---
schema_version: "secwatch.filing_event.v1"
accession: "0001493152-23-015785"
form_type: "8-K"
ticker: "SLNH"
cik: "0000064463"
company_name: "Soluna Holdings, Inc"
filed_at: "2023-05-08T23:59:59+00:00"
generated_at: "2026-06-15T14:42:36.886302+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.65
calibrated_materiality_score: 0.65
confidence: "high"
source: SEC EDGAR
---

# John Belizaire appointed CEO of Soluna Holdings; Toporek becomes Executive Chairman

## Summary
- Effective May 1, 2023, John Belizaire becomes CEO of Soluna Holdings, Inc., in addition to his role as CEO of Soluna Computing.
- Michael Toporek resigned as CEO and was elected Executive Chairman of the Board, succeeding William Phelan.
- William Phelan becomes Lead Independent Director as part of the planned succession.
- The transition was previously announced on March 20, 2023, and is effective immediately.

## SEC filing metadata
- accession: 0001493152-23-015785
- form_type: 8-K
- ticker: SLNH
- cik: 0000064463
- company_name: Soluna Holdings, Inc
- filed_at: 2023-05-08T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.65
- calibrated_materiality_score: 0.65
- confidence: high
- sec_items: 5.02, 7.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/64463/000149315223015785/0001493152-23-015785-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/64463/000149315223015785/form8-k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001493152-23-015785
- JSON: https://secwatch.observer/filing/0001493152-23-015785.json
- Plain text: https://secwatch.observer/filing/0001493152-23-015785.txt

## Key facts
- Executive change
  Michael Toporek was elected as Executive Chairman of the Board at Soluna Holdings, Inc.
  - Action: elected
  - Role: Executive Chairman of the Board
  source text: Michael Toporek, the Company’s prior Chief Executive Officer, has been elected to serve as Executive Chairman of the Board of Directors, effective as of May 1, 2023.
  evidence_url: https://www.sec.gov/Archives/edgar/data/64463/000149315223015785/0001493152-23-015785-index.htm
- Executive change
  John Belizaire was appointed as Chief Executive Officer at Soluna Holdings, Inc.
  - Action: appointed
  - Role: Chief Executive Officer
  source text: The Company has appointed John Belizaire, the Chief Executive Officer of the Company’s Soluna Computing, Inc. subsidiary (“SCI’) and a current director of the Company, to serve as the Chief Executive Officer of the Company, effective as of May 1, 2023.
  evidence_url: https://www.sec.gov/Archives/edgar/data/64463/000149315223015785/0001493152-23-015785-index.htm
- Executive change
  Michael Toporek resigned as Chief Executive Officer at Soluna Holdings, Inc.
  - Action: resigned
  - Role: Chief Executive Officer
  source text: Effective as of May 1, 2023, Michael Toporek resigned as Chief Executive Officer of Soluna Holdings, Inc. (the “Company”) in connection with the appointment of John Belizaire as Chief Executive Officer as part of the Company’s previously announced succession plan.
  evidence_url: https://www.sec.gov/Archives/edgar/data/64463/000149315223015785/0001493152-23-015785-index.htm

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