---
schema_version: "secwatch.filing_event.v1"
accession: "0000950170-23-011995"
form_type: "8-K"
ticker: "HZEN"
cik: "0001748945"
company_name: "Grayscale Horizen Trust (ZEN)"
filed_at: "2023-04-06T23:59:59+00:00"
generated_at: "2026-06-17T05:15:39.309549+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.2
calibrated_materiality_score: 0.2
confidence: "high"
source: SEC EDGAR
---

# Grayscale Horizen Trust adds Bittrex to reference rate constituent exchanges

## Summary
- Effective April 4, 2023, Bittrex added to CoinDesk Horizen Reference Rate.
- No exchanges removed; now includes Coinbase Pro, Binance.US, and Bittrex.
- Change results from scheduled quarterly review meeting liquidity criteria.
- Reference Rate Provider may change venues or calculation method at any time.

## SEC filing metadata
- accession: 0000950170-23-011995
- form_type: 8-K
- ticker: HZEN
- cik: 0001748945
- company_name: Grayscale Horizen Trust (ZEN)
- filed_at: 2023-04-06T23:59:59+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.2
- calibrated_materiality_score: 0.2
- confidence: high
- sec_items: 8.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1748945/000095017023011995/0000950170-23-011995-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1748945/000095017023011995/hzen-20230404.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000950170-23-011995
- JSON: https://secwatch.observer/filing/0000950170-23-011995.json
- Plain text: https://secwatch.observer/filing/0000950170-23-011995.txt

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