---
schema_version: "secwatch.filing_event.v1"
accession: "0000950170-25-101661"
form_type: "8-K"
ticker: "BTC"
cik: "0002015034"
company_name: "Grayscale Bitcoin Mini Trust ETF"
filed_at: "2025-08-04T23:59:59+00:00"
generated_at: "2026-05-17T21:37:51.563364+00:00"
event_type: "leadership"
sentiment: "positive"
materiality_score: 0.55
calibrated_materiality_score: 0.55
confidence: "high"
source: SEC EDGAR
---

# Grayscale appoints Barry Silbert as Board Chairman; adds four C-level execs

## Summary
- Barry Silbert returns as Board Chairman; Mark Shifke steps down as Chairman but remains Director.
- Diana Zhang (ex-Bridgewater/BlockTower) appointed COO; Ramona Boston (ex-Apollo) named CMO.
- Andrea Williams (ex-Goldman Sachs) becomes CCO; Maxwell Rosenthal (ex-Citadel) appointed CHRO.
- Grayscale now manages over $35B in AUM across 40+ products, including Bitcoin and Ethereum ETFs.
- Company is considering expanding the Board further with independent directors.

## SEC filing metadata
- accession: 0000950170-25-101661
- form_type: 8-K
- ticker: BTC
- cik: 0002015034
- company_name: Grayscale Bitcoin Mini Trust ETF
- filed_at: 2025-08-04T23:59:59+00:00
- event_type: leadership
- sentiment: positive
- materiality_score: 0.55
- calibrated_materiality_score: 0.55
- confidence: high
- sec_items: 5.02, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/2015034/000095017025101661/0000950170-25-101661-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/2015034/000095017025101661/btc-20250804.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000950170-25-101661
- JSON: https://secwatch.observer/filing/0000950170-25-101661.json
- Plain text: https://secwatch.observer/filing/0000950170-25-101661.txt

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.