---
schema_version: "secwatch.filing_event.v1"
accession: "0001104659-23-079819"
form_type: "8-K"
ticker: "MBIO"
cik: "0001680048"
company_name: "MUSTANG BIO, INC."
filed_at: "2023-07-11T23:59:59+00:00"
generated_at: "2026-06-13T10:06:50.403367+00:00"
event_type: "other_material"
sentiment: "negative"
materiality_score: 0.6
calibrated_materiality_score: 0.6
confidence: "high"
source: SEC EDGAR
---

# Mustang Bio terminates UCLA license for PSCA CAR T program, ends MB-105 development

## Summary
- Terminated UCLA License Agreement for PSCA CAR T technology, effective ~Aug 9, 2023.
- No early termination penalties incurred.
- Previously terminated PSCA Technology License with City of Hope on May 17, 2023.
- Licensed technology targeted prostate cancer, pancreatic cancer, and other solid tumors.

## SEC filing metadata
- accession: 0001104659-23-079819
- form_type: 8-K
- ticker: MBIO
- cik: 0001680048
- company_name: MUSTANG BIO, INC.
- filed_at: 2023-07-11T23:59:59+00:00
- event_type: other_material
- sentiment: negative
- materiality_score: 0.6
- calibrated_materiality_score: 0.6
- confidence: high
- sec_items: 1.02
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1680048/000110465923079819/0001104659-23-079819-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1680048/000110465923079819/tm2320991d1_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001104659-23-079819
- JSON: https://secwatch.observer/filing/0001104659-23-079819.json
- Plain text: https://secwatch.observer/filing/0001104659-23-079819.txt

## Key facts
- Material Agreements
  MUSTANG BIO, INC. terminated UCLA License Agreement with Regents of the University of California (effective 2023-07-10).
  - Action: termination
  - Agreement: license
  - Counterparty: Regents of the University of California
  - Effective: 2023-07-10
  source text: on July 10, 2023, the Company terminated the Exclusive License Agreement, dated as of March 17, 2017, by and between the Company and the Regents of the University of California (the “UCLA License Agreement”).
  evidence_url: https://www.sec.gov/Archives/edgar/data/1680048/000110465923079819/0001104659-23-079819-index.htm

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