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

Role: Chief Accounting Officer
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, 17:05:17 UTC
Previous filing: 19 Aug 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Brown Kimberly	Chief Accounting Officer	C/O LANTHEUS HOLDINGS, INC., 201 BURLINGTON ROAD, SOUTH BUILDING, BEDFORD	/s/ Eric M. Green, attorney-in-fact	09 Mar 2026	0002033488

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	LNTH	Common Stock	Award		+6,158	+80%	$0.000000^*	13,859	05 Mar 2026	Direct	F1
transaction	LNTH	Common Stock	Tax liability		-133	-0.96%	$76.31^*	13,726	05 Mar 2026	Direct

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

Explanation of Responses:

Id	Content
F1	Consists of 3,079 restricted stock units that vest in equal installments over a three-year period and 3,079 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 3,079 restricted stock units that vest in equal installments over a three-year period and 3,079 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.