Ludger Dinkelborg - 05 Mar 2026 Form 4 Insider Report for Lantheus Holdings, Inc. (LNTH)

Role: Head of Research and Development
Signature: /s/ Eric M. Green, attorney-in-fact
Issuer symbol: LNTH
Transactions as of: 05 Mar 2026
Net transactions value: $0
Form type: 4
Filing time: 09 Mar 2026, 17:05:49 UTC
Previous filing: 19 Aug 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Dinkelborg Ludger	Head of Research and Development	C/O LANTHEUS HOLDINGS, INC., 201 BURLINGTON ROAD, SOUTH BUILDING, BEDFORD	/s/ Eric M. Green, attorney-in-fact	09 Mar 2026	0002082134

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	LNTH	Common Stock	Award		+20,966	+142%	$0.000000^*	35,731	05 Mar 2026	Direct	F1

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	Consists of 10,483 restricted stock units that vest in equal installments over a three-year period and 10,483 Total Shareholder Return performance-based restricted stock units ("PSUs") that cliff vest following a three-year performance period. The amount of PSUs included in this Report reflects the target award; however, the ultimate award size can range from 0% to 200% of the target based on the actual performance achieved at the end of the performance period.

Content

Consists of 10,483 restricted stock units that vest in equal installments over a three-year period and 10,483 Total Shareholder Return performance-based restricted stock units ("PSUs") that cliff vest following a three-year performance period. The amount of PSUs included in this Report reflects the target award; however, the ultimate award size can range from 0% to 200% of the target based on the actual performance achieved at the end of the performance period.

Remarks:

Head of Research and Development