MarketPeel
Insider Trading Intelligence
AC

Alexander W. Casdin

ERAS
DIRECTOR · ERASCA, INC. · CIK 0001455228
FILING MIX · LIFETIME82%/18%
BUYS
14
SELLS
3
TOTAL VALUE
$384.4K
COMPANIES
1
ACTIVE SINCE
Jul 2021
HOLDINGS NOW
29,888
AVG SELL PX
TRADE KIND
SHOWING 17 / 17
Trades · vs SPY
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Performance · forward returns vs SPY
4 backtested trades · 8 horizons
Forward-return performance of every backtestable P/S trade by Alexander W. Casdin, 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
7d4+75.00%+4.49%+0.02%+4.46%+7.94%
14d4+50.00%+1.42%+0.70%+0.72%+1.87%
30d4+50.00%+2.62%+2.39%+0.23%-2.22%
60d4+75.00%+3.77%+5.93%-2.16%-2.29%
90d4+75.00%+6.81%+6.60%+0.21%+3.55%
180d4+50.00%+2.10%+11.58%-9.48%-10.02%
1y4+25.00%-10.88%+24.14%-35.02%-52.58%
2y4+50.00%+83.09%+47.87%+35.22%-25.41%
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
ERAS · 29,888 shares · as of Jun 26, 2026
0187,500375,000562,500750,00020222023202420252026SHARES HELD
Trading cadence · quarterly flow
BUY SELL
2021
2021
2022
2022
2022
2022
2023
2023
2023
2023
2024
2024
2024
2024
2025
2025
2025
2025
2026
2026
FLOW · 14 buys / 3 sellsCOVERAGE · 20 quarters
Form 4 filings · all activity
COMPANYTYPESHARESPRICEVALUEHELD AFTERTRADE DATEFILEDDETAILS
ERAS
ERASCA, INC.
PURCHASEGRANT
Stock grant
29,88829,888Jun 26, 2026Jun 29, 2026View →
ERAS
ERASCA, INC.
PURCHASEGRANT
Stock grant
23,87223,872Jan 1, 2026Jan 5, 2026View →
ERAS
ERASCA, INC.
PURCHASEGRANT
Stock grant
120,000120,000Jun 24, 2025Jun 26, 2025View →
ERAS
ERASCA, INC.
PURCHASEGRANT
Stock grant
28,87728,877Jan 1, 2025Jan 2, 2025View →
ERAS
ERASCA, INC.
PURCHASEGRANT
Stock grant
60,00060,000Jun 20, 2024Jun 21, 2024View →
ERAS
ERASCA, INC.
PURCHASE
80,000$2.27$181.9K573,974May 21, 2024May 22, 2024View →
ERAS
ERASCA, INC.
PURCHASEGRANT
Stock grant
41,08441,084Jan 1, 2024Jan 3, 2024View →
ERAS
ERASCA, INC.
PURCHASE
30,000$1.66$49.8K493,974Dec 4, 2023Dec 4, 2023View →
ERAS
ERASCA, INC.
PURCHASEGRANT
Stock grant
60,00060,000Jun 22, 2023Jun 26, 2023View →
ERAS
ERASCA, INC.
PURCHASE
20,000$2.76$55.2K463,974Apr 10, 2023Apr 11, 2023View →
ERAS
ERASCA, INC.
PURCHASE
20,000$4.87$97.5K443,974Dec 15, 2022Dec 15, 2022View →
ERAS
ERASCA, INC.
SALE
750,0000Jul 1, 2022Jul 6, 2022View →
ERAS
ERASCA, INC.
PURCHASEGRANT
Stock grant
40,00040,000Jun 22, 2022Jun 24, 2022View →
ERAS
ERASCA, INC.
SALE
900,0000Jul 20, 2021Jul 20, 2021View →
ERAS
ERASCA, INC.
SALE
180,0000Jul 20, 2021Jul 20, 2021View →
ERAS
ERASCA, INC.
PURCHASE
150,000337,500Jul 20, 2021Jul 20, 2021View →
ERAS
ERASCA, INC.
PURCHASE
750,000750,000Jul 20, 2021Jul 20, 2021View →
Other insiders · ERAS
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About this filer
CIK 0001455228
ROLE
Director
PRIMARY
ERAS
COMPANIES
1
ACTIVE SINCE
Jul 2021
MARKETPEEL · /INSIDER/0001455228DATA · SEC EDGAR · FORM 4 · CONSOLIDATED TAPE
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