---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-22-028546"
form_type: "8-K"
ticker: "ETCG"
cik: "0001705181"
company_name: "Grayscale Ethereum Classic Trust (ETC)"
filed_at: "2022-02-04T23:59:59+00:00"
generated_at: "2026-06-27T11:08:08.340541+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.5
calibrated_materiality_score: 0.5
confidence: "high"
source: SEC EDGAR
---

# ETCG switches to simpler index price calculation for ETC valuation

## Summary
- Effective Feb 1, 2022, Trust uses Index Price without prior additional averaging mechanism; aims for greater transparency.
- Average historical difference between old and new index prices was 0.08% for period 2019–2021.
- New Index License Agreement with CoinDesk Indices executed; prior 2019 agreement terminated.
- Index constituent exchanges and fallback pricing hierarchy remain unchanged.
- GAAP NAV continues using Coinbase Pro price; Index Price is non-GAAP and not used in financial statements.

## SEC filing metadata
- accession: 0001193125-22-028546
- form_type: 8-K
- ticker: ETCG
- cik: 0001705181
- company_name: Grayscale Ethereum Classic Trust (ETC)
- filed_at: 2022-02-04T23:59:59+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.5
- calibrated_materiality_score: 0.5
- confidence: high
- sec_items: 1.01, 1.02, 8.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1705181/000119312522028546/0001193125-22-028546-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1705181/000119312522028546/d437099d8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-22-028546
- JSON: https://secwatch.observer/filing/0001193125-22-028546.json
- Plain text: https://secwatch.observer/filing/0001193125-22-028546.txt

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