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 $1.3M · 6net −$1.3M
$10k$10k$100k$100k$1M$1MbuyssalesNov 23Jan 11Mar 1Apr 20Jun 8Jul 27Sep 15

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
Aug 25, 2026 SForm 4 →Aug 27, 4:38 pm EDTCASTLE BIOSCIENCES INCCSTL9,050$35.04$317,11266,914−11.9%10b5-1
Aug 17, 2026 SForm 4 →Aug 19, 4:11 pm EDTCASTLE BIOSCIENCES INCCSTL1,730$29.59$51,19175,964−2.23%10b5-1
Jul 31, 2026 SForm 4 →Aug 4, 4:36 pm EDTCASTLE BIOSCIENCES INCCSTL19,040$29.21$556,17578,995−19.4%10b5-1
Nov 24, 2025 SForm 4 →Aug 6, 2026, 4:14 pm EDTCASTLE BIOSCIENCES INCCSTL1,301$38.39$49,94577,694−1.65%10b5-1 late

Reported trades — derivatives (options, RSUs, warrants)

No reported derivative activity in this period.