Castle Biosciences Inc: COO Kristen M Oelschlager exercised and sold 4,153 shares

What happened

• Kristen M Oelschlager, chief operating officer, exercised options for 4,153 shares and sold a total of 4,153 shares on Oct 1, 2026. The exercise reported an acquisition of 4,153 shares at $3.38 for $14,037. The two sales were 2,807 shares at a weighted-average $35.75 for $100,350 and 1,346 shares at a weighted-average $36.38 for $48,967.

Key details

• Transaction date: Oct 1, 2026.
• Exercise (M, acquired): 4,153 shares at $3.38 each, total $14,037.
• Sales (S, disposed): 2,807 shares at $35.75 (weighted-average) for $100,350; 1,346 shares at $36.38 (weighted-average) for $48,967. Total sale proceeds $149,317.
• A separate derivative entry shows 4,153 shares disposed at $0.00 (M, derivative conversion/exercise).
• Footnote F1: sales were made under a Rule 10b5-1 plan adopted Mar 17, 2026.
• Footnotes F2/F3: the two sales were executed in multiple trades at price ranges of $35.21–$36.19 and $36.21–$36.78 respectively; reported prices are weighted averages.
• Footnote F4: certain holdings are held by the Fritz Shorter Trust (the reporting person and spouse are trustees and beneficiaries).
• Footnote F5: the shares subject to the option were fully vested.
• Filing date: Oct 5, 2026; transactions reported for Oct 1, 2026.
• Shares owned after the transaction: not stated in the filing.

Why it may matter

• The filing shows options were exercised and the resulting shares were sold the same day (cashless exercise).
• The sales were executed under a 10b5-1 plan, per the filing. A filing does not show why the insider traded or why the company acted.