# EDGAR Filing Document

**Accession Number:** 0002082134
**File Stem:** 0001062993-25-014597
**Filing Date:** 2025-8
**Character Count:** 8151
**Document Hash:** 9847e899394a5e4c67c3e691aa87ecf2
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001062993-25-014597.hdr.sgml**: 20250818

**ACCESSION NUMBER**: 0001062993-25-014597

**CONFORMED SUBMISSION TYPE**: 3

**PUBLIC DOCUMENT COUNT**: 2

**CONFORMED PERIOD OF REPORT**: 20250801

**FILED AS OF DATE**: 20250818

**DATE AS OF CHANGE**: 20250818

**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** Dinkelborg Ludger
- **CENTRAL INDEX KEY:** 0002082134

**ORGANIZATION NAME:**

**FILING VALUES:**
- **FORM TYPE:** 3
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-36569
- **FILM NUMBER:** 251228901

**MAIL ADDRESS:**
- **STREET 1:** C/O LANTHEUS HOLDINGS, INC.
- **STREET 2:** 201 BURLINGTON RD, SOUTH BUILDING
- **CITY:** BEDFORD
- **STATE:** MA
- **ZIP:** 01730
**ISSUER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Lantheus Holdings, Inc.
- **CENTRAL INDEX KEY:** 0001521036
- **STANDARD INDUSTRIAL CLASSIFICATION:** IN VITRO & IN VIVO DIAGNOSTIC SUBSTANCES [2835]
- **ORGANIZATION NAME:** 03 Life Sciences
- **EIN:** 352318913
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**BUSINESS ADDRESS:**
- **STREET 1:** 331 TREBLE COVE ROAD
- **CITY:** NORTH BILLERICA
- **STATE:** MA
- **ZIP:** 01862
- **BUSINESS PHONE:** 978 671-8001

**MAIL ADDRESS:**
- **STREET 1:** 331 TREBLE COVE ROAD
- **CITY:** NORTH BILLERICA
- **STATE:** MA
- **ZIP:** 01862

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** Lantheus MI Holdings, Inc.
- **DATE OF NAME CHANGE:** 20110517

## Ex-24

```

Exhibit 24
LANTHEUS HOLDINGS, INC.
POWER OF ATTORNEY

Know all by these presents, that the undersigned hereby constitutes
and appoints Eric Green, Assistant Secretary of Lantheus Holdings, Inc.
(the "Company"), and each of the Chief Executive Officer, President,
Treasurer, each Assistant Treasurer, Secretary and each Assistant
Secretary of the Company, each acting singly or together and with full
power of substitution, as the undersigned's true and lawful
attorney-in-fact with full power and authority to act in the name of
and for and on behalf of the undersigned to:

	(1)	prepare, execute in the undersigned's name and on the
		undersigned's behalf, and submit to the U.S. Securities
		and Exchange Commission (the "SEC") a Form ID, including
		amendments thereto, and any other documents necessary
		or appropriate to obtain codes and passwords enabling the
		undersigned to make electronic filings with the SEC of
		reports required by Section 16(a) of the Securities
		Exchange Act of 1934 or any rule or regulation of the SEC;

	(2)	execute for and on behalf of the undersigned, in the
		undersigned's capacity as an officer and/or director of
		Company, Forms 3, 4 and 5 in accordance with Section 16(a)
		of the Securities Exchange Act of 1934 and the rules
		thereunder;

	(3)	do and perform any and all acts for and on behalf of the
		undersigned which may be necessary or desirable to obtain
		and maintain the undersigned's filings codes, complete
		and execute any such Form 3, 4 or 5, complete and execute
		any amendment or amendments thereto, and timely file such
		form with the SEC and any stock exchange or similar
		authority; and

	(4)	take any other action of any type whatsoever in connection
		with the foregoing which, in the opinion of such
		attorney-in-fact, may be of benefit to, in the best
		interest of, or legally required by or of, the undersigned,
		it being understood that the documents executed by such
		attorney-in-fact on behalf of the undersigned pursuant to
		this Power of Attorney shall be in such form and shall
		contain such terms and conditions as such
		attorney-in-fact may approve in such attorney-in-fact's
		discretion.

The undersigned hereby grants to each such attorney-in-fact full
power and authority to do and perform any and every act and thing whatsoever
requisite, necessary or proper to be done in the exercise of any of the
rights and powers herein granted, as fully to all intents and purposes as
the undersigned might or could do if personally present, with full power
of substitution or revocation, hereby ratifying and confirming all that
such attorney-in-fact, or such attorney-in-fact's substitute or
substitutes, shall lawfully do or cause to be done by virtue of this
power of attorney and the rights and powers herein granted.
The undersigned acknowledges that the foregoing attorneys-in-fact, in
serving in such capacity at the request of the undersigned, are not
assuming, nor is the Company assuming, any of the undersigned's
responsibilities to comply with Section 16 of the Securities
Exchange Act of 1934.

This Power of Attorney shall remain in full force and effect
until the undersigned is no longer required to file Forms 3,
4 and 5 with respect to the undersigned's holdings of, and transactions
in, securities issued by the Company, unless earlier revoked by the
undersigned in a signed writing delivered to the foregoing
attorneys-in-fact.

[The remainder of this page is left blank intentionally.]

IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney
to be executed as of the date written below.

/s/ Ludger Dinkelborg
Signature

Ludger Dinkelborg
Print Name

7/30/2025
Date

```

### UNITED STATES SECURITIES AND EXCHANGE COMMISSION
**Washington, D.C. 20549**

## FORM 3

### INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

[ ] Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

---

| | | |
|:---|:---|:---|
| **1. Name and Address of Reporting Person**<sup>*</sup><br>Dinkelborg Ludger<br><sub>(Last) (First) (Middle)</sub><br>C/O LANTHEUS HOLDINGS, INC.<br>201 BURLINGTON ROAD, SOUTH BUILDING<br><sub>(Street)</sub><br>BEDFORD, MA 01730<br><sub>(City) (State) (Zip)</sub> | **3. Issuer Name and Ticker or Trading Symbol**<br>Lantheus Holdings, Inc. [ LNTH ] | **5. If Amendment, Date of Original Filed (Month/Day/Year)**<br>  |
| **2. Date of Event Requiring Statement (Month/Day/Year)**<br>2025-08-01 | **4. Relationship of Reporting Person(s) to Issuer**<br>(Check all applicable)<br>[ ] Director   [ ] 10% Owner<br>[X] Officer (give title below)   [ ] Other (specify below)<br>_See Remarks_ | **6. Individual or Joint/Group Filing (Check Applicable Line)**<br>[X] Form filed by One Reporting Person<br>[ ] Form filed by More than One Reporting Person |

---

## Table I - Non-Derivative Securities Beneficially Owned

---

|  |  |  |  |
| --- | --- | --- | --- |
| 1. Title of Security | 2. Amount of Securities Beneficially Owned | 3. Ownership Form | 4. Nature of Indirect Beneficial Ownership |
| Common Stock | 0 | D |  |

---

## Table II - Derivative Securities Beneficially Owned

---

|  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Derivative Security | 2. Date Exercisable and Expiration Date (Month/Day/Year) | 2. Date Exercisable and Expiration Date (Month/Day/Year) | 3. Title and Amount of Underlying Securities | 3. Title and Amount of Underlying Securities | 4. Conversion or Exercise Price | 5. Ownership Form | 6. Nature of Indirect Beneficial Ownership |
| 1. Title of Derivative Security | Date Exercisable | Expiration Date | Title | Amount or Number of Shares | 4. Conversion or Exercise Price | 5. Ownership Form | 6. Nature of Indirect Beneficial Ownership |
|  |  |  |  |  |  |  |  |

---

**Remarks:**
Head of Research and Development; Exhibit List: Exhibit 24 - Power of Attorney

**Signature:** /s/ Daniel Niedzwiecki, attorney-in-fact  
**Date:** 2025-08-18

### Remarks:

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).

** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).

Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.

**Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.**