---
schema_version: "secwatch.filing_event.v1"
accession: "0001213900-25-090674"
form_type: "8-K"
ticker: "MBAV"
cik: "0002016072"
company_name: "M3-Brigade Acquisition V Corp."
filed_at: "2025-09-23T23:59:59+00:00"
generated_at: "2026-05-17T05:54:34.994426+00:00"
event_type: "m_and_a"
sentiment: "neutral"
materiality_score: 0.4
calibrated_materiality_score: 0.4
confidence: "high"
source: SEC EDGAR
---

# ReserveOne/M3-Brigade SPAC files draft S-4 for business combination; target listing under RONE

## Summary
- Pubco confidentially submitted draft Form S-4 to SEC on September 23, 2025.
- De-SPAC transaction with M3-Brigade Acquisition V Corp. announced July 8, 2025.
- Upon closing, Pubco expected to list on Nasdaq under ticker 'RONE'.
- Closing subject to SEC review, M3-Brigade shareholder approval, and customary conditions.

## SEC filing metadata
- accession: 0001213900-25-090674
- form_type: 8-K
- ticker: MBAV
- cik: 0002016072
- company_name: M3-Brigade Acquisition V Corp.
- filed_at: 2025-09-23T23:59:59+00:00
- event_type: m_and_a
- sentiment: neutral
- materiality_score: 0.4
- calibrated_materiality_score: 0.4
- confidence: high
- sec_items: 8.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/2016072/000121390025090674/0001213900-25-090674-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/2016072/000121390025090674/ea0258451-8k425_m3brigade5.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001213900-25-090674
- JSON: https://secwatch.observer/filing/0001213900-25-090674.json
- Plain text: https://secwatch.observer/filing/0001213900-25-090674.txt

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