Form 4 for CSTL CASTLE BIOSCIENCES INC
Accepted 2026-08-18 16:10:41 ET · period of report 2026-08-14 · accession 0001628280-26-057644 · 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026-08-18 16:10 | 2026-08-14 | CSTL | Stokes Frank | CFO | S - Sale | $29.77 | -24.9K | 35.2K | -41% | -$741.5K |
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 | 2026-08-14 | S | D | 24,908 | $29.77 | 35,177 | D | — | — | (F1) This transaction was executed in multiple trades at prices ranging from $29.71 to $29.97, 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. |