[Form 3] Lantheus Holdings, Inc Initial Statement of Beneficial Ownership

Rhea-AI Filing Summary

Form 3 for Lantheus Holdings (LNTH): Ludger Dinkelborg filed an Initial Statement of Beneficial Ownership reporting no ownership of common stock. The event date is 08/01/2025. Dinkelborg is identified as a Director and an Officer (Head of Research and Development). The filing includes Exhibit 24 (Power of Attorney) and was signed by attorney-in-fact Daniel Niedzwiecki on 08/18/2025.

Positive

• Initial Form 3 filing completed, meeting Section 16 disclosure requirements
• Reporting relationship disclosed: Director and Head of Research and Development
• Power of Attorney (Exhibit 24) included, indicating authorized signing by attorney-in-fact

Negative

• No common stock beneficially owned reported by the reporting person
• No derivative securities disclosed, so no disclosed equity stake or option alignment with shareholders

Insights

Securities Compliance Analyst

TL;DR: Initial disclosure filed showing no direct common-stock ownership; compliance filing completed.

This Form 3 records the required initial Section 16 disclosure for a reporting person joining insiders ranks. It documents the reporting person's roles and confirms no direct holdings or derivative positions in the issuer at the filing date. The inclusion of Exhibit 24 indicates authority was granted to an attorney-in-fact to sign.

Corporate Governance Expert

TL;DR: Officer and director role disclosed without equity ownership; governance interest exists but no skin in the game shown.

The filing notifies investors of Ludger Dinkelborg's governance and executive role (Head of Research and Development) while showing zero beneficial ownership. From a governance perspective, this is a routine disclosure that signals role responsibilities but does not provide evidence of equity alignment through ownership.

SEC Form 3

FORM 3

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

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person^*

Dinkelborg Ludger

(Last) (First) (Middle)

C/O LANTHEUS HOLDINGS, INC.

201 BURLINGTON ROAD, SOUTH BUILDING

(Street)

BEDFORD MA 01730

(City) (State) (Zip)

2. Date of Event Requiring Statement (Month/Day/Year)
08/01/2025

3. Issuer Name and Ticker or Trading Symbol
Lantheus Holdings, Inc. [ LNTH ]

4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	See Remarks

5. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Beneficially Owned
1. Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)
Common Stock	0	D

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

Remarks:

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

	/s/ Daniel Niedzwiecki, attorney-in-fact	08/18/2025
	** Signature of Reporting Person	Date
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 5 (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.

FAQ

What does the Form 3 for LNTH filed by Ludger Dinkelborg report?

It reports that Ludger Dinkelborg is a Director and Officer (Head of Research and Development) and holds 0 shares of Lantheus Holdings common stock as of the event date 08/01/2025.

When is the event date reported on the Form 3 for LNTH?

The event date is 08/01/2025 and the form was signed by attorney-in-fact on 08/18/2025.

Did the Form 3 for LNTH disclose any derivative securities or options?

No derivative securities, options, or convertible instruments are reported on the filing.

Who signed the Form 3 for Ludger Dinkelborg?

Daniel Niedzwiecki, acting as attorney-in-fact, signed the filing on 08/18/2025.

Is there a Power of Attorney attached to this Form 3?

Yes; Exhibit 24 (Power of Attorney) is listed in the filing.