2,536 Lantheus shares withheld for exercise or taxes

Lantheus Holdings, Inc. (LNTH) reported that Ludger Dinkelborg, Head of Research and Development, had 2,536 shares of common stock withheld on 2026-08-17 to cover the exercise price or tax liability, at a reference price of $100.91 per share.

Rhea-AI Filing Summary

Lantheus Holdings, Inc. (LNTH) reported that Ludger Dinkelborg, Head of Research and Development, had 2,536 shares of common stock withheld on 2026-08-17 to cover the exercise price or tax liability, at a reference price of $100.91 per share. After this Form 4 transaction, he directly holds 33,195 shares of Lantheus common stock. The transaction was not reported as being made under a Rule 10b5-1 trading plan.

Insider Trade Summary

Exercise Price or Tax Liability: 2,536 shares

Exercise Price or Tax Liability 1 txn

Insider Dinkelborg Ludger

Role See Remarks

Type	Security	Shares	Price	Value
Exercise Price or Tax Liability	Common Stock	2,536	$100.91	$256K

Holdings After Transaction: Common Stock — 33,195 shares (Direct)

Key Figures

Shares delivered/withheld: 2,536 shares Per-share reference price: $100.91 per share Post-transaction holdings: 33,195 shares +1 more

4 metrics

Shares delivered/withheld 2,536 shares Code F non-derivative disposition on 2026-08-17 to cover exercise price or tax liability

Per-share reference price $100.91 per share Price associated with the 2,536-share code F disposition

Post-transaction holdings 33,195 shares Direct LNTH common stock held by Ludger Dinkelborg after the reported transaction

Exercise-price-or-tax-liability shares 2,536 shares Total shares reported in transactionSummary as used for exercise price or tax liability

Key Terms

exercise price or tax liability, Form 4, non-derivative

3 terms

exercise price or tax liability financial

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

Form 4 regulatory

"This was a Form 4 code F transaction classified as a disposition"

Form 4 is a official document that company insiders, such as executives or major shareholders, file with regulators whenever they buy or sell company shares. It provides transparency about how those with inside knowledge are trading, helping investors see if insiders are confident in the company's prospects or may be selling for personal reasons. This information can influence investor decisions by revealing insiders' perspectives on the company's value.

non-derivative financial

"Code F non-derivative disposition on 2026-08-17"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider transaction did LNTH executive Ludger Dinkelborg report on this Form 4?

Ludger Dinkelborg reported that 2,536 LNTH common shares were withheld on 2026-08-17 to pay the exercise price or tax liability. This was a Form 4 code F transaction classified as an exercise-price-or-tax-liability disposition, not an open-market sale.

At what price were the LNTH shares valued in Ludger Dinkelborg’s reported Form 4 transaction?

The withheld LNTH shares were valued at $100.91 per share. This per-share figure is tied to the code F transaction in which 2,536 common shares were delivered or withheld to satisfy either the option exercise price or associated tax obligations.

How many LNTH shares does Ludger Dinkelborg hold after the reported Form 4 transaction?

After the transaction, Ludger Dinkelborg directly holds 33,195 shares of LNTH common stock. This post-transaction balance reflects the net holdings following the 2,536-share disposition used to cover the exercise price or tax liability related to equity compensation.

Was Ludger Dinkelborg’s LNTH Form 4 transaction executed under a Rule 10b5-1 plan?

The Form 4 indicates the transaction was not made under a Rule 10b5-1 trading plan. The document’s 10b5-1 checkbox is explicitly unchecked, so the 2,536-share code F disposition is not reported as pre-arranged under such a plan.

Does the LNTH Form 4 report an open-market sale by Ludger Dinkelborg?

No, the Form 4 reports a code F transaction, not an open-market sale. The 2,536 shares of LNTH common stock were delivered or withheld specifically for payment of the exercise price or tax liability, rather than being sold in the market.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 08/19/2026 - 04:34 PM Accepted by SEC EDGAR 08/19/2026 - 04:34 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^*

Dinkelborg Ludger

(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)
	See Remarks

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
08/17/2026

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	08/17/2026		F		2,536	D	$100.91	33,195	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:

Remarks:

Head of Research and Development

	/s/ Eric M. Green, attorney-in-fact	08/19/2026
	** 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)