Lantheus (NASDAQ: LNTH) CCO logs PSU vesting, tax withholding

Rhea-AI Filing Summary

Lantheus Holdings Chief Commercial Officer Amanda Michelle Morgan reported performance-based stock vesting and related tax share withholding. She acquired 2,782 shares of common stock at no cost from relative total shareholder return PSUs that vested above target. According to the footnote, these PSUs ultimately vested at 162.8% of the target number of shares, so this grant represents the additional shares above the original target previously reported.

On the same date, 3,336 shares of common stock were disposed of at $76.30 per share in a tax-withholding transaction to cover obligations arising from the vesting, rather than an open-market sale. After these transactions, Morgan directly holds 38,540 shares of Lantheus common stock.

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^*

Morgan Amanda Michelle

(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 Commercial Officer

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)		2,782	A	$0	41,876	D
Common Stock	03/02/2026		F		3,336	D	$76.3	38,540	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 3 filed upon the reporting person becoming a Section 16 officer. The number of shares reported in the Form 3 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 3.

	/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.
* 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 transactions did Lantheus (LNTH) report for Amanda Michelle Morgan?

Amanda Michelle Morgan reported a PSU-related stock award and a tax-withholding share disposition. She received 2,782 common shares at no cost from performance-based PSUs and had 3,336 shares withheld at $76.30 to cover taxes from the vesting.

How many Lantheus (LNTH) shares does Amanda Michelle Morgan hold after this Form 4?

After the reported Form 4 transactions, Amanda Michelle Morgan directly holds 38,540 shares of Lantheus common stock. This reflects the net effect of additional PSU vesting shares received and shares withheld to satisfy tax obligations tied to the performance-based award.

What triggered the new share award for Lantheus (LNTH) CCO Amanda Michelle Morgan?

The new share award was triggered by vesting of relative total shareholder return PSUs. These PSUs vested at 162.8% of the target number of shares, resulting in 2,782 additional Lantheus common shares issued beyond the original target reported on her earlier Form 3.

Was the share disposition by Lantheus (LNTH) CCO an open-market sale?

No, the disposition was a tax-withholding transaction, not an open-market sale. 3,336 Lantheus common shares were delivered at $76.30 per share to cover tax liabilities associated with the vesting of previously granted performance-based restricted stock units.

How were the PSUs for Lantheus (LNTH) CCO Amanda Michelle Morgan structured?

The PSUs were based on relative total shareholder return performance. The original Form 3 reflected 100% of the target shares, but actual vesting reached 162.8% of target, so this Form 4 reports only the incremental shares above that original target amount.