Form 4 Filing for Harrison Miles

Harrison Miles, a director at CASTLE BIOSCIENCES INC (CSTL), reported a transaction on May 22, 2026. Miles acquired 13,667 shares of Common Stock through the vesting of 13,667 Restricted Stock Units (RSUs). The RSUs vested on the grant date, with each RSU representing one share of common stock. The RSUs vest in full on the earlier of the one-year anniversary of the grant date (May 22, 2026) or the day before the next Annual Meeting of Stockholders. Following this transaction, Miles directly owns 35,631 shares of common stock. The acquisition of shares had a reported price of $0.00, indicating it was part of a vesting award rather than an open market purchase. The filing was made on May 27, 2025, signed by Frank Stokes as attorney-in-fact.