SEC Form 4 · accession 0001628280-26-052648
CASTLE BIOSCIENCES INC · CSTL
Statement of changes in beneficial ownership, as filed. Original on EDGAR ↗
Reporting owner
Tobin W Juvenal
Officer — Chief Commercial Officer
Period of report
Jul 31, 2026
Accepted (ET)
Aug 4, 2026 · 4:36 pm EDT
Rule 10b5-1 plan
yes — trade under a plan
Issuer CIK
0001447362
Table I — non-derivative securities
| Security | Date | Code | Shares | Price | A/D | Owned after | D/I | Nature of ownership |
|---|---|---|---|---|---|---|---|---|
| Common StockF2 | Jul 31, 2026 | S | 8,149 | $28.842 | D | 89,886 | D | |
| Common StockF3 | Jul 31, 2026 | S | 7,270 | $29.579 | D | 82,616 | D | |
| Common StockF4 | Jul 31, 2026 | S | 1,891 | $30.264 | D | 80,725 | D | |
| Common StockF5 | Aug 3, 2026 | S | 1,730 | $28.25 | D | 78,995 | D |
Table II — derivative securities
No Table II lines on this filing.
Explanation of responses
- F1This transaction was made pursuant to a Rule 10b5-1 plan adopted by the Reporting Person on December 10, 2025.
- F2This transaction was executed in multiple trades at prices ranging from $28.150 to $29.140, 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.
- F3This transaction was executed in multiple trades at prices ranging from $29.150 to $30.130, 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 $30.150 to $30.645, 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.
- F5This transaction was executed in multiple trades at prices ranging from $28.030 to $28.630, 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.