---
schema_version: "secwatch.filing_event.v1"
accession: "0001104659-22-035014"
form_type: "8-K"
ticker: "MBIO"
cik: "0001680048"
company_name: "MUSTANG BIO, INC."
filed_at: "2022-03-17T23:59:59+00:00"
generated_at: "2026-06-26T22:02:33.700557+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.35
calibrated_materiality_score: 0.35
confidence: "high"
source: SEC EDGAR
---

# Mustang Bio SVP of Finance & Corporate Controller resigns, consulting arrangement made

## Summary
- Brian Achenbach resigns as SVP of Finance & Corporate Controller, effective March 27, 2022.
- Resignation is voluntary; no disagreement with Company on operations, financial reporting, or controls.
- Consulting arrangement with Achenbach begins March 28, 2022, to ensure transition.

## SEC filing metadata
- accession: 0001104659-22-035014
- form_type: 8-K
- ticker: MBIO
- cik: 0001680048
- company_name: MUSTANG BIO, INC.
- filed_at: 2022-03-17T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.35
- calibrated_materiality_score: 0.35
- confidence: high
- sec_items: 5.02
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1680048/000110465922035014/0001104659-22-035014-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1680048/000110465922035014/tm229637d1_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001104659-22-035014
- JSON: https://secwatch.observer/filing/0001104659-22-035014.json
- Plain text: https://secwatch.observer/filing/0001104659-22-035014.txt

## Key facts
- Executive change
  Brian Achenbach resigned as Senior Vice President of Finance & Corporate Controller at MUSTANG BIO, INC..
  - Action: resigned
  - Role: Senior Vice President of Finance & Corporate Controller
  source text: On March 11, 2022, Mr. Brian Achenbach notified Mustang Bio, Inc. (the “Company”) that he was resigning from his role as the Company’s Senior Vice President of Finance & Corporate Controller, effective March 27, 2022, to pursue an opportunity outside of the Company.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1680048/000110465922035014/0001104659-22-035014-index.htm

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