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Jeffrey Stein

IDYA
DIRECTOR · IDEAYA BIOSCIENCES, INC. · CIK 0001478831
FILING MIX · LIFETIME100%/0%
BUYS
8
SELLS
0
TOTAL VALUE
$1.65M
COMPANIES
1
ACTIVE SINCE
Jun 2020
HOLDINGS NOW
20,000
AVG SELL PX
TRADE KIND
SHOWING 8 / 8
Trades · vs SPY
Loading price series…
Performance · forward returns vs SPY
1 backtested trades · 8 horizons · 3 pending
Forward-return performance of every backtestable P/S trade by Jeffrey Stein, 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
7d1+100.00%+6.17%-1.18%+7.36%+7.36%
14d1+100.00%+5.30%-2.53%+7.82%+7.82%
30d1+0.00%-1.70%-4.54%+2.84%+2.84%
60d1+0.00%-14.68%+4.99%-19.67%-19.67%
90d1+0.00%-10.80%
180d1(1 pending)
1y1(1 pending)
2y1(1 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
IDYA · 20,000 shares · as of Jun 16, 2026
013,57027,14140,71154,281202120222023202420252026SHARES HELD
Trading cadence · quarterly flow
BUY SELL
2020
2020
2020
2021
2021
2021
2021
2022
2022
2022
2022
2023
2023
2023
2023
2024
2024
2024
2024
2025
2025
2025
2025
2026
2026
FLOW · 8 buys / 0 sellsCOVERAGE · 25 quarters
Form 4 filings · all activity
COMPANYTYPESHARESPRICEVALUEHELD AFTERTRADE DATEFILEDDETAILS
IDYA
IDEAYA BIOSCIENCES, INC.
PURCHASEGRANT
Stock grant
20,00020,000Jun 16, 2026Jun 18, 2026View →
IDYA
IDEAYA BIOSCIENCES, INC.
PURCHASE
50,000$32.96$1.65M54,281Mar 2, 2026Mar 2, 2026View →
IDYA
IDEAYA BIOSCIENCES, INC.
PURCHASEGRANT
Stock grant
20,00020,000Jun 24, 2025Jun 26, 2025View →
IDYA
IDEAYA BIOSCIENCES, INC.
PURCHASEGRANT
Stock grant
16,20016,200May 31, 2024May 31, 2024View →
IDYA
IDEAYA BIOSCIENCES, INC.
PURCHASEGRANT
Stock grant
16,20016,200Jun 7, 2023Jun 9, 2023View →
IDYA
IDEAYA BIOSCIENCES, INC.
PURCHASEGRANT
Stock grant
11,00011,000Jun 9, 2022Jun 10, 2022View →
IDYA
IDEAYA BIOSCIENCES, INC.
PURCHASEGRANT
Stock grant
11,00011,000Jun 10, 2021Jun 16, 2021View →
IDYA
IDEAYA BIOSCIENCES, INC.
PURCHASEGRANT
Stock grant
11,00011,000Jun 16, 2020Jun 18, 2020View →
Other insiders · IDYA
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About this filer
CIK 0001478831
ROLE
Director
PRIMARY
IDYA
COMPANIES
1
ACTIVE SINCE
Jun 2020
MARKETPEEL · /INSIDER/0001478831DATA · SEC EDGAR · FORM 4 · CONSOLIDATED TAPE
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