MarketPeel
Insider Trading Intelligence
DW

Darin J. Weber

PROK
SVP OF REGULATORY DEVELOPMENT · PROKIDNEY CORP. · CIK 0001936228
FILING MIX · LIFETIME42%/58%
BUYS
10
SELLS
14
TOTAL VALUE
$707.1K
COMPANIES
1
ACTIVE SINCE
Jul 2022
HOLDINGS NOW
400,000
AVG SELL PX
$2.58
TRADE KIND
SHOWING 24 / 24
Trades · vs SPY
Loading price series…
Performance · forward returns vs SPY
10 backtested trades · 8 horizons · 4 pendingHow are these numbers computed? →
Forward-return performance of every backtestable P/S trade by Darin J. Weber, 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
7d10+80.00%-6.26%-0.21%-6.04%-8.70%
14d10+80.00%-10.29%-0.07%-10.22%-18.22%
30d10+50.00%+15.19%+2.70%+12.49%+10.81%
60d10+60.00%+3.61%+5.09%-1.49%-12.12%
90d10+80.00%-8.27%+7.60%-15.87%-27.26%
180d10+90.00%-29.87%+11.95%-41.82%-45.01%
1y10(1 pending)+77.78%-47.09%+10.33%-57.42%-73.77%
2y10(3 pending)+71.43%-18.90%+38.46%-57.37%-67.30%
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
PROK · 400,000 shares · as of Mar 1, 2026
0169,089338,178507,267676,3562023202420252026SHARES HELD
Trading cadence · quarterly flow
BUY SELL
2022
2022
2023
2023
2023
2023
2024
2024
2024
2024
2025
2025
2025
2025
2026
FLOW · 10 buys / 14 sellsCOVERAGE · 15 quarters
Form 4 filings · all activity
COMPANYTYPESHARESPRICEVALUEHELD AFTERTRADE DATEFILEDDETAILS
PROK
PROKIDNEY CORP.
PURCHASEGRANT
Stock grant
400,000400,000Mar 1, 2026Mar 3, 2026View →
PROK
PROKIDNEY CORP.
SALE10b5-1
10b5-1 plan
103,480$3.02$312.5K0Jul 8, 2025Jul 9, 2025View →
PROK
PROKIDNEY CORP.
PURCHASEGRANT
Stock grant
450,000450,000Mar 1, 2025Mar 4, 2025View →
PROK
PROKIDNEY CORP.
SALE10b5-1
10b5-1 plan
16,412$2.50$41.0K103,480Sep 19, 2024Sep 20, 2024View →
PROK
PROKIDNEY CORP.
SALE10b5-1
10b5-1 plan
826$2.50$2.1K119,892Jul 26, 2024Jul 29, 2024View →
PROK
PROKIDNEY CORP.
SALE10b5-1
10b5-1 plan
17,238$2.82$48.6K120,718Jun 18, 2024Jun 20, 2024View →
PROK
PROKIDNEY CORP.
SALE10b5-1
10b5-1 plan
17,238$4.08$70.4K137,956May 20, 2024May 22, 2024View →
PROK
PROKIDNEY CORP.
SALE10b5-1
10b5-1 plan
16,438$2.51$41.3K155,194Apr 22, 2024Apr 23, 2024View →
PROK
PROKIDNEY CORP.
SALE10b5-1
10b5-1 plan
800$2.54$2.0K171,632Apr 18, 2024Apr 23, 2024View →
PROK
PROKIDNEY CORP.
SALE10b5-1
10b5-1 plan
17,238$2.50$43.1K172,432Apr 16, 2024Apr 17, 2024View →
PROK
PROKIDNEY CORP.
SALE10b5-1
10b5-1 plan
84,103$1.73$145.5K189,670Apr 12, 2024Apr 16, 2024View →
PROK
PROKIDNEY CORP.
SALE10b5-1
10b5-1 plan
300$1.69$507273,773Apr 1, 2024Apr 16, 2024View →
PROK
PROKIDNEY CORP.
PURCHASEGRANT
Stock grant
117,264117,264Mar 1, 2024Mar 5, 2024View →
PROK
PROKIDNEY CORP.
PURCHASEGRANT
Stock grant
225,000225,000Mar 1, 2024Mar 5, 2024View →
PROK
PROKIDNEY CORP.
SALE
SVP of Regulatory Development
137,073402,283Feb 5, 2024Feb 6, 2024View →
PROK
PROKIDNEY CORP.
PURCHASE
SVP of Regulatory Development
137,073274,073Feb 5, 2024Feb 6, 2024View →
PROK
PROKIDNEY CORP.
SALE
SVP of Regulatory Development
137,073402,283Feb 5, 2024Feb 6, 2024View →
PROK
PROKIDNEY CORP.
SALE
SVP of Regulatory Development
137,000539,356Aug 25, 2023Aug 29, 2023View →
PROK
PROKIDNEY CORP.
PURCHASE
SVP of Regulatory Development
137,000137,000Aug 25, 2023Aug 29, 2023View →
PROK
PROKIDNEY CORP.
SALE
SVP of Regulatory Development
137,000539,356Aug 25, 2023Aug 29, 2023View →
PROK
PROKIDNEY CORP.
PURCHASEGRANT
Stock grant
250,000250,000Jan 16, 2023Jan 18, 2023View →
PROK
PROKIDNEY CORP.
PURCHASEGRANT
Stock grant
418,076418,076Oct 20, 2022Oct 24, 2022View →
PROK
PROKIDNEY CORP.
PURCHASEGRANT
Stock grant
676,356676,356Jul 11, 2022Jul 13, 2022View →
PROK
PROKIDNEY CORP.
PURCHASEGRANT
Stock grant
676,356676,356Jul 11, 2022Jul 13, 2022View →
Other insiders · PROK
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About this filer
CIK 0001936228
ROLE
SVP of Regulatory Development
PRIMARY
PROK
COMPANIES
1
ACTIVE SINCE
Jul 2022
MARKETPEEL · /INSIDER/0001936228DATA · SEC EDGAR · FORM 4 · CONSOLIDATED TAPE
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