Morgan Stanley trims Lantheus (LNTH) ownership to 2.5% of shares

Rhea-AI Filing Summary

Morgan Stanley filed an amended Schedule 13G showing updated ownership in Lantheus Holdings, Inc. common stock as of December 31, 2025. Morgan Stanley reports beneficial ownership of 1,640,837 shares, representing 2.5% of the class, with all voting and dispositive power shared among its reporting units.

Morgan Stanley Capital Services LLC separately reports beneficial ownership of 936,899 shares, or 1.4% of the class, with shared voting and dispositive power. Both reporting persons state they have ceased to be beneficial owners of more than five percent of Lantheus’s common stock and certify that the holdings are in the ordinary course of business and not for influencing control.

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 1)

Lantheus Holdings, Inc.

(Name of Issuer)

Common Stock

(Title of Class of Securities)

516544103

(CUSIP Number)

12/31/2025

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

Rule 13d-1(b)

Rule 13d-1(c)

Rule 13d-1(d)

SCHEDULE 13G

CUSIP No. 516544103

1

Names of Reporting Persons

Morgan Stanley

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 1,596,782.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 1,640,837.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

1,640,837.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

2.5 %

12

Type of Reporting Person (See Instructions)

HC, CO

Comment for Type of Reporting Person: As of the date hereof, Morgan Stanley has ceased to be the beneficial owner of more than five percent of the class of securities.

SCHEDULE 13G

CUSIP No. 516544103

1

Names of Reporting Persons

Morgan Stanley Capital Services LLC

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 936,899.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 936,899.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

936,899.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

1.4 %

12

Type of Reporting Person (See Instructions)

BD, CO

Comment for Type of Reporting Person: As of the date hereof, Morgan Stanley Capital Services LLC has ceased to be the beneficial owner of more than five percent of the class of securities.

SCHEDULE 13G

Item 1.
(a)	Name of issuer: Lantheus Holdings, Inc.
(b)	Address of issuer's principal executive offices: 331 TREBLE COVE ROAD, NORTH BILLERICA, MA, 01862
Item 2.
(a)	Name of person filing: 1: Morgan Stanley 2: Morgan Stanley Capital Services LLC
(b)	Address or principal business office or, if none, residence: 1: 1585 Broadway, New York, NY 10036 ;2: 1585 Broadway, New York, NY 10036
(c)	Citizenship: 1: Delaware 2: Delaware
(d)	Title of class of securities: Common Stock
(e)	CUSIP No.: 516544103
Item 3.	If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:
(a)	Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);
(b)	Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);
(c)	Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
(d)	Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
(e)	An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);
(f)	An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);
(g)	A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
(h)	A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
(i)	A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
(j)	A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J), please specify the type of institution:
(k)	Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
Item 4.	Ownership
(a)	Amount beneficially owned: See the response(s) to Item 9 on the attached cover page(s).
(b)	Percent of class: 2.5 %
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: See the response(s) to Item 5 on the attached cover page(s).
	(ii) Shared power to vote or to direct the vote: See the response(s) to Item 6 on the attached cover page(s).
	(iii) Sole power to dispose or to direct the disposition of: See the response(s) to Item 7 on the attached cover page(s).
	(iv) Shared power to dispose or to direct the disposition of: See the response(s) to Item 8 on the attached cover page(s).
Item 5.	Ownership of 5 Percent or Less of a Class.
	Ownership of 5 percent or less of a class
Item 6.	Ownership of more than 5 Percent on Behalf of Another Person.
	Not Applicable
Item 7.	Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
	If a parent holding company has filed this schedule, pursuant to Rule 13d-1(b)(ii)(G), so indicate under Item 3(g) and attach an exhibit stating the identity and the Item 3 classification of the relevant subsidiary. If a parent holding company has filed this schedule pursuant to Rule 13d-1(c) or Rule 13d-1(d), attach an exhibit stating the identification of the relevant subsidiary. See Exhibit 99.2
Item 8.	Identification and Classification of Members of the Group.
	Not Applicable
Item 9.	Notice of Dissolution of Group.
	Not Applicable

Item 10.

Certifications:

By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under ?? 240.14a-11. * In Accordance with the Securities and Exchange Commission Release No. 34-39538 (January 12, 1998) (the "Release"), this filing reflects the securities beneficially owned, or that may be deemed to be beneficially owned, by certain operating units (collectively, the "MS Reporting Units") of Morgan Stanley and its subsidiaries and affiliates (collectively, "MS"). This filing does not reflect securities, if any, beneficially owned by any operating units of MS whose ownership of securities is disaggregated from that of the MS Reporting Units in accordance with the Release.

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

Morgan Stanley

Signature:	Chris O'Hara
Name/Title:	Authorized Signatory, Morgan Stanley
Date:	02/12/2026

Morgan Stanley Capital Services LLC

Signature:	Chris O'Hara
Name/Title:	Authorized Signatory, Morgan Stanley Capital Services LLC
Date:	02/12/2026

Exhibit Information

EXHIBIT NO. EXHIBITS ------------------ ------------------------------------ 99.1 Joint Filing Agreement 99.2 Item 7 Information * Attention. Intentional misstatements or omissions of fact constitute federal criminal violations (see 18 U.S.C. 1001).

FAQ

What did Morgan Stanley disclose about its Lantheus (LNTH) ownership?

Morgan Stanley disclosed that it beneficially owns 1,640,837 Lantheus common shares, or 2.5% of the class, as of December 31, 2025. The firm holds only shared voting and dispositive power over these shares through its reporting units.

How much Lantheus (LNTH) stock does Morgan Stanley Capital Services LLC own?

Morgan Stanley Capital Services LLC reports beneficial ownership of 936,899 Lantheus common shares, representing 1.4% of the outstanding class. It has shared voting and shared dispositive power over all these shares, with no sole authority indicated in the filing.

Why did Morgan Stanley file this Schedule 13G/A for Lantheus (LNTH)?

The amended Schedule 13G was filed because Morgan Stanley and Morgan Stanley Capital Services LLC have ceased to be beneficial owners of more than five percent of Lantheus’s common stock. Crossing below the 5% threshold triggers an update to their beneficial ownership report.

Does Morgan Stanley seek to influence control of Lantheus (LNTH)?

The filing states the Lantheus securities were acquired and are held in the ordinary course of business, not to change or influence control of the issuer. It also notes the holdings are not connected with transactions aimed at affecting control, with a limited nomination-related exception.

What level of voting power does Morgan Stanley report in Lantheus (LNTH)?

Morgan Stanley reports zero sole voting power and shared voting power over 1,596,782 Lantheus shares. It also reports shared dispositive power over 1,640,837 shares, meaning decisions about voting and selling are made jointly within its reporting units.

What is the key date referenced in this Lantheus (LNTH) ownership filing?

The key date is December 31, 2025, identified as the date of the event requiring the ownership report. The share amounts and percentage interests disclosed by Morgan Stanley and Morgan Stanley Capital Services LLC are stated as of this date in the filing.