Institutional Ownership
Ironwood Pharmaceuticals Inc
CUSIP 46333X108COM CL AIRWDQ1 2026
13D / 13G Filings
57
Schedule 13D/13G on record
Beneficial Filers
20
Distinct reporting persons
Largest Stake
17.5%
Max % of class reported
Institutional Holders
219
13F filers (latest quarter)
Beneficial Owners — Schedule 13D / 13G
57 filings · latest Feb 17, 2026
| # | Filed | Reporting Person | Form | % of Class | Shares | Filing |
|---|---|---|---|---|---|---|
| 1 | Feb 17, 2026 | Armistice Capital, LLC | 13G/A | 9.8% | 16.02M | SEC |
| 2 | Nov 14, 2025 | Bank Of America Corp /De/ | 13G | 7.4% | 11.99M | SEC |
| 3 | Nov 12, 2025 | Barclays PLC | 13G/A | 1.9% | 3.17M | SEC |
| 4 | Aug 12, 2025 | Barclays PLC | 13G | 6.9% | 11.13M | SEC |
| 5 | Jul 7, 2025 | The Vanguard Group | 13G/A | 10.0% | 16.20M | SEC |
| 6 | May 15, 2025 | Armistice Capital, LLC | 13G/A | 8.5% | 13.70M | SEC |
| 7 | May 13, 2025 | State Street Corporation | 13G | 2.2% | 3.50M | SEC |
| 8 | May 2, 2025 | Pacer Us Small Cap Cash Cows ETF | 13G/A | 1.1% | 1.79M | SEC |
| 9 | May 2, 2025 | Pacer Us Small Cap Cash Cows ETF | 13G | 7.3% | 11.73M | SEC |
| 10 | Apr 30, 2025 | The Vanguard Group | 13G/A | 9.8% | 15.70M | SEC |
47 more beneficial-ownership filings on Premium
See the full Schedule 13D/13G history for Ironwood Pharmaceuticals Inc.
Unlock full historyTop Institutional Holders (13F)
Largest reported positions · latest quarter
| # | Fund | Shares | Value |
|---|---|---|---|
| 1 | Armistice Capital, LLC | 15.03M | $52.75M |
| 2 | Blackrock, Inc. | 13.36M | $46.90M |
| 3 | Sarissa Capital Management LP | 9.19M | $32.25M |
| 4 | Bank Of America Corp /De/ | 8.68M | $30.48M |
| 5 | Renaissance Technologies LLC | 8.06M | $28.29M |
| 6 | Aqr Capital Management LLC | 7.54M | $26.45M |
| 7 | State Street Corp | 7.46M | $26.17M |
| 8 | Two Sigma Investments, LP | 5.85M | $20.53M |
| 9 | Charles Schwab Investment Management Inc | 4.74M | $16.63M |
| 10 | Geode Capital Management, LLC | 4.54M | $15.95M |