MarketPeel
Insider Trading Intelligence
JS

Judith Anne Shizuru

JSPR
DIRECTOR · JASPER THERAPEUTICS, INC. · CIK 0001883000
FILING MIX · LIFETIME100%/0%
BUYS
7
SELLS
0
TOTAL VALUE
$99.6K
COMPANIES
1
ACTIVE SINCE
Mar 2022
HOLDINGS NOW
41,000
AVG SELL PX
TRADE KIND
SHOWING 7 / 7
Trades · vs SPY
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Performance · forward returns vs SPY
2 backtested trades · 8 horizons · 4 pending
Forward-return performance of every backtestable P/S trade by Judith Anne Shizuru, 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
7d2+0.00%-1.97%-0.47%-1.50%-1.50%
14d2+0.00%-5.51%+0.71%-6.23%-6.23%
30d2+0.00%-5.51%+0.14%-5.66%-5.66%
60d2+0.00%-33.07%-1.17%-31.90%-31.90%
90d2+0.00%-24.80%+2.70%-27.50%-27.50%
180d2+0.00%-51.58%-2.74%-48.84%-48.84%
1y2(2 pending)
2y2(2 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
JSPR · 41,000 shares · as of Sep 22, 2025
0289,753579,506869,2591,159,012202320242025SHARES HELD
Trading cadence · quarterly flow
BUY SELL
2022
2022
2022
2022
2023
2023
2023
2023
2024
2024
2024
2024
2025
2025
2025
FLOW · 7 buys / 0 sellsCOVERAGE · 15 quarters
Form 4 filings · all activity
COMPANYTYPESHARESPRICEVALUEHELD AFTERTRADE DATEFILEDDETAILS
JSPR
JASPER THERAPEUTICS, INC.
PURCHASE
41,000$2.43$99.6K156,901Sep 22, 2025Sep 24, 2025View →
JSPR
JASPER THERAPEUTICS, INC.
PURCHASE
41,00041,000Sep 22, 2025Sep 24, 2025View →
JSPR
JASPER THERAPEUTICS, INC.
PURCHASEGRANT
Stock grant
7,5007,500Jul 3, 2025Jul 3, 2025View →
JSPR
JASPER THERAPEUTICS, INC.
PURCHASEGRANT
Stock grant
7,5007,500Jun 6, 2024Jun 10, 2024View →
JSPR
JASPER THERAPEUTICS, INC.
PURCHASEGRANT
Stock grant
47,00047,000Jun 7, 2023Jun 8, 2023View →
JSPR
JASPER THERAPEUTICS, INC.
PURCHASEGRANT
Stock grant
29,5001,159,012Oct 12, 2022Oct 13, 2022View →
JSPR
JASPER THERAPEUTICS, INC.
PURCHASEGRANT
Stock grant
78,04578,045Mar 21, 2022Mar 23, 2022View →
Other insiders · JSPR
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About this filer
CIK 0001883000
ROLE
Director
PRIMARY
JSPR
COMPANIES
1
ACTIVE SINCE
Mar 2022
MARKETPEEL · /INSIDER/0001883000DATA · SEC EDGAR · FORM 4 · CONSOLIDATED TAPE
FREE · DAILY · 6 AM ET

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