---
schema_version: "secwatch.filing_event.v1"
accession: "0000950170-23-014586"
form_type: "8-K"
ticker: "HZEN"
cik: "0001748945"
company_name: "Grayscale Horizen Trust (ZEN)"
filed_at: "2023-04-26T23:59:59+00:00"
generated_at: "2026-06-16T13:17:32.920115+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.3
calibrated_materiality_score: 0.3
confidence: "high"
source: SEC EDGAR
---

# Grayscale Horizen Trust removes Bittrex from reference rate; now uses Coinbase Pro and Binance.US

## Summary
- Bittrex removed from CoinDesk Horizen Reference Rate due to ceasing U.S. customer service.
- No new exchanges added; current constituents: Coinbase Pro and Binance.US.
- Change effective April 21, 2023; quarterly reviews may alter constituents.
- Reference Rate Provider may change venues or calculation method at any time.

## SEC filing metadata
- accession: 0000950170-23-014586
- form_type: 8-K
- ticker: HZEN
- cik: 0001748945
- company_name: Grayscale Horizen Trust (ZEN)
- filed_at: 2023-04-26T23:59:59+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.3
- calibrated_materiality_score: 0.3
- confidence: high
- sec_items: 8.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1748945/000095017023014586/0000950170-23-014586-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1748945/000095017023014586/hzen-20230421.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000950170-23-014586
- JSON: https://secwatch.observer/filing/0000950170-23-014586.json
- Plain text: https://secwatch.observer/filing/0000950170-23-014586.txt

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