Form 4 Filing for Kristen M. Oelschlager

Kristen M. Oelschlager, Chief Operating Officer of CASTLE BIOSCIENCES INC, reported a disposition of 8587 shares of Common Stock on June 16, 2026, pursuant to a Rule 10b5-1 plan. The weighted-average sale price was $20.71 per share. Following this transaction, Ms. Oelschlager directly owns 30,460 shares. Additionally, the filing indicates that 97,251 shares are held indirectly through The Fritz Shorter Trust, of which Ms. Oelschlager and her spouse are trustees and beneficiaries.