Question 1

Who are the insiders buying Lantheus Holdings, Inc. stock?

Accepted Answer

InsiderAct tracks all open-market purchases of Lantheus Holdings, Inc. stock by corporate insiders — including officers, directors, and shareholders owning more than 10% — sourced from public SEC Form 4 filings.

Question 2

What does insider buying at a company mean?

Accepted Answer

When a corporate officer, director, or major shareholder purchases their own company's stock on the open market using personal funds, it signals confidence in the company's outlook. This is especially meaningful when multiple insiders buy within the same 7–14 day window (cluster buying) or when the purchase size exceeds $100,000.

Question 3

How do I find cluster buying signals for a company?

Accepted Answer

InsiderAct automatically detects cluster buying — two or more insiders independently purchasing shares within a 14-day window. When a cluster buy signal is active for a company, it appears prominently on the company's InsiderAct page and on the Signals tab.

Question 4

Has Lantheus Holdings, Inc. had any recent large insider purchases?

Accepted Answer

InsiderAct tracks all open-market purchases of $100,000 or more at Lantheus Holdings, Inc.. Large insider purchases are flagged as high-conviction signals because they represent meaningful personal capital commitments by executives or directors who have direct visibility into the company's operations and prospects.

Question 5

Where do the insider transactions on this page come from?

Accepted Answer

All transactions shown on InsiderAct company pages are sourced directly from SEC EDGAR Form 4 filings — the mandatory public disclosures that corporate insiders must submit within 2 business days of any stock transaction. InsiderAct ingests these filings in near real time and filters for open-market purchases and sales.


2026-03-09	2026-03-05	Niedzwiecki Daniel	See Remarks	Award	36,692	$0.00	$0
2026-03-09	2026-03-05	Niedzwiecki Daniel	See Remarks	Tax Payment	1,283	$76.31	$97,906
2026-03-09	2026-03-05	Dinkelborg Ludger	See Remarks	Award	20,966	$0.00	$0
2026-03-09	2026-03-05	Marshall Robert J. Jr.	CFO	Award	38,002	$0.00	$0
2026-03-09	2026-03-05	Marshall Robert J. Jr.	CFO	Tax Payment	1,182	$76.31	$90,198
2026-03-09	2026-03-05	Brown Kimberly	CAO	Tax Payment	133	$76.31	$10,149
2026-03-09	2026-03-05	Brown Kimberly	CAO	Award	6,158	$0.00	$0
2026-03-09	2026-03-05	Morgan Amanda Michelle	CCO	Award	26,208	$0.00	$0
2026-03-09	2026-03-05	Morgan Amanda Michelle	CCO	Tax Payment	595	$76.31	$45,404
2026-03-04	2026-03-02	Heino Mary Anne	CEO	Tax Payment	41,916	$76.30	$3,198,191

LNTH

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