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Sarissa Capital Management Lp

IRWD
DIRECTOR · IRONWOOD PHARMACEUTICALS INC · CIK 0001577524
FILING MIX · LIFETIME88%/12%
BUYS
42
SELLS
6
TOTAL VALUE
$97.75M
COMPANIES
3
ACTIVE SINCE
Feb 2021
HOLDINGS NOW
5,910,563
AVG SELL PX
$3.53
TRADE KIND
SHOWING 48 / 48
Trades · vs SPY
Loading price series…
Performance · forward returns vs SPY
20 backtested trades · 8 horizons · 3 pendingHow are these numbers computed? →
Forward-return performance of every backtestable P/S trade by Sarissa Capital Management Lp, measured at 8 horizons from 7 days to 2 years. Deduped per economic event so co-filings count once. Excess return = trade return minus SPY return over the same window.
HORIZONTRADESWIN RATEINSIDER RETURNSPY RETURNMEAN EXCESSMEDIAN EXCESST-STAT
7d20+75.00%+1.58%+0.55%+1.03%+1.27%—
14d20+75.00%+0.03%+0.97%-0.94%-0.04%—
30d20+35.00%-2.80%+2.23%-5.03%-6.48%—
60d20+65.00%-1.76%+6.31%-8.08%-3.46%—
90d20+70.00%+1.24%+6.30%-5.06%-1.78%—
180d20+85.00%+6.12%+11.80%-5.68%+2.56%—
1y20+85.00%+9.13%+21.21%-12.09%-4.40%—
2y20(3 pending)+100.00%+20.13%+28.63%-8.49%+0.99%—
How to read this: Insider Returnis the average raw return of the filer's trades over the horizon. SPY Return is what SPY did over those same windows — reference only, not a comparison. The headline alpha number is Mean Excess = Insider − SPY; green means the filer beat SPY, red means they trailed it. Win rate is the share of individual trades where the filer beat SPY. T-statvalues above 2 mean the alpha is unlikely to be chance given the sample size. "Pending" counts trades where the horizon hasn't elapsed yet; their stats are not included in the row average.
Holdings over time
IRWD · 251,858 shares · as of Dec 15, 2025
04,097,5008,195,00012,292,50016,390,0002022202320242025SHARES HELD
Trading cadence · quarterly flow
BUY ● SELL ●
2021
2021
2021
2021
2022
2022
2022
2022
2023
2023
2023
2023
2024
2024
2024
2024
2025
2025
2025
2025
FLOW · 42 buys / 6 sellsCOVERAGE · 20 quarters
Form 4 filings · all activity
COMPANYTYPESHARESPRICEVALUEHELD AFTERTRADE DATEFILEDDETAILS
IRWD
IRONWOOD PHARMACEUTICALS INC
PURCHASEGRANT
Stock grant
4,178——251,858Dec 15, 2025Dec 17, 2025 ↗View →
IRWD
IRONWOOD PHARMACEUTICALS INC
PURCHASEGRANT
Stock grant
24,193——235,962Jun 13, 2025Jun 17, 2025 ↗View →
IRWD
IRONWOOD PHARMACEUTICALS INC
PURCHASEGRANT
Stock grant
45,000——211,769Jun 10, 2025Jun 12, 2025 ↗View →
IRWD
IRONWOOD PHARMACEUTICALS INC
PURCHASEGRANT
Stock grant
10,416——166,769Apr 2, 2025Apr 4, 2025 ↗View →
INVA
INNOVIVA, INC.
SALE
1,196,746$17.52$20.96M5,658,705Mar 6, 2025Mar 6, 2025 ↗View →
INVA
INNOVIVA, INC.
SALE
270,374$17.63$4.77M6,855,451Mar 5, 2025Mar 6, 2025 ↗View →
INVA
INNOVIVA, INC.
SALE
151,175$17.63$2.67M7,125,825Mar 4, 2025Mar 6, 2025 ↗View →
IRWD
IRONWOOD PHARMACEUTICALS INC
PURCHASEGRANT
Stock grant
4,249——156,353Dec 16, 2024Dec 18, 2024 ↗View →
IRWD
IRONWOOD PHARMACEUTICALS INC
PURCHASEGRANT
Stock grant
3,282——152,104Sep 16, 2024Sep 18, 2024 ↗View →
IRWD
IRONWOOD PHARMACEUTICALS INC
PURCHASEGRANT
Stock grant
24,311——148,822Jun 18, 2024Jun 21, 2024 ↗View →
IRWD
IRONWOOD PHARMACEUTICALS INC
PURCHASEGRANT
Stock grant
2,572——124,511Jun 15, 2024Jun 18, 2024 ↗View →
IRWD
IRONWOOD PHARMACEUTICALS INC
PURCHASEGRANT
Stock grant
1,662——121,939Mar 15, 2024Mar 19, 2024 ↗View →
IRWD
IRONWOOD PHARMACEUTICALS INC
PURCHASEGRANT
Stock grant
1,347——120,277Dec 15, 2023Dec 19, 2023 ↗View →
IRWD
IRONWOOD PHARMACEUTICALS INC
PURCHASEGRANT
Stock grant
1,798——118,930Sep 15, 2023Sep 19, 2023 ↗View →
IRWD
IRONWOOD PHARMACEUTICALS INC
PURCHASEGRANT
Stock grant
22,350——117,132Jun 20, 2023Jun 22, 2023 ↗View →
INVA
INNOVIVA, INC.
PURCHASE
62,000$13.13$814.2K7,277,000Jun 15, 2023Jun 20, 2023 ↗View →
IRWD
IRONWOOD PHARMACEUTICALS INC
PURCHASEGRANT
Stock grant
1,359——94,782Jun 15, 2023Jun 20, 2023 ↗View →
INVA
INNOVIVA, INC.
PURCHASE
8,000$13.05$104.4K7,215,000Jun 6, 2023Jun 7, 2023 ↗View →
INVA
INNOVIVA, INC.
PURCHASE
7,000$13.04$91.3K7,207,000Jun 5, 2023Jun 7, 2023 ↗View →
INVA
INNOVIVA, INC.
PURCHASE
120,000$13.01$1.56M7,200,000May 30, 2023May 30, 2023 ↗View →
INVA
INNOVIVA, INC.
PURCHASE
30,000$13.12$393.7K7,080,000May 26, 2023May 30, 2023 ↗View →
INVA
INNOVIVA, INC.
PURCHASE
50,000$13.09$654.3K7,050,000May 25, 2023May 30, 2023 ↗View →
INVA
INNOVIVA, INC.
PURCHASE
36,000$13.48$485.1K7,000,000May 19, 2023May 19, 2023 ↗View →
INVA
INNOVIVA, INC.
PURCHASE
10,000$13.05$130.5K6,964,000May 18, 2023May 19, 2023 ↗View →
INVA
INNOVIVA, INC.
PURCHASE
10,000$13.05$130.5K6,964,000May 18, 2023May 19, 2023 ↗View →
INVA
INNOVIVA, INC.
PURCHASE
50,000$13.07$653.7K6,954,000May 17, 2023May 19, 2023 ↗View →
INVA
INNOVIVA, INC.
PURCHASE
50,000$13.07$653.7K6,954,000May 17, 2023May 19, 2023 ↗View →
INVA
INNOVIVA, INC.
PURCHASE
290,000$12.34$3.58M6,904,000May 11, 2023May 15, 2023 ↗View →
IRWD
IRONWOOD PHARMACEUTICALS INC
PURCHASEGRANT
Stock grant
1,438——93,423Mar 15, 2023Mar 17, 2023 ↗View →
IRWD
IRONWOOD PHARMACEUTICALS INC
PURCHASEGRANT
Stock grant
1,244——91,985Dec 15, 2022Dec 19, 2022 ↗View →
IRWD
IRONWOOD PHARMACEUTICALS INC
PURCHASEGRANT
Stock grant
1,374——90,741Sep 15, 2022Sep 19, 2022 ↗View →
IRWD
IRONWOOD PHARMACEUTICALS INC
PURCHASEGRANT
Stock grant
1,222——89,367Jun 15, 2022Jun 17, 2022 ↗View →
IRWD
IRONWOOD PHARMACEUTICALS INC
PURCHASEGRANT
Stock grant
21,571——88,145Jun 1, 2022Jun 3, 2022 ↗View →
IRWD
IRONWOOD PHARMACEUTICALS INC
PURCHASEGRANT
Stock grant
1,152——66,574Mar 15, 2022Mar 17, 2022 ↗View →
IRWD
IRONWOOD PHARMACEUTICALS INC
PURCHASEGRANT
Stock grant
1,211——65,422Dec 15, 2021Dec 17, 2021 ↗View →
IRWD
IRONWOOD PHARMACEUTICALS INC
PURCHASEGRANT
Stock grant
1,137——64,211Sep 15, 2021Sep 17, 2021 ↗View →
IRWD
IRONWOOD PHARMACEUTICALS INC
PURCHASEGRANT
Stock grant
1,229——63,074Jun 15, 2021Jun 16, 2021 ↗View →
IRWD
IRONWOOD PHARMACEUTICALS INC
PURCHASEGRANT
Stock grant
22,766——61,845Jun 2, 2021Jun 4, 2021 ↗View →
IRWD
IRONWOOD PHARMACEUTICALS INC
PURCHASEGRANT
Stock grant
1,235——39,079Mar 15, 2021Mar 17, 2021 ↗View →
IRWD
IRONWOOD PHARMACEUTICALS INC
PURCHASE
75,000$10.54$790.5K16,390,000Mar 10, 2021Mar 10, 2021 ↗View →
IRWD
IRONWOOD PHARMACEUTICALS INC
PURCHASE
150,000$10.30$1.54M16,315,000Mar 8, 2021Mar 10, 2021 ↗View →
IRWD
IRONWOOD PHARMACEUTICALS INC
PURCHASE
175,000$10.01$1.75M16,165,000Mar 5, 2021Mar 5, 2021 ↗View →
IRWD
IRONWOOD PHARMACEUTICALS INC
PURCHASE
250,000$10.00$2.50M15,990,000Mar 4, 2021Mar 5, 2021 ↗View →
IRWD
IRONWOOD PHARMACEUTICALS INC
PURCHASE
350,000$10.02$3.51M15,740,000Mar 3, 2021Mar 5, 2021 ↗View →
ITRM
ITERUM THERAPEUTICS PLC
SALE
10,619,949$2.27$24.11M0Feb 12, 2021Feb 12, 2021 ↗View →
ITRM
ITERUM THERAPEUTICS PLC
SALE
15,000,000——0Feb 11, 2021Feb 12, 2021 ↗View →
ITRM
ITERUM THERAPEUTICS PLC
PURCHASE
20,619,949——20,616,949Feb 11, 2021Feb 12, 2021 ↗View →
ITRM
ITERUM THERAPEUTICS PLC
SALE
10,000,000$2.59$25.90M10,619,949Feb 11, 2021Feb 12, 2021 ↗View →
Other insiders · IRWD
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About this filer
CIK 0001577524
ROLE
Director
PRIMARY
IRWD
COMPANIES
3
ACTIVE SINCE
Feb 2021
MARKETPEEL · /INSIDER/0001577524DATA · SEC EDGAR · FORM 4 · CONSOLIDATED TAPE
FREE · DAILY · 6 AM ET

The morning brief, before the bell.

One short email. Insider buys, congressional trades, and plain-English analysis.

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