---
schema_version: "secwatch.filing_event.v1"
accession: "0001104659-25-016145"
form_type: "8-K"
ticker: "MBIO"
cik: "0001680048"
company_name: "MUSTANG BIO, INC."
filed_at: "2025-02-21T23:59:59+00:00"
generated_at: "2026-05-26T06:58:55.644718+00:00"
event_type: "other_material"
sentiment: "negative"
materiality_score: 0.7
calibrated_materiality_score: 0.15
confidence: "high"
source: SEC EDGAR
---

# Mustang Bio shareholders approve issuance of up to 5.48M shares underlying warrants

## Summary
- Written consent signed by holders of ~56% of voting power authorizing warrant share issuance under Nasdaq Rule 5635(d).
- Issuance covers up to 5,475,082 shares of common stock underlying warrants issued to H.C. Wainwright & Co. and accredited investors.
- Consent holders: 131,052 common shares and 250,000 Class A Preferred shares (each with ~8.4 votes).
- Definitive information statement on Schedule 14C to be filed and sent to stockholders.

## SEC filing metadata
- accession: 0001104659-25-016145
- form_type: 8-K
- ticker: MBIO
- cik: 0001680048
- company_name: MUSTANG BIO, INC.
- filed_at: 2025-02-21T23:59:59+00:00
- event_type: other_material
- sentiment: negative
- materiality_score: 0.7
- calibrated_materiality_score: 0.15
- confidence: high
- sec_items: 5.07
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1680048/000110465925016145/0001104659-25-016145-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1680048/000110465925016145/tm257187d1_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001104659-25-016145
- JSON: https://secwatch.observer/filing/0001104659-25-016145.json
- Plain text: https://secwatch.observer/filing/0001104659-25-016145.txt

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