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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1521036	Lantheus Holdings Inc.	LNTH	()	4

Insiders

Cik	Name	Reported Address	Director	Officer	Large Shareholder	Other
1374540	Avista Capital Partners (Offshore), L.p.	65 East 55Th Street 18Th Floor New York NY 10022	No	No	Yes	No
1374541	Avista Capital Partners, L.p.	65 East 55Th Street 18Th Floor New York NY 10022	No	No	Yes	No
1374781	Avista Capital Partners Gp, Llc	Avista Capital Holdings, L.p. 65 E. 55Th Street, 18Th Floor New York NY 10022	No	No	Yes	No
1613694	Acp-Lantern Co-Invest, Llc	65 East 55Th Street 18Th Floor New York NY 10022	No	No	Yes	No

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
Common Stock	Disposition	2017-05-09	1,709,278	$13.40	5,295,117	No	4	S	Indirect	See footnote
Common Stock	Disposition	2017-05-09	450,722	$13.40	1,396,274	No	4	S	Indirect	See footnote
Common Stock	Disposition	2017-05-09	840,000	$13.40	2,602,208	No	4	S	Indirect	See footnote

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	S	Indirect	See footnote
No	4	S	Indirect	See footnote
No	4	S	Indirect	See footnote

Footnotes

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. By virtue of this relationship, ACP GP may be deemed to share voting and dispositive power with respect to the shares of common stock held by ACP. Each of ACP GP and ACP expressly disclaims beneficial ownership of any such securities, except to the extent of its pecuniary interest therein.
Represents shares of the Issuer held by Avista Capital Partners (Offshore), L.P. ("ACP Offshore"). ACP GP is the general partner of ACP Offshore. By virtue of this relationship, ACP GP may be deemed to share voting and dispositive power with respect to the shares of common stock held by ACP Offshore. Each of ACP GP and ACP Offshore expressly disclaims beneficial ownership of any such securities, except to the extent of its pecuniary interest therein.
Represents shares of the Issuer held by ACP-Lantern Co-Invest, LLC ("ACP Co-Invest"). ACP GP is the manager of ACP Co-Invest. By virtue of this relationship, ACP GP may be deemed to share voting and dispositive power with respect to the shares of common stock held by ACP Co-Invest. Each of ACP GP and ACP Co-Invest expressly disclaims beneficial ownership of any such securities, except to the extent of its pecuniary interest therein.