Insider Trading

Current insider transactions (SEC Form 4) — buys and sells by officers, directors, and major shareholders.

A compact market overview — not investment advice. Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q).
Ticker	Insider	Title	Date	Transaction	Price ($)	Shares	Value ($)	SEC Form 4
CSTL	Maetzold Derek J	Pres. & Chief Exec. Officer	07/27/2026	Verkauf	25.06	10	251	Form 4
CSTL	Maetzold Derek J	Pres. & Chief Exec. Officer	07/27/2026	Verkauf	25.06	43	1,078	Form 4
CSTL	Maetzold Derek J	Pres. & Chief Exec. Officer	07/27/2026	Verkauf	25.06	50	1,253	Form 4
CSTL	Maetzold Derek J	Pres. & Chief Exec. Officer	07/27/2026	Verkauf	25.06	232	5,814	Form 4
CSTL	Maetzold Derek J	Pres. & Chief Exec. Officer	07/27/2026	Verkauf	24.13	268	6,467	Form 4
CSTL	Maetzold Derek J	Pres. & Chief Exec. Officer	07/27/2026	Verkauf	24.13	1,110	26,784	Form 4
CSTL	Maetzold Derek J	Pres. & Chief Exec. Officer	07/27/2026	Verkauf	24.13	1,307	31,538	Form 4
CSTL	Maetzold Derek J	Pres. & Chief Exec. Officer	07/27/2026	Verkauf	24.13	5,982	144,346	Form 4
CSTL	Maetzold Derek J	Pres. & Chief Exec. Officer	07/27/2026	Optionsausübung	2.39	6,214	14,851	Form 4
CSTL	Maetzold Derek J	Pres. & Chief Exec. Officer	07/14/2026	Verkauf	22.92	278	6,372	Form 4
CSTL	Maetzold Derek J	Pres. & Chief Exec. Officer	07/14/2026	Verkauf	22.92	1,153	26,427	Form 4
CSTL	Maetzold Derek J	Pres. & Chief Exec. Officer	07/14/2026	Verkauf	22.92	1,357	31,102	Form 4
CSTL	Maetzold Derek J	Pres. & Chief Exec. Officer	07/14/2026	Verkauf	22.92	550	12,606	Form 4
CSTL	Maetzold Derek J	Pres. & Chief Exec. Officer	07/14/2026	Optionsausübung	2.39	550	1,315	Form 4
CSTL	Derek J Maetzold	Insider	04/21/2026	Verkauf	25.10	550	13,805	Form 4
CSTL	Derek J Maetzold	Insider	04/21/2026	Verkauf	25.10	3,622	90,912	Form 4

A compact market overview — not investment advice. Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q).

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