Trade Summary

1 week ago, MAETZOLD DEREK J, serving as Pres. & Chief Exec. Officer at CASTLE BIOSCIENCES INC (CSTL), sold 9,836 shares at $24.16 per share, for a total transaction value of $237,682.13. Following this transaction, MAETZOLD DEREK J now holds 11,812 shares of CSTL.

This sale represents a 45.44% decrease in MAETZOLD DEREK J's stake in the company. This is considered a high-conviction trade given the significant change in ownership.

The trade was executed on Monday, July 27, 2026 and publicly disclosed via SEC Form 4 filing on Wednesday, July 29, 2026 at 4:09 PM ET, 2 days after the trade was made.

CASTLE BIOSCIENCES INC operates in the HEALTHCARE sector, specifically within the DIAGNOSTICS & RESEARCH industry. Insider selling activity in this sector can provide valuable signals about industry trends and company-specific developments.