Form 4 Filing for Juvenal Tobin W

Juvenal Tobin W, Chief Commercial Officer of CASTLE BIOSCIENCES INC, reported a transaction on May 21, 2026. The transaction involved the acquisition of 11,210 shares of Common Stock at a price of $3.38 per share, resulting in a post-transaction ownership of 98,035 shares. Additionally, a stock option (right to buy) for 11,210 shares, with an exercise price of $3.38, was exercised and disposed of on the same date. The option was fully vested. The filing was signed by Frank Stokes as Attorney-in-fact on May 26, 2026.