MarketPeel
Insider Trading Intelligence
BS

Bernhard E. Spiess

CSTL
CHIEF BUSINESS OFFICER · CASTLE BIOSCIENCES INC · CIK 0001782994
FILING MIX · LIFETIME28%/72%
BUYS
7
SELLS
18
TOTAL VALUE
$8.72M
COMPANIES
1
ACTIVE SINCE
May 2020
HOLDINGS NOW
15,062
AVG SELL PX
$50.05
TRADE KIND
SHOWING 25 / 25
Trades · vs SPY
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Performance · forward returns vs SPY
12 backtested trades · 8 horizons
Forward-return performance of every backtestable P/S trade by Bernhard E. Spiess, 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
7d12+66.67%+0.14%+0.58%-0.44%-1.35%
14d12+25.00%+3.47%-0.38%+3.85%+1.27%
30d12+33.33%+3.17%+0.05%+3.12%+2.65%
60d12+58.33%-0.34%+2.85%-3.19%-5.75%
90d12+25.00%+0.06%+7.00%-6.94%-1.19%
180d12+33.33%+15.29%+9.93%+5.36%+5.19%
1y12+41.67%+7.26%+19.70%-12.44%+8.68%
2y12+100.00%-53.75%+18.13%-71.89%-71.79%
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
CSTL · 15,062 shares · as of Dec 10, 2021
039,46578,930118,394157,8592021SHARES HELD
Trading cadence · quarterly flow
BUY SELL
2020
2020
2020
2021
2021
2021
2021
FLOW · 7 buys / 18 sellsCOVERAGE · 7 quarters
Form 4 filings · all activity
COMPANYTYPESHARESPRICEVALUEHELD AFTERTRADE DATEFILED
CSTL
CASTLE BIOSCIENCES INC
SALE
Chief Business Officer
366$40.52$14.8K14,696Dec 10, 2021Dec 14, 2021
CSTL
CASTLE BIOSCIENCES INC
SALE
Chief Business Officer
1,5004,500Dec 10, 2021Dec 14, 2021
CSTL
CASTLE BIOSCIENCES INC
PURCHASE
Chief Business Officer
1,50015,062Dec 10, 2021Dec 14, 2021
CSTL
CASTLE BIOSCIENCES INC
SALE
Chief Business Officer
8,038$75.24$604.8K20,925Sep 2, 2021Sep 7, 2021
CSTL
CASTLE BIOSCIENCES INC
SALE
Chief Business Officer
6,4122,304Sep 2, 2021Sep 7, 2021
CSTL
CASTLE BIOSCIENCES INC
SALE
Chief Business Officer
8,9895,889Sep 2, 2021Sep 7, 2021
CSTL
CASTLE BIOSCIENCES INC
PURCHASE
Chief Business Officer
6,412$2.39$15.3K28,963Sep 2, 2021Sep 7, 2021
CSTL
CASTLE BIOSCIENCES INC
SALE
Chief Business Officer
1,474$77.29$113.9K13,562Sep 2, 2021Sep 7, 2021
CSTL
CASTLE BIOSCIENCES INC
SALE
Chief Business Officer
5,889$76.14$448.4K15,036Sep 2, 2021Sep 7, 2021
CSTL
CASTLE BIOSCIENCES INC
PURCHASE
Chief Business Officer
8,989$1.92$17.3K22,551Sep 2, 2021Sep 7, 2021
CSTL
CASTLE BIOSCIENCES INC
SALE
Chief Business Officer
8,98914,878Jun 8, 2021Jun 10, 2021
CSTL
CASTLE BIOSCIENCES INC
PURCHASE
Chief Business Officer
8,989$1.92$17.3K22,551Jun 8, 2021Jun 10, 2021
CSTL
CASTLE BIOSCIENCES INC
SALE
Chief Business Officer
8,989$70.00$629.2K13,562Jun 8, 2021Jun 10, 2021
CSTL
CASTLE BIOSCIENCES INC
PURCHASEGRANT
Stock grant
6,0006,000Dec 10, 2020Dec 14, 2020
CSTL
CASTLE BIOSCIENCES INC
PURCHASEGRANT
Stock grant
23,00023,000Dec 10, 2020Dec 14, 2020
CSTL
CASTLE BIOSCIENCES INC
SALE
Chief Business Officer
40,000$49.97$2.00M11,747Dec 1, 2020Dec 3, 2020
CSTL
CASTLE BIOSCIENCES INC
SALE
Chief Business Officer
15,000$49.80$747.0K51,747Sep 9, 2020Sep 10, 2020
CSTL
CASTLE BIOSCIENCES INC
SALE
Chief Business Officer
14,888$49.00$729.5K66,747Sep 8, 2020Sep 9, 2020
CSTL
CASTLE BIOSCIENCES INC
SALE
Chief Business Officer
20,000$47.00$940.0K86,747Sep 4, 2020Sep 9, 2020
CSTL
CASTLE BIOSCIENCES INC
SALE
Chief Business Officer
5,112$49.00$250.5K81,635Sep 4, 2020Sep 9, 2020
CSTL
CASTLE BIOSCIENCES INC
SALE
Chief Business Officer
20,000$45.00$900.0K105,626Aug 19, 2020Aug 21, 2020
CSTL
CASTLE BIOSCIENCES INC
SALE
Chief Business Officer
31,833$38.18$1.22M126,026Jun 2, 2020Jun 4, 2020
CSTL
CASTLE BIOSCIENCES INC
SALE
Chief Business Officer
400$38.94$15.6K125,626Jun 2, 2020Jun 4, 2020
CSTL
CASTLE BIOSCIENCES INC
SALE
Chief Business Officer
32,23323,867May 8, 2020May 12, 2020
CSTL
CASTLE BIOSCIENCES INC
PURCHASE
Chief Business Officer
32,233$1.92$61.9K157,859May 8, 2020May 12, 2020
Other insiders · CSTL
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About this filer
CIK 0001782994
ROLE
Chief Business Officer
PRIMARY
CSTL
COMPANIES
1
ACTIVE SINCE
May 2020
MARKETPEEL · /INSIDER/0001782994DATA · SEC EDGAR · FORM 4 · CONSOLIDATED TAPE
FREE · DAILY · 6 AM ET

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