{"schema_version":"secwatch.filing_event.v1","accession":"0001564590-21-051435","form_type":"8-K","ticker":"GBTC","cik":"0001588489","company_name":"Grayscale Bitcoin Trust ETF","filed_at":"2021-10-21T23:59:59+00:00","discovered_at":"2026-05-14T18:04:13.170875+00:00","generated_at":"2026-06-28T19:13:24.417764+00:00","sec_items":["8.01","9.01"],"event_type":"other_material","sentiment":"positive","materiality_score":0.65,"calibrated_materiality_score":0.65,"confidence":"high","headline":"DCG increases Grayscale Bitcoin Trust share buyback authorization to $1B","bullets":["DCG authorized purchase of up to $1B of GBTC shares, a $250M increase from prior $750M authorization.","As of Oct 19, 2021, DCG has purchased $388M worth of GBTC shares under the authorization.","DCG will use cash on hand and buy shares on open market at management's discretion under Rule 10b-18.","The authorization does not obligate DCG to buy any specific number of shares and may be modified or discontinued.","Purchases will not occur while the Trust is in private placement activities or just before such activities."],"urls":{"canonical":"https://secwatch.observer/filing/0001564590-21-051435","json":"https://secwatch.observer/filing/0001564590-21-051435.json","markdown":"https://secwatch.observer/filing/0001564590-21-051435.md","text":"https://secwatch.observer/filing/0001564590-21-051435.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1588489/000156459021051435/0001564590-21-051435-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1588489/000156459021051435/gbtc-8k_20211020.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-06-28T19:13:24.417764+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"}