July 31, 2026 · Form 4 insider transaction
MAETZOLD DEREK J sold 1,690 shares of Castle Biosciences, Inc. at $30.15 per share, a transaction worth $51.0K. The trade was recorded as open-market sale under a pre-scheduled Rule 10b5-1 plan and disclosed on an SEC Form 4, filed 4 days 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 $30.000 to $30.473, 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.; Held by Derek Maetzold 2020 Irrevocable Trust of which the Reporting Person is the trustee and his children are beneficiaries.