{"schema_version":"secwatch.filing_event.v1","accession":"0000950170-25-105831","form_type":"8-K","ticker":"ETHE","cik":"0001725210","company_name":"Grayscale Ethereum Staking ETF","filed_at":"2025-08-08T23:59:59+00:00","discovered_at":"2026-05-14T18:02:44.807958+00:00","generated_at":"2026-05-17T16:41:37.707311+00:00","sec_items":["1.01","9.01"],"event_type":"other_material","sentiment":"neutral","materiality_score":0.5,"calibrated_materiality_score":0.5,"confidence":"high","headline":"Grayscale Ethereum Trust adds Anchorage Digital as second Ether custodian; Coinbase remains primary","bullets":["Trust entered custodial agreement with Anchorage Digital Bank on Aug 8, 2025, to custody a portion of its Ether holdings.","Anchorage will hold private keys in cold storage; Coinbase remains primary custodian, unchanged.","Sponsor has not yet determined amount of Ether to move; addition reflects risk management for growing trust size.","Agreement also covers Grayscale Bitcoin Trust ETF (GBTC) as a client under same master custody agreement.","Anchorage Digital is a national trust bank chartered by OCC; provides custody and safekeeping services."],"urls":{"canonical":"https://secwatch.observer/filing/0000950170-25-105831","json":"https://secwatch.observer/filing/0000950170-25-105831.json","markdown":"https://secwatch.observer/filing/0000950170-25-105831.md","text":"https://secwatch.observer/filing/0000950170-25-105831.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1725210/000095017025105831/0000950170-25-105831-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1725210/000095017025105831/ethe-20250808.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-05-17T16:41:37.707311+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"}