Ironwood PharmaceuticalsIRWD
13F holders, Q2 2025 (June 30)155holders −45
18new positions
64sold out
7famous investors
$0.72avg. 13F price*
At the end of Q2 2025, 155 institutions reported holding Ironwood Pharmaceuticals Inc. (IRWD) in their 13F filings, down 45 from Q1 2025. 18 opened new positions and 64 sold out. The largest holders were Vanguard Group Inc. ($11.6M), Armistice Capital, LLC ($11.6M) and Sarissa Capital Management LP ($11.4M). 7 famous investors held it, including Jim Simons / Peter Brown (0.0% of Renaissance Technologies's portfolio), Cliff Asness (0.0% of AQR Capital Management's portfolio) and David E. Shaw (0.0% of D. E. Shaw & Co.'s portfolio).
- Company
- Ironwood Pharmaceuticals Inc.
- CUSIP
- 46333X108
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q1 2025 → Q2 2025
| Institutions | Total Value | |
|---|---|---|
| New Positions | 18 | $587K |
| Exits | 64 | $26.8M |
All 13F filers, Q1 2025 → Q2 2025: 28,657,141 shares bought and 37,934,489 shares sold, net −9,277,348 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 155 holders
| Vanguard Group Inc. | 0.00% | Add +3.2% | 16,202,129 | $11.6M |
| Armistice Capital, LLC | 0.44% | Add +17.9% | 16,150,000 | $11.6M |
| Sarissa Capital Management LP | 7.40% | Reduce -2.9% | 15,919,435 | $11.4M |
| BlackRock, Inc. | 0.00% | Add +1.2% | 12,022,998 | $8.6M |
| Renaissance Technologies | 0.01% | Reduce -15.4% | 8,406,169 | $6.0M |
| Acadian Asset Management LLC | 0.01% | Add +147.6% | 6,549,687 | $4.7M |
| AQR Capital Management | 0.00% | Add +144.3% | 6,165,637 | $4.4M |
| Kynam Capital Management, LP | 0.42% | Reduce -6.1% | 5,466,825 | $3.9M |
| Marshall Wace, LLP | 0.00% | Add +616.3% | 3,993,557 | $2.9M |
| Charles Schwab Investment Management Inc. | 0.00% | Add +38.4% | 3,664,276 | $2.6M |
| Geode Capital Management, LLC | 0.00% | Add +2.4% | 3,499,332 | $2.5M |
| Two Sigma Advisers, LP | 0.01% | Add +79.6% | 3,384,100 | $2.4M |
| Bank of America Corp. | 0.00% | Add +135.1% | 3,357,872 | $2.4M |
| Qube Research & Technologies Ltd | 0.00% | Add +1.3% | 3,351,002 | $2.4M |
| State Street Corp. | 0.00% | Reduce -11.2% | 3,107,719 | $2.2M |
| Two Sigma Investments, LP | 0.00% | Add +124.1% | 2,750,573 | $2.0M |
| LSV Asset Management | 0.00% | Reduce -31.2% | 2,750,200 | $2.0M |
| Connor, Clark & Lunn Investment Management Ltd. | 0.01% | Add +48.3% | 2,206,948 | $1.6M |
| Federated Hermes, Inc. | 0.00% | Add +66.8% | 2,177,038 | $1.6M |
| Jane Street Group, LLC | 0.00% | Reduce -50.3% | 1,745,122 | $1.3M |
| D. E. Shaw & Co. | 0.00% | Add +1421.7% | 1,669,639 | $1.2M |
| Deutsche Bank AG | 0.00% | Reduce -2.0% | 1,523,337 | $1.1M |
| Jacobs Levy Equity Management, Inc. | 0.00% | Reduce -6.7% | 1,475,046 | $1.1M |
| Goldman Sachs Group Inc. | 0.00% | Reduce -8.3% | 1,444,730 | $1.0M |
| Northern Trust Corp. | 0.00% | Reduce -7.2% | 1,305,265 | $936K |
| Los Angeles Capital Management LLC | 0.00% | Add +76.1% | 1,211,155 | $869K |
| Amundi | 0.00% | Add +979.6% | 755,536 | $559K |
| Gsa Capital Partners LLP | 0.04% | Add +37.4% | 720,860 | $517K |
| Sei Investments Co. | 0.00% | Add +266.1% | 683,604 | $490K |
| Inspire Investing, LLC | 0.04% | Add +138.3% | 552,420 | $396K |
| Universal- Beteiligungs- und Servicegesellschaft mbH | 0.00% | Add +26.0% | 526,775 | $378K |
| Graham Capital Management, L.P. | 0.01% | Add +157.1% | 523,378 | $375K |
| Royce & Associates LP | 0.00% | Reduce -31.2% | 506,060 | $363K |
| FMR LLC | 0.00% | Add +3.6% | 497,202 | $357K |
| Morgan Stanley | 0.00% | Reduce -73.5% | 494,034 | $354K |
| Ieq Capital, LLC | 0.00% | Add +164.8% | 491,882 | $353K |
| Bank of New York Mellon Corp | 0.00% | Reduce -2.5% | 487,182 | $349K |
| Robeco Institutional Asset Management B.V. | 0.00% | Reduce -2.8% | 370,334 | $266K |
| Barclays PLC | 0.00% | Add +10.9% | 365,450 | $262K |
| Exchange Traded Concepts, LLC | 0.00% | Add +91.3% | 341,534 | $245K |
| Cerity Partners LLC | 0.00% | Add +252.1% | 339,689 | $244K |
| Invesco Ltd. | 0.00% | Add +17.0% | 322,147 | $231K |
| Tidal Investments LLC | 0.00% | New | 310,079 | $222K |
| Citadel Advisors | 0.00% | Reduce -67.1% | 309,272 | $222K |
| UBS Group AG | 0.00% | Add +141.5% | 300,110 | $215K |
| Susquehanna International Group, LLP | 0.00% | Reduce -59.0% | 265,959 | $191K |
| Man Group plc | 0.00% | Reduce -29.8% | 234,257 | $168K |
| Rhumbline Advisers | 0.00% | Add +3.6% | 215,618 | $155K |
| OMERS ADMINISTRATION Corp | 0.00% | No change | 215,110 | $154K |
| Russell Investments Group, Ltd. | 0.00% | Reduce -4.2% | 208,861 | $150K |
| State of Wyoming | 0.02% | Add +249.9% | 205,644 | $147K |
| Alliancebernstein L.P. | 0.00% | Add +30.8% | 199,520 | $143K |
| Principal Financial Group Inc. | 0.00% | Add +104.7% | 189,064 | $136K |
| Cwm, LLC | 0.00% | Add +220.7% | 182,774 | $131K |
| KLP Kapitalforvaltning As | 0.00% | Reduce -12.2% | 174,200 | $125K |
| Hennion & Walsh Asset Management, Inc. | 0.01% | Reduce -4.4% | 172,579 | $124K |
| T. Rowe Price Associates Inc. | 0.00% | Add +0.7% | 172,521 | $123K |
| Mariner, LLC | 0.00% | Reduce -78.5% | 161,574 | $116K |
| Macquarie Group Ltd. | 0.00% | Reduce -19.6% | 136,200 | $98K |
| Wealth Enhancement Advisory Services, LLC | 0.00% | Add +425.2% | 125,460 | $96K |
| Algert Global LLC | 0.00% | New | 122,580 | $88K |
| JPMorgan Chase & Co. | 0.00% | Reduce -93.3% | 113,284 | $81K |
| Siren, L.L.C. | 0.00% | No change | 110,532 | $80K |
| Cercano Management LLC | 0.00% | No change | 101,378 | $73K |
| Millennium Management | 0.00% | Reduce -98.5% | 96,332 | $69K |
| Creative Planning | 0.00% | Add +10.7% | 93,680 | $67K |
| Dimensional Fund Advisors LP | 0.00% | Reduce -0.0% | 90,373 | $65K |
| Intech Investment Management LLC | 0.00% | No change | 87,787 | $63K |
| Wells Fargo & Company | 0.00% | Add +3.9% | 87,496 | $63K |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | 0.00% | Add +4.0% | 87,435 | $63K |
| Squarepoint Ops LLC | 0.00% | New | 79,867 | $57K |
| Pallas Capital Advisors LLC | 0.00% | Add +454.5% | 79,512 | $57K |
| Tudor Investment Corporation | 0.00% | Reduce -2.9% | 79,455 | $57K |
| STRS Ohio | 0.00% | No change | 76,600 | $55K |
| Bridgeway Capital Management, LLC | 0.00% | Add +141.9% | 75,000 | $54K |
| Engineers Gate Manager LP | 0.00% | Add +369.2% | 73,354 | $53K |
| Citigroup Inc. | 0.00% | Reduce -40.0% | 66,136 | $47K |
| Vanguard Personalized Indexing Management, LLC | 0.00% | New | 50,677 | $36K |
| Ameriprise Financial Inc. | 0.00% | Reduce -3.0% | 48,127 | $35K |
| Panagora Asset Management Inc. | 0.00% | No change | 46,569 | $33K |
| Voya Investment Management LLC | 0.00% | Add +15.3% | 46,075 | $33K |
| Captrust Financial Advisors | 0.00% | New | 44,447 | $32K |
| State Board of Administration of Florida Retirement System | 0.00% | Reduce -84.8% | 44,394 | $32K |
| New York State Common Retirement Fund | 0.00% | No change | 41,869 | $30K |
| Merit Financial Group, LLC | 0.00% | Add +171.8% | 41,647 | $30K |
| GRIMES & Co WEALTH MANAGEMENT, LLC | 0.00% | No change | 40,994 | $29K |
| Focus Partners Advisor Solutions, LLC | 0.00% | Add +284.6% | 39,743 | $29K |
| Teachers Retirement System of the State of Kentucky | 0.00% | No change | 39,600 | $28K |
| ProShare Advisors LLC | 0.00% | Add +2.7% | 38,852 | $28K |
| R Squared Ltd | 0.02% | Add +286.5% | 38,765 | $28K |
| Capstone Investment Advisors, LLC | 0.00% | Reduce -9.3% | 36,268 | $26K |
| OVERSEA-CHINESE BANKING Corp Ltd | 0.00% | New | 35,016 | $25K |
| Focus Partners Wealth | 0.00% | New | 34,547 | $25K |
| Mercer Global Advisors Inc. | 0.00% | New | 33,415 | $24K |
| China Universal Asset Management Co., Ltd. | 0.00% | Add +1.3% | 32,501 | $23K |
| Dynamic Technology Lab Private Ltd | 0.00% | Reduce -18.4% | 31,500 | $23K |
| Neuberger Berman Group LLC | 0.00% | Add +178.4% | 30,534 | $22K |
| Brighton Jones LLC | 0.00% | New | 30,425 | $22K |
| Police & Firemen's Retirement System of New Jersey | 0.00% | No change | 29,313 | $21K |
| Jain Global LLC | 0.00% | Reduce -65.2% | 28,869 | $21K |
| Tower Research Capital LLC (TRC) | 0.00% | Add +261.4% | 28,002 | $20K |
| Shell Asset Management Co. | 0.00% | No change | 26,689 | $19K |
| Prairiewood Capital, LLC | 0.01% | Reduce -26.8% | 24,691 | $18K |
| Franklin Resources Inc. | 0.00% | Reduce -92.4% | 23,251 | $17K |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | 0.00% | Reduce -92.5% | 21,643 | $16K |
| Prudential Financial Inc. | 0.00% | Add +75.2% | 20,635 | $15K |
| Cibc World Markets Corp. | 0.00% | Reduce -37.2% | 19,714 | $14K |
| Ariadne Wealth Management, LP | 0.01% | New | 12,889 | $14K |
| BNP Paribas Financial Markets | 0.00% | Reduce -95.0% | 18,737 | $13K |
| Victory Capital Management Inc. | 0.00% | Reduce -0.5% | 18,619 | $13K |
| Legal & General Group Plc | 0.00% | Reduce -92.7% | 18,359 | $13K |
| Broderick Brian C | 0.00% | Reduce -45.5% | 18,000 | $13K |
| Balyasny Asset Management L.P. | 0.00% | Reduce -94.3% | 17,743 | $13K |
| Integrated Wealth Concepts LLC | 0.00% | New | 15,889 | $11K |
| Raymond James Financial Inc. | 0.00% | No change | 15,295 | $11K |
| HighTower Advisors, LLC | 0.00% | New | 15,000 | $11K |
| First Affirmative Financial Network | 0.01% | Add +34.8% | 14,930 | $11K |
| Essential Partners LLC | 0.00% | — | 14,459 | $10K |
| Ameritas Investment Partners, Inc. | 0.00% | No change | 13,773 | $10K |
| Public Employees Retirement System of Ohio | 0.00% | Add +135.3% | 13,469 | $10K |
| Catalyst Funds Management Pty Ltd | 0.00% | Reduce -96.2% | 13,340 | $10K |
| Farallon Capital Management, L.L.C. | 0.00% | No change | 13,000 | $9K |
| Diversified Trust Co. | 0.00% | No change | 12,574 | $9K |
| Xponance LLC | 0.00% | Add +7.4% | 12,339 | $9K |
| HSBC Holdings PLC | 0.00% | Reduce -40.6% | 12,351 | $9K |
| EverSource Wealth Advisors, LLC | 0.00% | Add +1799.0% | 12,021 | $9K |
| NorthCrest Asset Manangement, LLC | 0.00% | New | 11,121 | $9K |
| Royal Bank of Canada | 0.00% | Reduce -73.9% | 10,226 | $8K |
| Mackenzie Financial Corp. | 0.00% | No change | 10,460 | $8K |
| US Bancorp \de | 0.00% | Reduce -9.0% | 10,383 | $7K |
| California State Teachers Retirement System | 0.00% | Reduce -92.4% | 10,251 | $7K |
| Fisher Asset Management | 0.00% | New | 10,000 | $7K |
| EMC Capital Management | 0.00% | Reduce -58.7% | 9,866 | $7K |
| Mirae Asset Global Investments Co., Ltd. | 0.00% | Add +13.7% | 6,251 | $4K |
| Amalgamated Bank | 0.00% | No change | 4,677 | $3K |
| GF Fund Management Co. LTD. | 0.00% | No change | 3,971 | $3K |
| IFP Advisors, Inc | 0.00% | Add +697.7% | 3,406 | $2K |
| Nisa Investment Advisors, LLC | 0.00% | Reduce -15.2% | 2,051 | $1K |
| WealthCollab, LLC | 0.00% | New | 1,970 | $1K |
| Physician Wealth Advisors, Inc. | 0.00% | New | 1,669 | $1K |
| Clearstead Advisors, LLC | 0.00% | New | 1,515 | $1K |
| True Wealth Design, LLC | 0.00% | Add +741.3% | 1,018 | $731 |
| Sterling Capital Management LLC | 0.00% | Reduce -59.4% | 702 | $503 |
| Allworth Financial LP | 0.00% | New | 269 | $193 |
| Optiver Holding B.V. | 0.00% | No change | 164 | $118 |
| Clean Yield Group | 0.00% | No change | 85 | $61 |
| SBI Securities Co., Ltd. | 0.00% | Add +11.1% | 70 | $50 |
| Bell Investment Advisors, Inc | 0.00% | No change | 48 | $35 |
| Blue Trust, Inc. | 0.00% | No change | 34 | $24 |
| Osaic Holdings, Inc. | 0.00% | Reduce -97.1% | 23 | $17 |
| Steward Partners Investment Advisory, LLC | 0.00% | No change | 17 | $12 |
| National Bank of Canada | 0.00% | No change | 1 | $1 |
| Daiwa Securities Group Inc. | 0.00% | No change | 573 | $0 |
| Simplex Trading, LLC | 0.00% | Reduce -68.7% | 776 | $0 |
| Covestor Ltd | 0.00% | Add +452.9% | 94 | $0 |
"% of holder's portfolio" is IRWD's weight in each manager's 13F, not the share of Ironwood Pharmaceuticals Inc. the manager owns.