{"schema_version":"secwatch.filing_event.v1","accession":"0000950103-25-004588","form_type":"8-K","ticker":"GBTC","cik":"0001588489","company_name":"Grayscale Bitcoin Trust ETF","filed_at":"2025-04-09T23:59:59+00:00","discovered_at":"2026-05-14T18:02:48.912507+00:00","generated_at":"2026-05-23T18:20:08.348982+00:00","sec_items":["5.02","9.01"],"event_type":"leadership","sentiment":"neutral","materiality_score":0.5,"calibrated_materiality_score":0.5,"confidence":"high","headline":"Grayscale appoints Diana Zhang as COO, effective May 6; Hugh Ross steps down","bullets":["Diana Zhang named COO of Grayscale Investments, effective May 6, 2025, succeeding Hugh Ross.","Zhang brings 18+ years of experience, including executive roles at Bridgewater Associates and BlockTower Capital.","Hugh Ross, COO since 2021, will assist transition until his departure by May 31, 2025.","Zhang will report to CEO Peter Mintzberg and help expand institutional partnerships."],"urls":{"canonical":"https://secwatch.observer/filing/0000950103-25-004588","json":"https://secwatch.observer/filing/0000950103-25-004588.json","markdown":"https://secwatch.observer/filing/0000950103-25-004588.md","text":"https://secwatch.observer/filing/0000950103-25-004588.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1588489/000095010325004588/0000950103-25-004588-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1588489/000095010325004588/dp227434_8k-gbtc.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-05-23T18:20:08.348982+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":[{"claim_id":"284064942b","claim":"Diana Zhang was appointed as Chief Operating Officer at Grayscale Bitcoin Trust ETF.","evidence_excerpt":"the appointment of Diana Zhang to serve as the new Chief Operating Officer of Grayscale Operating, LLC, effective May 6, 2025.","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1588489/000095010325004588/0000950103-25-004588-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"appointed"},{"label":"Role","value":"Chief Operating Officer"}],"fact_type":"executive_change"},{"claim_id":"fd37c4b7ec","claim":"Hugh Ross departed as Chief Operating Officer at Grayscale Bitcoin Trust ETF.","evidence_excerpt":"Ms. Zhang will succeed Hugh Ross, the current Chief Operating Officer of Grayscale Operating, LLC, who has decided to step down from his position and is expected to remain with Grayscale to assist with the transition of his responsibilities until his departure on or prior to May 31, 2025.","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1588489/000095010325004588/0000950103-25-004588-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"stepped down"},{"label":"Role","value":"Chief Operating Officer"}],"fact_type":"executive_change"}],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}