Who Owns IRONWOOD PHARMACEUTICALS INC (IRWD)? -- Institutional Holders (2026-06-30)
254 institutions reported holding $694.5M of IRONWOOD PHARMACEUTICALS INC (IRWD) in SEC 13F filings for 2026-06-30. Largest institutional holders: BlackRock, Inc. ($74.9M), ARMISTICE CAPITAL, LLC ($58.7M), VANGUARD GROUP INC ($57.8M), Sarissa Capital Management LP ($38.7M), STATE STREET CORP ($37.1M). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|
| 1 | BlackRock, Inc. | $74.9M | 17.8M | Added |
| 2 | ARMISTICE CAPITAL, LLC | $58.7M | 13.9M | Trimmed |
| 3 | VANGUARD GROUP INC | $57.8M | 13.7M | Trimmed |
| 4 | Sarissa Capital Management LP | $38.7M | 9.2M | Hold |
| 5 | STATE STREET CORP | $37.1M | 8.8M | Added |
| 6 | BANK OF AMERICA CORP /DE/ | $36.6M | 8.7M | Added |
| 7 | RENAISSANCE TECHNOLOGIES LLC | $33.7M | 8.0M | Trimmed |
| 8 | AQR CAPITAL MANAGEMENT LLC | $27.2M | 6.5M | Trimmed |
| 9 | ACADIAN ASSET MANAGEMENT LLC | $24.6M | 5.9M | Trimmed |
| 10 | GEODE CAPITAL MANAGEMENT, LLC | $20.3M | 4.8M | Added |
| 11 | TWO SIGMA INVESTMENTS, LP | $19.2M | 4.6M | Trimmed |
| 12 | MARSHALL WACE, LLP | $18.1M | 4.3M | Trimmed |
| 13 | JACOBS LEVY EQUITY MANAGEMENT, INC | $17.1M | 4.1M | Added |
| 14 | GOLDMAN SACHS GROUP INC | $14.0M | 3.3M | Added |
| 15 | Sixth Street Partners Management Company, L.P. | $13.9M | 3.3M | New |
| 16 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC | $13.9M | 3.3M | Trimmed |
| 17 | FEDERATED HERMES, INC. | $13.6M | 3.2M | Trimmed |
| 18 | ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | $12.7M | 3.0M | Trimmed |
| 19 | DIMENSIONAL FUND ADVISORS LP | $10.6M | 2.5M | Added |
| 20 | MACKENZIE FINANCIAL CORP | $10.0M | 2.4M | Added |
| 21 | MORGAN STANLEY | $7.8M | 1.9M | Added |
| 22 | Connor, Clark & Lunn Investment Management Ltd. | $7.6M | 1.8M | Trimmed |
| 23 | NORTHERN TRUST CORP | $5.8M | 1.4M | Added |
| 24 | Hillsdale Investment Management Inc. | $5.3M | 1.3M | Added |
| 25 | WELLS FARGO & COMPANY/MN | $5.1M | 1.2M | Added |
Source: SEC Form 13F filings · as of 2026-06-30