---
schema_version: "secwatch.filing_event.v1"
accession: "0000950103-25-004590"
form_type: "8-K"
ticker: "HZEN"
cik: "0001748945"
company_name: "Grayscale Horizen Trust (ZEN)"
filed_at: "2025-04-09T23:59:59+00:00"
generated_at: "2026-05-23T18:29:13.235174+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.5
calibrated_materiality_score: 0.5
confidence: "high"
source: SEC EDGAR
---

# Grayscale appoints Diana Zhang as new COO; prior COO Hugh Ross to depart by May 31

## Summary
- Diana Zhang appointed Chief Operating Officer of Grayscale Operating, LLC effective May 6, 2025.
- Zhang succeeds Hugh Ross, who has served as COO since 2021 and will remain through May 31 for transition.
- Zhang brings 18+ years of asset management experience, including executive roles at Bridgewater Associates and BlockTower Capital.
- Grayscale is the world's largest crypto-focused asset management platform, sponsor of Grayscale Horizen Trust (HZEN).

## SEC filing metadata
- accession: 0000950103-25-004590
- form_type: 8-K
- ticker: HZEN
- cik: 0001748945
- company_name: Grayscale Horizen Trust (ZEN)
- filed_at: 2025-04-09T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.5
- calibrated_materiality_score: 0.5
- confidence: high
- sec_items: 5.02, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1748945/000095010325004590/0000950103-25-004590-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1748945/000095010325004590/dp227437_8k-hzen.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000950103-25-004590
- JSON: https://secwatch.observer/filing/0000950103-25-004590.json
- Plain text: https://secwatch.observer/filing/0000950103-25-004590.txt

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