{"schema_version":"secwatch.filing_event.v1","accession":"0000950103-25-004590","form_type":"8-K","ticker":"HZEN","cik":"0001748945","company_name":"Grayscale Horizen Trust (ZEN)","filed_at":"2025-04-09T23:59:59+00:00","discovered_at":"2026-05-14T18:02:49.578886+00:00","generated_at":"2026-05-23T18:29:13.235174+00:00","sec_items":["5.02","9.01"],"event_type":"leadership","sentiment":"neutral","materiality_score":0.5,"calibrated_materiality_score":0.5,"confidence":"high","headline":"Grayscale appoints Diana Zhang as new COO; prior COO Hugh Ross to depart by May 31","bullets":["Diana Zhang appointed Chief Operating Officer of Grayscale Operating, LLC effective May 6, 2025.","Zhang succeeds Hugh Ross, who has served as COO since 2021 and will remain through May 31 for transition.","Zhang brings 18+ years of asset management experience, including executive roles at Bridgewater Associates and BlockTower Capital.","Grayscale is the world's largest crypto-focused asset management platform, sponsor of Grayscale Horizen Trust (HZEN)."],"urls":{"canonical":"https://secwatch.observer/filing/0000950103-25-004590","json":"https://secwatch.observer/filing/0000950103-25-004590.json","markdown":"https://secwatch.observer/filing/0000950103-25-004590.md","text":"https://secwatch.observer/filing/0000950103-25-004590.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1748945/000095010325004590/0000950103-25-004590-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1748945/000095010325004590/dp227437_8k-hzen.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-05-23T18:29:13.235174+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"}