Form 4 for CSTL CASTLE BIOSCIENCES INC
Accepted 2026-01-14 00:00:00 ET · period of report 2026-01-12 · accession 0001239501-26-000002 · 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 | 2026-01-14 | 2026-01-12 | CSTL | MAETZOLD DEREK J | Pres, Chief Exec. Off, Dir | A - Grant | $0.00 | +62.2K | 91.7K | +211% | $0 |
| D | 2026-01-14 | 2026-01-12 | CSTL | MAETZOLD DEREK J | Pres, Chief Exec. Off, Dir | A - Grant | $0.00 | +62.2K | 62.2K | New | $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 | 2026-01-12 | A | A | 62,219 | $0.00 | 91,732 | D | — | — | (F1) Represents 50% of the Performance-Based Stock Units ("PSUs") granted on March 4, 2024 ("2024 PSUs") that vested based on the satisfaction of certain performance criteria as certified by the board of directors of the Issuer on January 12, 2026. |
| 2 | Derivative | Performance-Based Stock Unit | 2026-01-12 | A | A | 62,219 | $0.00 | 62,219 | D | — · — to — | 62,219 Common Stock | (F11) Each PSU represents the right to receive one share of the Issuer's Common Stock. These PSUs represent the remaining 50% of the 2024 PSUs which will vest subject to the achievement of certain milestones. |