{"filing":{"accession_number":"0001193125-26-371276","cik":"0001748945","ticker":"HZEN","company_name":"Grayscale Horizen Trust (ZEN)","form":"8-K","filing_date":"2026-08-27","report_date":"2026-08-27","primary_document":"hzen-20260827.htm","primary_document_url":"https://www.sec.gov/Archives/edgar/data/1748945/000119312526371276/hzen-20260827.htm"},"events":[{"id":30023,"run_id":27518,"accession_number":"0001193125-26-371276","anchor_item_number":"8.01","event_type":"operational_other","event_domain":"operational","is_material":true,"confidence":0.75,"summary":"The Trust is disclosing a material change in its valuation methodology effective September 1, 2026, transitioning from the CoinDesk Horizen Reference Rate to the CoinDesk Horizen Benchmark Extended Rate for calculating NAV and NAV per Share. This operational change affects how the Trust values its ZEN holdings and directly impacts shareholder valuations, making it material to investors. The detailed description of the new Index's methodology, constituent platform selection criteria, and calculation algorithm reflects a significant operational and valuation framework change rather than a routine administrative matter.","company_name":"Grayscale Horizen Trust (ZEN)","ticker":"HZEN","filing_date":"2026-08-27","form":"8-K","submitted_at":null,"items":[{"id":32504,"accession_number":"0001193125-26-371276","item_number":"8.01","item_title":"Other Events.","event_type":"operational_other","event_domain":"operational","is_material":true,"confidence":0.75,"reasoning":"The Trust is disclosing a material change in its valuation methodology effective September 1, 2026, transitioning from the CoinDesk Horizen Reference Rate to the CoinDesk Horizen Benchmark Extended Rate for calculating NAV and NAV per Share. This operational change affects how the Trust values its ZEN holdings and directly impacts shareholder valuations, making it material to investors. The detailed description of the new Index's methodology, constituent platform selection criteria, and calculation algorithm reflects a significant operational and valuation framework change rather than a routine administrative matter.","classifier_version":"claude-haiku-4-5-20251001+prompt-a85dd512","taxonomy_version":"v1.3","classified_at":"2026-08-27T20:10:39.316042+00:00","company_name":"","ticker":null,"filing_date":""}]}],"classifications":[{"id":32504,"accession_number":"0001193125-26-371276","item_number":"8.01","item_title":"Other Events.","event_type":"operational_other","event_domain":"operational","is_material":true,"confidence":0.75,"reasoning":"The Trust is disclosing a material change in its valuation methodology effective September 1, 2026, transitioning from the CoinDesk Horizen Reference Rate to the CoinDesk Horizen Benchmark Extended Rate for calculating NAV and NAV per Share. This operational change affects how the Trust values its ZEN holdings and directly impacts shareholder valuations, making it material to investors. The detailed description of the new Index's methodology, constituent platform selection criteria, and calculation algorithm reflects a significant operational and valuation framework change rather than a routine administrative matter.","classifier_version":"claude-haiku-4-5-20251001+prompt-a85dd512","taxonomy_version":"v1.3","classified_at":"2026-08-27T20:10:39.316042+00:00","company_name":"Grayscale Horizen Trust (ZEN)","ticker":"HZEN","filing_date":"2026-08-27"}]}