MAETZOLD DEREK J (Pres. & Chief Exec. Officer) sold 43.0% of their position (30.78K shares) of CASTLE BIOSCIENCES INC on the open market
Open‑market sale worth $792.4K — a major position exit. Review remaining holdings and any 10b5‑1 plan disclosures.
S · 3 sales
Filed: 3/17/2026ACC: 0001628280-26-018813
DirectorOfficer10% Owner· Pres. & Chief Exec. Officer
Since Jul 2019
-30.78K
Net shares
Net seller
$792.4K
Total sold
3
Open market trades
0B · 3S
3
Total transactions
30.78K disposed
Non-Derivative Transactions3
Common Stock
Direct
Shares
−13.20K
Price / share
$25.45
Trade value
$336K
% of position
18.5%
3/13/2026
71.56K→58.35K
Common Stock
Direct
Shares
−17.45K
Price / share
$25.96
Trade value
$453.05K
% of position
29.9%
3/16/2026
58.35K→40.91K
Common Stock
Direct
Shares
−126.00
Price / share
$26.68
Trade value
$3.36K
% of position
0.3%
3/16/2026
40.91K→40.78K
Total
Net shares
−30.78K
Net value
-$792.41K
| Security | Date | Type | Shares | Price / Share | Trade Value | % of Position | Held Before | Held After |
|---|---|---|---|---|---|---|---|---|
| Common Stock Direct | 3/13/2026 | S · Sale | −13.20K | $25.45 | $336K | 18.5% | 71.56K | 58.35K |
| Common Stock Direct | 3/16/2026 | S · Sale | −17.45K | $25.96 | $453.05K | 29.9% | 58.35K | 40.91K |
| Common Stock Direct | 3/16/2026 | S · Sale | −126.00 | $26.68 | $3.36K | 0.3% | 40.91K | 40.78K |
| Total | −30.78K | -$792.41K | ||||||
Derivative Transactions0
No derivative transactions reported
Non-Derivative Holdings (Post-Transaction)9
Common Stock
IndirectShares owned3.34K
Common Stock
IndirectShares owned3.34K
Common Stock
IndirectShares owned3.34K
Common Stock
IndirectShares owned43.83K
Common Stock
IndirectShares owned3.34K
Common Stock
IndirectShares owned51.57K
Common Stock
IndirectShares owned85.96K
Common Stock
IndirectShares owned44.32K
Common Stock
IndirectShares owned18.72K
Total
257.74K indirect257.74K
| Security Title | Shares Owned | Ownership Type |
|---|---|---|
| Common Stock | 3.34K | Indirect |
| Common Stock | 3.34K | Indirect |
| Common Stock | 3.34K | Indirect |
| Common Stock | 43.83K | Indirect |
| Common Stock | 3.34K | Indirect |
| Common Stock | 51.57K | Indirect |
| Common Stock | 85.96K | Indirect |
| Common Stock | 44.32K | Indirect |
| Common Stock | 18.72K | Indirect |
| Total | 257.74K | 257.74K indirect |
Derivative Holdings (Post-Transaction)0
No derivative holdings reported