Lantheus Holdings (LNTH) CFO nets PSU award, withholds shares for taxes

Rhea-AI Filing Summary

Lantheus Holdings CFO and Treasurer Robert J. Marshall Jr. reported two common stock transactions on March 2, 2026. He acquired 8,491 shares at $0.00 per share as a grant or award, increasing his direct holdings to 96,624 shares.

On the same date, he disposed of 10,652 shares of common stock at $76.30 per share in a tax-withholding transaction to cover obligations arising from equity awards, leaving him with 85,972 directly held shares. A footnote explains that the additional shares issued resulted from performance-based PSUs that vested at 162.8% of their target.

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

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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)
03/02/2026

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	03/02/2026		A(1)		8,491	A	$0	96,624	D
Common Stock	03/02/2026		F		10,652	D	$76.3	85,972	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:

1. The transaction reported in this Form 4 reflects additional shares of common stock issued by Lantheus Holdings, Inc. to the reporting person upon the vesting of relative Total Shareholder Return performance-based restricted stock units ("PSUs") that were previously granted and included in the Form 4 filed on March 6, 2023. The number of shares reported in the Form 4 reflected 100% of the target number of shares underlying the PSUs. The number of shares that actually vested under the PSUs equaled 162.8% of the target number of shares. Accordingly, the number of shares reported in this Form 4 reflects the difference between the number of shares that actually vested under the PSUs and the target number of shares originally included in the Form 4.

	/s/ Eric M. Green, attorney-in-fact	03/04/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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FAQ

What insider transactions did Lantheus (LNTH) report for its CFO?

Lantheus reported that CFO and Treasurer Robert J. Marshall Jr. received 8,491 common shares as a grant and disposed of 10,652 shares to cover tax obligations. Both transactions occurred on March 2, 2026 and involved directly held common stock.

Were Lantheus (LNTH) CFO’s March 2, 2026 transactions open-market sales?

The filing describes the 10,652-share disposition as a tax-withholding transaction, not an open-market sale. Shares were delivered to satisfy exercise price or tax liabilities arising from equity awards, according to the transaction code F description.

Why did Lantheus (LNTH) issue additional shares to its CFO from PSUs?

A footnote explains that relative Total Shareholder Return PSUs previously granted vested at 162.8% of their target. The 8,491 shares reported represent the difference between the actual vested shares and the target amount initially reported in a prior Form 4.

How many Lantheus (LNTH) shares does the CFO hold after these Form 4 transactions?

After the grant and tax-withholding disposition on March 2, 2026, CFO and Treasurer Robert J. Marshall Jr. directly holds 85,972 shares of Lantheus Holdings common stock, as reported in the post-transaction ownership fields.

What do the A and F transaction codes mean in the Lantheus (LNTH) Form 4?

Code A indicates an acquisition through a grant, award, or similar method, used for the 8,491-share award. Code F indicates a disposition of 10,652 shares to pay exercise price or tax liabilities by delivering securities, per the filing’s transaction descriptions.