{"schema_version":"secwatch.filing_event.v1","accession":"0000950170-23-011995","form_type":"8-K","ticker":"HZEN","cik":"0001748945","company_name":"Grayscale Horizen Trust (ZEN)","filed_at":"2023-04-06T23:59:59+00:00","discovered_at":"2026-05-14T18:03:40.368397+00:00","generated_at":"2026-06-17T05:15:39.309549+00:00","sec_items":["8.01"],"event_type":"other_material","sentiment":"neutral","materiality_score":0.2,"calibrated_materiality_score":0.2,"confidence":"high","headline":"Grayscale Horizen Trust adds Bittrex to reference rate constituent exchanges","bullets":["Effective April 4, 2023, Bittrex added to CoinDesk Horizen Reference Rate.","No exchanges removed; now includes Coinbase Pro, Binance.US, and Bittrex.","Change results from scheduled quarterly review meeting liquidity criteria.","Reference Rate Provider may change venues or calculation method at any time."],"urls":{"canonical":"https://secwatch.observer/filing/0000950170-23-011995","json":"https://secwatch.observer/filing/0000950170-23-011995.json","markdown":"https://secwatch.observer/filing/0000950170-23-011995.md","text":"https://secwatch.observer/filing/0000950170-23-011995.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1748945/000095017023011995/0000950170-23-011995-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1748945/000095017023011995/hzen-20230404.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-06-17T05:15:39.309549+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"}