---
schema_version: "secwatch.filing_event.v1"
accession: "0001558370-22-018593"
form_type: "8-K"
ticker: "MBIO"
cik: "0001680048"
company_name: "MUSTANG BIO, INC."
filed_at: "2022-12-13T23:59:59+00:00"
generated_at: "2026-06-21T05:28:45.294295+00:00"
event_type: "debt"
sentiment: "neutral"
materiality_score: 0.3
calibrated_materiality_score: 0.3
confidence: "high"
source: SEC EDGAR
---

# Mustang Bio amends $75M loan agreement to replace LIBOR with SOFR-based rates

## Summary
- First Amendment to $75M Loan Agreement with Runway Growth Finance Corp., dated Dec 7, 2022.
- Replaces LIBOR with Adjusted Term SOFR Rate (Term SOFR + 0.26%, floor 0.50%).
- Applicable Margin of 8.75% when using Adjusted Term SOFR Rate; total rate floor of 9.25%.
- Amendment includes fallback provisions if SOFR unavailable (Prime Rate alternative).
- No change to principal amount or maturity; loan terms otherwise unchanged.

## SEC filing metadata
- accession: 0001558370-22-018593
- form_type: 8-K
- ticker: MBIO
- cik: 0001680048
- company_name: MUSTANG BIO, INC.
- filed_at: 2022-12-13T23:59:59+00:00
- event_type: debt
- sentiment: neutral
- materiality_score: 0.3
- calibrated_materiality_score: 0.3
- confidence: high
- sec_items: 1.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1680048/000155837022018593/0001558370-22-018593-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1680048/000155837022018593/tmb-20221207x8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001558370-22-018593
- JSON: https://secwatch.observer/filing/0001558370-22-018593.json
- Plain text: https://secwatch.observer/filing/0001558370-22-018593.txt

## Key facts
- Material Agreements
  MUSTANG BIO, INC. amended First Amendment with Runway Growth Finance Corp. (effective 2022-12-07).
  - Action: amendment
  - Agreement: credit facility
  - Counterparty: Runway Growth Finance Corp.
  - Effective: 2022-12-07
  source text: On December 7, 2022, the Company entered into the First Amendment (the “First Amendment”) to the Loan Agreement by and between the Company and Runway.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1680048/000155837022018593/0001558370-22-018593-index.htm

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