---
schema_version: "secwatch.filing_event.v1"
accession: "0001104659-25-004565"
form_type: "8-K"
ticker: "MBIO"
cik: "0001680048"
company_name: "MUSTANG BIO, INC."
filed_at: "2025-01-17T23:59:59+00:00"
generated_at: "2026-05-27T23:17:12.640064+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.5
calibrated_materiality_score: 0.5
confidence: "high"
source: SEC EDGAR
---

# Mustang Bio effects 1-for-50 reverse stock split to regain Nasdaq compliance

## Summary
- Outstanding shares reduced from ~64.8M to ~1.3M; split effective Jan 15, 2025.
- Trading on split-adjusted basis under symbol MBIO begins Jan 16, 2025.
- Reverse split intended to meet Nasdaq's $1.00 minimum bid price requirement.
- No fractional shares issued; cash payment in lieu for fractional entitlements.
- New CUSIP 62818Q302; board set final ratio on Jan 6, 2025 per prior stockholder approval.

## SEC filing metadata
- accession: 0001104659-25-004565
- form_type: 8-K
- ticker: MBIO
- cik: 0001680048
- company_name: MUSTANG BIO, INC.
- filed_at: 2025-01-17T23:59:59+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.5
- calibrated_materiality_score: 0.5
- confidence: high
- sec_items: 3.03, 5.03, 8.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1680048/000110465925004565/0001104659-25-004565-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1680048/000110465925004565/tm253736d1_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001104659-25-004565
- JSON: https://secwatch.observer/filing/0001104659-25-004565.json
- Plain text: https://secwatch.observer/filing/0001104659-25-004565.txt

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