---
schema_version: "secwatch.filing_event.v1"
accession: "0001104659-25-018299"
form_type: "8-K"
ticker: "MBIO"
cik: "0001680048"
company_name: "MUSTANG BIO, INC."
filed_at: "2025-02-27T23:59:59+00:00"
generated_at: "2026-05-26T02:07:58.988844+00:00"
event_type: "m_and_a"
sentiment: "neutral"
materiality_score: 0.5
calibrated_materiality_score: 0.5
confidence: "high"
source: SEC EDGAR
---

# Mustang Bio sells fixed assets to AbbVie for $1M, exits Worcester facility

## Summary
- Closed sale of furniture, fixtures, equipment to AbbVie for $1.0M; lease terminated.
- Exits manufacturing facility in Worcester, MA; corporate HQ moved to Waltham, MA.
- Expects ~$2.0M cash savings over 24 months from lease termination.
- Plans to rely on academic partners and contract manufacturers for clinical trials.
- Aims to initiate MB-109 (HSV-1 oncolytic virus + CAR-T) trial for GBM in H2 2025.

## SEC filing metadata
- accession: 0001104659-25-018299
- form_type: 8-K
- ticker: MBIO
- cik: 0001680048
- company_name: MUSTANG BIO, INC.
- filed_at: 2025-02-27T23:59:59+00:00
- event_type: m_and_a
- sentiment: neutral
- materiality_score: 0.5
- calibrated_materiality_score: 0.5
- confidence: high
- sec_items: 2.01, 8.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1680048/000110465925018299/0001104659-25-018299-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1680048/000110465925018299/tm257773d1_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001104659-25-018299
- JSON: https://secwatch.observer/filing/0001104659-25-018299.json
- Plain text: https://secwatch.observer/filing/0001104659-25-018299.txt

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