MAETZOLD DEREK J Insider Trading -- Recent SEC Form 4 Transactions
MAETZOLD DEREK J (CIK 1239501) reported 223 SEC Form 4 insider transactions across 1 companies over the past 18 months (most recent 2026-10-07). Recent activity: Buy CSTL (8,165 shares), Sell CSTL (8,580 shares), Sell CSTL (3,198 shares), Sell CSTL (2,718 shares), Buy CSTL (8,580 shares). Source: SEC Form 4.
| Date | Company | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-10-07 | CASTLE BIOSCIENCES INC (CSTL) | Pres. & Chief Exec. Officer | Buy | 8,165 | $19,514 |
| 2026-10-07 | CASTLE BIOSCIENCES INC (CSTL) | Pres. & Chief Exec. Officer | Sell | 8,580 | $305,156 |
| 2026-10-07 | CASTLE BIOSCIENCES INC (CSTL) | Pres. & Chief Exec. Officer | Sell | 3,198 | $113,740 |
| 2026-10-07 | CASTLE BIOSCIENCES INC (CSTL) | Pres. & Chief Exec. Officer | Sell | 2,718 | $96,668 |
| 2026-09-23 | CASTLE BIOSCIENCES INC (CSTL) | Pres. & Chief Exec. Officer | Buy | 8,580 | $20,506 |
| 2026-09-23 | CASTLE BIOSCIENCES INC (CSTL) | Pres. & Chief Exec. Officer | Sell | 8,580 | $303,166 |
| 2026-09-23 | CASTLE BIOSCIENCES INC (CSTL) | Pres. & Chief Exec. Officer | Sell | 3,198 | $112,998 |
| 2026-09-23 | CASTLE BIOSCIENCES INC (CSTL) | Pres. & Chief Exec. Officer | Sell | 2,718 | $96,038 |
| 2026-09-15 | CASTLE BIOSCIENCES INC (CSTL) | Pres. & Chief Exec. Officer | Sell | 223 | $7,310 |
| 2026-09-15 | CASTLE BIOSCIENCES INC (CSTL) | Pres. & Chief Exec. Officer | Sell | 8,361 | $267,552 |
| 2026-09-15 | CASTLE BIOSCIENCES INC (CSTL) | Pres. & Chief Exec. Officer | Sell | 3,124 | $99,968 |
| 2026-09-15 | CASTLE BIOSCIENCES INC (CSTL) | Pres. & Chief Exec. Officer | Sell | 2,656 | $84,992 |
| 2026-09-15 | CASTLE BIOSCIENCES INC (CSTL) | Pres. & Chief Exec. Officer | Buy | 8,584 | $20,516 |
| 2026-09-15 | CASTLE BIOSCIENCES INC (CSTL) | Pres. & Chief Exec. Officer | Sell | 83 | $2,721 |
| 2026-09-15 | CASTLE BIOSCIENCES INC (CSTL) | Pres. & Chief Exec. Officer | Sell | 71 | $2,327 |
| 2026-09-01 | CASTLE BIOSCIENCES INC (CSTL) | Pres. & Chief Exec. Officer | Buy | 12,428 | $29,703 |
| 2026-09-01 | CASTLE BIOSCIENCES INC (CSTL) | Pres. & Chief Exec. Officer | Sell | 11,472 | $380,182 |
| 2026-09-01 | CASTLE BIOSCIENCES INC (CSTL) | Pres. & Chief Exec. Officer | Sell | 2,505 | $83,016 |
| 2026-09-01 | CASTLE BIOSCIENCES INC (CSTL) | Pres. & Chief Exec. Officer | Sell | 2,129 | $70,555 |
| 2026-09-01 | CASTLE BIOSCIENCES INC (CSTL) | Pres. & Chief Exec. Officer | Sell | 257 | $8,517 |
| 2026-09-01 | CASTLE BIOSCIENCES INC (CSTL) | Pres. & Chief Exec. Officer | Sell | 257 | $8,517 |
| 2026-09-01 | CASTLE BIOSCIENCES INC (CSTL) | Pres. & Chief Exec. Officer | Sell | 257 | $8,517 |
| 2026-09-01 | CASTLE BIOSCIENCES INC (CSTL) | Pres. & Chief Exec. Officer | Sell | 257 | $8,517 |
| 2026-09-01 | CASTLE BIOSCIENCES INC (CSTL) | Pres. & Chief Exec. Officer | Sell | 956 | $32,389 |
| 2026-09-01 | CASTLE BIOSCIENCES INC (CSTL) | Pres. & Chief Exec. Officer | Sell | 209 | $7,081 |
Source: SEC Form 4 filings · as of 2026-10-07