MAETZOLD DEREK J

Corporate insiderPres. & Chief Exec. OfficerOpen-market Form 4 activity · 1 Jul 2026 – 21 Sept 2026

Transactions

0 buys · 30 sells

Bought

Open-market purchases

Sold

$3.7M

Open-market sales

Stocks

Traded

★ Trade spotlightCSTLCASTLE BIOSCIENCES INCThe latest-traded stock and its 1Y chart are free

● buy● sell

Loading price history…

All transactions

30 trades in the recent window · 1 grouped rows

	Stock	Trades	Bought	Sold	Latest
	CSTL CASTLE BIOSCIENCES INC	30 0 buys · 30 sells	—	$3.7M	21 Sept 2026

▸CSTLCASTLE BIOSCIENCES INC

30 trades · latest 21 Sept 2026— / $3.7M