Form 4 for CSTL CASTLE BIOSCIENCES INC
Accepted 2026-09-02 16:07:06 ET · period of report 2026-08-31 · accession 0001628280-26-060089 · SEC index · Original document
Summary rows
Aggregated the way they appear in lists: one row per insider, transaction code and security table.
| X | Filed | Traded | Ticker | Insider | Title | Type | Price | Qty | Owned | ΔOwn | Value |
|---|---|---|---|---|---|---|---|---|---|---|---|
| T | 2026-09-02 16:07 | 2026-08-31 | CSTL | Juvenal Tobin W | Chief Commercial Off | S - Sale | $32.81 | -1,730 | 65.2K | -3% | -$56.8K |
Purchase Sale Sale after option exercise All abbreviations
Every reported transaction
| # | Table | Security | Date | Code | A/D | Shares | Price | Owned after | Own | Exercise / expiry | Underlying | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Common | Common Stock | 2026-08-31 | S | D | 1,730 | $32.81 | 65,184 | D | — | — | (F1) This transaction was made pursuant to a Rule 10b5-1 plan adopted by the Reporting Person on December 10, 2025. (F2) This transaction was executed in multiple trades at prices ranging from $32.39 to $33.17, 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. |