Derek J Maetzold sold $839K of Castle Biosciences (CSTL)

Executed Aug 13 2025, disclosed Aug 15 2025, 2 days later.

Value, as filed

$839K

43,019 sh × $19.50

Executed

Aug 13 2025

the trade date, as filed

Disclosed

Aug 15 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 19 Form 4 reports in the trailing twelve months (0 purchases, 19 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 · 53 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. $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 CSTLSALE Castle Biosciences, Inc. $151K
6,214 sh × $24.29
Exec Jul 1
Filed Jul 6 · 4:25 PM ET CSTLSALE Castle Biosciences, Inc. $130K
6,214 sh × $20.86
Exec Jun 1
Filed Jun 3 · 5:30 PM ET CSTLSALE Castle Biosciences, Inc. $117K
5,308 sh × $22.08
Exec May 7
Filed May 11 · 5:30 PM ET CSTLSALE Castle Biosciences, Inc. $156K
6,214 sh × $25.03
Exec Apr 6
Filed Apr 8 · 5:30 PM ET