---
schema_version: "secwatch.filing_event.v1"
accession: "0000950170-25-089984"
form_type: "8-K"
ticker: "BTC"
cik: "0002015034"
company_name: "Grayscale Bitcoin Mini Trust ETF"
filed_at: "2025-06-25T23:59:59+00:00"
generated_at: "2026-05-18T21:30:41.790258+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.35
calibrated_materiality_score: 0.35
confidence: "high"
source: SEC EDGAR
---

# Grayscale Bitcoin Mini Trust ETF adds Bitfinex to CoinDesk Bitcoin Price Index effective June 22, 2025

## Summary
- Effective June 22, 2025, CoinDesk Indices added Bitfinex to the CoinDesk Bitcoin Price Index (XBX) after it met minimum liquidity requirements.
- No constituent trading platforms were removed during the Index Provider's scheduled quarterly review.
- The Index now includes seven platforms: Coinbase, Kraken, Bitstamp, Crypto.com, LMAX Digital, Bullish, and Bitfinex.
- The Index Provider may change trading venues or calculation methods at any time, with scheduled quarterly reviews.

## SEC filing metadata
- accession: 0000950170-25-089984
- form_type: 8-K
- ticker: BTC
- cik: 0002015034
- company_name: Grayscale Bitcoin Mini Trust ETF
- filed_at: 2025-06-25T23:59:59+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.35
- calibrated_materiality_score: 0.35
- confidence: high
- sec_items: 8.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/2015034/000095017025089984/0000950170-25-089984-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/2015034/000095017025089984/btc-20250622.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000950170-25-089984
- JSON: https://secwatch.observer/filing/0000950170-25-089984.json
- Plain text: https://secwatch.observer/filing/0000950170-25-089984.txt

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