{"schema_version":"secwatch.filing_event.v1","accession":"0001193125-26-418417","form_type":"8-K/A","ticker":"RNA","cik":"0002093101","company_name":"Atrium Therapeutics, Inc.","filed_at":"2026-10-09T10:17:57+00:00","discovered_at":"2026-10-09T10:20:00.237621+00:00","generated_at":"2026-10-12T15:20:27.379564+00:00","sec_items":["8.01"],"event_type":"other_material","sentiment":"neutral","materiality_score":0.2,"calibrated_materiality_score":0.2,"confidence":"high","headline":"Atrium Therapeutics corrects post-PIPE share count to 21,571,507, including make-whole spin-off shares","bullets":["PIPE securities purchase agreement dated Oct. 7, 2026 with accredited investors covers 5,170,384 common shares plus pre-funded warrants for up to 1,134,930 shares.","Amendment No. 1 restates shares outstanding after the offering as 21,571,507, correcting the number in the original Oct. 8, 2026 Form 8-K; no other information revised.","That total includes shares issued to settle make-whole equity awards granted in connection with the Company's spin-off from Avidity Biosciences, Inc.","Closing of the offering remains subject to conditions; the company flags risk that it or the PIPE Investors may fail to satisfy them.","Amendment signed Oct. 9, 2026 by Chief Executive Officer Kathleen Gallagher."],"urls":{"canonical":"https://secwatch.observer/filing/0001193125-26-418417","json":"https://secwatch.observer/filing/0001193125-26-418417.json","markdown":"https://secwatch.observer/filing/0001193125-26-418417.md","text":"https://secwatch.observer/filing/0001193125-26-418417.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/2093101/000119312526418417/0001193125-26-418417-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/2093101/000119312526418417/d173581d8ka.htm"},"model":{"generated_by":"deepseek-v4.1-flash:cloud@v2","generated_at":"2026-10-12T15:20:27.379564+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"}