{"schema_version":"secwatch.filing_event.v1","accession":"0001171843-23-003757","form_type":"8-K","ticker":"APTOF","cik":"0000882361","company_name":"Aptose Biosciences Inc.","filed_at":"2023-06-05T23:59:59+00:00","discovered_at":"2026-05-14T18:03:42.583463+00:00","generated_at":"2026-06-14T07:44:56.927159+00:00","sec_items":["3.03","5.03","8.01","9.01"],"event_type":"other","sentiment":"neutral","materiality_score":0.5,"calibrated_materiality_score":0.5,"confidence":"high","headline":"Aptose Biosciences effects 1-for-15 reverse stock split, trading starts June 6","bullets":["Shareholders approved ratio range 1-for-10 to 1-for-20 at May 23, 2023 meeting; board set final ratio at 1-for-15.","Articles of amendment filed under CBCA on May 24, 2023; split-adjusted trading begins on Nasdaq and TSX on June 6, 2023.","Post-split shares outstanding approximately 6.3 million; no fractional shares issued, rounded down.","Common shares continue trading under symbols APTO (Nasdaq) and APS (TSX); new CUSIP 03835T309 and ISIN CA03835T3091.","Proportionate adjustments made to exercise prices and shares underlying outstanding equity awards and plans."],"urls":{"canonical":"https://secwatch.observer/filing/0001171843-23-003757","json":"https://secwatch.observer/filing/0001171843-23-003757.json","markdown":"https://secwatch.observer/filing/0001171843-23-003757.md","text":"https://secwatch.observer/filing/0001171843-23-003757.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/882361/000117184323003757/0001171843-23-003757-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/882361/000117184323003757/f8k_060223.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-06-14T07:44:56.927159+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":"80834e046f67b7cc862cbd3d9e843169896d79a6","claim":"Aptose Biosciences Inc.: Filed articles of amendment to implement a 1-for-15 reverse stock split (effective 2023-06-06).","evidence_excerpt":"The following day, the Company filed articles of amendment under the Canadian Business Corporations Act to implement the Reverse Stock Split.","evidence_source":"SEC 8-K Item 5.03/5.05/5.06","evidence_url":"https://www.sec.gov/Archives/edgar/data/882361/000117184323003757/0001171843-23-003757-index.htm","confidence":0.9,"family_label":"Governance Changes","details":[{"label":"Change","value":"charter amendment"},{"label":"Effective","value":"2023-06-06"}],"fact_type":"governance_change"}],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}