[Form 4] Lantheus Holdings, Inc Insider Trading Activity

Rhea-AI Filing Summary

Kimberly Brown, Chief Accounting Officer of Lantheus Holdings, Inc. (LNTH), reported a sale of 463 shares of common stock at a price of $54.18 on 08/15/2025, leaving her with 7,701 shares beneficially owned on a direct basis. The Form 4 discloses this routine insider disposition executed under a transaction code indicating a sale.

Positive

• None.

Negative

• Officer sale disclosed: Chief Accounting Officer sold 463 shares at $54.18, reducing holdings to 7,701 shares (direct).

Insights

Financial Analyst

TL;DR: A small, routine officer share sale; not materially impactful to company valuation.

The reported sale of 463 shares by the Chief Accounting Officer represents a modest reduction in personal holdings relative to the total stake of 7,701 shares. The transaction price of $54.18 is presented as the executed sale price; no derivative activity or additional compensatory grants are disclosed. For investors, this appears to be a routine liquidity event rather than a signal of company-level changes.

Corporate Governance Expert

TL;DR: Compliance filing shows timely disclosure of an officer's open-market sale with direct ownership retained.

The Form 4 properly records the officer relationship and the direct nature of ownership post-transaction. There are no indicators in the filing of related-party transfers, option exercises, or Rule 10b5-1 plan markings. Disclosure completeness supports transparency but conveys no material governance concerns.

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^*

Brown Kimberly

(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)
	Chief Accounting Officer

3. Date of Earliest Transaction (Month/Day/Year)
08/15/2025

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	08/15/2025		F		463	D	$54.18	7,701	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	08/19/2025
	** 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 LNTH report for Kimberly Brown?

The Form 4 reports that Kimberly Brown sold 463 shares of Lantheus Holdings common stock at a price of $54.18.

How many LNTH shares does Kimberly Brown own after the reported sale?

Following the reported transaction, Kimberly Brown beneficially owns 7,701 shares on a direct basis.

What role does the reporting person hold at LNTH?

The reporting person is an Officer, specifically the Chief Accounting Officer of Lantheus Holdings.

Does the Form 4 show any derivative transactions or option exercises for Kimberly Brown?

No. Table II (derivative securities) contains no reported transactions; only a non-derivative common stock sale is disclosed.

Was the Form 4 filed jointly or by one reporting person?

The form indicates it was filed by one reporting person.