William C. Jr. Dawes Form 3 Lantheus / William C. Jr. Dawes ownership change

SEC Form 3

FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

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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1. Name and Address of Reporting Person^*

Dawes William C. Jr.

(Last) (First) (Middle)

C/O LANTHEUS HOLDINGS, INC.

331 TREBLE COVE ROAD

(Street)

NORTH BILLERICA MA 01862

(City) (State) (Zip)

2. Date of Event Requiring Statement (Month/Day/Year)
06/24/2015

3. Issuer Name and Ticker or Trading Symbol
Lantheus Holdings, Inc. [ LNTH ]

4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director	10% Owner
X	Officer (give title below)	Other (specify below)
VP Mfrg and Operations

5. If Amendment, Date of 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

Table I - Non-Derivative Securities Beneficially Owned
1. Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)
Common Stock	16,369	D

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Stock Option (right to buy)	(1)	04/04/2018	Common Stock	57,829	5.62	D
Stock Option (right to buy)	(2)	04/04/2018	Common Stock	22,321	5.62	D
Stock Option (right to buy)	(3)	08/05/2023	Common Stock	16,014	18.66	D

Explanation of Responses:

1. This option is currently exercisable.

2. On April 4, 2008, the reporting person was granted this option to purchase 57,829 shares of Common Stock. This option vests in five equal annual installments based on the level of LNTH's satisfaction of certain performance criteria for each of fiscal years 2008, 2009, 2010, 2011 and 2012. A certain level of the performance criteria for each of fiscal years 2008 and 2009 was met, resulting in vesting of this option as to 22,321 shares.

3. The shares subject to this option vest in four equal annual installments, beginning August 5, 2014.

Remarks:

Exhibit List Exhibit 24 - Power of Attorney

	/s/ Michael P. Duffy, attorney-in-fact	06/24/2015
	** 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 5 (b)(v).
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