Form 4 Filing for CASTLE BIOSCIENCES INC

This filing details a transaction by Caple Kim, a director at CASTLE BIOSCIENCES INC, on May 22, 2026. Kim acquired 13,667 shares of Common Stock. Additionally, 13,667 Restricted Stock Units (RSUs) were disposed of, with each RSU representing the right to one share of Common Stock. These RSUs vest in full on the earlier of the one-year anniversary of May 22, 2026, or the day preceding the next Annual Meeting of Stockholders. Following these transactions, Kim directly owns 36,121 shares of Common Stock and 0 RSUs.