{"schema_version":"secwatch.filing_event.v1","accession":"0001193805-25-001368","form_type":"8-K","ticker":"ARCT","cik":"0001768224","company_name":"Arcturus Therapeutics Holdings Inc.","filed_at":"2025-09-26T23:59:59+00:00","discovered_at":"2026-05-14T18:02:44.925604+00:00","generated_at":"2026-05-17T05:34:51.577950+00:00","sec_items":["7.01","9.01"],"event_type":"other_material","sentiment":"positive","materiality_score":0.55,"calibrated_materiality_score":0.55,"confidence":"high","headline":"Meiji Seika Pharma launches two-dose vial of KOSTAIVE (sa-mRNA COVID-19 vaccine) in Japan","bullets":["New two-dose vial presentation of KOSTAIVE launched in Japan on September 26, 2025.","Vaccine targets SARS-CoV-2 Omicron sublineage JN.1 variant XEC.","Non-clinical studies show neutralizing antibodies against XEC, LP.8.1, XFG, NB.1.8.1 variants.","Manufacturing and marketing approval granted August 28, 2025."],"urls":{"canonical":"https://secwatch.observer/filing/0001193805-25-001368","json":"https://secwatch.observer/filing/0001193805-25-001368.json","markdown":"https://secwatch.observer/filing/0001193805-25-001368.md","text":"https://secwatch.observer/filing/0001193805-25-001368.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1768224/000119380525001368/0001193805-25-001368-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1768224/000119380525001368/e664858_8k-arct.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-05-17T05:34:51.577950+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"}