Lantheus (LNTH) Form 4: Head of R&D granted RSUs and 25,324‑share option

Rhea-AI Filing Summary

Ludger Dinkelborg, Head of Research and Development at Lantheus Holdings, Inc. (LNTH), reported equity awards dated 08/15/2025. The filing shows acquisition of 14,765 restricted stock units (RSUs) that vest in equal installments over a three-year period and a stock option covering 25,324 shares with an exercise price of $54.18. The option vests in three equal annual installments beginning 08/15/2026 and expires 08/15/2035. Following the reported transactions the reporting person beneficially owned 14,765 shares of common stock and had 25,324 option shares outstanding. The form was signed by an attorney-in-fact on 08/19/2025.

Positive

• Officer received time‑based equity awards (14,765 RSUs and a 25,324‑share option) which align management incentives with shareholders
• Clear vesting schedules disclosed: RSUs vest over three years; option vests in three equal annual installments starting 08/15/2026

Negative

• None.

Insights

Financial Analyst

TL;DR: Insider granted equity awards increase management's stake but are standard time-based compensation.

The reported awards consist of 14,765 RSUs and a 25,324-share option at a $54.18 exercise price. Time-based vesting over three years for RSUs and annual vesting starting in 2026 for the option indicate retention-focused compensation rather than immediate liquidity events. These grants are dilutive in principle but appear structured to align executive incentives with long-term share performance. No cash proceeds were reported from the RSUs; the option shows standard long-term expiry to 2035.

Corporate Governance Expert

TL;DR: Governance signal: officer-director received routine equity awards with multi-year vesting to promote retention.

The filing identifies the reporting person as both an officer and a director and discloses detailed vesting schedules: RSUs vest evenly over three years and the option vests in three equal annual installments beginning 08/15/2026. These features are consistent with best practices for aligning executive and shareholder interests through time-based incentives. The form is properly executed by an attorney-in-fact, meeting procedural requirements for Section 16 reporting.

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^*

Dinkelborg Ludger

(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)
	See Remarks

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		A(1)		14,765	A	$0	14,765	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
Stock Option (right to buy)	$54.18	08/15/2025		A		25,324		(2)	08/15/2035	Common Stock	25,324	$0	25,324	D

Explanation of Responses:

1. Consists of 14,765 restricted stock units that vest in equal installments over a three-year period.

2. The option vests in three equal annual installments beginning on August 15, 2026.

Remarks:

Head of Research and Development

	/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 equity did Ludger Dinkelborg receive according to the LNTH Form 4?

He acquired 14,765 restricted stock units (RSUs) and was granted a stock option for 25,324 shares with an exercise price of $54.18.

When do the RSUs and options vest for the LNTH reporting person?

The RSUs vest in equal installments over three years. The option vests in three equal annual installments beginning 08/15/2026.

What is the option expiration date reported on the LNTH Form 4?

The option expires on 08/15/2035 as stated in the filing.

How many shares did the reporting person beneficially own after the transactions?

Following the reported transactions the filing shows beneficial ownership of 14,765 shares of common stock and 25,324 option shares.

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

The filing identifies Ludger Dinkelborg as an Officer and Director, with the remark 'Head of Research and Development'.