Maetzold Derek J Insider Trades & Stock Holdings

Pres. & Chief Exec. Officer · Castle Biosciences, Inc. · Latest filing Oct 5, 2026

Maetzold Derek J, Pres. & Chief Exec. Officer at Castle Biosciences, Inc. has 2 Form 4 trades on file since Sep 21, 2026. Open-market activity: 0 purchases ($0) and 2 sales ($1.03M), net -$1.03M. Latest filing: disposed of 14.50K shares of $CSTL on Oct 5, 2026 at $35.57.

Trades on file

2

Open-market bought

$0

Open-market sold

$1.03M

Net open-market

-$1.03M

Latest filing

Oct 5, 2026

All insider trades by Maetzold Derek J

Date	Ticker	Type	Shares	Price	Value	Owned after	ΔOwn	1W	1M	6M	Role	Filing	Story
Oct 5, 2026	$CSTL	Sell (Open-market sale) 10b5-1	14.50K	$35.57	$515.56K			-10.6%			Pres. & Chief Exec. Officer		—
Sep 21, 2026	$CSTL	Sell (Open-market sale) 10b5-1	14.50K	$35.33	$512.20K			+2.7%			Pres. & Chief Exec. Officer		—

"Buy" means shares acquired on the Form 4 (including grants and option exercises); "Sell" means shares disposed. 1W / 1M / 6M = how the stock moved after the trade.

Stocks Maetzold Derek J traded

• $CSTL

Frequently asked questions

Has Maetzold Derek J been buying or selling stock?

Maetzold Derek J has 0 open-market purchases and 2 open-market sales on file, net -$1.03M. Grants, option exercises and tax withholding are listed separately because they are not open-market trades.

What was Maetzold Derek J's latest insider trade?

disposed of 14.50K shares of $CSTL on Oct 5, 2026 at $35.57.

Data comes from public SEC Form 4 and 13F filings and STOCK Act disclosures. Dates are the trade or filing date reported. This page is for research only and is not investment advice.