Form 4 for CSTL CASTLE BIOSCIENCES INC
Accepted 2026-05-26 16:06:38 ET · period of report 2026-05-21 · accession 0001628280-26-038072 · 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| D | 2026-05-26 16:06 | 2026-05-21 | CSTL | Juvenal Tobin W | Chief Commercial Off | M - OptEx | $3.38 | +11.2K | 98.0K | +13% | +$37.9K |
| D | 2026-05-26 16:06 | 2026-05-21 | CSTL | Juvenal Tobin W | Chief Commercial Off | M - OptEx | $0.00 | -11.2K | 0 | -100% | $0 |
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 | 2026-05-21 | M | A | 11,210 | $3.38 | 98,035 | D | — | — | |
| 2 | Derivative | Stock option (right to buy) | 2026-05-21 | M | D | 11,210 | $0.00 | 0 | D | $3.38 · — to 2029-03-12 | 11,210 Common Stock | (F1) The shares subject to the option are fully vested. |