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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1521036	Lantheus Holdings Inc.	LNTH	In Vitro & In Vivo Diagnostic Substances (2835)	352318913

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1610676	Anne Mary Heino	C/O Lantheus Holdings, Inc. 201 Burlington Road, South Bldg Bedford MA 01730		Yes	No	No	No

Transaction Summary

Sold:	26,066 shares	Avg. Price: $76.83	Total Value: $2,002,570.46
Number of Shares After Transactions:	318,650 shares

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
Common Stock	Disposition	2025-06-02	3,140	$74.90	341,576	No	4	S	Direct
Common Stock	Disposition	2025-06-02	22,926	$77.09	318,650	No	4	S	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	S	Direct
No	4	S	Direct

Reported Non-Derivative Holdings

Sec. Name	Remaning Holdings	Nature of Ownership	Explanation
Common Stock	37,719	Indirect	By Grantor Retained Annuity Trust
Common Stock	40,434	Indirect	By The Mary Anne Fennell Heino Revocable Trust - 2018
Common Stock	8,618	Indirect	By Heino Irrevocable Trust
Common Stock	179,300	Indirect	By The Heino 2024 Family Trust

Footnotes

The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on March 3, 2025.
The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $74.40 to $75.35, inclusive. The reporting person undertakes to provide to Lantheus Holdings, Inc. ("LNTH"), any security holder of LNTH or the staff of the Securities and Exchange Commission ("SEC"), upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote (2) to this Form 4.
The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $76.64 to $77.59, inclusive. The reporting person undertakes to provide to LNTH, any security holder of LNTH or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote (3) to this Form 4.