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Each of ACP GP and ACP Offshore expressly disclaims beneficial ownership of any such securities, except to the extent of its pecuniary interest therein."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F6","text":"On August 14, 2017, ACP Offshore distributed 815,672 shares of common stock to one or more members or partners."}],"balance_after":117600,"source":{"system":"sec-edgar","filing":"0000899243-17-020545","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1613694/000089924317020545/doc4.xml","form_type":"4"}},{"id":4232498,"issuer":{"id":690,"kind":"organization","name":"Lantheus Holdings, Inc.","symbol":"LNTH"},"owners":[{"id":173762,"kind":"organization","name":"Avista Capital Partners GP, LLC","position":1,"cik":"0001374781","reported_name":"Avista Capital Partners GP, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":168137,"kind":"organization","name":"Avista Capital Partners, L.P.","position":2,"cik":"0001374541","reported_name":"Avista Capital Partners, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":168138,"kind":"organization","name":"Avista Capital Partners (Offshore), L.P.","position":3,"cik":"0001374540","reported_name":"Avista Capital Partners (Offshore), L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":173763,"kind":"organization","name":"ACP-Lantern Co-Invest, LLC","position":4,"cik":"0001613694","reported_name":"ACP-Lantern Co-Invest, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2017-08-16T20:06:58.000Z","date":"2017-08-14","kind":"other","acquired":false,"shares":2785709,"price":17.15,"value":47774909.35,"ownership":{"direct":false,"nature":"See footnotes"},"footnotes":[{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Represents shares of the Issuer held by Avista Capital Partners, L.P. 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Each of ACP GP and ACP expressly disclaims beneficial ownership of any such securities, except to the extent of its pecuniary interest therein."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F5","text":"On August 14, 2017, ACP distributed 2,785,709 shares of common stock to one or more members or partners."}],"balance_after":724471,"source":{"system":"sec-edgar","filing":"0000899243-17-020545","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1613694/000089924317020545/doc4.xml","form_type":"4"}},{"id":4232497,"issuer":{"id":690,"kind":"organization","name":"Lantheus Holdings, Inc.","symbol":"LNTH"},"owners":[{"id":173762,"kind":"organization","name":"Avista Capital Partners GP, LLC","position":1,"cik":"0001374781","reported_name":"Avista Capital Partners GP, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":168137,"kind":"organization","name":"Avista Capital Partners, L.P.","position":2,"cik":"0001374541","reported_name":"Avista Capital Partners, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":168138,"kind":"organization","name":"Avista Capital Partners (Offshore), L.P.","position":3,"cik":"0001374540","reported_name":"Avista Capital Partners (Offshore), L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":173763,"kind":"organization","name":"ACP-Lantern Co-Invest, LLC","position":4,"cik":"0001613694","reported_name":"ACP-Lantern Co-Invest, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2017-08-16T20:06:58.000Z","date":"2017-08-14","kind":"sale","acquired":false,"shares":1788,"price":18.05,"value":32273.4,"ownership":{"direct":false,"nature":"See footnote"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $18.00 to $18.18, inclusive."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"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. 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