---
schema_version: "secwatch.filing_event.v1"
accession: "0001104659-24-069131"
form_type: "8-K"
ticker: "MBIO"
cik: "0001680048"
company_name: "MUSTANG BIO, INC."
filed_at: "2024-06-06T23:59:59+00:00"
generated_at: "2026-06-01T05:55:48.219826+00:00"
event_type: "other"
sentiment: "neutral"
materiality_score: 0.4
calibrated_materiality_score: 0.4
confidence: "high"
source: SEC EDGAR
---

# Mustang Bio enters $5.6M ATM offering with H.C. Wainwright; terminates prior $100M agreement

## Summary
- May 31, 2024: ATM Offering Agreement with H.C. Wainwright for up to $5.6M of common stock; 3.0% commission to manager.
- Prior $100M ATM Sales Agreement with B. Riley Securities & others terminated effective June 5, 2024.
- New S-3 registration statement (File No. 333-279891) filed same day enables the at-the-market offering.
- Company not obligated to sell any shares; offering ends upon full sale or termination of agreement.

## SEC filing metadata
- accession: 0001104659-24-069131
- form_type: 8-K
- ticker: MBIO
- cik: 0001680048
- company_name: MUSTANG BIO, INC.
- filed_at: 2024-06-06T23:59:59+00:00
- event_type: other
- sentiment: neutral
- materiality_score: 0.4
- calibrated_materiality_score: 0.4
- confidence: high
- sec_items: 1.01, 1.02, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1680048/000110465924069131/0001104659-24-069131-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1680048/000110465924069131/tm2416600d1_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001104659-24-069131
- JSON: https://secwatch.observer/filing/0001104659-24-069131.json
- Plain text: https://secwatch.observer/filing/0001104659-24-069131.txt

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