MarketPeel
Insider Trading Intelligence
EF

Eric Duane Foster

ARDX
CHIEF COMMERCIAL OFFICER · ARDELYX, INC. · CIK 0002034148
FILING MIX · LIFETIME38%/62%
BUYS
6
SELLS
10
TOTAL VALUE
$244.4K
COMPANIES
1
ACTIVE SINCE
Aug 2024
HOLDINGS NOW
422,804
AVG SELL PX
$5.81
TRADE KIND
SHOWING 16 / 16
Trades · vs SPY
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Performance · forward returns vs SPY
7 backtested trades · 8 horizons · 17 pendingHow are these numbers computed? →
Forward-return performance of every backtestable P/S trade by Eric Duane Foster, 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
7d7+14.29%+9.09%+0.50%+8.59%+14.81%
14d7+14.29%+6.29%-0.45%+6.74%+10.50%
30d7+71.43%-4.80%-1.52%-3.28%-2.39%
60d7+14.29%+6.89%+3.26%+3.63%+1.89%
90d7+14.29%+13.07%+5.54%+12.63%+20.49%
180d7(4 pending)+0.00%+21.59%+10.79%+10.80%+3.20%
1y7(6 pending)+0.00%+46.17%+25.21%+20.96%+20.96%
2y7(7 pending)
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
ARDX · 422,804 shares · as of May 21, 2026
0109,102218,205327,307436,40920252026SHARES HELD
Trading cadence · quarterly flow
BUY SELL
2024
2024
2025
2025
2025
2025
2026
2026
FLOW · 6 buys / 10 sellsCOVERAGE · 8 quarters
Form 4 filings · all activity
COMPANYTYPESHARESPRICEVALUEHELD AFTERTRADE DATEFILEDDETAILS
ARDX
ARDELYX, INC.
SALE
Chief Commercial Officer
3,166$6.27$19.8K422,804May 21, 2026May 22, 2026View →
ARDX
ARDELYX, INC.
SALE
Chief Commercial Officer
2,405$6.27$15.1K417,972May 21, 2026May 22, 2026View →
ARDX
ARDELYX, INC.
SALE
Chief Commercial Officer
2,427$6.27$15.2K420,377May 21, 2026May 22, 2026View →
ARDX
ARDELYX, INC.
SALE
Chief Commercial Officer
1,261$5.71$7.2K425,972Feb 20, 2026Feb 23, 2026View →
ARDX
ARDELYX, INC.
SALE
Chief Commercial Officer
9,176$5.87$53.8K427,233Feb 20, 2026Feb 23, 2026View →
ARDX
ARDELYX, INC.
SALE
Chief Commercial Officer
1$5.70$6425,970Feb 20, 2026Feb 23, 2026View →
ARDX
ARDELYX, INC.
SALE
Chief Commercial Officer
1$5.71$6425,971Feb 20, 2026Feb 23, 2026View →
ARDX
ARDELYX, INC.
PURCHASEGRANT
Stock grant
206,915206,915Jan 23, 2026Jan 26, 2026View →
ARDX
ARDELYX, INC.
PURCHASEGRANT
Stock grant
137,945436,409Jan 23, 2026Jan 26, 2026View →
ARDX
ARDELYX, INC.
SALE
Chief Commercial Officer
5,814$5.54$32.2K295,684Nov 21, 2025Nov 25, 2025View →
ARDX
ARDELYX, INC.
SALE
Chief Commercial Officer
15,308$5.93$90.8K301,498Aug 21, 2025Aug 25, 2025View →
ARDX
ARDELYX, INC.
SALE
Chief Commercial Officer
2,507$4.08$10.2K316,806May 20, 2025May 22, 2025View →
ARDX
ARDELYX, INC.
PURCHASEGRANT
Stock grant
205,019205,019Feb 25, 2025Feb 27, 2025View →
ARDX
ARDELYX, INC.
PURCHASEGRANT
Stock grant
136,680316,680Feb 25, 2025Feb 27, 2025View →
ARDX
ARDELYX, INC.
PURCHASEGRANT
Stock grant
180,000180,000Aug 8, 2024Aug 16, 2024View →
ARDX
ARDELYX, INC.
PURCHASEGRANT
Stock grant
230,000230,000Aug 8, 2024Aug 16, 2024View →
Other insiders · ARDX
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About this filer
CIK 0002034148
ROLE
Chief Commercial Officer
PRIMARY
ARDX
COMPANIES
1
ACTIVE SINCE
Aug 2024
MARKETPEEL · /INSIDER/0002034148DATA · SEC EDGAR · FORM 4 · CONSOLIDATED TAPE
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