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The transaction reported in this Form 4 was effected in compliance with Rule 10b5-1 to satisfy withholding tax liabilities of the Reporting Person associated with the vesting of restricted stock previously granted and reported on a previously filed Form 4."}],"balance_after":58514,"source":{"system":"sec-edgar","filing":"0000899243-22-008809","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1861113/000089924322008809/doc4.xml","form_type":"4"}},{"id":2361315,"issuer":{"id":690,"kind":"organization","name":"Lantheus Holdings, Inc.","symbol":"LNTH"},"owners":[{"id":51802,"kind":"person","name":"Niedzwiecki Daniel","position":1,"cik":"0001861113","reported_name":"Niedzwiecki Daniel","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"See Remarks"}}],"security":"Common Stock","published_at":"2022-03-03T02:03:14.000Z","date":"2022-02-28","kind":"grant","acquired":true,"shares":4099,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"The transaction reported in this Form 4 reflects additional shares of common stock issued by the Company to the reporting person upon the vesting of relative Total Shareholder Return performance-based restricted stock units (\"PSUs\") that were previously granted and included in the Form 3 filed upon the reporting person becoming a Section 16 officer. The number of shares reported in the Form 3 reflected 100% of the target number of shares underlying the PSUs. The number of shares that actually vested under the PSUs equaled 188% of the target number of shares. Accordingly, the number of shares reported in this Form 4 reflects the difference between the number of shares that actually vested under the PSUs and the target number of shares originally included in the Form 3."}],"balance_after":61159,"source":{"system":"sec-edgar","filing":"0000899243-22-008809","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1861113/000089924322008809/doc4.xml","form_type":"4"}},{"id":2598228,"issuer":{"id":690,"kind":"organization","name":"Lantheus Holdings, Inc.","symbol":"LNTH"},"owners":[{"id":51802,"kind":"person","name":"Niedzwiecki Daniel","position":1,"cik":"0001861113","reported_name":"Niedzwiecki Daniel","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"See Remarks"}}],"security":"Common Stock","published_at":"2021-08-18T20:30:30.000Z","date":"2021-08-16","kind":"tax_withholding","acquired":false,"shares":243,"price":24.98,"value":6070.14,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The transaction reported on this Form 4 represents the disposition of shares withheld by the Company to satisfy withholding tax liabilities of the Reporting Person associated with the vesting of restricted stock previously granted and reported on a previously filed Form 4."}],"balance_after":57060,"source":{"system":"sec-edgar","filing":"0000899243-21-033453","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1861113/000089924321033453/doc4.xml","form_type":"4"}},{"id":2705822,"issuer":{"id":690,"kind":"organization","name":"Lantheus Holdings, Inc.","symbol":"LNTH"},"owners":[{"id":51802,"kind":"person","name":"Niedzwiecki Daniel","position":1,"cik":"0001861113","reported_name":"Niedzwiecki Daniel","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"See Remarks"}}],"security":"Common Stock","published_at":"2021-05-19T20:30:19.000Z","date":"2021-05-17","kind":"grant","acquired":true,"shares":9093,"price":0,"value":0.0,"ownership":{"direct":true},"balance_after":57303,"source":{"system":"sec-edgar","filing":"0000899243-21-019923","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1861113/000089924321019923/doc4.xml","form_type":"4"}}]}