Ironwood PharmaceuticalsIRWD
13F holders, Q2 2026 (June 30)212holders −15
23new positions
35sold out
4famous investors
$4.21avg. 13F price*
At the end of Q2 2026, 212 institutions reported holding Ironwood Pharmaceuticals Inc. (IRWD) in their 13F filings, down 15 from Q1 2026. 23 opened new positions and 35 sold out. The largest holders were BlackRock, Inc. ($74.9M), Armistice Capital, LLC ($58.7M) and Sarissa Capital Management LP ($38.7M). 4 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 Ken Griffin (0.0% of Citadel Advisors's portfolio).
- Company
- Ironwood Pharmaceuticals Inc.
- CUSIP
- 46333X108
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q1 2026 → Q2 2026
| Institutions | Total Value | |
|---|---|---|
| New Positions | 23 | $4.7M |
| Exits | 35 | $7.6M |
All 13F filers, Q1 2026 → Q2 2026: 17,003,961 shares bought and 17,652,144 shares sold, net −648,183 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 212 holders
| BlackRock, Inc. | 0.00% | Add +33.1% | 17,788,557 | $74.9M |
| Armistice Capital, LLC | 1.62% | Reduce -7.3% | 13,932,000 | $58.7M |
| Sarissa Capital Management LP | 21.75% | No change | 9,188,635 | $38.7M |
| State Street Corp. | 0.00% | Add +18.1% | 8,809,601 | $37.1M |
| Bank of America Corp. | 0.00% | Add +0.0% | 8,683,803 | $36.6M |
| Renaissance Technologies | 0.05% | Reduce -0.8% | 7,993,226 | $33.7M |
| Vanguard Capital Management LLC | 0.00% | Add +8.4% | 6,608,508 | $27.8M |
| AQR Capital Management | 0.01% | Reduce -14.2% | 6,465,921 | $27.2M |
| Acadian Asset Management LLC | 0.03% | Reduce -11.0% | 5,853,331 | $24.6M |
| Vanguard Portfolio Management LLC | 0.00% | Reduce -17.5% | 5,513,355 | $23.2M |
| Geode Capital Management, LLC | 0.00% | Add +6.3% | 4,831,657 | $20.3M |
| Two Sigma Investments, LP | 0.02% | Reduce -22.1% | 4,556,089 | $19.2M |
| Marshall Wace, LLP | 0.02% | Reduce -5.2% | 4,290,093 | $18.1M |
| Jacobs Levy Equity Management, Inc. | 0.06% | Add +11.9% | 4,065,964 | $17.1M |
| Goldman Sachs Group Inc. | 0.00% | Add +23.2% | 3,313,808 | $14.0M |
| Charles Schwab Investment Management Inc. | 0.00% | Reduce -30.3% | 3,302,242 | $13.9M |
| Federated Hermes, Inc. | 0.02% | Reduce -3.5% | 3,231,238 | $13.6M |
| Arrowstreet Capital, Limited Partnership | 0.01% | Reduce -11.2% | 3,017,089 | $12.7M |
| Dimensional Fund Advisors LP | 0.00% | Add +21.2% | 2,522,891 | $10.6M |
| Mackenzie Financial Corp. | 0.01% | Add +322.7% | 2,367,493 | $10.0M |
| Morgan Stanley | 0.00% | Add +125.5% | 1,859,914 | $7.8M |
| Connor, Clark & Lunn Investment Management Ltd. | 0.01% | Reduce -1.3% | 1,811,714 | $7.6M |
| Northern Trust Corp. | 0.00% | Add +8.5% | 1,373,974 | $5.8M |
| Hillsdale Investment Management Inc. | 0.12% | Add +1.1% | 1,250,428 | $5.3M |
| Wells Fargo & Company | 0.00% | Add +1949.6% | 1,206,198 | $5.1M |
| Deutsche Bank AG | 0.00% | Add +3.0% | 1,158,138 | $4.9M |
| Pacer Advisors, Inc. | 0.01% | Reduce -3.4% | 1,095,513 | $4.6M |
| Vanguard Fiduciary Trust Co. | 0.00% | Add +5.2% | 1,040,335 | $4.4M |
| Franklin Resources Inc. | 0.00% | Add +35.2% | 1,006,979 | $4.2M |
| FMR LLC | 0.00% | Add +15.1% | 909,488 | $3.8M |
| State of Wisconsin Investment Board | 0.01% | Add +30.1% | 778,515 | $3.3M |
| Raymond James Financial Inc. | 0.00% | Reduce -5.1% | 725,085 | $3.1M |
| Victory Capital Management Inc. | 0.00% | Reduce -7.7% | 658,457 | $2.8M |
| Inspire Investing, LLC | 0.11% | Add +23.6% | 630,072 | $2.7M |
| HRT Financial LP | 0.00% | New | 577,337 | $2.4M |
| Ieq Capital, LLC | 0.01% | Reduce -24.4% | 561,588 | $2.4M |
| Vanguard Global Advisers, LLC | 0.00% | Reduce -5.2% | 561,038 | $2.4M |
| Prudential Financial Inc. | 0.00% | Add +19.4% | 537,199 | $2.3M |
| Bank of New York Mellon Corp | 0.00% | Add +5.1% | 508,880 | $2.1M |
| Citadel Advisors | 0.00% | Add +324.8% | 502,403 | $2.1M |
| Voya Investment Management LLC | 0.00% | Add +232.2% | 484,450 | $2.0M |
| Wellington Management Group LLP | 0.00% | Add +3.4% | 468,821 | $2.0M |
| Sei Investments Co. | 0.00% | Reduce -38.1% | 459,417 | $1.9M |
| O'shaughnessy Asset Management, LLC | 0.01% | Add +242.3% | 438,911 | $1.8M |
| Wedge Capital Management L L P | 0.03% | Reduce -19.4% | 435,650 | $1.8M |
| Segall Bryant & Hamill, LLC | 0.02% | Add +46.7% | 408,064 | $1.7M |
| Invesco Ltd. | 0.00% | Reduce -26.3% | 403,209 | $1.7M |
| Man Group plc | 0.00% | Reduce -27.5% | 392,117 | $1.7M |
| Bridgeway Capital Management, LLC | 0.03% | Reduce -11.5% | 389,793 | $1.6M |
| UBS Group AG | 0.00% | Reduce -58.3% | 389,529 | $1.6M |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. | 0.00% | No change | 375,288 | $1.6M |
| Ritholtz Wealth Management | 0.02% | Add +311.4% | 360,094 | $1.5M |
| Nuveen, LLC | 0.00% | Add +52.3% | 355,372 | $1.5M |
| CM Management, LLC | 0.94% | No change | 350,000 | $1.5M |
| Qube Research & Technologies Ltd | 0.00% | Reduce -78.1% | 347,985 | $1.5M |
| Robeco Institutional Asset Management B.V. | 0.00% | No change | 342,998 | $1.4M |
| Los Angeles Capital Management LLC | 0.01% | Reduce -32.8% | 342,293 | $1.4M |
| Virtus Investment Advisers, LLC | 0.31% | Add +318.3% | 318,598 | $1.3M |
| LSV Asset Management | 0.00% | No change | 308,271 | $1.3M |
| CWA Asset Management Group, LLC | 0.04% | New | 290,366 | $1.2M |
| Globeflex Capital L P | 0.14% | No change | 259,809 | $1.1M |
| Gsa Capital Partners LLP | 0.07% | Reduce -60.4% | 259,512 | $1.1M |
| Citigroup Inc. | 0.00% | Add +475.6% | 226,824 | $955K |
| Russell Investments Group, Ltd. | 0.00% | Reduce -14.1% | 224,821 | $946K |
| JPMorgan Chase & Co. | 0.00% | Add +79.9% | 212,575 | $914K |
| Wealth Enhancement Advisory Services, LLC | 0.00% | Reduce -3.2% | 219,445 | $913K |
| Cerity Partners LLC | 0.00% | Reduce -43.5% | 208,019 | $876K |
| Rhumbline Advisers | 0.00% | Add +6.3% | 205,095 | $863K |
| Martingale Asset Management L P | 0.02% | No change | 204,991 | $863K |
| Evolve Private Wealth, LLC | 0.05% | Add +1108.2% | 186,864 | $787K |
| Vident Advisory, LLC | 0.01% | Reduce -1.9% | 180,929 | $762K |
| Creative Planning | 0.00% | Reduce -0.3% | 177,030 | $745K |
| KLP Kapitalforvaltning As | 0.00% | No change | 174,200 | $733K |
| Mariner, LLC | 0.00% | Reduce -18.9% | 168,472 | $709K |
| OMERS ADMINISTRATION Corp | 0.00% | Reduce -29.7% | 159,010 | $669K |
| Rafferty Asset Management, LLC | 0.00% | Reduce -29.4% | 152,878 | $644K |
| Quantinno Capital Management LP | 0.00% | Add +16.1% | 150,604 | $634K |
| Alliancebernstein L.P. | 0.00% | No change | 165,790 | $582K |
| Fifth Third Bancorp | 0.00% | Reduce -19.6% | 132,748 | $559K |
| Canada Pension Plan Investment Board | 0.00% | Reduce -3.0% | 130,900 | $551K |
| Jane Street Group, LLC | 0.00% | Reduce -79.2% | 129,700 | $546K |
| Susquehanna International Group, LLP | 0.00% | Reduce -91.2% | 129,237 | $544K |
| SG Americas Securities, LLC | 0.00% | Add +13.8% | 129,280 | $544K |
| T. Rowe Price Associates Inc. | 0.00% | Add +3.6% | 128,772 | $543K |
| HSBC Holdings PLC | 0.00% | Add +324.5% | 126,100 | $542K |
| Arax Advisory Partners | 0.00% | Add +7355.4% | 126,966 | $535K |
| Mercer Global Advisors Inc. | 0.00% | Add +9.6% | 126,160 | $531K |
| D. E. Shaw & Co. | 0.00% | Add +156.4% | 122,907 | $517K |
| Optimist Retirement Group LLC | 0.17% | Add +7.6% | 102,054 | $430K |
| State of Wyoming | 0.04% | Reduce -20.6% | 101,781 | $428K |
| Cercano Management LLC | 0.06% | No change | 101,378 | $427K |
| Barclays PLC | 0.00% | Add +11.3% | 100,123 | $422K |
| Ameriprise Financial Inc. | 0.00% | Add +0.2% | 99,526 | $419K |
| Engineers Gate Manager LP | 0.01% | Add +22.8% | 98,052 | $413K |
| MetLife Investment Management, LLC | 0.00% | Add +50.9% | 96,208 | $405K |
| Integrated Quantitative Investments LLC | 0.06% | Reduce -83.0% | 93,689 | $394K |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | 0.00% | Add +3.4% | 93,191 | $394K |
| Fuller & Thaler Asset Management, Inc. | 0.00% | Reduce -0.8% | 90,321 | $380K |
| WINTON GROUP Ltd | 0.01% | Reduce -65.2% | 84,156 | $354K |
| Allspring Global Investments Holdings, LLC | 0.00% | Add +3.9% | 82,315 | $339K |
"% of holder's portfolio" is IRWD's weight in each manager's 13F, not the share of Ironwood Pharmaceuticals Inc. the manager owns.