---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-26-147613"
form_type: "8-K"
ticker: "HKHC"
cik: "0000088000"
company_name: "Horizon Kinetics Holding Corp"
filed_at: "2026-04-08T23:59:59+00:00"
generated_at: "2026-05-15T06:57:51.012380+00:00"
event_type: "leadership"
sentiment: "negative"
materiality_score: 0.75
calibrated_materiality_score: 0.75
confidence: "high"
source: SEC EDGAR
---

# CEO Murray Stahl dies; Bregman and Doyle named Co-CEOs

## Summary
- Murray Stahl, Chairman and CEO, passed away suddenly on April 7, 2026.
- Steven Bregman and Peter Doyle appointed as Co-Chief Executive Officers.
- New Founders' Committee formed with co-founder Tom Ewing to oversee transition.
- Company has ~$600M market cap and debt-free balance sheet per press release.

## SEC filing metadata
- accession: 0001193125-26-147613
- form_type: 8-K
- ticker: HKHC
- cik: 0000088000
- company_name: Horizon Kinetics Holding Corp
- filed_at: 2026-04-08T23:59:59+00:00
- event_type: leadership
- sentiment: negative
- materiality_score: 0.75
- calibrated_materiality_score: 0.75
- confidence: high
- sec_items: 5.02, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/88000/000119312526147613/0001193125-26-147613-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/88000/000119312526147613/hkhc-20260407.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-26-147613
- JSON: https://secwatch.observer/filing/0001193125-26-147613.json
- Plain text: https://secwatch.observer/filing/0001193125-26-147613.txt

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