MAETZOLD DEREK J (Pres. & Chief Exec. Officer) sold 77.9% of their position (14.50K shares) of CASTLE BIOSCIENCES INC on the open market
Open‑market sale worth $462.6K — a major position exit. Review remaining holdings and any 10b5‑1 plan disclosures.
S · 3 sales
Filed: 10/21/2026ACC: 0001628280-26-066724
DirectorOfficer10% Owner· Pres. & Chief Exec. Officer
Since Jul 2019
-14.50K
Net shares
Net seller
$462.6K
Total sold
3
Open market trades
0B · 3S
3
Total transactions
14.50K disposed
Non-Derivative Transactions3
Common Stock
Direct
Shares
−8.58K
Price / share
$31.91
Trade value
$273.79K
% of position
40.7%
10/19/2026
21.06K→12.48K
Common Stock
Indirect
Shares
−3.20K
Price / share
$31.91
Trade value
$102.05K
% of position
39.8%
10/19/2026
8.04K→4.84K
Common Stock
Indirect
Shares
−2.72K
Price / share
$31.91
Trade value
$86.73K
% of position
39.8%
10/19/2026
6.83K→4.11K
Total
Net shares
−14.50K
Net value
-$462.57K
| Security | Date | Type | Shares | Price / Share | Trade Value | % of Position | Held Before | Held After |
|---|---|---|---|---|---|---|---|---|
| Common Stock Direct | 10/19/2026 | S · Sale | −8.58K | $31.91 | $273.79K | 40.7% | 21.06K | 12.48K |
| Common Stock Indirect | 10/19/2026 | S · Sale | −3.20K | $31.91 | $102.05K | 39.8% | 8.04K | 4.84K |
| Common Stock Indirect | 10/19/2026 | S · Sale | −2.72K | $31.91 | $86.73K | 39.8% | 6.83K | 4.11K |
| Total | −14.50K | -$462.57K | ||||||
Derivative Transactions0
No derivative transactions reported
Non-Derivative Holdings (Post-Transaction)8
Common Stock
IndirectShares owned40.94K
Common Stock
IndirectShares owned11.96K
Common Stock
IndirectShares owned23.22K
Common Stock
IndirectShares owned11.26K
Common Stock
IndirectShares owned11.26K
Common Stock
IndirectShares owned11.26K
Common Stock
IndirectShares owned27.86K
Common Stock
IndirectShares owned11.26K
Total
149K indirect149K
| Security Title | Shares Owned | Ownership Type |
|---|---|---|
| Common Stock | 40.94K | Indirect |
| Common Stock | 11.96K | Indirect |
| Common Stock | 23.22K | Indirect |
| Common Stock | 11.26K | Indirect |
| Common Stock | 11.26K | Indirect |
| Common Stock | 11.26K | Indirect |
| Common Stock | 27.86K | Indirect |
| Common Stock | 11.26K | Indirect |
| Total | 149K | 149K indirect |
Derivative Holdings (Post-Transaction)0
No derivative holdings reported