[Form 4] Lantheus Holdings, Inc. Insider Trading Activity

Rhea-AI Filing Summary

Lantheus Holdings, Inc. (LNTH)November 17, 2025, the reporting person received 14,285 restricted stock units that will vest in full on November 17, 2026. The filing shows direct ownership of 332,935 shares of common stock after this grant, plus additional indirect holdings through several trusts.

The insider also received a stock option covering 26,325 shares of Lantheus common stock with an exercise price of $52.50 per share. This option vests in full on November 17, 2026 and expires on November 17, 2035. Following this transaction, the reporting person beneficially owns 26,325 stock options in addition to the reported common stock positions.

11/19/2025 - 05:52 PM

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^*

Heino Mary Anne

(Last) (First) (Middle)

C/O LANTHEUS HOLDINGS, INC.

201 BURLINGTON ROAD, SOUTH BLDG

(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)

X	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Executive Chair

3. Date of Earliest Transaction (Month/Day/Year)
11/17/2025

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	11/17/2025		A(1)		14,285	A	$0	332,935	D
Common Stock								78,153	I	By The Mary Anne Fennell Heino Revocable Trust - 2018
Common Stock								8,618	I	By Heino Irrevocable Trust
Common Stock								179,300	I	By The Heino 2024 Family Trust

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
Stock Option (right to buy)	$52.5	11/17/2025		A		26,325		11/17/2026(2)	11/17/2035	Common Stock	26,325	$0	26,325	D

Explanation of Responses:

1. Consists of 14,285 restricted stock units that will vest in full on November 17, 2026.

2. The option vests in full on November 17, 2026.

	/s/ Eric M. Green, attorney-in-fact	11/19/2025
	** 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 Lantheus Holdings (LNTH) report on this Form 4?

The filing reports that a director and Executive Chair of Lantheus Holdings, Inc. (LNTH) received new equity awards, including restricted stock units and a stock option, on November 17, 2025.

How many restricted stock units were granted to the Lantheus (LNTH) insider?

The reporting person was granted 14,285 restricted stock units, which are scheduled to vest in full on November 17, 2026.

What are the details of the stock options granted in the Lantheus (LNTH) Form 4?

The insider received a stock option to purchase 26,325 shares of Lantheus common stock at an exercise price of $52.50 per share. The option vests in full on November 17, 2026 and expires on November 17, 2035.

What is the reporting persons common stock ownership in Lantheus (LNTH) after the transaction?

After the reported transactions, the insider directly owns 332,935 shares of Lantheus common stock and also holds additional shares indirectly through several trusts.

What indirect holdings in Lantheus (LNTH) common stock are disclosed?

The filing lists indirect ownership of 78,153 shares through The Mary Anne Fennell Heino Revocable Trust - 2018, 8,618 shares through the Heino Irrevocable Trust, and 179,300 shares through The Heino 2024 Family Trust.

What roles does the reporting person hold at Lantheus Holdings (LNTH)?

The reporting person is identified as both a Director and an Officer, with the title of Executive Chair of Lantheus Holdings, Inc.