---
schema_version: "secwatch.filing_event.v1"
accession: "0001213900-25-083405"
form_type: "8-K"
ticker: "MBVI"
cik: "0002073928"
company_name: "M3-Brigade Acquisition VI Corp."
filed_at: "2025-09-02T23:59:59+00:00"
generated_at: "2026-05-17T09:01:51.302491+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.75
calibrated_materiality_score: 0.75
confidence: "high"
source: SEC EDGAR
---

# M3-Brigade Acquisition VI closes $345M IPO; trust funded for business combination

## Summary
- IPO closed Aug 28, 2025: 34,500,000 units at $10.00 per unit, gross proceeds $345M (full over-allotment exercised).
- $345M placed in trust account; funds released only upon business combination, redemption, or amendment.
- Private placement of 5,333,333 warrants at $1.50 each raised $8M from sponsor and Cantor.
- Benjamin Fader-Rattner appointed independent director, chairs Audit and Compensation Committees.
- Company must complete initial business combination within 24 months (by Aug 28, 2027) or redeem public shares.

## SEC filing metadata
- accession: 0001213900-25-083405
- form_type: 8-K
- ticker: MBVI
- cik: 0002073928
- company_name: M3-Brigade Acquisition VI Corp.
- filed_at: 2025-09-02T23:59:59+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.75
- calibrated_materiality_score: 0.75
- confidence: high
- sec_items: 1.01, 3.02, 5.02, 5.03, 8.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/2073928/000121390025083405/0001213900-25-083405-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/2073928/000121390025083405/ea0255430-8k_m3brig6.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001213900-25-083405
- JSON: https://secwatch.observer/filing/0001213900-25-083405.json
- Plain text: https://secwatch.observer/filing/0001213900-25-083405.txt

## Key facts
- Governance Changes
  M3-Brigade Acquisition VI Corp.: Amended and restated memorandum and articles of association filed effective August 26, 2025 in connection with IPO (effective 2025-08-26).
  - Change: charter amendment
  - Effective: 2025-08-26
  source text: On August 26, 2025, in connection with the IPO, the Company filed its amended and restated memorandum and articles of association (the “ Amended and Restated Memorandum and Articles of Association ”) with the Cayman Islands Registrar of Companies, which was effective on August 26, 2025.
  evidence_url: https://www.sec.gov/Archives/edgar/data/2073928/000121390025083405/0001213900-25-083405-index.htm

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