---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-25-239011"
form_type: "8-K"
ticker: "ZCSH"
cik: "0001720265"
company_name: "Grayscale Zcash Trust (ZEC)"
filed_at: "2025-10-14T23:59:59+00:00"
generated_at: "2026-05-17T03:55:15.532013+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.3
calibrated_materiality_score: 0.3
confidence: "high"
source: SEC EDGAR
---

# Grayscale Zcash Trust sponsor appoints Simon Koster as Director, replacing Matthew Kummell

## Summary
- Matthew Kummell stepped down as Director of GSOIH, the sole managing member of Grayscale Operating, LLC, effective October 13, 2025.
- Simon Koster appointed as Director of GSOIH on October 13, 2025; Koster is Chief Strategy Officer at Digital Currency Group (DCG).
- Koster manages DCG's portfolio of digital assets and over 250 early-stage companies globally.
- Koster has served on boards of Foundry and Luno since 2023, Fortitude since 2024, and Yuma since 2025, all affiliated with Grayscale.

## SEC filing metadata
- accession: 0001193125-25-239011
- form_type: 8-K
- ticker: ZCSH
- cik: 0001720265
- company_name: Grayscale Zcash Trust (ZEC)
- filed_at: 2025-10-14T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.3
- calibrated_materiality_score: 0.3
- confidence: high
- sec_items: 5.02
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1720265/000119312525239011/0001193125-25-239011-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1720265/000119312525239011/zcsh-20251013.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-25-239011
- JSON: https://secwatch.observer/filing/0001193125-25-239011.json
- Plain text: https://secwatch.observer/filing/0001193125-25-239011.txt

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