IRWD IRONWOOD PHARMACEUTICALS INC: institutional ownership and insider trading
228 funds reported holding $734M of IRONWOOD PHARMACEUTICALS INC in their latest 13F filings; in Q2 2026 funds net sold $49.5M, with 23 new positions and 36 funds selling out; over the last 12 months insiders bought $0 and sold $22.6M on the open market.
Famous investors holding IRWD
- Renaissance Technologies (Renaissance Technologies): $33.7M, 0.1% of the portfolio
- Two Sigma (Two Sigma Investments): $19.2M, 0.0% of the portfolio
- Ken Griffin (Citadel Advisors): $2.85M, 0.0% of the portfolio
- D. E. Shaw (D. E. Shaw & Co.): $517K, 0.0% of the portfolio
Largest institutional holders of IRWD
- BlackRock, Inc. (BLK) — $74.9M
- ARMISTICE CAPITAL, LLC — $58.7M
- VANGUARD GROUP INC — $53.8M
- Sarissa Capital Management LP — $38.7M
- STATE STREET CORP (STT, STT-PG) — $37.1M
- BANK OF AMERICA CORP /DE/ (BAC, BAC-PB, BAC-PE, BAC-PK, BAC-PL, BAC-PM, BAC-PN, BAC-PO, BAC-PP, BML-PG, BML-PH, BML-PJ, BML-PL) — $36.6M
- RENAISSANCE TECHNOLOGIES LLC — $33.7M
- VANGUARD CAPITAL MANAGEMENT LLC — $27.8M
- AQR CAPITAL MANAGEMENT LLC — $27.2M
- ACADIAN ASSET MANAGEMENT LLC — $24.6M
Recent IRWD insider trades
- Jul 7, 2026: Silver Ronald sold 127,890 shares ($578K)
- Jun 16, 2026: McHugh Julie sold 21,571 shares ($80.5K)
- Mar 17, 2026: Denner Alexander J sold 6,730,800 shares ($20.5M)
- Feb 24, 2026: Silver Ronald sold 24,173 shares ($90.2K)
5%+ owners
- Armistice Capital, LLC: 8.4% (Schedule 13G/A, filed Aug 14, 2026)
- BlackRock, Inc.: 8.1% (Schedule 13G/A, filed Jul 28, 2026)
- BANK OF AMERICA CORP /DE/: 6.1% (Schedule 13G/A, filed Apr 27, 2026)
- Alexander J. Denner: 5.8% (Schedule 13D/A, filed Mar 19, 2026)
- STATE STREET CORPORATION: 5.4% (Schedule 13G, filed Aug 7, 2026)