---
schema_version: "secwatch.filing_event.v1"
accession: "0000950170-22-000299"
form_type: "8-K"
ticker: "ETCG"
cik: "0001705181"
company_name: "Grayscale Ethereum Classic Trust (ETC)"
filed_at: "2022-01-13T23:59:59+00:00"
generated_at: "2026-06-27T18:16:50.569449+00:00"
event_type: "other"
sentiment: "neutral"
materiality_score: 0.25
calibrated_materiality_score: 0.25
confidence: "high"
source: SEC EDGAR
---

# Grayscale Ethereum Classic Trust amends ETC valuation cascade rules

## Summary
- Sponsor updated cascading rules for determining Index Price effective Jan 11, 2022.
- Primary source: CoinDesk ECX Index; falls back to Coin Metrics Real-Time Rate.
- Third fallback: spot price from principal market; last resort: Sponsor good faith estimate.
- All determinations made in Sponsor's sole discretion with no predefined criteria.
- Change disclosed under Item 8.01; no impact on financial statements or NAV.

## SEC filing metadata
- accession: 0000950170-22-000299
- form_type: 8-K
- ticker: ETCG
- cik: 0001705181
- company_name: Grayscale Ethereum Classic Trust (ETC)
- filed_at: 2022-01-13T23:59:59+00:00
- event_type: other
- sentiment: neutral
- materiality_score: 0.25
- calibrated_materiality_score: 0.25
- confidence: high
- sec_items: 8.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1705181/000095017022000299/0000950170-22-000299-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1705181/000095017022000299/etcg-20220111.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000950170-22-000299
- JSON: https://secwatch.observer/filing/0000950170-22-000299.json
- Plain text: https://secwatch.observer/filing/0000950170-22-000299.txt

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