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CSTL — structural market context

Castle Biosciences, Inc. Commo

Structural market context from public regulatory and market data, shown with its as-of dates. Descriptive only: nothing on this page is a recommendation, a prediction, or advice to buy or sell any security.

CSTL short interest & days to cover

SHARES SHORT
1.6M
% OF FLOAT
—
DAYS TO COVER
3.2
CHANGE VS PRIOR
+9.9%

FINRA consolidated short interest, reported twice a month and published ~2 weeks after each settlement date. % of float uses reported free float. · as of 2026-07-31 (40d ago)

CSTL fails-to-deliver (FTD)

Settlement dateFailed sharesPrice
2026-08-11 · 29d559$32.35
2026-08-05 · 35d101$31.18
2026-08-04 · 36d46$30.39

SEC fails-to-deliver files, published twice a month with ~6 weeks of delay.

CSTL insider buying and selling (Form 4)

Last 12 months, open-market only: 0 purchases · 21 sales

InsiderTypeSharesValueFiled
Oelschlager Kristen M · officer: Chief Operating OfficerSell (S)200$7K2026-09-03
Oelschlager Kristen M · officer: Chief Operating OfficerSell (S)4K$132K2026-09-03
Juvenal Tobin W · officer: Chief Commercial OfficerSell (S)2K$57K2026-09-02
MAETZOLD DEREK J · director, officer: Pres. & Chief Exec. OfficerSell (S)2K$71K2026-09-01
MAETZOLD DEREK J · director, officer: Pres. & Chief Exec. OfficerSell (S)11K$380K2026-09-01

SEC Form 4 filings, open-market purchases and sales only (codes P and S); grants and option exercises excluded. Attributed public records.

Frequently asked questions

Are insiders buying CSTL?
In the last 12 months of SEC Form 4 filings, CSTL recorded 0 open-market insider purchases and 21 open-market sales (codes P and S; grants and option exercises excluded). These are attributed public records — information, not instruction.
Is this page telling me to buy or sell CSTL?
No. Everything on this page is descriptive, structural market context from public data, shown with its as-of dates. TradeAI News does not issue directional recommendations, price predictions, or buy/sell advice — for any ticker.
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Not financial advice. Trading involves risk. Descriptive structural context, never a recommendation.