March 18, 2026 · Form 4 insider transaction
MAETZOLD DEREK J sold 650 shares of Castle Biosciences, Inc. at $25.39 per share, a transaction worth $16.5K. The trade was recorded as open-market sale under a pre-scheduled Rule 10b5-1 plan and disclosed on an SEC Form 4, filed 1 day after the transaction.
These transactions were made pursuant to a Rule 10b5-1 plan adopted by the Reporting Person on December 3, 2025.; This transaction was executed in multiple trades at prices ranging from $25.26 to $25.48, inclusive. The price reported above reflects the weighted-average sale price. The Reporting Person hereby undertakes to provide upon request to the Securities and Exchange Commission staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.