---
schema_version: "secwatch.filing_event.v1"
accession: "0000950103-24-006874"
form_type: "8-K"
ticker: "HZEN"
cik: "0001748945"
company_name: "Grayscale Horizen Trust (ZEN)"
filed_at: "2024-05-20T23:59:59+00:00"
generated_at: "2026-06-01T13:08:39.748113+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.7
calibrated_materiality_score: 0.7
confidence: "high"
source: SEC EDGAR
---

# Grayscale Horizen Trust sponsor CEO transition: Peter Mintzberg to succeed Sonnenshein

## Summary
- Peter Mintzberg appointed CEO of Grayscale Investments, effective August 15, 2024; Michael Sonnenshein steps down immediately.
- Edward McGee, CFO, will serve as interim principal executive officer until Mintzberg's start date.
- Mintzberg joins from Goldman Sachs (Global Head of Strategy, Asset & Wealth Management); prior roles at BlackRock, Invesco.
- Sonnenshein grew AUM from $60M to ~$30B and led court victory enabling first spot Bitcoin ETF uplisting.

## SEC filing metadata
- accession: 0000950103-24-006874
- form_type: 8-K
- ticker: HZEN
- cik: 0001748945
- company_name: Grayscale Horizen Trust (ZEN)
- filed_at: 2024-05-20T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.7
- calibrated_materiality_score: 0.7
- confidence: high
- sec_items: 5.02, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1748945/000095010324006874/0000950103-24-006874-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1748945/000095010324006874/dp211409_8k-hzen.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000950103-24-006874
- JSON: https://secwatch.observer/filing/0000950103-24-006874.json
- Plain text: https://secwatch.observer/filing/0000950103-24-006874.txt

## Key facts
- Executive change
  Peter Mintzberg was appointed as Chief Executive Officer at Grayscale Horizen Trust (ZEN).
  - Action: appointed
  - Role: Chief Executive Officer
  source text: On May 20, 2024, Grayscale Investments, LLC (“Grayscale”), the sponsor of Grayscale Horizen Trust (ZEN) (the “Company”), announced that it has approved the appointment of Peter Mintzberg to serve as Grayscale’s new Chief Executive Officer and the principal executive officer of the Company, and a member of the Board of Directors of Grayscale, effective August 15, 2024.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1748945/000095010324006874/0000950103-24-006874-index.htm
- Executive change
  Edward McGee changed role as interim principal executive officer at Grayscale Horizen Trust (ZEN).
  - Action: serving as interim
  - Role: interim principal executive officer
  source text: Mr. Edward McGee, the Chief Financial Officer of Grayscale and principal financial officer of the Company, will serve as principal executive officer on an interim basis until Mr. Mintzberg’s commencement date.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1748945/000095010324006874/0000950103-24-006874-index.htm
- Executive change
  Michael Sonnenshein departed as Chief Executive Officer at Grayscale Horizen Trust (ZEN).
  - Action: stepped down
  - Role: Chief Executive Officer
  source text: Mr. Mintzberg will succeed Michael Sonnenshein, the current Chief Executive Officer of Grayscale and the principal executive officer of the Company, who has decided to step down from his position, effective immediately.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1748945/000095010324006874/0000950103-24-006874-index.htm

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