STOCK TITAN

Lantheus (LNTH) CEO Heino reports 1,227-share tax withholding and updated holdings

Filing Impact
(Moderate)
Filing Sentiment
(Neutral)
Form Type
4

Rhea-AI Filing Summary

Lantheus Holdings Executive Chair and CEO Mary Anne Heino reported routine equity activity involving company common stock. The only transactional entry shows 1,227 shares of common stock were disposed of as a tax-withholding disposition at $96.67 per share, meaning shares were withheld to satisfy tax obligations rather than sold in the open market.

After this event, Heino directly holds 321,897 shares of Lantheus Holdings common stock. She also has indirect ownership through several trusts, including 179,300 shares held by The Heino 2024 Family Trust, 8,618 shares held by the Heino Irrevocable Trust, and 78,153 shares held by The Mary Anne Fennell Heino Revocable Trust - 2018.

Positive

  • None.

Negative

  • None.
Insider Heino Mary Anne
Role Executive Chair and CEO
Type Security Shares Price Value
Tax Withholding Common Stock 1,227 $96.67 $119K
holding Common Stock -- -- --
holding Common Stock -- -- --
holding Common Stock -- -- --
Holdings After Transaction: Common Stock — 321,897 shares (Direct, null); Common Stock — 78,153 shares (Indirect, By The Mary Anne Fennell Heino Revocable Trust - 2018)
Footnotes (1)
Tax-withheld shares 1,227 shares Common Stock disposed in tax-withholding transaction at $96.67 per share
Tax-withholding price $96.67 per share Price for 1,227 shares used to satisfy tax liability
Direct holdings after transaction 321,897 shares Common Stock directly held by Mary Anne Heino after tax-withholding disposition
Heino 2024 Family Trust holdings 179,300 shares Indirect ownership via The Heino 2024 Family Trust
Heino Irrevocable Trust holdings 8,618 shares Indirect ownership via Heino Irrevocable Trust
Revocable Trust 2018 holdings 78,153 shares Indirect ownership via The Mary Anne Fennell Heino Revocable Trust - 2018
tax-withholding disposition financial
"The Form 4 describes the 1,227-share entry as a tax-withholding disposition."
A tax-withholding disposition is an event or transaction—such as selling or transferring securities, exercising options, or receiving compensation—that triggers a requirement to hold back part of the payment and remit it to tax authorities. It matters to investors because it reduces the cash they receive immediately and can change the timing and amount of taxable income, like a cashier taking a portion of your sale proceeds to pay taxes before you get the rest.
indirect ownership financial
"Several entries list indirect ownership of common stock through various trusts."
Common Stock financial
"Each reported entry involves Lantheus Holdings, Inc. Common Stock."
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.
Form 4 regulatory
"The insider activity is reported on a Form 4 for Lantheus Holdings, Inc."
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.
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SEC Form 4
FORM 4UNITED 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 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)
XDirector10% Owner
XOfficer (give title below)Other (specify below)
Executive Chair and CEO
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
05/14/2026
6. Individual or Joint/Group Filing (Check Applicable Line)
XForm 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)
CodeVAmount(A) or (D)Price
Common Stock05/14/2026F1,227D$96.67321,897D
Common Stock78,153IBy The Mary Anne Fennell Heino Revocable Trust - 2018
Common Stock8,618IBy Heino Irrevocable Trust
Common Stock179,300IBy 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)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Explanation of Responses:
/s/ Eric M. Green, attorney-in-fact06/03/2026
** Signature of Reporting PersonDate
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)