AlphaYouDJ
Insider selling
Derek J Maetzold sold $1.2M of Castle Biosciences Inc (CSTL) stock
Derek J Maetzold, Pres. & Chief Exec. Officer of Castle Biosciences Inc (CSTL), sold 39,016 shares of CSTL stock worth $1.2M, per an SEC Form 4 filed Aug 6, 2026.
The sale was pre-arranged (a 10b5-1 plan or an option exercise), not a fresh decision.
The trade happened on Aug 4, 2026, 2 days before it was made public.
CSTL has moved +10.4% since the trade date, from $31.18 to $34.42 (Oct 9, 2026 close).
- Traded
- Aug 4, 2026
- Disclosed
- Aug 6, 2026
- Filing delay
- 2 days
- Price since
- +10.4%
- Role
- Pres. & Chief Exec. Officer
- Source
- SEC Form 4
More CSTL insider and Congress trades
From a public SEC Form 4, linked above. Not investment advice, and not a recommendation to buy or sell.