Lantheus CFO uses 721 shares for exercise or taxes

Lantheus Holdings’ CFO used 721 shares to cover option exercise price or tax obligations, leaving him with 122,071 shares directly held.

Rhea-AI Filing Summary

Lantheus Holdings, Inc. (LNTH) reported that its Chief Financial Officer and Treasurer, Robert J. Marshall Jr., had 721 shares of common stock disposed of on August 31, 2026, as a payment of exercise price or tax liability by delivering or withholding securities at a reported price of $100.96 per share. Following this transaction, he directly held 122,071 shares of Lantheus common stock.

Insider Trade Summary

Exercise Price or Tax Liability: 721 shares

Exercise Price or Tax Liability 1 txn

Insider Marshall Robert J. Jr.

Role CFO and Treasurer

Type	Security	Shares	Price	Value
Exercise Price or Tax Liability	Common Stock	721	$100.96	$73K

Holdings After Transaction: Common Stock — 122,071 shares (Direct)

Key Figures

Shares delivered/withheld: 721 shares Reported price per share: $100.96 per share Shares held after transaction: 122,071 shares +1 more

4 metrics

Shares delivered/withheld 721 shares Common stock used on August 31, 2026 for payment of exercise price or tax liability

Reported price per share $100.96 per share Value applied to the 721-share disposition on August 31, 2026

Shares held after transaction 122,071 shares Direct holdings of the CFO and Treasurer following the August 31, 2026 transaction

Exercise/tax-liability shares count 721 shares Total shares reported as delivered or withheld for exercise price or tax liability in this Form 4

Key Terms

Payment of exercise price or tax liability by delivering or withholding securities, Common Stock, directly held

3 terms

Payment of exercise price or tax liability by delivering or withholding securities financial

"Transaction coded as payment of exercise price or tax liability by delivering or withholding securities"

Common Stock financial

"Transaction involves Common Stock of Lantheus Holdings, Inc."

Common stock represents ownership shares in a company, giving investors a stake in its success and a say in important decisions through voting rights. It is the most common type of stock traded on markets and can provide income through dividends, as well as potential for value growth. For investors, holding common stock means sharing in the company’s profits and risks.

directly held financial

"Following this transaction, he directly held 122,071 shares"

FAQ

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

Lantheus Holdings disclosed that its CFO and Treasurer, Robert J. Marshall Jr., had 721 shares of common stock disposed of on August 31, 2026 to pay an exercise price or tax liability by delivering or withholding securities.

At what price were the Lantheus (LNTH) shares used for the tax or exercise payment?

The 721 Lantheus common shares were reported at $100.96 per share in connection with the payment of an exercise price or tax liability by delivering or withholding securities.

How many Lantheus (LNTH) shares does the CFO hold after this reported transaction?

After the August 31, 2026 transaction, CFO and Treasurer Robert J. Marshall Jr. directly held 122,071 shares of Lantheus common stock.

Was the Lantheus (LNTH) CFO’s Form 4 transaction a market sale?

No. The transaction is coded as “Payment of exercise price or tax liability by delivering or withholding securities”, indicating shares were used to cover obligations rather than being sold in an open-market trade.

Does the Form 4 indicate a Rule 10b5-1 trading plan for the Lantheus (LNTH) CFO?

No. The filing indicates that no Rule 10b5-1 trading plan is affirmed for this transaction.

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Available on EDGAR 09/02/2026 - 04:36 PM Accepted by SEC EDGAR 09/02/2026 - 04:35 PM Learn about SEC filing dates

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 MASSACHUSETTS 01730

(City) (State) (Zip)

UNITED STATES

(Country)

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
08/31/2026

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

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

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

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	08/31/2026		F		721	D	$100.96	122,071	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	09/02/2026
	** 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.
* Form 4: SEC 1474 (03-26)