---
schema_version: "secwatch.filing_event.v1"
accession: "0000950170-23-029611"
form_type: "8-K"
ticker: "GBTC"
cik: "0001588489"
company_name: "Grayscale Bitcoin Trust ETF"
filed_at: "2023-06-23T23:59:59+00:00"
generated_at: "2026-06-13T18:01:50.327614+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.2
calibrated_materiality_score: 0.2
confidence: "high"
source: SEC EDGAR
---

# Grayscale Bitcoin Trust extends CoinDesk index license to Feb 2025

## Summary
- Term of Index License Agreement extended from Feb 29, 2024 to Feb 28, 2025.
- Amendment updates operational milestones (redacted as confidential).
- Agreement governs use of CoinDesk Bitcoin Price Index (XBX) for Index Price.

## SEC filing metadata
- accession: 0000950170-23-029611
- form_type: 8-K
- ticker: GBTC
- cik: 0001588489
- company_name: Grayscale Bitcoin Trust ETF
- filed_at: 2023-06-23T23:59:59+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.2
- calibrated_materiality_score: 0.2
- confidence: high
- sec_items: 1.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1588489/000095017023029611/0000950170-23-029611-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1588489/000095017023029611/gbtc-20230620.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000950170-23-029611
- JSON: https://secwatch.observer/filing/0000950170-23-029611.json
- Plain text: https://secwatch.observer/filing/0000950170-23-029611.txt

## Key facts
- Material Agreements
  Grayscale Bitcoin Trust ETF amended Amendment with CoinDesk Indices, Inc. (effective 2023-06-20).
  - Action: amendment
  - Agreement: license
  - Counterparty: CoinDesk Indices, Inc.
  - Effective: 2023-06-20
  source text: On June 20, 2023, Grayscale Investments, LLC, the sponsor (the “Sponsor”) of Grayscale Bitcoin Trust (BTC) (the “Trust”), and CoinDesk Indices, Inc. (the “Index Provider”), entered into an Amendment (the “Amendment”) to the Index License Agreement dated January 31, 2022, between the Sponsor and the Index Provider (the “Index License Agreement”) governing the Sponsor’s use of the CoinDesk Bitcoin Price Index (XBX) (the “Index”) to calculate the Index Price, among other things.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1588489/000095017023029611/0000950170-23-029611-index.htm

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