---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-25-009627"
form_type: "8-K"
ticker: "APTOF"
cik: "0000882361"
company_name: "Aptose Biosciences Inc."
filed_at: "2025-01-21T23:59:59+00:00"
generated_at: "2026-05-27T22:47:19.285498+00:00"
event_type: "regulatory"
sentiment: "negative"
materiality_score: 0.85
calibrated_materiality_score: 0.85
confidence: "high"
source: SEC EDGAR
---

# Aptose gets Nasdaq delisting notice for low bid price; reverse split vote Jan 27

## Summary
- Received Staff letter Jan 14, 2025 for failing $1 minimum bid price for 30 consecutive days.
- Must regain compliance by March 31, 2025 or present plan to hearings panel.
- Special shareholders' meeting Jan 27, 2025 to approve reverse stock split.
- Common shares continue to trade on TSX; unaffected by Nasdaq status.
- No assurance of regaining compliance with Nasdaq listing rules.

## SEC filing metadata
- accession: 0001193125-25-009627
- form_type: 8-K
- ticker: APTOF
- cik: 0000882361
- company_name: Aptose Biosciences Inc.
- filed_at: 2025-01-21T23:59:59+00:00
- event_type: regulatory
- sentiment: negative
- materiality_score: 0.85
- calibrated_materiality_score: 0.85
- confidence: high
- sec_items: 3.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/882361/000119312525009627/0001193125-25-009627-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/882361/000119312525009627/d877128d8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-25-009627
- JSON: https://secwatch.observer/filing/0001193125-25-009627.json
- Plain text: https://secwatch.observer/filing/0001193125-25-009627.txt

## Source-grounded claims
- claim_id: b84f621bd6c3f225ff83ec19918da8637df19510
  claim: Aptose Biosciences Inc. received a nasdaq deficiency notice notice regarding minimum bid price (rules 5550(a)(2)).
  evidence_excerpt: January 14, 2025, Aptose Biosciences Inc. (the “Company”) received an additional staff determination letter (the “Letter”) from the Nasdaq Listing Qualifications Department (the “Staff”) of The Nasdaq Stock Market LLC (“
  evidence_url: https://www.sec.gov/Archives/edgar/data/882361/000119312525009627/0001193125-25-009627-index.htm

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