[Form 4] Lantheus Holdings, Inc Insider Trading Activity

Rhea-AI Filing Summary

Lantheus Holdings insider report: Robert J. Marshall Jr., listed as CFO and Treasurer and an officer of Lantheus Holdings (LNTH), reported a transaction dated 08/29/2025 on Form 4. The filing shows 727 shares of common stock were disposed (transaction code F) at a price of $54.9 per share, leaving 88,133 shares beneficially owned following the transaction. The ownership is reported as direct. The form is signed by an attorney-in-fact on 09/03/2025.

Insights

Securities Analyst

TL;DR: Routine insider disposition reported by an officer leaving substantial direct holdings.

The Form 4 documents a single non-derivative transaction: 727 shares disposed at $54.90, leaving 88,133 shares directly beneficially owned by Robert J. Marshall Jr. This is a straightforward reporting of insider activity with no accompanying derivative activity or plan disclosures in the filing. The filing is informational and does not include additional context about reasons for the disposition.

Corporate Governance Expert

TL;DR: Standard insider reporting; signature executed by attorney-in-fact confirms procedural completion.

The document identifies the reporting person as an officer (CFO and Treasurer) and records a disposition coded 'F' for 727 shares at $54.90, with direct ownership of 88,133 shares after the transaction. The signature by an attorney-in-fact on 09/03/2025 indicates completion of the filing process. There are no amendments, derivative transactions, or plan-based purchases disclosed in this form.

SEC Form 4

FORM 4

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

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

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

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

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

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Marshall Robert J. Jr.

(Last) (First) (Middle)

C/O LANTHEUS HOLDINGS, INC.

201 BURLINGTON ROAD, SOUTH BUILDING

(Street)

BEDFORD MA 01730

(City) (State) (Zip)

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

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

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	CFO and Treasurer

3. Date of Earliest Transaction (Month/Day/Year)
08/29/2025

4. 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 Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	08/29/2025		F		727	D	$54.9	88,133	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

	/s/ Eric M. Green, attorney-in-fact	09/03/2025
	** 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 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.

FAQ

What insider transaction did Lantheus (LNTH) disclose on this Form 4?

The filing reports that Robert J. Marshall Jr. disposed of 727 shares of common stock on 08/29/2025 at a price of $54.9 per share.

How many shares does the reporting person own after the transaction?

The Form 4 shows 88,133 shares beneficially owned following the reported transaction.

What is the reporting person's role at Lantheus?

The filing lists Robert J. Marshall Jr. as an Officer with the titles CFO and Treasurer.

When was the Form 4 signed and who signed it?

The form bears a signature by Eric M. Green, attorney-in-fact dated 09/03/2025.

Does the Form 4 disclose any derivative transactions or option activity?

No. Table II for derivative securities contains no entries; only a non-derivative disposition is reported.