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, Q4 2025
Institutional positions in Ironwood Pharmaceuticals Inc as of Dec 31, 2025. 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
- 199
- +38 vs. Q3 2025
- Shares held
- 154.6M
- +6.08M (+4.1%) vs. Q3 2025
- Total value
- $520.2M
- +$325.4M (+167.1%) vs. Q3 2025
- New holders
- 56
- 64 more added
- Sold out
- 18
- 47 more reduced
5 institutions that held it in Q3 2025 haven't filed for Q4 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q3 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, Q4 2025
Shares, value and share of portfolio for each institution holding Ironwood Pharmaceuticals Inc; share changes are against Q3 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Armistice Capital, LLC | 16,025,000 | $54.0M | 1.32% | −125,000−0.8% | Reduced |
| Vanguard Group Inc | 15,958,196 | $53.8M | 0.00% | −113,810−0.7% | Reduced |
| Sarissa Capital Management LP | 15,919,435 | $53.6M | 24.07% | 00.0% | Unchanged |
| BlackRock, Inc. | 12,784,806 | $43.1M | 0.00% | +722,248+6.0% | Added |
| Bank of America Corp | 11,521,660 | $38.8M | 0.00% | −173,884−1.5% | Reduced |
| Renaissance Technologies LLC | 8,204,973 | $27.7M | 0.04% | −147,200−1.8% | Reduced |
| Acadian Asset Management LLC | 6,457,817 | $21.7M | 0.04% | −44,676−0.7% | Reduced |
| Charles Schwab Investment Management Inc | 4,975,939 | $16.8M | 0.00% | +58,603+1.2% | Added |
| AQR Capital Management LLC | 4,723,531 | $15.9M | 0.01% | −655,004−12.2% | Reduced |
| Marshall Wace, LLP | 4,424,002 | $14.9M | 0.01% | +1,279,863+40.7% | Added |
| State Street Corp | 4,411,222 | $14.9M | 0.00% | +1,254,915+39.8% | Added |
| Geode Capital Management, LLC | 3,623,534 | $12.2M | 0.00% | +8,547+0.2% | Added |
| Federated Hermes, Inc. | 3,318,137 | $11.2M | 0.02% | +1,161,033+53.8% | Added |
| Two Sigma Advisers, LP | 3,140,100 | $10.6M | 0.02% | −176,400−5.3% | Reduced |
| Two Sigma Investments, LP | 2,853,205 | $9.62M | 0.01% | +318,694+12.6% | Added |
| Jane Street Group, LLC | 2,819,562 | $9.50M | 0.01% | +498,467+21.5% | Added |
| Jacobs Levy Equity Management, Inc | 2,759,667 | $9.30M | 0.04% | +839,137+43.7% | Added |
| Connor, Clark & Lunn Investment Management Ltd. | 1,990,927 | $6.71M | 0.02% | −170,891−7.9% | Reduced |
| Qube Research & Technologies Ltd | 1,681,229 | $5.67M | 0.01% | −1,125,681−40.1% | Reduced |
| Goldman Sachs Group Inc | 1,275,315 | $4.30M | 0.00% | +190,948+17.6% | Added |
| Northern Trust Corp | 1,233,685 | $4.16M | 0.00% | −107,221−8.0% | Reduced |
| Hillsdale Investment Management Inc. | 1,156,378 | $3.90M | 0.11% | +1,156,378 | New |
| Deutsche Bank AG | 1,109,924 | $3.74M | 0.00% | −417,305−27.3% | Reduced |
| Lazard Asset Management LLC | 1,000,445 | $3.37M | 0.01% | +1,000,445 | New |
| Raymond James Financial Inc | 869,826 | $2.93M | 0.00% | +854,780+5,681.1% | Added |
| Morgan Stanley | 739,685 | $2.49M | 0.00% | +262,585+55.0% | Added |
| FMR LLC | 686,737 | $2.31M | 0.00% | +126,791+22.6% | Added |
| Diadema Partners LP | 683,611 | $2.30M | 1.37% | +683,611 | New |
| SEI Investments Co | 673,862 | $2.27M | 0.00% | −9,742−1.4% | Reduced |
| Exome Asset Management LLC | 648,532 | $2.19M | 1.08% | +648,532 | New |
| Amundi | 642,830 | $2.17M | 0.00% | +642,830 | New |
| Ieq Capital, LLC | 633,260 | $2.13M | 0.01% | −28,438−4.3% | Reduced |
| Gsa Capital Partners LLP | 571,613 | $1.93M | 0.17% | +262,084+84.7% | Added |
| Millennium Management LLC | 560,713 | $1.89M | 0.00% | +310,594+124.2% | Added |
| Walleye Capital LLC | 527,936 | $1.78M | 0.01% | +527,936 | New |
| UBS Group AG | 510,543 | $1.72M | 0.00% | −301,121−37.1% | Reduced |
| Bank of New York Mellon Corp | 510,207 | $1.72M | 0.00% | +7,129+1.4% | Added |
| Wellington Management Group LLP | 503,942 | $1.70M | 0.00% | +503,942 | New |
| Bridgeway Capital Management, LLC | 495,993 | $1.67M | 0.04% | +345,993+230.7% | Added |
| Invesco Ltd. | 449,219 | $1.51M | 0.00% | +82,687+22.6% | Added |
| Susquehanna International Group, LLP | 448,799 | $1.51M | 0.00% | +351,933+363.3% | Added |
| Range Financial Group LLC | 426,095 | $1.44M | 0.50% | +426,095 | New |
| Arrowstreet Capital, Limited Partnership | 412,061 | $1.39M | 0.00% | +412,061 | New |
| Barclays PLC | 392,904 | $1.32M | 0.00% | +95,586+32.1% | Added |
| Franklin Resources Inc | 385,583 | $1.30M | 0.00% | +362,332+1,558.4% | Added |
| Robeco Institutional Asset Management B.V. | 342,998 | $1.16M | 0.00% | 00.0% | Unchanged |
| Cerity Partners LLC | 338,512 | $1.14M | 0.00% | −536−0.2% | Reduced |
| Dimensional Fund Advisors LP | 330,836 | $1.11M | 0.00% | +240,463+266.1% | Added |
| O'Shaughnessy Asset Management, LLC | 290,278 | $978.2K | 0.01% | +290,278 | New |
| Los Angeles Capital Management LLC | 634,331 | $951.5K | 0.00% | −495,721−43.9% | Reduced |
| Russell Investments Group, Ltd. | 265,357 | $893.7K | 0.00% | −61,210−18.7% | Reduced |
| CWM, LLC | 232,984 | $785.0K | 0.00% | +194+0.1% | Added |
| Citadel Advisors LLC | 223,969 | $754.8K | 0.00% | −420,077−65.2% | Reduced |
| Omers Administration Corp | 215,110 | $724.9K | 0.01% | 00.0% | Unchanged |
| JPMorgan Chase & Co | 214,607 | $723.2K | 0.00% | +102,450+91.3% | Added |
| Rhumbline Advisers | 199,908 | $673.7K | 0.00% | −23,321−10.4% | Reduced |
| Alliancebernstein L.P. | 199,520 | $672.4K | 0.00% | 00.0% | Unchanged |
| Wealth Enhancement Advisory Services, LLC | 155,523 | $664.9K | 0.00% | +1,135+0.7% | Added |
| Hennion & Walsh Asset Management, Inc. | 196,032 | $660.6K | 0.02% | +26,539+15.7% | Added |
| Canada Pension Plan Investment Board | 188,000 | $633.6K | 0.00% | +188,000 | New |
| Persistent Asset Partners Ltd | 182,046 | $613.5K | 0.29% | +182,046 | New |
| State of Wisconsin Investment Board | 180,040 | $606.7K | 0.00% | +180,040 | New |
| Wells Fargo & Company | 176,582 | $595.1K | 0.00% | +75,330+74.4% | Added |
| KLP Kapitalforvaltning AS | 174,200 | $587.1K | 0.00% | 00.0% | Unchanged |
| Winton Group Ltd | 164,335 | $553.8K | 0.02% | +164,335 | New |
| Creative Planning | 162,075 | $546.2K | 0.00% | +71,919+79.8% | Added |
| State of Wyoming | 157,325 | $530.2K | 0.06% | −205,082−56.6% | Reduced |
| Prudential Financial Inc | 141,129 | $475.6K | 0.00% | +91,194+182.6% | Added |
| Nuveen, LLC | 139,487 | $470.1K | 0.00% | +139,487 | New |
| Prelude Capital Management, LLC | 136,507 | $460.0K | 0.03% | +136,507 | New |
| Ameriprise Financial Inc | 119,969 | $404.3K | 0.00% | 00.0% | Unchanged |
| Quantinno Capital Management LP | 118,893 | $400.7K | 0.00% | +118,893 | New |
| D. E. Shaw & Co., Inc. | 117,446 | $395.8K | 0.00% | −254,824−68.5% | Reduced |
| Mariner, LLC | 114,119 | $384.2K | 0.00% | +12,806+12.6% | Added |
| Integrated Quantitative Investments LLC | 102,654 | $345.9K | 0.07% | +102,654 | New |
| Cercano Management LLC | 101,378 | $341.6K | 0.01% | 00.0% | Unchanged |
| Price T Rowe Associates Inc | 99,363 | $335.0K | 0.00% | +19,185+23.9% | Added |
| Squarepoint Ops LLC | 88,880 | $299.5K | 0.00% | +68,613+338.5% | Added |
| Pallas Capital Advisors LLC | 87,975 | $296.5K | 0.01% | +406+0.5% | Added |
| MetLife Investment Management | 87,521 | $294.9K | 0.00% | +29,512+50.9% | Added |
| Universal- Beteiligungs- und Servicegesellschaft mbH | 79,013 | $266.3K | 0.00% | −45,862−36.7% | Reduced |
| Mirae Asset Global ETFs Holdings Ltd. | 78,103 | $263.1K | 0.00% | +5,132+7.0% | Added |
| Mercer Global Advisors Inc | 76,951 | $259.3K | 0.00% | +5,598+7.8% | Added |
| STRS Ohio | 76,600 | $258.1K | 0.00% | 00.0% | Unchanged |
| Exchange Traded Concepts, LLC | 76,554 | $258.0K | 0.00% | −119,178−60.9% | Reduced |
| SmartHarvest Portfolios, LLC | 75,585 | $254.7K | 0.09% | +75,585 | New |
| JustInvest LLC | 74,839 | $252.2K | 0.00% | +2,133+2.9% | Added |
| Virtus Investment Advisers, Inc. | 74,311 | $250.4K | 0.07% | +74,311 | New |
| Intech Investment Management LLC | 71,573 | $241.2K | 0.00% | −621−0.9% | Reduced |
| CIBC World Markets Inc. | 71,331 | $240.4K | 0.00% | +71,331 | New |
| Public Employees Retirement System of Ohio | 67,888 | $228.8K | 0.00% | +7,120+11.7% | Added |
| Scotia Capital Inc. | 67,183 | $226.4K | 0.00% | +67,183 | New |
| EntryPoint Capital, LLC | 66,625 | $224.5K | 0.09% | +66,625 | New |
| Balyasny Asset Management LLC | 65,156 | $219.6K | 0.00% | +65,156 | New |
| Rafferty Asset Management, LLC | 64,841 | $218.5K | 0.00% | +64,841 | New |
| Captrust Financial Advisors | 63,822 | $215.1K | 0.00% | +668+1.1% | Added |
| Wedbush Securities Inc | 63,733 | $215.0K | 0.01% | +63,733 | New |
| Optimist Retirement Group LLC | 59,912 | $201.9K | 0.09% | +59,912 | New |
| Buckingham Strategic Partners | 59,617 | $200.9K | 0.00% | +7,322+14.0% | Added |
| Virtus ETF Advisers LLC | 58,000 | $195.5K | 0.09% | +58,000 | New |