SEC FORM 4

SEC FORM 4 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^*

FARALLON PARTNERS L L C/CA

(Last)

(First)

(Middle)

ONE MARITIME PLAZA, SUITE 2100

(Street)

SAN FRANCISCO

94111

(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	X	10% Owner
Officer (give title below)	X	Other (specify below)
		Member of a Group Owning 10%

3. Date of Earliest Transaction (Month/Day/Year)
08/19/2025

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

	Form filed by One Reporting Person
X	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)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Common Stock	08/19/2025		S		41,000	D	$55.34	6,842,227	I	See Footnotes⁽¹⁾⁽²⁾⁽³⁾⁽⁴⁾⁽⁵⁾
Common Stock	08/20/2025		S		3,365,000	D	$56.15⁽⁶⁾	3,477,227	I	See Footnotes⁽¹⁾⁽²⁾⁽³⁾⁽⁴⁾⁽⁵⁾

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)
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)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)

1. Name and Address of Reporting Person^*

FARALLON PARTNERS L L C/CA

(Last)

(First)

(Middle)

ONE MARITIME PLAZA, SUITE 2100

(Street)

SAN FRANCISCO

94111

(City)

(State)

(Zip)

Relationship of Reporting Person(s) to Issuer

Director	X	10% Owner
Officer (give title below)	X	Other (specify below)
		Member of a Group Owning 10%

1. Name and Address of Reporting Person^*

Dapice Joshua J.

(Last)

(First)

(Middle)

C/O FARALLON CAPITAL MANAGEMENT, L.L.C.

ONE MARITIME PLAZA, SUITE 2100

(Street)

SAN FRANCISCO

94111

(City)

(State)

(Zip)

Relationship of Reporting Person(s) to Issuer

Director		10% Owner
Officer (give title below)	X	Other (specify below)
		Member of a Group Owning 10%

1. Name and Address of Reporting Person^*

Dreyfuss Philip D

(Last)

(First)

(Middle)

C/O FARALLON CAPITAL MANAGEMENT, L.L.C.

ONE MARITIME PLAZA, SUITE 2100

(Street)

SAN FRANCISCO

94111

(City)

(State)

(Zip)

Relationship of Reporting Person(s) to Issuer

Director		10% Owner
Officer (give title below)	X	Other (specify below)
		Member of a Group Owning 10%

1. Name and Address of Reporting Person^*

Dunn Hannah E.

(Last)

(First)

(Middle)

C/O FARALLON CAPITAL MANAGEMENT, L.L.C.

ONE MARITIME PLAZA, SUITE 2100

(Street)

SAN FRANCISCO

94111

(City)

(State)

(Zip)

Relationship of Reporting Person(s) to Issuer

Director		10% Owner
Officer (give title below)	X	Other (specify below)
		Member of a Group Owning 10%

1. Name and Address of Reporting Person^*

FRIED RICHARD B

(Last)

(First)

(Middle)

C/O FARALLON CAPITAL MANAGEMENT, L.L.C.

ONE MARITIME PLAZA, SUITE 2100

(Street)

SAN FRANCISCO

94111

(City)

(State)

(Zip)

Relationship of Reporting Person(s) to Issuer

Director		10% Owner
Officer (give title below)	X	Other (specify below)
		Member of a Group Owning 10%

1. Name and Address of Reporting Person^*

Gehani Varun N

(Last)

(First)

(Middle)

C/O FARALLON CAPITAL MANAGEMENT, L.L.C.

ONE MARITIME PLAZA, SUITE 2100

(Street)

SAN FRANCISCO

94111

(City)

(State)

(Zip)

Relationship of Reporting Person(s) to Issuer

Director		10% Owner
Officer (give title below)	X	Other (specify below)
		Member of a Group Owning 10%

1. Name and Address of Reporting Person^*

Giauque Nicolas

(Last)

(First)

(Middle)

C/O FARALLON CAPITAL MANAGEMENT, L.L.C.

ONE MARITIME PLAZA, SUITE 2100

(Street)

SAN FRANCISCO

94111

(City)

(State)

(Zip)

Relationship of Reporting Person(s) to Issuer

Director		10% Owner
Officer (give title below)	X	Other (specify below)
		Member of a Group Owning 10%

1. Name and Address of Reporting Person^*

Kim David T

(Last)

(First)

(Middle)

C/O FARALLON CAPITAL MANAGEMENT, L.L.C.

ONE MARITIME PLAZA, SUITE 2100

(Street)

SAN FRANCISCO

94111

(City)

(State)

(Zip)

Relationship of Reporting Person(s) to Issuer

Director		10% Owner
Officer (give title below)	X	Other (specify below)
		Member of a Group Owning 10%

1. Name and Address of Reporting Person^*

Linn Michael G

(Last)

(First)

(Middle)

C/O FARALLON CAPITAL MANAGEMENT, L.L.C.

ONE MARITIME PLAZA, SUITE 2100

(Street)

SAN FRANCISCO

94111

(City)

(State)

(Zip)

Relationship of Reporting Person(s) to Issuer

Director		10% Owner
Officer (give title below)	X	Other (specify below)
		Member of a Group Owning 10%

1. Name and Address of Reporting Person^*

Luo Patrick (Cheng)

(Last)

(First)

(Middle)

C/O FARALLON CAPITAL MANAGEMENT, L.L.C.

ONE MARITIME PLAZA, SUITE 2100

(Street)

SAN FRANCISCO

94111

(City)

(State)

(Zip)

Relationship of Reporting Person(s) to Issuer

Director		10% Owner
Officer (give title below)	X	Other (specify below)
		Member of a Group Owning 10%

Explanation of Responses:

1. The entities and individuals identified in the footnotes of this Form 4 may be deemed members of a group holding equity securities of Lantheus Holdings, Inc. (the "Issuer"). The filing of this Form 4 and any statements included herein shall not be deemed to be an admission that such entities and individuals are members of such a group.

2. Since the number of reporting persons that may be listed on a Form 4 is limited, the entities and individuals listed in these footnotes that are not reporting persons on this Form 4 are filing an additional Form 4 on the date hereof as reporting persons with respect to the securities described herein (the "Parallel Form 4"). Information regarding these entities and individuals is included in this Form 4 for purposes of clarification and convenience only, and is duplicative of the information reported in the Parallel Form 4.

3. The amount of securities shown in this row is held directly by certain investment funds affiliated with the reporting persons (the "Farallon Funds").

4. Farallon Partners, L.L.C. and certain affiliated entities (the "Farallon General Partners"), as general partner or sole member of the general partner, as the case may be, of each of the Farallon Funds, may be deemed to be a beneficial owner of the Issuer's securities held by the Farallon Funds. The Farallon General Partners disclaim any beneficial ownership of any of the Issuer's securities reported or noted herein for purposes of Section 16 of the Securities Exchange Act of 1934, as amended (the "'34 Act"), or otherwise, except to the extent of their pecuniary interest, if any.

5. Each of Joshua J. Dapice, Philip D. Dreyfuss, Hannah E. Dunn, Richard B. Fried, Varun N. Gehani, Nicolas Giauque, David T. Kim, Michael G. Linn, Patrick (Cheng) Luo, Rajiv A. Patel, Thomas G. Roberts, Jr., Edric C. Saito, William Seybold, Daniel S. Short, Andrew J. M. Spokes, John R. Warren, and Mark C. Wehrly (collectively, the "Managing Members"), as a managing member or manager, or senior managing member or senior manager, as the case may be, of each of the Farallon General Partners, in each case with the power to exercise investment discretion, may be deemed to be a beneficial owner of the Issuer's securities held by the Farallon Funds. Each of the Managing Members disclaims any beneficial ownership of any of the Issuer's securities reported or noted herein for purposes of Section 16 of the '34 Act or otherwise, except to the extent of his or her pecuniary interest, if any.

6. The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $56.14 to $56.55, inclusive. The Reporting Persons undertake to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the range.

	/s/ Hannah E. Dunn, Managing Member	08/21/2025
	/s/ Hannah E. Dunn, as attorney-in-fact	08/21/2025
	/s/ Hannah E. Dunn, as attorney-in-fact	08/21/2025
	/s/ Hannah E. Dunn	08/21/2025
	/s/ Hannah E. Dunn, as attorney-in-fact	08/21/2025
	/s/ Hannah E. Dunn, as attorney-in-fact	08/21/2025
	/s/ Hannah E. Dunn, as attorney-in-fact	08/21/2025
	/s/ Hannah E. Dunn, as attorney-in-fact	08/21/2025
	/s/ Hannah E. Dunn, as attorney-in-fact	08/21/2025
	/s/ Hannah E. Dunn, as attorney-in-fact	08/21/2025
	** 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).
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Member of a Group Owning 10% Farallon Partners L L C/Ca sold $191,213,690 worth of shares (3,406,000 units at $56.14) (SEC Form 4)