---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-25-061426"
form_type: "8-K"
ticker: "APTOF"
cik: "0000882361"
company_name: "Aptose Biosciences Inc."
filed_at: "2025-03-24T23:59:59+00:00"
generated_at: "2026-05-24T07:44:35.357395+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.6
calibrated_materiality_score: 0.6
confidence: "high"
source: SEC EDGAR
---

# Aptose converts $1.5M debt into 409,063 shares at $3.70; amends investor rights with Hanmi

## Summary
- Converted $1,513,533.10 of debt owed to Hanmi into 409,063 common shares at $3.70 per share.
- Interest for Dec. 21, 2024–Mar. 31, 2025 deferred; must be paid by June 27, 2025 to avoid default.
- Amended investor rights: Hanmi gets demand and piggyback registration rights; can nominate employees if ownership ≥10%.
- Company plans $15M capital raise; additional debt conversions allowed post-raise at Hanmi's discretion subject to 19.99% cap.

## SEC filing metadata
- accession: 0001193125-25-061426
- form_type: 8-K
- ticker: APTOF
- cik: 0000882361
- company_name: Aptose Biosciences Inc.
- filed_at: 2025-03-24T23:59:59+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.6
- calibrated_materiality_score: 0.6
- confidence: high
- sec_items: 1.01, 3.02, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/882361/000119312525061426/0001193125-25-061426-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/882361/000119312525061426/d943621d8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-25-061426
- JSON: https://secwatch.observer/filing/0001193125-25-061426.json
- Plain text: https://secwatch.observer/filing/0001193125-25-061426.txt

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