Form 4 for CSTL CASTLE BIOSCIENCES INC
Accepted 2025-08-12 00:00:00 ET · period of report 2025-08-08 · accession 0001239501-25-000003 · 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 | 2025-08-12 | 2025-08-08 | CSTL | MAETZOLD DEREK J | Pres, Chief Exec. Off, Dir | M - OptEx | $0.00 | +67.0K | 136.7K | +96% | $0 |
| D | 2025-08-12 | 2025-08-08 | CSTL | MAETZOLD DEREK J | Pres, Chief Exec. Off, Dir | F - Tax | $19.36 | -24.0K | 112.7K | -18% | -$464.1K |
| D | 2025-08-12 | 2025-08-08 | CSTL | MAETZOLD DEREK J | Pres, Chief Exec. Off, Dir | M - OptEx | $0.00 | -67.0K | 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 | 2025-08-08 | M | A | 66,991 | $0.00 | 136,674 | D | — | — | (F1) Reflects the transfers on July 11, 2025, of 36,907 shares of common stock from DJM Grantor Annuity Trust No. 5 and 7,416 shares of common stock from DJM Grantor Annuity Trust No. 6 to the Reporting Person's direct holdings, and the transfer on July 14, 2025, of 44,323 shares of common stock from the Reporting Person's direct holdings to DJM Grantor Annuity Trust No. 7. |
| 2 | Common | Common Stock | 2025-08-08 | F | D | 23,972 | $19.36 | 112,702 | D | — | — | |
| 3 | Derivative | Performance-Based Stock Unit | 2025-08-08 | M | D | 66,991 | $0.00 | 0 | D | — · — to — | 66,991 Common Stock | (F11) Each Performance-Based Stock Unit ("PSU") represents the right to receive one share of the Issuer's Common Stock. These PSUs represent the remaining 50% of the PSUs granted on December 23, 2022, which were all subject to time-based vesting and vested in full on the one-year anniversary of August 9, 2024. |