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CASTLE BIOSCIENCES INC (CSTL) — insider trading

Health Care · NASDAQ

CASTLE BIOSCIENCES INC (CSTL) has 39 reported SEC Form 4 insider transactions in our data, including 24 open-market sales among the most recent 39 (latest 2026-07-01).

← CSTL profile SEC Form 3/4/5 filings Yahoo insiders Ask about CSTL's insider activity →

Recent Form 4 transactions

DateInsiderRoleTypeSharesPriceValueFiling
2026-07-01 Oelschlager Kristen M Officer (Chief Operating Officer) Open-market sale 400 $24.78 $9.9K Form 4
2026-07-01 Oelschlager Kristen M Officer (Chief Operating Officer) Open-market sale 8,186 $24.40 $199.7K Form 4
2026-07-01 MAETZOLD DEREK J Director, Officer (Pres. & Chief Exec. Officer) Option exercise / conversion (derivative) 6,214 $0.00 $0 Form 4
2026-07-01 MAETZOLD DEREK J Director, Officer (Pres. & Chief Exec. Officer) Open-market sale 278 $24.29 $6.8K Form 4
2026-07-01 MAETZOLD DEREK J Director, Officer (Pres. & Chief Exec. Officer) Open-market sale 278 $24.29 $6.8K Form 4
2026-07-01 MAETZOLD DEREK J Director, Officer (Pres. & Chief Exec. Officer) Open-market sale 278 $24.29 $6.8K Form 4
2026-07-01 MAETZOLD DEREK J Director, Officer (Pres. & Chief Exec. Officer) Open-market sale 278 $24.29 $6.8K Form 4
2026-07-01 MAETZOLD DEREK J Director, Officer (Pres. & Chief Exec. Officer) Open-market sale 1,153 $24.29 $28.0K Form 4
2026-07-01 MAETZOLD DEREK J Director, Officer (Pres. & Chief Exec. Officer) Open-market sale 1,357 $24.29 $33.0K Form 4
2026-07-01 MAETZOLD DEREK J Director, Officer (Pres. & Chief Exec. Officer) Open-market sale 6,214 $24.29 $150.9K Form 4
2026-07-01 MAETZOLD DEREK J Director, Officer (Pres. & Chief Exec. Officer) Option exercise / conversion 6,214 $2.39 $14.9K Form 4
2026-06-16 Oelschlager Kristen M Officer (Chief Operating Officer) Open-market sale 8,587 $20.71 $177.8K Form 4
2026-06-15 MAETZOLD DEREK J Director, Officer (Pres. & Chief Exec. Officer) Option exercise / conversion (derivative) 550 $0.00 $0 Form 4
2026-06-15 MAETZOLD DEREK J Director, Officer (Pres. & Chief Exec. Officer) Open-market sale 278 $20.66 $5.7K Form 4
2026-06-15 MAETZOLD DEREK J Director, Officer (Pres. & Chief Exec. Officer) Open-market sale 278 $20.66 $5.7K Form 4
2026-06-15 MAETZOLD DEREK J Director, Officer (Pres. & Chief Exec. Officer) Open-market sale 278 $20.66 $5.7K Form 4
2026-06-15 MAETZOLD DEREK J Director, Officer (Pres. & Chief Exec. Officer) Open-market sale 278 $20.66 $5.7K Form 4
2026-06-15 MAETZOLD DEREK J Director, Officer (Pres. & Chief Exec. Officer) Open-market sale 1,153 $20.66 $23.8K Form 4
2026-06-15 MAETZOLD DEREK J Director, Officer (Pres. & Chief Exec. Officer) Open-market sale 1,357 $20.66 $28.0K Form 4
2026-06-15 MAETZOLD DEREK J Director, Officer (Pres. & Chief Exec. Officer) Open-market sale 550 $20.66 $11.4K Form 4
2026-06-15 MAETZOLD DEREK J Director, Officer (Pres. & Chief Exec. Officer) Option exercise / conversion 550 $2.39 $1.3K Form 4
2026-06-01 MAETZOLD DEREK J Director, Officer (Pres. & Chief Exec. Officer) Option exercise / conversion (derivative) 6,010 $0.00 $0 Form 4
2026-06-01 MAETZOLD DEREK J Director, Officer (Pres. & Chief Exec. Officer) Option exercise / conversion (derivative) 204 $0.00 $0 Form 4
2026-06-01 MAETZOLD DEREK J Director, Officer (Pres. & Chief Exec. Officer) Open-market sale 278 $20.86 $5.8K Form 4
2026-06-01 MAETZOLD DEREK J Director, Officer (Pres. & Chief Exec. Officer) Open-market sale 278 $20.86 $5.8K Form 4
2026-06-01 MAETZOLD DEREK J Director, Officer (Pres. & Chief Exec. Officer) Open-market sale 278 $20.86 $5.8K Form 4
2026-06-01 MAETZOLD DEREK J Director, Officer (Pres. & Chief Exec. Officer) Open-market sale 278 $20.86 $5.8K Form 4
2026-06-01 MAETZOLD DEREK J Director, Officer (Pres. & Chief Exec. Officer) Open-market sale 1,153 $20.86 $24.0K Form 4
2026-06-01 MAETZOLD DEREK J Director, Officer (Pres. & Chief Exec. Officer) Open-market sale 1,357 $20.86 $28.3K Form 4
2026-06-01 MAETZOLD DEREK J Director, Officer (Pres. & Chief Exec. Officer) Open-market sale 6,214 $20.86 $129.6K Form 4
2026-06-01 MAETZOLD DEREK J Director, Officer (Pres. & Chief Exec. Officer) Option exercise / conversion 6,010 $2.39 $14.4K Form 4
2026-06-01 MAETZOLD DEREK J Director, Officer (Pres. & Chief Exec. Officer) Option exercise / conversion 204 $2.39 $488 Form 4
2026-05-28 Cole G Bradley Director Grant / award / vesting (derivative) 11,766 $0.00 $0 Form 4
2026-05-28 BRADBURY DANIEL Director Grant / award / vesting (derivative) 11,766 $0.00 $0 Form 4
2026-05-28 Caple Kim Director Grant / award / vesting (derivative) 11,766 $0.00 $0 Form 4
2026-05-28 Cotton Rodney Director Grant / award / vesting (derivative) 11,766 $0.00 $0 Form 4
2026-05-28 Harrison Miles Director Grant / award / vesting (derivative) 11,766 $0.00 $0 Form 4
2026-05-28 Goldberg Ellen Director Grant / award / vesting (derivative) 11,766 $0.00 $0 Form 4
2026-05-28 Olson Tiffany Director Grant / award / vesting (derivative) 11,766 $0.00 $0 Form 4

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Transaction types are the SEC Form 4 codes: open-market purchases (P) and sales (S) are the only rows that reflect open-market conviction. Awards/vesting (A), option exercises (M/X/C), shares withheld for taxes (F) and gifts (G) are compensation or mechanical, not buying or selling on the open market. Sales may be planned and non-discretionary (e.g. a Rule 10b5-1 plan); open-market buying is not a recommendation to buy. Informational only — not financial advice.

Source: SEC EDGAR Form 3/4/5. See the full company profile: CASTLE BIOSCIENCES INC (CSTL).

Last updated 2026-07-01 (most recent filing date).

Informational only — NOT financial advice. Insider filings are sourced from SEC EDGAR and shown with their reported dates.