{"schema_version":"secwatch.filing_event.v1","accession":"0001193125-25-032092","form_type":"8-K","ticker":"APTOF","cik":"0000882361","company_name":"Aptose Biosciences Inc.","filed_at":"2025-02-21T23:59:59+00:00","discovered_at":"2026-05-14T18:03:06.651774+00:00","generated_at":"2026-05-26T07:47:10.439103+00:00","sec_items":["3.03","5.03","9.01"],"event_type":"other_material","sentiment":"neutral","materiality_score":0.5,"calibrated_materiality_score":0.5,"confidence":"high","headline":"Aptose Biosciences announces 1-for-30 reverse stock split effective Feb 26, 2025","bullets":["Reverse stock split ratio set at 1-for-30; trading on split-adjusted basis begins Feb 26.","Post-split shares outstanding approx. 2.1M; no fractional shares issued; rounded down to whole share.","CUSIP changes to 03835T408 and ISIN to CA03835T4081 effective Feb 26.","Proportionate adjustments to outstanding equity awards, exercise prices, and equity incentive plans.","Shares continue trading on Nasdaq (APTO) and TSX (APS)."],"urls":{"canonical":"https://secwatch.observer/filing/0001193125-25-032092","json":"https://secwatch.observer/filing/0001193125-25-032092.json","markdown":"https://secwatch.observer/filing/0001193125-25-032092.md","text":"https://secwatch.observer/filing/0001193125-25-032092.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/882361/000119312525032092/0001193125-25-032092-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/882361/000119312525032092/d934231d8k.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-05-26T07:47:10.439103+00:00"},"review":{"review_status":"machine_generated","human_reviewed":false,"corrected":false,"correction_note":null,"correction_timestamp":null,"superseded_by":null,"related_filings":[]},"source_grounded_claims":[{"claim_id":"4c3ade78fc268126857235dc2d53cdfa1b71a658","claim":"Aptose Biosciences Inc.: Filed articles of amendment under the Canada Business Corporations Act to effect a 1-for-30 reverse stock split of common shares, effective for trading starting February 26, 2025 (effective 2025-02-18).","evidence_excerpt":"The Company’s Board of Directors determined a final ratio of 1-for-30 for the reverse stock split (the “Reverse Stock Split”) and the Company filed articles of amendment under the Canada Business Corporations Act to implement the Reverse Stock Split on February 18, 2025 and announced that the Common Shares will begin trading on a split-adjusted basis on the Nasdaq Capital Market (“Nasdaq”) and the Toronto Stock Exchange (“TSX”) commencing upon market open on February 26, 2025 subject to final confirmation from TSX and Nasdaq.","evidence_source":"SEC 8-K Item 5.03/5.05/5.06","evidence_url":"https://www.sec.gov/Archives/edgar/data/882361/000119312525032092/0001193125-25-032092-index.htm","confidence":0.95,"family_label":"Governance Changes","details":[{"label":"Change","value":"charter amendment"},{"label":"Effective","value":"2025-02-18"}],"fact_type":"governance_change"}],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}