MAETZOLD DEREK J (CIK 1239501) reported 238 SEC Form 4 insider transactions across 1 companies over the past 18 months (most recent 2026-08-18). Recent activity: Buy CSTL (1,100 shares), Sell CSTL (1,100 shares), Sell CSTL (2,714 shares), Sell CSTL (2,306 shares), Sell CSTL (278 shares). Source: SEC Form 4.
| Date | Company | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-08-18 | CASTLE BIOSCIENCES INC (CSTL) | Pres. & Chief Exec. Officer | Buy | 1,100 | $2,629 |
| 2026-08-18 | CASTLE BIOSCIENCES INC (CSTL) | Pres. & Chief Exec. Officer | Sell | 1,100 | $33,022 |
| 2026-08-18 | CASTLE BIOSCIENCES INC (CSTL) | Pres. & Chief Exec. Officer | Sell | 2,714 | $81,474 |
| 2026-08-18 | CASTLE BIOSCIENCES INC (CSTL) | Pres. & Chief Exec. Officer | Sell | 2,306 | $69,226 |
| 2026-08-18 | CASTLE BIOSCIENCES INC (CSTL) | Pres. & Chief Exec. Officer | Sell | 278 | $8,346 |
| 2026-08-18 | CASTLE BIOSCIENCES INC (CSTL) | Pres. & Chief Exec. Officer | Sell | 278 | $8,346 |
| 2026-08-18 | CASTLE BIOSCIENCES INC (CSTL) | Pres. & Chief Exec. Officer | Sell | 278 | $8,346 |
| 2026-08-18 | CASTLE BIOSCIENCES INC (CSTL) | Pres. & Chief Exec. Officer | Sell | 278 | $8,346 |
| 2026-08-06 | CASTLE BIOSCIENCES INC (CSTL) | Pres. & Chief Exec. Officer | Sell | 11,935 | $373,995 |
| 2026-08-06 | CASTLE BIOSCIENCES INC (CSTL) | Pres. & Chief Exec. Officer | Sell | 8,421 | $259,266 |
| 2026-08-06 | CASTLE BIOSCIENCES INC (CSTL) | Pres. & Chief Exec. Officer | Sell | 3,374 | $103,879 |
| 2026-08-06 | CASTLE BIOSCIENCES INC (CSTL) | Pres. & Chief Exec. Officer | Sell | 2,866 | $88,238 |
| 2026-08-06 | CASTLE BIOSCIENCES INC (CSTL) | Pres. & Chief Exec. Officer | Buy | 20,356 | $48,651 |
| 2026-08-06 | CASTLE BIOSCIENCES INC (CSTL) | Pres. & Chief Exec. Officer | Sell | 4,782 | $149,849 |
| 2026-08-06 | CASTLE BIOSCIENCES INC (CSTL) | Pres. & Chief Exec. Officer | Sell | 4,063 | $127,318 |
| 2026-08-06 | CASTLE BIOSCIENCES INC (CSTL) | Pres. & Chief Exec. Officer | Buy | 2,546 | $6,085 |
| 2026-08-06 | CASTLE BIOSCIENCES INC (CSTL) | Pres. & Chief Exec. Officer | Sell | 2,546 | $78,114 |
| 2026-08-06 | CASTLE BIOSCIENCES INC (CSTL) | Pres. & Chief Exec. Officer | Sell | 556 | $17,059 |
| 2026-08-06 | CASTLE BIOSCIENCES INC (CSTL) | Pres. & Chief Exec. Officer | Sell | 473 | $14,512 |
| 2026-08-04 | CASTLE BIOSCIENCES INC (CSTL) | Pres. & Chief Exec. Officer | Buy | 6,480 | $15,487 |
| 2026-08-04 | CASTLE BIOSCIENCES INC (CSTL) | Pres. & Chief Exec. Officer | Sell | 6,480 | $195,385 |
| 2026-08-04 | CASTLE BIOSCIENCES INC (CSTL) | Pres. & Chief Exec. Officer | Sell | 1,983 | $59,791 |
| 2026-08-04 | CASTLE BIOSCIENCES INC (CSTL) | Pres. & Chief Exec. Officer | Sell | 1,690 | $50,957 |
| 2026-08-04 | CASTLE BIOSCIENCES INC (CSTL) | Pres. & Chief Exec. Officer | Buy | 10,664 | $25,487 |
| 2026-08-04 | CASTLE BIOSCIENCES INC (CSTL) | Pres. & Chief Exec. Officer | Sell | 10,664 | $323,684 |
Source: SEC Form 4 filings · as of 2026-08-18