{"schema_version":"secwatch.filing_event.v1","accession":"0001193125-25-236072","form_type":"8-K","ticker":"GBTC","cik":"0001588489","company_name":"Grayscale Bitcoin Trust ETF","filed_at":"2025-10-09T23:59:59+00:00","discovered_at":"2026-05-14T18:02:39.837933+00:00","generated_at":"2026-05-17T04:11:35.064232+00:00","sec_items":["1.01","1.02","9.01"],"event_type":"other_material","sentiment":"neutral","materiality_score":0.35,"calibrated_materiality_score":0.35,"confidence":"medium","headline":"Grayscale Bitcoin Trust enters new prime broker and admin agreements with Coinbase and BNY Mellon","bullets":["On Oct 3, 2025, signed new Prime Broker Agreement with Coinbase, Inc., Coinbase Custody, and Coinbase Credit.","On Oct 9, 2025, BNY Mellon became fund administrator under a new Fund Administration and Accounting Agreement.","Previous prime broker agreement (Dec 29, 2023) and prior BNY admin agreement (Feb 26, 2024) were terminated on the respective effective dates.","Coinbase Custody remains custodian; BNY continues providing admin/accounting services under new terms."],"urls":{"canonical":"https://secwatch.observer/filing/0001193125-25-236072","json":"https://secwatch.observer/filing/0001193125-25-236072.json","markdown":"https://secwatch.observer/filing/0001193125-25-236072.md","text":"https://secwatch.observer/filing/0001193125-25-236072.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1588489/000119312525236072/0001193125-25-236072-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1588489/000119312525236072/gbtc-20251003.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-05-17T04:11:35.064232+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"}