---
schema_version: "secwatch.filing_event.v1"
accession: "0001558370-23-002778"
form_type: "8-K"
ticker: "MBIO"
cik: "0001680048"
company_name: "MUSTANG BIO, INC."
filed_at: "2023-03-03T23:59:59+00:00"
generated_at: "2026-06-18T13:13:03.254168+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.6
calibrated_materiality_score: 0.6
confidence: "high"
source: SEC EDGAR
---

# Mustang Bio shareholders authorize board to effect reverse stock split up to 20:1

## Summary
- Holders of ~62.2% voting power signed written consent approving reverse stock split.
- Board authorized to set ratio between 5:1 and 20:1, with split to occur before Jan 31, 2024.
- Consent signed by holders of 22,630,620 common shares and 250,000 Class A Preferred shares.
- Board also approved the reverse stock split and amendment to certificate of incorporation.

## SEC filing metadata
- accession: 0001558370-23-002778
- form_type: 8-K
- ticker: MBIO
- cik: 0001680048
- company_name: MUSTANG BIO, INC.
- filed_at: 2023-03-03T23:59:59+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.6
- calibrated_materiality_score: 0.6
- confidence: high
- sec_items: 5.07
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1680048/000155837023002778/0001558370-23-002778-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1680048/000155837023002778/tmb-20230303x8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001558370-23-002778
- JSON: https://secwatch.observer/filing/0001558370-23-002778.json
- Plain text: https://secwatch.observer/filing/0001558370-23-002778.txt

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