Insider · CIK 0001239501
Derek J Maetzold
Files at: CSTL. On EDGAR ↗
Reported trades — common stock
| Trade | Reported (ET) | Company | Shares | Avg price | Total | Owned after | Δ stake | Flags |
|---|---|---|---|---|---|---|---|---|
| Sep 21, 2026 SForm 4 → | Sep 23, 4:27 pm EDT | CASTLE BIOSCIENCES INCCSTL | 14,496 | $35.33 | $512,202 | 9,550 | −60.3% | 10b5-1 |
| Sep 21, 2026 MForm 4 → | Sep 23, 4:27 pm EDT | CASTLE BIOSCIENCES INCCSTL | 8,580 | $2.39 | $20,506 | 30,059 | — | 10b5-1 |
| Sep 11, 2026 SForm 4 → | Sep 15, 4:08 pm EDT | CASTLE BIOSCIENCES INCCSTL | 14,518 | $32.02 | $464,870 | 12,268 | −54.2% | 10b5-1 |
| Sep 11, 2026 MForm 4 → | Sep 15, 4:08 pm EDT | CASTLE BIOSCIENCES INCCSTL | 8,584 | $2.39 | $20,516 | 30,063 | — | 10b5-1 |
| Aug 28, 2026 SForm 4 → | Sep 1, 4:12 pm EDT | CASTLE BIOSCIENCES INCCSTL | 18,560 | $33.20 | $616,134 | 11,256 | −62.2% | 10b5-1 |
| Aug 28, 2026 MForm 4 → | Sep 1, 4:12 pm EDT | CASTLE BIOSCIENCES INCCSTL | 12,428 | $2.39 | $29,703 | 33,907 | — | 10b5-1 |
Reported trades — derivatives (options, RSUs, warrants)
| Trade | Reported (ET) | Company | Shares | Avg price | Total | Owned after | Δ stake | Flags |
|---|---|---|---|---|---|---|---|---|
| Sep 21, 2026 MForm 4 → | Sep 23, 4:27 pm EDT | CASTLE BIOSCIENCES INCCSTL | 8,580 | — | — | 8,165 | — | 10b5-1 |
| Sep 11, 2026 MForm 4 → | Sep 15, 4:08 pm EDT | CASTLE BIOSCIENCES INCCSTL | 8,584 | — | — | 16,745 | — | 10b5-1 |
| Aug 28, 2026 MForm 4 → | Sep 1, 4:12 pm EDT | CASTLE BIOSCIENCES INCCSTL | 12,428 | — | — | 25,329 | — | 10b5-1 |