Trade Summary

3 days ago, MAETZOLD DEREK J, serving as Pres. & Chief Exec. Officer at CASTLE BIOSCIENCES INC (CSTL), sold 4,172 shares at $22.92 per share, for a total transaction value of $95,622.24. Following this transaction, MAETZOLD DEREK J now holds 12,090 shares of CSTL.

This sale represents a 25.65% 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 Tuesday, July 14, 2026 and publicly disclosed via SEC Form 4 filing on Thursday, July 16, 2026 at 4:16 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.