{"schema_version":"secwatch.filing_event.v1","accession":"0000950170-23-014586","form_type":"8-K","ticker":"HZEN","cik":"0001748945","company_name":"Grayscale Horizen Trust (ZEN)","filed_at":"2023-04-26T23:59:59+00:00","discovered_at":"2026-05-14T18:03:40.368602+00:00","generated_at":"2026-06-16T13:17:32.920115+00:00","sec_items":["8.01"],"event_type":"other_material","sentiment":"neutral","materiality_score":0.3,"calibrated_materiality_score":0.3,"confidence":"high","headline":"Grayscale Horizen Trust removes Bittrex from reference rate; now uses Coinbase Pro and Binance.US","bullets":["Bittrex removed from CoinDesk Horizen Reference Rate due to ceasing U.S. customer service.","No new exchanges added; current constituents: Coinbase Pro and Binance.US.","Change effective April 21, 2023; quarterly reviews may alter constituents.","Reference Rate Provider may change venues or calculation method at any time."],"urls":{"canonical":"https://secwatch.observer/filing/0000950170-23-014586","json":"https://secwatch.observer/filing/0000950170-23-014586.json","markdown":"https://secwatch.observer/filing/0000950170-23-014586.md","text":"https://secwatch.observer/filing/0000950170-23-014586.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1748945/000095017023014586/0000950170-23-014586-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1748945/000095017023014586/hzen-20230421.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-06-16T13:17:32.920115+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"}