---
schema_version: "secwatch.filing_event.v1"
accession: "0001104659-25-002599"
form_type: "8-K"
ticker: "MBIO"
cik: "0001680048"
company_name: "MUSTANG BIO, INC."
filed_at: "2025-01-10T23:59:59+00:00"
generated_at: "2026-05-28T05:12:28.947239+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.7
calibrated_materiality_score: 0.15
confidence: "high"
source: SEC EDGAR
---

# Mustang Bio stockholders authorize issuance of up to 34.8M shares underlying warrants

## Summary
- Stockholders representing ~57% voting power executed written consent approving warrant share issuance.
- Up to 34,767,934 shares of common stock may be issued under warrants to an institutional investor and H.C. Wainwright.
- Issuance complies with Nasdaq Listing Rule 5635(d) for transactions exceeding 20% of outstanding shares.
- Consent includes 6,552,781 common shares and 250,000 Class A Preferred shares (each with 285 votes).
- Previously disclosed Inducement Letter (Oct 24, 2024) and Engagement Letter (Oct 23, 2024) are the basis.

## SEC filing metadata
- accession: 0001104659-25-002599
- form_type: 8-K
- ticker: MBIO
- cik: 0001680048
- company_name: MUSTANG BIO, INC.
- filed_at: 2025-01-10T23:59:59+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.7
- calibrated_materiality_score: 0.15
- confidence: high
- sec_items: 5.07
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1680048/000110465925002599/0001104659-25-002599-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1680048/000110465925002599/tm252981d1_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001104659-25-002599
- JSON: https://secwatch.observer/filing/0001104659-25-002599.json
- Plain text: https://secwatch.observer/filing/0001104659-25-002599.txt

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