{"schema_version":"secwatch.filing_event.v1","accession":"0001193125-26-396654","form_type":"8-K","ticker":"LNTH","cik":"0001521036","company_name":"Lantheus Holdings, Inc.","filed_at":"2026-09-21T20:05:47+00:00","discovered_at":"2026-09-21T20:07:41.359663+00:00","generated_at":"2026-09-21T20:07:55.621017+00:00","sec_items":["8.01"],"event_type":"m_and_a","sentiment":"neutral","materiality_score":0.4,"calibrated_materiality_score":0.4,"confidence":"high","headline":"Lantheus/Curium refile HSR notice; new 30-day FTC review period ends Oct 21, 2026","bullets":["Parent (Curium) withdrew HSR filing Sept 17, 2026; refiled Sept 21, starting new 30-day waiting period expiring Oct 21, 2026.","Merger with Curium still expected to close in first half 2027, pending FTC approval, stockholder adoption, and other customary conditions.","Parties continue working constructively with FTC staff; withdrawal/refiling described as routine to extend review time.","Definitive proxy statement filed with SEC on Sept 8, 2026 for stockholder vote on the merger."],"urls":{"canonical":"https://secwatch.observer/filing/0001193125-26-396654","json":"https://secwatch.observer/filing/0001193125-26-396654.json","markdown":"https://secwatch.observer/filing/0001193125-26-396654.md","text":"https://secwatch.observer/filing/0001193125-26-396654.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1521036/000119312526396654/0001193125-26-396654-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1521036/000119312526396654/d148743d8k.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-09-21T20:07:55.621017+00:00"},"review":{"review_status":"machine_generated","human_reviewed":false,"corrected":false,"correction_note":null,"correction_timestamp":null,"superseded_by":null,"related_filings":[]},"source_grounded_claims":[],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}