Ironwood Pharmaceuticals Inc
IRWD- Exchange
- Nasdaq
- Industry
- Pharmaceutical Preparations
- SEC CIK
- 0001446847
In the last 90 days, Ironwood Pharmaceuticals Inc insiders filed 0 open-market purchases and 1 sale; 212 institutions reported holding it in 13F filings for Q2 2026, worth $675.8M in total; no superinvestor holds it.
13F holders, Q1 2026
Institutional positions in Ironwood Pharmaceuticals Inc as of Mar 31, 2026. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works
- Institutional holders
- 227
- +32 vs. Q4 2025
- Shares held
- 161.5M
- +22.8M (+16.5%) vs. Q4 2025
- Total value
- $566.8M
- +$100.5M (+21.5%) vs. Q4 2025
- New holders
- 57
- 86 more added
- Sold out
- 25
- 56 more reduced
4 institutions that held it in Q4 2025 haven't filed for Q1 2026 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q4 2025: new holders, sold out and not filed yet
Holders and value by quarter
Institutions reporting IRWD on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.
| Quarter | Holders | Value |
|---|---|---|
| Q2 2026 | 212 | $675.8M |
| Q1 2026 | 227 | $566.8M |
| Q4 2025 | 199 | $520.2M |
| Q3 2025 | 166 | $194.9M |
| Q2 2025 | 155 | $104.9M |
| Q1 2025 | 200 | $228.5M |
| Q4 2024 | 223 | $727.5M |
| Q3 2024 | 221 | $673.7M |
| Q2 2024 | 227 | $1.12B |
| Q1 2024 | 261 | $1.50B |
| Q4 2023 | 251 | $1.89B |
| Q3 2023 | 249 | $1.56B |
| Q2 2023 | 252 | $1.77B |
| Q1 2023 | 255 | $1.74B |
| Q4 2022 | 250 | $2.08B |
| Q3 2022 | 245 | $1.76B |
| Q2 2022 | 240 | $2.02B |
| Q1 2022 | 221 | $2.09B |
| Q4 2021 | 212 | $2.00B |
| Q3 2021 | 229 | $2.32B |
| Q2 2021 | 209 | $2.25B |
| Q1 2021 | 210 | $1.91B |
Institutions, Q1 2026
Shares, value and share of portfolio for each institution holding Ironwood Pharmaceuticals Inc; share changes are against Q4 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Armistice Capital, LLC | 15,028,000 | $52.7M | 1.74% | −997,000−6.2% | Reduced |
| BlackRock, Inc. | 13,362,930 | $46.9M | 0.00% | +578,124+4.5% | Added |
| Sarissa Capital Management LP | 9,188,635 | $32.3M | 20.46% | −6,730,800−42.3% | Reduced |
| Bank of America Corp | 8,682,907 | $30.5M | 0.00% | −2,838,753−24.6% | Reduced |
| Renaissance Technologies LLC | 8,061,073 | $28.3M | 0.04% | −143,900−1.8% | Reduced |
| AQR Capital Management LLC | 7,535,080 | $26.4M | 0.01% | +2,811,549+59.5% | Added |
| State Street Corp | 7,456,944 | $26.2M | 0.00% | +3,045,722+69.0% | Added |
| Vanguard Portfolio Management LLC | 6,682,037 | $23.5M | 0.00% | +6,682,037 | New |
| Acadian Asset Management LLC | 6,577,272 | $23.1M | 0.03% | +119,455+1.8% | Added |
| Vanguard Capital Management LLC | 6,097,454 | $21.4M | 0.00% | +6,097,454 | New |
| Two Sigma Investments, LP | 5,848,276 | $20.5M | 0.02% | +2,995,071+105.0% | Added |
| Charles Schwab Investment Management Inc | 4,737,857 | $16.6M | 0.00% | −238,082−4.8% | Reduced |
| Geode Capital Management, LLC | 4,543,522 | $16.0M | 0.00% | +919,988+25.4% | Added |
| Marshall Wace, LLP | 4,525,064 | $15.9M | 0.02% | +101,062+2.3% | Added |
| Jacobs Levy Equity Management, Inc | 3,632,477 | $12.7M | 0.05% | +872,810+31.6% | Added |
| Arrowstreet Capital, Limited Partnership | 3,397,242 | $11.9M | 0.01% | +2,985,181+724.5% | Added |
| Federated Hermes, Inc. | 3,348,806 | $11.8M | 0.02% | +30,669+0.9% | Added |
| Goldman Sachs Group Inc | 2,690,634 | $9.44M | 0.00% | +1,415,319+111.0% | Added |
| Dimensional Fund Advisors LP | 2,082,055 | $7.31M | 0.00% | +1,751,219+529.3% | Added |
| Connor, Clark & Lunn Investment Management Ltd. | 1,835,424 | $6.44M | 0.01% | −155,503−7.8% | Reduced |
| Qube Research & Technologies Ltd | 1,590,081 | $5.58M | 0.01% | −91,148−5.4% | Reduced |
| Susquehanna International Group, LLP | 1,472,157 | $5.17M | 0.01% | +1,023,358+228.0% | Added |
| Northern Trust Corp | 1,265,842 | $4.44M | 0.00% | +32,157+2.6% | Added |
| Hillsdale Investment Management Inc. | 1,236,628 | $4.34M | 0.12% | +80,250+6.9% | Added |
| Pacer Advisors, Inc. | 1,134,512 | $3.98M | 0.01% | +1,134,512 | New |
| Deutsche Bank AG | 1,124,989 | $3.95M | 0.00% | +15,065+1.4% | Added |
| Vanguard Fiduciary Trust Co | 988,630 | $3.47M | 0.00% | +988,630 | New |
| UBS Group AG | 933,225 | $3.28M | 0.00% | +422,682+82.8% | Added |
| Morgan Stanley | 824,819 | $2.90M | 0.00% | +85,134+11.5% | Added |
| FMR LLC | 790,386 | $2.77M | 0.00% | +103,649+15.1% | Added |
| Raymond James Financial Inc | 763,955 | $2.68M | 0.00% | −105,871−12.2% | Reduced |
| Franklin Resources Inc | 744,638 | $2.61M | 0.00% | +359,055+93.1% | Added |
| Ieq Capital, LLC | 742,723 | $2.61M | 0.01% | +109,463+17.3% | Added |
| SEI Investments Co | 742,548 | $2.61M | 0.00% | +68,686+10.2% | Added |
| Victory Capital Management Inc | 713,187 | $2.50M | 0.00% | +695,145+3,852.9% | Added |
| Gsa Capital Partners LLP | 654,445 | $2.30M | 0.14% | +82,832+14.5% | Added |
| Jane Street Group, LLC | 622,247 | $2.18M | 0.00% | −2,197,315−77.9% | Reduced |
| State of Wisconsin Investment Board | 598,159 | $2.10M | 0.00% | +418,119+232.2% | Added |
| Vanguard Global Advisers, LLC | 591,489 | $2.08M | 0.00% | +591,489 | New |
| Mackenzie Financial Corp | 560,034 | $1.97M | 0.00% | +548,490+4,751.3% | Added |
| Integrated Quantitative Investments LLC | 552,104 | $1.94M | 0.35% | +449,450+437.8% | Added |
| Invesco Ltd. | 547,360 | $1.92M | 0.00% | +98,141+21.8% | Added |
| Man Group plc | 540,864 | $1.90M | 0.00% | +493,205+1,034.9% | Added |
| Wedge Capital Management L L P | 540,492 | $1.90M | 0.04% | +540,492 | New |
| CWM Advisors, LLC | 509,941 | $1.79M | 0.10% | +509,941 | New |
| Los Angeles Capital Management LLC | 509,247 | $1.79M | 0.01% | −125,084−19.7% | Reduced |
| Bank of New York Mellon Corp | 484,036 | $1.70M | 0.00% | −26,171−5.1% | Reduced |
| Millennium Management LLC | 457,114 | $1.60M | 0.00% | −103,599−18.5% | Reduced |
| Wellington Management Group LLP | 453,515 | $1.59M | 0.00% | −50,427−10.0% | Reduced |
| Prudential Financial Inc | 449,839 | $1.58M | 0.00% | +308,710+218.7% | Added |
| Bridgeway Capital Management, LLC | 440,493 | $1.55M | 0.03% | −55,500−11.2% | Reduced |
| Range Financial Group LLC | 433,256 | $1.52M | 0.51% | +7,161+1.7% | Added |
| Amundi | 404,237 | $1.42M | 0.00% | −238,593−37.1% | Reduced |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. | 375,288 | $1.32M | 0.00% | +375,288 | New |
| Cerity Partners LLC | 368,370 | $1.29M | 0.00% | +29,858+8.8% | Added |
| CM Management, LLC | 350,000 | $1.23M | 1.03% | +350,000 | New |
| Robeco Institutional Asset Management B.V. | 342,998 | $1.20M | 0.00% | 00.0% | Unchanged |
| LSV Asset Management | 308,271 | $1.08M | 0.00% | +299,223+3,307.1% | Added |
| Toroso Investments, LLC | 304,475 | $1.07M | 0.00% | +304,475 | New |
| Lazard Asset Management LLC | 290,189 | $1.02M | 0.00% | −710,256−71.0% | Reduced |
| CWM, LLC | 278,217 | $976.5K | 0.00% | +45,233+19.4% | Added |
| Segall Bryant & Hamill, LLC | 278,201 | $976.5K | 0.01% | +278,201 | New |
| Russell Investments Group, Ltd. | 261,789 | $915.1K | 0.00% | −3,568−1.3% | Reduced |
| Globeflex Capital L P | 259,809 | $911.9K | 0.14% | +259,809 | New |
| Harvest Investment Services, LLC | 241,881 | $849.0K | 0.16% | +221,711+1,099.2% | Added |
| Winton Group Ltd | 241,746 | $848.5K | 0.03% | +77,411+47.1% | Added |
| Nuveen, LLC | 233,412 | $819.3K | 0.00% | +93,925+67.3% | Added |
| Omers Administration Corp | 226,310 | $794.3K | 0.01% | +11,200+5.2% | Added |
| Walleye Capital LLC | 225,136 | $790.2K | 0.00% | −302,800−57.4% | Reduced |
| Rafferty Asset Management, LLC | 216,623 | $760.3K | 0.00% | +151,782+234.1% | Added |
| Wealth Enhancement Advisory Services, LLC | 226,688 | $740.9K | 0.00% | +71,165+45.8% | Added |
| Mariner, LLC | 207,779 | $729.1K | 0.00% | +93,660+82.1% | Added |
| Martingale Asset Management L P | 204,991 | $719.5K | 0.02% | +204,991 | New |
| Rhumbline Advisers | 192,934 | $677.2K | 0.00% | −6,974−3.5% | Reduced |
| Hennion & Walsh Asset Management, Inc. | 184,485 | $647.5K | 0.02% | −11,547−5.9% | Reduced |
| Vident Advisory, LLC | 184,337 | $647.0K | 0.01% | +184,337 | New |
| Creative Planning | 177,520 | $623.1K | 0.00% | +15,445+9.5% | Added |
| KLP Kapitalforvaltning AS | 174,200 | $611.4K | 0.00% | 00.0% | Unchanged |
| Fifth Third Bancorp | 165,094 | $579.5K | 0.00% | +165,094 | New |
| Alliancebernstein L.P. | 165,790 | $558.7K | 0.00% | −33,730−16.9% | Reduced |
| Legato Capital Management LLC | 156,059 | $547.8K | 0.05% | +156,059 | New |
| Voya Investment Management LLC | 145,819 | $511.8K | 0.00% | +117,060+407.0% | Added |
| Canada Pension Plan Investment Board | 135,000 | $473.9K | 0.00% | −53,000−28.2% | Reduced |
| Quantinno Capital Management LP | 129,703 | $455.3K | 0.00% | +10,810+9.1% | Added |
| O'Shaughnessy Asset Management, LLC | 128,243 | $450.1K | 0.00% | −162,035−55.8% | Reduced |
| State of Wyoming | 128,175 | $449.9K | 0.05% | −29,150−18.5% | Reduced |
| Price T Rowe Associates Inc | 124,314 | $437.0K | 0.00% | +24,951+25.1% | Added |
| Citadel Advisors LLC | 118,276 | $415.1K | 0.00% | −105,693−47.2% | Reduced |
| Mercer Global Advisors Inc | 115,080 | $403.9K | 0.00% | +38,129+49.5% | Added |
| SG Americas Securities, LLC | 113,630 | $399.0K | 0.00% | +55,883+96.8% | Added |
| JPMorgan Chase & Co | 118,191 | $381.8K | 0.00% | −96,416−44.9% | Reduced |
| Cercano Management LLC | 101,378 | $355.8K | 0.02% | 00.0% | Unchanged |
| Ameriprise Financial Inc | 99,341 | $348.7K | 0.00% | −20,628−17.2% | Reduced |
| STRS Ohio | 97,400 | $341.9K | 0.00% | +20,800+27.2% | Added |
| Profund Advisors LLC | 97,281 | $341.5K | 0.01% | +70,798+267.3% | Added |
| Optimist Retirement Group LLC | 94,831 | $332.9K | 0.15% | +34,919+58.3% | Added |
| Fuller & Thaler Asset Management, Inc. | 91,081 | $319.7K | 0.00% | +91,081 | New |
| Barclays PLC | 89,970 | $315.8K | 0.00% | −302,934−77.1% | Reduced |
| Mirae Asset Global ETFs Holdings Ltd. | 90,109 | $312.1K | 0.00% | +12,006+15.4% | Added |
| Allspring Global Investments Holdings, LLC | 79,193 | $308.9K | 0.00% | +79,193 | New |