Lantheus (LNTH) awards 20,966 RSUs and PSUs to executive Dinkelborg

Rhea-AI Filing Summary

Dinkelborg Ludger reported acquisition or exercise transactions in this Form 4 filing.

Lantheus Holdings executive Ludger Dinkelborg received an equity award of 20,966 shares of common stock on March 5, 2026 at no purchase cost. After this grant, his directly held common stock totaled 35,731 shares.

The award consists of 10,483 restricted stock units that vest in equal installments over three years and 10,483 Total Shareholder Return performance-based restricted stock units that cliff vest after a three-year performance period. The performance-based units can ultimately settle at 0% to 200% of the target amount depending on results.

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

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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)
03/05/2026

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	03/05/2026		A(1)		20,966	A	$0	35,731	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. Consists of 10,483 restricted stock units that vest in equal installments over a three-year period and 10,483 Total Shareholder Return performance-based restricted stock units ("PSUs") that cliff vest following a three-year performance period. The amount of PSUs included in this Report reflects the target award; however, the ultimate award size can range from 0% to 200% of the target based on the actual performance achieved at the end of the performance period.

Remarks:

Head of Research and Development

	/s/ Eric M. Green, attorney-in-fact	03/09/2026
	** 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 did Ludger Dinkelborg report in this Form 4 for Lantheus (LNTH)?

Ludger Dinkelborg reported receiving an equity grant of 20,966 shares of Lantheus common stock. The award was granted at no purchase price and increased his directly held shares to 35,731, reflecting stock-based compensation rather than an open-market transaction.

How is Ludger Dinkelborg’s 20,966-share award from Lantheus (LNTH) structured?

The 20,966-share award is split into 10,483 time-vesting restricted stock units and 10,483 Total Shareholder Return performance-based restricted stock units. The time-vesting units vest over three years, while the performance units depend on three-year performance outcomes.

When do Ludger Dinkelborg’s Lantheus (LNTH) restricted stock units vest?

Half of the award, 10,483 restricted stock units, vests in equal installments over a three-year period. The remaining 10,483 performance-based units cliff vest after a three-year performance period, subject to Total Shareholder Return performance criteria.

How can the size of Ludger Dinkelborg’s Lantheus (LNTH) performance-based PSUs change?

The Total Shareholder Return performance-based restricted stock units are granted at a target of 10,483 units. The ultimate number earned can range from 0% to 200% of this target, depending on Lantheus’s actual performance over the three-year measurement period.

What is Ludger Dinkelborg’s Lantheus (LNTH) share ownership after this Form 4 grant?

Following the March 5, 2026 grant, Ludger Dinkelborg directly holds 35,731 shares of Lantheus common stock. This figure includes the newly awarded restricted stock units and performance-based units reported as part of his stock-based compensation package.