Derek J Maetzold sold $1.2M of Castle Biosciences (CSTL)

Executed Dec 15 2025, disclosed Dec 17 2025, 2 days later.

Value, as filed

$1.2M

31,334 sh across 2 lots

Executed

Dec 15 2025

the trade date, as filed

Disclosed

Dec 17 2025

2 days after the trade

Return, 21 sessionsiFrom the disclosed entry session; derived

–

purchases only

Returns are measured on stock purchases only.

The filer

Derek J Maetzold Pres. & Chief Exec. Officer profile →

Derek J Maetzold (Pres. & Chief Exec. Officer) filed 22 Form 4 reports in the trailing twelve months (0 purchases, 22 sales), most often in Castle Biosciences, Inc. (CSTL). The largest single filing was $1.2M of CSTL (31,334 sh across 2 lots, as filed), executed Dec 15 2025.

The name

CSTL

Castle Biosciences, Inc. CSTL · Healthcare · 59 filings in 24 months ticker →

Healthcare · Castle Biosciences, Inc., a molecular diagnostics company, provides test solutions for the diagnosis and treatment of dermatologic cancers,…

More Healthcare filings→ Insider filings, newest first→ View the original filing at www.sec.gov→

Other filings by Derek J Maetzold in CSTL

CSTLSALE Castle Biosciences, Inc. $373K
10,371 sh across 2 lots
Exec Nov 2
Filed Nov 4 · 4:07 PM ET CSTLSALE Castle Biosciences, Inc. $376K
11,778 sh across 2 lots
Exec Oct 19
Filed Oct 21 · 4:18 PM ET CSTLSALE Castle Biosciences, Inc. $419K
11,778 sh across 2 lots
Exec Oct 5
Filed Oct 7 · 4:10 PM ET CSTLSALE Castle Biosciences, Inc. $416K
11,778 sh across 2 lots
Exec Sep 21
Filed Sep 23 · 4:27 PM ET CSTLSALE Castle Biosciences, Inc. $268K
8,361 sh × $32.00
Exec Sep 11
Filed Sep 15 · 4:08 PM ET CSTLSALE Castle Biosciences, Inc. $1.0M
32,575 sh across 5 lots
Exec Aug 4
Filed Aug 6 · 4:14 PM ET CSTLSALE Castle Biosciences, Inc. $757K
24,973 sh across 4 lots
Exec Jul 31
Filed Aug 4 · 4:35 PM ET CSTLSALE Castle Biosciences, Inc. $144K
5,982 sh × $24.13
Exec Jul 27
Filed Jul 29 · 4:09 PM ET