Form4insider filings, from the source

Insider · CIK 0001856542

Tobin W Juvenal

Files at: CSTL. On EDGAR ↗

1M3M6M1Y2YAll datashares as filed — not split-adjusted
Open-market buys & salesbuys $0 · 0sales $279k · 2net −$279k
$10k$10k$100k$100k$1M$1MbuyssalesAug 28Sep 2Sep 7Sep 12Sep 18Sep 23Sep 28

Reported trades — common stock

TradeReported (ET)CompanySharesAvg priceTotalOwned afterΔ stakeFlags
Sep 14, 2026 SForm 4 →Sep 16, 4:20 pm EDTCASTLE BIOSCIENCES INCCSTL6,600$33.73$222,62158,584−10.1%10b5-1
Aug 31, 2026 SForm 4 →Sep 2, 4:07 pm EDTCASTLE BIOSCIENCES INCCSTL1,730$32.81$56,76165,184−2.59%10b5-1

Reported trades — derivatives (options, RSUs, warrants)

No reported derivative activity in this period.