SEC Form 4 · accession 0001628280-26-059091
CASTLE BIOSCIENCES INC · CSTL
Statement of changes in beneficial ownership, as filed. Original on EDGAR ↗
Reporting owner
Kristen M Oelschlager
Officer — Chief Operating Officer
Period of report
Aug 24, 2026
Accepted (ET)
Aug 26, 2026 · 4:16 pm EDT
Rule 10b5-1 plan
box not checked
Issuer CIK
0001447362
Table I — non-derivative securities
| Security | Date | Code | Shares | Price | A/D | Owned after | D/I | Nature of ownership |
|---|---|---|---|---|---|---|---|---|
| Common StockF1,F2 | Aug 24, 2026 | S | 12,218 | $33.687 | D | 85,033 | I | The Fritz Shorter Trust |
| Common StockF3,F2 | Aug 25, 2026 | S | 7,161 | $34.263 | D | 77,872 | I | The Fritz Shorter Trust |
| Common StockF4,F2 | Aug 25, 2026 | S | 5,223 | $34.639 | D | 72,649 | I | The Fritz Shorter Trust |
| Common Stock | holding | — | — | — | 13,288 | D |
Table II — derivative securities
No Table II lines on this filing.
Explanation of responses
- F1This transaction was executed in multiple trades at prices ranging from $33.500 to $33.885, inclusive. The price reported above reflects the weighted-average sale price. The Reporting Person hereby undertakes to provide upon request to the Securities and Exchange Commission staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.
- F2Held by the Fritz Shorter Trust of which the Reporting Person and her spouse are the trustees and beneficiaries.
- F3This transaction was executed in multiple trades at prices ranging from $33.470 to $34.460, inclusive. The price reported above reflects the weighted-average sale price. The Reporting Person hereby undertakes to provide upon request to the Securities and Exchange Commission staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.
- F4This transaction was executed in multiple trades at prices ranging from $34.495 to $34.750, inclusive. The price reported above reflects the weighted-average sale price. The Reporting Person hereby undertakes to provide upon request to the Securities and Exchange Commission staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.