---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-25-236071"
form_type: "8-K"
ticker: "BTC"
cik: "0002015034"
company_name: "Grayscale Bitcoin Mini Trust ETF"
filed_at: "2025-10-09T23:59:59+00:00"
generated_at: "2026-05-17T04:14:43.569490+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.15
calibrated_materiality_score: 0.15
confidence: "high"
source: SEC EDGAR
---

# Grayscale Bitcoin Mini Trust ETF enters new Prime Broker Agreement with Coinbase, new fund admin agreement with BNY

## Summary
- On Oct 3, 2025, Trust entered new Prime Broker Agreement with Coinbase, Inc. and Coinbase Custody Trust Company.
- Previous Prime Broker Agreement with Coinbase (dated May 2, 2024) terminated effective Oct 3, 2025.
- New Fund Administration and Accounting Agreement with BNY Mellon effective Oct 9, 2025.
- Previous fund administration agreement with BNY (dated Feb 26, 2024) terminated effective Oct 9, 2025.
- No changes to Trust's operations or Bitcoin holdings; agreements govern custodial and administrative services.

## SEC filing metadata
- accession: 0001193125-25-236071
- form_type: 8-K
- ticker: BTC
- cik: 0002015034
- company_name: Grayscale Bitcoin Mini Trust ETF
- filed_at: 2025-10-09T23:59:59+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.15
- calibrated_materiality_score: 0.15
- confidence: high
- sec_items: 1.01, 1.02, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/2015034/000119312525236071/0001193125-25-236071-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/2015034/000119312525236071/btc-20251003.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-25-236071
- JSON: https://secwatch.observer/filing/0001193125-25-236071.json
- Plain text: https://secwatch.observer/filing/0001193125-25-236071.txt

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