406,534 | $2.1M |
| Federated Hermes, Inc. | 0.00% | Add +252.3% | 1,305,362 | $1.9M |
| Two Sigma Investments, LP | 0.00% | Add +42.1% | 1,227,196 | $1.8M |
| Jupiter Asset Management Ltd. | 0.02% | No change | 1,223,275 | $1.8M |
| Sio Capital Management, LLC | 0.45% | Add +12.1% | 1,017,616 | $1.5M |
| Citadel Advisors | 0.00% | Add +67.8% | 940,548 | $1.4M |
| Voleon Capital Management LP | 0.10% | Add +952.4% | 870,629 | $1.3M |
| Mariner, LLC | 0.00% | Add +607.8% | 750,000 | $1.1M |
| Royce & Associates LP | 0.01% | No change | 735,436 | $1.1M |
| Los Angeles Capital Management LLC | 0.00% | Add +107.3% | 687,787 | $1.0M |
| Susquehanna International Group, LLP | 0.00% | Add +237.1% | 648,267 | $953K |
| Marshall Wace, LLP | 0.00% | New | 557,521 | $820K |
| XTX Topco Ltd | 0.04% | Add +1104.5% | 552,613 | $812K |
| Gsa Capital Partners LLP | 0.07% | Add +3683.6% | 524,676 | $771K |
| Bank of New York Mellon Corp | 0.00% | Reduce -48.9% | 499,613 | $734K |
| ExodusPoint Capital Management, LP | 0.01% | New | 494,620 | $727K |
| FMR LLC | 0.00% | Add +58.2% | 479,741 | $705K |
| Nuveen, LLC | 0.00% | — | 471,361 | $693K |
| Walleye Capital LLC | 0.01% | Reduce -25.6% | 431,410 | $634K |
| Universal- Beteiligungs- und Servicegesellschaft mbH | 0.00% | Reduce -1.9% | 417,953 | $614K |
| Robeco Institutional Asset Management B.V. | 0.00% | No change | 380,960 | $560K |
| BNP Paribas Financial Markets | 0.00% | Add +205.3% | 374,399 | $550K |
| Catalyst Funds Management Pty Ltd | 0.13% | Add +3222.3% | 348,840 | $513K |
| Man Group plc | 0.00% | Reduce -6.0% | 333,718 | $491K |
| AXA S.A. | 0.00% | Add +15.4% | 332,810 | $489K |
| Barclays PLC | 0.00% | Reduce -10.8% | 329,389 | $484K |
| Balyasny Asset Management L.P. | 0.00% | New | 310,260 | $456K |
| Schonfeld Strategic Advisors LLC | 0.00% | Add +20.5% | 307,337 | $452K |
| Franklin Resources Inc. | 0.00% | Reduce -1.0% | 306,011 | $450K |
| Allianz Asset Management GmbH | 0.00% | Add +411.5% | 293,100 | $431K |
| State Board of Administration of Florida Retirement System | 0.00% | Add +558.8% | 292,445 | $430K |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | 0.00% | No change | 286,990 | $422K |
| Swiss National Bank | 0.00% | No change | 282,700 | $416K |
| Invesco Ltd. | 0.00% | Reduce -47.3% | 275,253 | $405K |
| Legal & General Group Plc | 0.00% | Reduce -40.5% | 250,272 | $368K |
| Inspire Investing, LLC | 0.04% | Add +159.7% | 231,825 | $341K |
| Russell Investments Group, Ltd. | 0.00% | Reduce -48.1% | 218,028 | $320K |
| EntryPoint Capital, LLC | 0.15% | Add +243.1% | 215,843 | $317K |
| OMERS ADMINISTRATION Corp | 0.00% | No change | 215,110 | $316K |
| Alberta Investment Management Corp | 0.00% | No change | 210,731 | $310K |
| Rhumbline Advisers | 0.00% | Reduce -40.2% | 208,043 | $306K |
| Parkman Healthcare Partners LLC | 0.04% | Reduce -49.8% | 205,086 | $301K |
| Graham Capital Management, L.P. | 0.01% | Add +222.9% | 203,538 | $299K |
| KLP Kapitalforvaltning As | 0.00% | Add +719.8% | 198,400 | $292K |
| Sei Investments Co. | 0.00% | Add +31.6% | 186,747 | $275K |
| Ieq Capital, LLC | 0.00% | New | 185,728 | $273K |
| Hennion & Walsh Asset Management, Inc. | 0.01% | Reduce -3.9% | 180,552 | $265K |
| Exchange Traded Concepts, LLC | 0.00% | Add +173.5% | 178,523 | $262K |
| T. Rowe Price Associates Inc. | 0.00% | Add +78.6% | 171,278 | $252K |
| Macquarie Group Ltd. | 0.00% | Add +1.4% | 169,450 | $249K |
| Alliancebernstein L.P. | 0.00% | Reduce -6.5% | 152,560 | $224K |
| California State Teachers Retirement System | 0.00% | No change | 134,137 | $197K |
| UBS Group AG | 0.00% | Reduce -94.3% | 124,271 | $183K |
| Alps Advisors Inc. | 0.00% | Reduce -9.7% | 116,860 | $172K |
| Siren, L.L.C. | 0.01% | No change | 110,532 | $162K |
| Citigroup Inc. | 0.00% | Reduce -62.8% | 110,166 | $162K |
| D. E. Shaw & Co. | 0.00% | Add +62.0% | 109,724 | $161K |
| Old West Investment Management, LLC | 0.06% | Add +74.2% | 108,211 | $159K |
| Cercano Management LLC | 0.00% | No change | 101,378 | $149K |
| Virtus Investment Advisers, LLC | 0.04% | New | 100,851 | $148K |
| Cerity Partners LLC | 0.00% | New | 96,478 | $142K |
| Principal Financial Group Inc. | 0.00% | Reduce -87.9% | 92,382 | $136K |
| Dimensional Fund Advisors LP | 0.00% | Reduce -58.6% | 90,401 | $133K |
| Intech Investment Management LLC | 0.00% | Add +53.4% | 87,787 | $129K |
| Creative Planning | 0.00% | Reduce -18.3% | 84,632 | $124K |
| Wells Fargo & Company | 0.00% | Add +2.0% | 84,251 | $124K |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | 0.00% | Reduce -6.4% | 84,096 | $124K |
| Jain Global LLC | 0.00% | Add +219.3% | 83,005 | $122K |
| Tudor Investment Corporation | 0.00% | Add +213.8% | 81,795 | $120K |
| STRS Ohio | 0.00% | No change | 76,600 | $113K |
| Corebridge Financial, Inc. | 0.00% | Reduce -8.0% | 69,310 | $102K |
| MetLife Investment Management, LLC | 0.00% | Reduce -24.7% | 67,229 | $99K |
| Amundi | 0.00% | Add +12.9% | 69,980 | $95K |
| Janus Henderson Group PLC | 0.00% | No change | 66,187 | $94K |
"% of holder's portfolio" is IRWD's weight in each manager's 13F, not the share of Ironwood Pharmaceuticals Inc. the manager owns.