{"schema_version":"secwatch.filing_event.v1","accession":"0001171843-26-000303","form_type":"8-K","ticker":"ABUS","cik":"0001447028","company_name":"Arbutus Biopharma Corp","filed_at":"2026-01-16T23:59:59+00:00","discovered_at":"2026-05-14T18:02:35.103495+00:00","generated_at":"2026-05-16T09:45:49.609541+00:00","sec_items":["8.01"],"event_type":"litigation","sentiment":"negative","materiality_score":0.75,"calibrated_materiality_score":0.75,"confidence":"high","headline":"EPO revokes Arbutus' European patent EP 2279254; company plans appeal","bullets":["EPO Board of Appeal revoked Arbutus' European patent EP 2279254 on Jan 15, 2026; verbal decision without reasons; written decision expected in months.","Opposition originally filed by Moderna affiliates and Merck in April 2018; two prior EPO decisions had upheld amended patent.","Company plans to petition EPO Enlarged Board of Appeal upon receipt of written decision; decision affects cases vs Moderna in Switzerland and UPC Case UPC_CFI_191/2025.","Decision does not impact litigations in US, Japan, Canada, other UPC case (UPC_CFI_192/2025), or cases against Pfizer/BioNTech.","Company notes added-matter standard used by EPO does not apply in US or other jurisdictions; no impact on other patent cases."],"urls":{"canonical":"https://secwatch.observer/filing/0001171843-26-000303","json":"https://secwatch.observer/filing/0001171843-26-000303.json","markdown":"https://secwatch.observer/filing/0001171843-26-000303.md","text":"https://secwatch.observer/filing/0001171843-26-000303.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1447028/000117184326000303/0001171843-26-000303-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1447028/000117184326000303/f8k_011626.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-05-16T09:45:49.609541+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"}