Ironwood PharmaceuticalsIRWD
13F holders, Q4 2024 (December 31)223holders +2
31new positions
37sold out
7famous investors
$4.43avg. 13F price*
At the end of Q4 2024, 223 institutions reported holding Ironwood Pharmaceuticals Inc. (IRWD) in their 13F filings, up 2 from Q3 2024. 31 opened new positions and 37 sold out. The largest holders were BlackRock, Inc. ($102.1M), Vanguard Group Inc. ($86.6M) and Sarissa Capital Management LP ($72.6M). 7 famous investors held it, including Jim Simons / Peter Brown (0.1% of Renaissance Technologies's portfolio), Steve Cohen (0.0% of Point72 Asset Management's portfolio) and Israel Englander (0.0% of Millennium Management's portfolio).
- Company
- Ironwood Pharmaceuticals Inc.
- CUSIP
- 46333X108
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q3 2024 → Q4 2024
| Institutions | Total Value | |
|---|---|---|
| New Positions | 31 | $14.1M |
| Exits | 37 | $13.7M |
All 13F filers, Q3 2024 → Q4 2024: 14,252,292 shares bought and 14,109,517 shares sold, net +142,775 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 223 holders
| BlackRock, Inc. | 0.00% | Add +0.5% | 23,037,335 | $102.1M |
| Vanguard Group Inc. | 0.00% | Reduce -11.3% | 19,538,555 | $86.6M |
| Sarissa Capital Management LP | 22.49% | No change | 16,390,000 | $72.6M |
| Pacer Advisors, Inc. | 0.12% | Add +4.0% | 11,730,771 | $52.0M |
| Armistice Capital, LLC | 0.98% | Add +15.5% | 9,468,000 | $41.9M |
| Renaissance Technologies | 0.06% | Add +5.5% | 9,066,241 | $40.2M |
| State Street Corp. | 0.00% | Reduce -16.0% | 8,328,817 | $36.9M |
| Braidwell LP | 1.08% | Add +22.6% | 5,440,277 | $24.1M |
| Kynam Capital Management, LP | 1.37% | Add +27.1% | 4,685,563 | $20.8M |
| LSV Asset Management | 0.04% | Reduce -19.2% | 4,081,501 | $18.1M |
| Morgan Stanley | 0.00% | Reduce -6.9% | 4,024,693 | $17.8M |
| Jacobs Levy Equity Management, Inc. | 0.06% | Reduce -15.1% | 3,623,026 | $16.1M |
| Geode Capital Management, LLC | 0.00% | Add +0.4% | 3,306,570 | $14.7M |
| Millennium Management | 0.01% | Add +135.5% | 2,180,443 | $9.7M |
| UBS Group AG | 0.00% | Add +130.2% | 2,179,261 | $9.7M |
| Charles Schwab Investment Management Inc. | 0.00% | Add +4.2% | 1,983,240 | $8.8M |
| Northern Trust Corp. | 0.00% | Add +7.9% | 1,625,110 | $7.2M |
| Deutsche Bank AG | 0.00% | Add +47.4% | 1,567,535 | $6.9M |
| Two Sigma Advisers, LP | 0.01% | Reduce -2.1% | 1,234,000 | $5.5M |
| Jupiter Asset Management Ltd. | 0.05% | Reduce -15.6% | 1,223,275 | $5.4M |
| Point72 Asset Management | 0.01% | New | 1,151,008 | $5.1M |
| JPMorgan Chase & Co. | 0.00% | Add +250.2% | 1,074,506 | $4.8M |
| Acadian Asset Management LLC | 0.01% | Add +29.0% | 1,014,463 | $4.5M |
| Bank of New York Mellon Corp | 0.00% | Add +7.2% | 978,135 | $4.3M |
| Goldman Sachs Group Inc. | 0.00% | Reduce -25.2% | 915,272 | $4.1M |
| Sio Capital Management, LLC | 1.13% | New | 907,783 | $4.0M |
| Two Sigma Investments, LP | 0.01% | Reduce -3.1% | 863,428 | $3.8M |
| Saturn V Capital Management LP | 1.41% | Reduce -27.3% | 814,533 | $3.6M |
| Principal Financial Group Inc. | 0.00% | Add +4.0% | 765,356 | $3.4M |
| Royce & Associates LP | 0.03% | Add +10.9% | 735,436 | $3.3M |
| Bank of America Corp. | 0.00% | Add +61.5% | 678,145 | $3.0M |
| Stonepine Capital Management, LLC | 2.32% | Reduce -35.1% | 648,785 | $2.9M |
| Walleye Capital LLC | 0.03% | Add +107.0% | 580,097 | $2.6M |
| Ameriprise Financial Inc. | 0.00% | Reduce -5.5% | 565,618 | $2.5M |
| Citadel Advisors | 0.00% | Reduce -19.6% | 560,464 | $2.5M |
| Invesco Ltd. | 0.00% | Reduce -1.1% | 521,988 | $2.3M |
| State of Wisconsin Investment Board | 0.01% | Reduce -16.9% | 476,619 | $2.1M |
| Universal- Beteiligungs- und Servicegesellschaft mbH | 0.00% | — | 426,138 | $1.9M |
| Legal & General Group Plc | 0.00% | Add +2.9% | 420,686 | $1.9M |
| Russell Investments Group, Ltd. | 0.00% | Reduce -9.2% | 420,451 | $1.9M |
| Jane Street Group, LLC | 0.00% | Add +29.1% | 417,642 | $1.9M |
| Parkman Healthcare Partners LLC | 0.24% | Reduce -10.3% | 408,535 | $1.8M |
| Nuveen Asset Management, LLC | 0.00% | No change | 405,354 | $1.8M |
| AQR Capital Management | 0.00% | Reduce -29.6% | 396,986 | $1.8M |
| Robeco Institutional Asset Management B.V. | 0.00% | No change | 380,960 | $1.7M |
| Federated Hermes, Inc. | 0.00% | New | 370,476 | $1.6M |
| Barclays PLC | 0.00% | Reduce -11.3% | 369,276 | $1.6M |
| Man Group plc | 0.00% | Reduce -60.3% | 354,824 | $1.6M |
| Public Sector Pension Investment Board | 0.01% | Add +18.0% | 352,106 | $1.6M |
| Rhumbline Advisers | 0.00% | Add +3.0% | 348,006 | $1.5M |
| Connor, Clark & Lunn Investment Management Ltd. | 0.01% | Add +170.4% | 341,455 | $1.5M |
| Los Angeles Capital Management LLC | 0.01% | Add +2625.1% | 331,700 | $1.5M |
| Franklin Resources Inc. | 0.00% | Reduce -1.2% | 309,236 | $1.4M |
| FMR LLC | 0.00% | Add +78.7% | 303,273 | $1.3M |
| Citigroup Inc. | 0.00% | Add +59.0% | 295,961 | $1.3M |
| Wedge Capital Management L L P | 0.02% | Reduce -8.2% | 289,023 | $1.3M |
| AXA S.A. | 0.00% | New | 288,471 | $1.3M |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | 0.00% | Add +6.4% | 286,990 | $1.3M |
| Swiss National Bank | 0.00% | Add +2.2% | 282,700 | $1.3M |
| Qube Research & Technologies Ltd | 0.00% | Reduce -54.9% | 257,730 | $1.1M |
| Schonfeld Strategic Advisors LLC | 0.01% | Add +40.5% | 255,040 | $1.1M |
| Norges Bank | 0.00% | Reduce -36.0% | 252,291 | $1.1M |
| Rafferty Asset Management, LLC | 0.00% | Reduce -40.3% | 236,732 | $1.0M |
| PDT Partners, LLC | 0.09% | Add +720.3% | 223,938 | $992K |
| Dimensional Fund Advisors LP | 0.00% | Add +4.9% | 218,422 | $968K |
| OMERS ADMINISTRATION Corp | 0.01% | Reduce -32.9% | 215,110 | $953K |
| Victory Capital Management Inc. | 0.00% | Reduce -2.2% | 213,292 | $945K |
| Alberta Investment Management Corp | 0.01% | No change | 210,731 | $934K |
| Susquehanna International Group, LLP | 0.00% | Add +135.4% | 192,291 | $852K |
| Hennion & Walsh Asset Management, Inc. | 0.04% | Add +9.9% | 187,773 | $832K |
| Macquarie Group Ltd. | 0.00% | No change | 167,200 | $741K |
| Alliancebernstein L.P. | 0.00% | No change | 163,070 | $722K |
| Vestcor Inc | 0.02% | Reduce -6.8% | 148,614 | $658K |
| Prudential Financial Inc. | 0.00% | Reduce -3.5% | 145,588 | $645K |
| Sei Investments Co. | 0.00% | Reduce -65.4% | 141,915 | $629K |
| California State Teachers Retirement System | 0.00% | Reduce -0.7% | 134,137 | $594K |
| Alps Advisors Inc. | 0.00% | Add +10.1% | 129,397 | $573K |
| CANADA LIFE ASSURANCE Co | 0.00% | Reduce -12.8% | 129,507 | $573K |
| BNP Paribas Financial Markets | 0.00% | Reduce -20.7% | 122,640 | $543K |
| Comerica Bank | 0.00% | Reduce -18.7% | 122,083 | $541K |
| MYDA Advisors LLC | 0.15% | New | 115,200 | $510K |
| Siren, L.L.C. | 0.02% | No change | 110,532 | $490K |
| Thrivent Financial for Lutherans | 0.00% | Reduce -1.4% | 108,850 | $482K |
| Mariner, LLC | 0.00% | Add +134.4% | 105,964 | $469K |
| Creative Planning | 0.00% | Add +145.7% | 103,550 | $459K |
| Cercano Management LLC | 0.01% | No change | 101,378 | $449K |
| Public Employees Retirement System of Ohio | 0.00% | Reduce -8.8% | 100,172 | $444K |
| Harbor Capital Advisors, Inc. | 0.02% | Reduce -40.7% | 99,610 | $441K |
| Virtus Advisers, LLC | 0.18% | Add +78.3% | 98,218 | $435K |
| T. Rowe Price Associates Inc. | 0.00% | Reduce -7.2% | 95,898 | $425K |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | 0.00% | Reduce -3.6% | 89,876 | $398K |
| MetLife Investment Management, LLC | 0.00% | Add +10.6% | 89,255 | $395K |
| Inspire Investing, LLC | 0.04% | Reduce -11.7% | 89,251 | $395K |
| Ensign Peak Advisors, Inc | 0.00% | No change | 85,392 | $378K |
| Voleon Capital Management LP | 0.03% | — | 82,728 | $366K |
| Wells Fargo & Company | 0.00% | Add +27.1% | 82,565 | $366K |
| State of Alaska, Department of Revenue | 0.00% | Reduce -0.0% | 80,212 | $355K |
| STRS Ohio | 0.00% | No change | 76,600 | $339K |
| Corebridge Financial, Inc. | 0.00% | Reduce -7.2% | 75,304 | $334K |
| Verition Fund Management LLC | 0.00% | Add +326.6% | 74,330 | $329K |
"% of holder's portfolio" is IRWD's weight in each manager's 13F, not the share of Ironwood Pharmaceuticals Inc. the manager owns.