{"schema_version":"secwatch.filing_event.v1","accession":"0001104659-25-036483","form_type":"8-K","ticker":"ALMS","cik":"0001847367","company_name":"ALUMIS INC.","filed_at":"2025-04-21T23:59:59+00:00","discovered_at":"2026-05-14T18:02:50.125434+00:00","generated_at":"2026-05-23T10:36:02.332051+00:00","sec_items":["1.01","8.01","9.01"],"event_type":"m_and_a","sentiment":"positive","materiality_score":0.75,"calibrated_materiality_score":0.75,"confidence":"high","headline":"Alumis and ACELYRIN amend merger terms; ACELYRIN stockholders get 48% ownership of combined company","bullets":["Exchange ratio revised to 0.4814 Alumis shares per ACELYRIN share, up from original terms; Alumis stockholders own ~52%, ACELYRIN ~48% fully diluted.","Special Meeting of Stockholders for both companies scheduled for May 13, 2025; record date April 1, 2025.","Pro forma cash position of combined company ~$737M as of Dec 31, 2024; runway expected into 2027 for key data readouts.","Stockholders representing ~62% of Alumis and ~24% of ACELYRIN have entered into voting agreements supporting the transaction.","Merger expected to close in Q2 2025, subject to stockholder approvals and customary conditions."],"urls":{"canonical":"https://secwatch.observer/filing/0001104659-25-036483","json":"https://secwatch.observer/filing/0001104659-25-036483.json","markdown":"https://secwatch.observer/filing/0001104659-25-036483.md","text":"https://secwatch.observer/filing/0001104659-25-036483.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1847367/000110465925036483/0001104659-25-036483-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1847367/000110465925036483/tm2512707d4_8k.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-05-23T10:36:02.332051+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"}