---
schema_version: "secwatch.filing_event.v1"
accession: "0000950170-23-029623"
form_type: "8-K"
ticker: "ETCG"
cik: "0001705181"
company_name: "Grayscale Ethereum Classic Trust (ETC)"
filed_at: "2023-06-23T23:59:59+00:00"
generated_at: "2026-06-13T18:10:46.034127+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.3
calibrated_materiality_score: 0.3
confidence: "high"
source: SEC EDGAR
---

# Grayscale Ethereum Classic Trust extends index license agreement with CoinDesk Indices to February 2025

## Summary
- Amendment extends Index License Agreement term from Feb 29, 2024 to Feb 28, 2025.
- Agreement governs use of CoinDesk Ether Classic Price Index (ECX) for Index Price calculation.
- Confidential operational milestones and fee discounts included but redacted as non-material.

## SEC filing metadata
- accession: 0000950170-23-029623
- form_type: 8-K
- ticker: ETCG
- cik: 0001705181
- company_name: Grayscale Ethereum Classic Trust (ETC)
- filed_at: 2023-06-23T23:59:59+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.3
- calibrated_materiality_score: 0.3
- confidence: high
- sec_items: 1.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1705181/000095017023029623/0000950170-23-029623-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1705181/000095017023029623/etcg-20230620.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000950170-23-029623
- JSON: https://secwatch.observer/filing/0000950170-23-029623.json
- Plain text: https://secwatch.observer/filing/0000950170-23-029623.txt

## Key facts
- Material Agreements
  Grayscale Ethereum Classic Trust (ETC) amended Amendment to Index License Agreement 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 Ethereum Classic Trust (ETC) (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 Ether Classic Price Index (ECX) (the “Index”) to calculate the Index Price, among other things.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1705181/000095017023029623/0000950170-23-029623-index.htm

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