MAETZOLD DEREK J
SEC insider (Form 3/4/5 filer). CIK 0001239501. Pres. & Chief Exec. Officer at CASTLE BIOSCIENCES INC (CSTL). 443 reported Form 4/5 transactions since Sep 2024; latest on Oct 19, 2026. Located in FRIENDSWOOD, TX.
Companies MAETZOLD DEREK J has filed insider reports for
- CASTLE BIOSCIENCES INC (CSTL): Director, Officer, Pres. & Chief Exec. Officer
MAETZOLD DEREK J
CIK: 0001239501
Transaction Breakdown
High conviction signal
Position reduction
Derivative conversions
Compensation grants
Gifts, tax withholding, conversions, dispositions to the issuer and other codes
Companies & Roles (1)
CASTLE BIOSCIENCES INC
Discretionary Trading P&L
Holdings
Transaction History (443 total)
- Oct 19, 2026CSTL
CASTLE BIOSCIENCES INC
SaleDirect8.6K shares at avg. $31.91$274K - Oct 19, 2026CSTL
CASTLE BIOSCIENCES INC
SaleIndirect3.2K shares at avg. $31.91$102K - Oct 19, 2026CSTL
CASTLE BIOSCIENCES INC
SaleIndirect2.7K shares at avg. $31.91$87K - Oct 5, 2026CSTL
CASTLE BIOSCIENCES INC
SaleDirect8.6K shares at avg. $35.57$305K - Oct 5, 2026CSTL
CASTLE BIOSCIENCES INC
SaleIndirect2.7K shares at avg. $35.57$97K - Oct 5, 2026CSTL
CASTLE BIOSCIENCES INC
SaleIndirect3.2K shares at avg. $35.57$114K - Oct 5, 2026CSTL
CASTLE BIOSCIENCES INC
ExerciseDirect8.2K shares at avg. $2.39$20K - Sep 21, 2026CSTL
CASTLE BIOSCIENCES INC
SaleIndirect2.7K shares at avg. $35.33$96K - Sep 21, 2026CSTL
CASTLE BIOSCIENCES INC
ExerciseDirect8.6K shares at avg. $2.39$21K - Sep 21, 2026CSTL
CASTLE BIOSCIENCES INC
SaleDirect8.6K shares at avg. $35.33$303K
| Type | Shares | Price | Ownership | |||
|---|---|---|---|---|---|---|
| Oct 19, 2026 | CSTL CASTLE BIOSCIENCES INC | Sale | 8,580 | $31.91 | $273,788 | Direct |
| Oct 19, 2026 | CSTL CASTLE BIOSCIENCES INC | Sale | 3,198 | $31.91 | $102,048 | Indirect |
| Oct 19, 2026 | CSTL CASTLE BIOSCIENCES INC | Sale | 2,718 | $31.91 | $86,731 | Indirect |
| Oct 5, 2026 | CSTL CASTLE BIOSCIENCES INC | Sale | 8,580 | $35.57 | $305,156 | Direct |
| Oct 5, 2026 | CSTL CASTLE BIOSCIENCES INC | Sale | 2,718 | $35.57 | $96,668 | Indirect |
| Oct 5, 2026 | CSTL CASTLE BIOSCIENCES INC | Sale | 3,198 | $35.57 | $113,740 | Indirect |
| Oct 5, 2026 | CSTL CASTLE BIOSCIENCES INC | Exercise | 8,165 | $2.39 | $19,514 | Direct |
| Sep 21, 2026 | CSTL CASTLE BIOSCIENCES INC | Sale | 2,718 | $35.33 | $96,038 | Indirect |
| Sep 21, 2026 | CSTL CASTLE BIOSCIENCES INC | Exercise | 8,580 | $2.39 | $20,506 | Direct |
| Sep 21, 2026 | CSTL CASTLE BIOSCIENCES INC | Sale | 8,580 | $35.33 | $303,166 | Direct |
1-10 of 443 transactions