Ownership Submission
FORM 4
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940
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(Print or Type Responses)
1. Name and Address of Reporting Person *
Venkataraman Sriram
   2. Issuer Name and Ticker or Trading Symbol
Lantheus Holdings, Inc. [LNTH] 		5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
__X__ Director __X__ 10% Owner
_____ Officer (give title below) _____ Other (specify below)
(Last)
(First)
(Middle)
C/O AVISTA CAPITAL HOLDINGS, L.P., 65 E. 55TH STREET, 18TH FLOOR		 3. Date of Earliest Transaction (Month/Day/Year)
03/17/2017
(Street)

NEW YORK, NY 10022		 4. If Amendment, Date 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
(City)
(State)
(Zip)
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 03/17/2017   S   1,709,278 D $ 12.2 7,004,395 I See footnote (1)
Common Stock 03/17/2017   S   450,722 D $ 12.2 1,846,996 I See footnote (2)
Common Stock 03/17/2017   S   840,000 D $ 12.2 3,442,208 I See footnote (3)

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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 Underlying Securities
(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 of Derivative Security: 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

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
Venkataraman Sriram
C/O AVISTA CAPITAL HOLDINGS, L.P.
65 E. 55TH STREET, 18TH FLOOR
NEW YORK, NY 10022		   X   X    

Signatures

 By: /s/ Sriram Venkataraman   03/17/2017
**Signature of Reporting Person Date

Explanation of Responses:

* 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).
(1) Represents shares of the Issuer held by Avista Capital Partners, L.P. ("ACP"). Avista Capital Partners GP, LLC ("ACP GP") is the general partner of ACP. Mr. Venkataraman is a member of the investment committee of ACP GP. By virtue of these relationships, Mr. Venkataraman may be deemed to share voting and dispositive power with respect to the shares of common stock held by ACP. Mr. Venkataraman expressly disclaims beneficial ownership of any such securities, except to the extent of his pecuniary interest therein.
(2) Represents shares of the Issuer held by Avista Capital Partners (Offshore), L.P. ("ACP Offshore"). ACP GP is the general partner of ACP Offshore. Mr. Venkataraman is a member of the investment committee of ACP GP. By virtue of these relationships, Mr. Venkataraman may be deemed to share voting and dispositive power with respect to the shares of common stock held by ACP Offshore. Mr. Venkataraman expressly disclaims beneficial ownership of any such securities, except to the extent of his pecuniary interest therein.
(3) Represents shares of the Issuer held by ACP-Lantern Co-Invest, LLC ("ACP Co-Invest"). ACP GP is the manager of ACP Co-Invest. Mr. Venkataraman is a member of the investment committee of ACP GP. By virtue of these relationships, Mr. Venkataraman may be deemed to share voting and dispositive power with respect to the shares of common stock held by ACP Co-Invest. Mr. Venkataraman expressly disclaims beneficial ownership of any such securities, except to the extent of his pecuniary interest therein.

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