Harrison Miles 4

What Happened

• Harrison Miles, a director of Castle Biosciences (CSTL), had 13,667 restricted stock units (RSUs) convert into 13,667 shares on May 22, 2026 (reported on Form 4 filed 2026-05-27). The filing shows an identical number—13,667 shares—reported as disposed at $0.00 (derivative). Net reported change: 13,667 shares acquired and 13,667 shares disposed, resulting in no net increase in reported shares held.

Key Details

• Transaction date: 2026-05-22; Form 4 filed: 2026-05-27.
• Transaction code: M (exercise or conversion of a derivative instrument — here RSUs converted to common shares).
• Shares acquired: 13,667 (conversion of RSUs).
• Shares disposed: 13,667 at $0.00 (reported as a derivative disposal).
• Net change in shares reported: 0 (13,667 acquired and 13,667 disposed).
• Shares owned after transaction: Not disclosed in the provided excerpt.
• Footnotes: F1—Each RSU equals the right to one share. F2—These RSUs vest in full on the earlier of the one‑year anniversary of May 22, 2026 or the day before the next Annual Meeting of Stockholders following the grant date.
• The disposal at $0.00 is commonly reported when shares are withheld to satisfy tax withholding obligations on vesting; the filing itself lists the disposal as a derivative transaction.

Context

• This transaction reflects RSU conversion/settlement rather than an open‑market purchase or sale. Because the acquired shares and disposed shares are equal, this appears to be a vesting event with simultaneous withholding rather than a cash sale.
• These kinds of conversions are routine compensation events and do not necessarily signal a change in insider sentiment.