IRWD · Insider trading · 13F holders · Congress trades
Ironwood Pharmaceuticals Inc (IRWD)
Who is buying and selling IRWD: company insiders on SEC Form 4, hedge funds and superinvestors on Form 13F, and members of Congress under the STOCK Act. Every figure links to the filing or page it comes from.
- 13F filers holding
- 3
- Insider buys, 90 days
- $0
- Insider sales, 90 days
- $0
- Congress trades, 12 months
- 0
IRWD at a glance
- No open-market insider purchases or sales of IRWD were filed in the last 90 days.
- 3 13F filers hold IRWD among their 50 largest positions, worth $98.8M combined. The biggest bets by portfolio weight are Sarissa Capital Management LP (21.7%), Armistice Capital, LLC (1.6%) and CM Management, LLC (0.9%).
- No member of Congress has disclosed a trade in IRWD.
IRWD insider trading
No open-market insider purchases or sales of IRWD were filed in the last 90 days.
Who owns IRWD? Hedge funds and superinvestors
3 13F filers hold IRWD among their 50 largest positions, worth $98.8M combined. The biggest bets by portfolio weight are Sarissa Capital Management LP (21.7%), Armistice Capital, LLC (1.6%) and CM Management, LLC (0.9%).
| Manager | % of portfolio | Value | Shares | Last quarter | 13F |
|---|---|---|---|---|---|
| Armistice Capital, LLCHedge fund | 1.6% | $58.7M | 13,932,000 | -7.3% shares | Q2 2026 |
| Sarissa Capital Management LPHedge fund | 21.7% | $38.7M | 9,188,635 | +0.0% shares | Q2 2026 |
| CM Management, LLCHedge fund | 0.9% | $1.5M | 350,000 | +0.0% shares | Q2 2026 |
Each manager counts with its latest 13F (Q2 2026: 3). Screen IRWD in the grand portfolio →
IRWD stock trades by members of Congress
No member of Congress has disclosed a trade in IRWD.
IRWD questions and answers
Are insiders buying IRWD stock?
No open-market insider purchases or sales of IRWD were filed in the last 90 days.
Which hedge funds own IRWD?
3 13F filers hold IRWD among their 50 largest positions, worth $98.8M combined. The biggest bets by portfolio weight are Sarissa Capital Management LP (21.7%), Armistice Capital, LLC (1.6%) and CM Management, LLC (0.9%).
Has Congress traded IRWD?
No member of Congress has disclosed a trade in IRWD.
Who is the largest holder of IRWD?
Among 13F filers, Armistice Capital, LLC reports the largest IRWD position, $58.7M (13,932,000 shares) in its Q2 2026 13F. The biggest bet by portfolio weight is Sarissa Capital Management LP's: 21.7% of its portfolio.
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