---
schema_version: "secwatch.filing_event.v1"
accession: "0001104659-25-115182"
form_type: "8-K"
ticker: "PMN"
cik: "0001374339"
company_name: "ProMIS Neurosciences Inc."
filed_at: "2025-11-24T23:59:59+00:00"
generated_at: "2026-05-16T17:17:04.978384+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.8
calibrated_materiality_score: 0.8
confidence: "high"
source: SEC EDGAR
---

# ProMIS Neurosciences Announces 1-for-25 Reverse Stock Split Effective November 28, 2025

## Summary
- Reverse stock split at ratio 1:25 approved by board on Nov 17, 2025, effective Nov 28, 2025.
- Outstanding shares will reduce from approximately 53.8 million to approximately 2.15 million.
- Nasdaq deficiency notice received Jan 8, 2025 for bid price below $1.00; reverse split aims to cure compliance.
- Proportional adjustments to equity incentive plans, stock options, and warrants.
- No fractional shares issued; stockholders receive cash in lieu of fractional shares.

## SEC filing metadata
- accession: 0001104659-25-115182
- form_type: 8-K
- ticker: PMN
- cik: 0001374339
- company_name: ProMIS Neurosciences Inc.
- filed_at: 2025-11-24T23:59:59+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.8
- calibrated_materiality_score: 0.8
- confidence: high
- sec_items: 5.03, 8.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1374339/000110465925115182/0001104659-25-115182-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1374339/000110465925115182/pmn-20251124x8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001104659-25-115182
- JSON: https://secwatch.observer/filing/0001104659-25-115182.json
- Plain text: https://secwatch.observer/filing/0001104659-25-115182.txt

## Key facts
- Governance Changes
  ProMIS Neurosciences Inc.: Reverse stock split at a 1-for-25 ratio effected via articles of amendment (effective 2025-11-28).
  - Change: charter amendment
  - Effective: 2025-11-28
  source text: Effective as of 12:01 a.m. Eastern Time on November 28, 2025, the Company filed the Articles Amendment to effect one-for-twenty-five reverse stock split
  evidence_url: https://www.sec.gov/Archives/edgar/data/1374339/000110465925115182/0001104659-25-115182-index.htm

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