{"schema_version":"secwatch.filing_event.v1","accession":"0001193125-26-414207","form_type":"8-K","ticker":"GTAO","cik":"0002029297","company_name":"Grayscale Bittensor Trust (TAO)","filed_at":"2026-10-05T20:28:36+00:00","discovered_at":"2026-10-05T20:29:00.260435+00:00","generated_at":"2026-10-12T14:51:53.505277+00:00","sec_items":["1.01","1.02","9.01"],"event_type":"other_material","sentiment":"neutral","materiality_score":0.62,"calibrated_materiality_score":0.62,"confidence":"high","headline":"Grayscale Bittensor Trust adds Coinbase as additional custodian, terminates prior BitGo agreement","bullets":["On September 30, 2026, Grayscale Bittensor Trust (TAO) became party to an amended BitGo Custodial Services Agreement; its prior March 12, 2025 BitGo agreement was terminated.","On September 29, 2026, Sponsor and Coinbase, Inc. amended the Coinbase Prime Broker Agreement to add the Trust; Coinbase will custody a portion of the Trust's TAO.","BitGo remains the Trust's primary custodian; the Sponsor has not determined how much TAO it will move to Coinbase, and Coinbase custody is part of risk management as the Trust grows.","Exhibits 10.1-10.4 include the amended BitGo and Coinbase agreements; Kathryn Masci, Interim CFO of Grayscale Investments Sponsors, LLC, signed on October 5, 2026."],"urls":{"canonical":"https://secwatch.observer/filing/0001193125-26-414207","json":"https://secwatch.observer/filing/0001193125-26-414207.json","markdown":"https://secwatch.observer/filing/0001193125-26-414207.md","text":"https://secwatch.observer/filing/0001193125-26-414207.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/2029297/000119312526414207/0001193125-26-414207-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/2029297/000119312526414207/gtao-20260930.htm"},"model":{"generated_by":"deepseek-v4.1-flash:cloud@v2","generated_at":"2026-10-12T14:51:53.505277+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"}