{"schema_version":"secwatch.filing_event.v1","accession":"0001171843-25-004249","form_type":"8-K","ticker":"APTOF","cik":"0000882361","company_name":"Aptose Biosciences Inc.","filed_at":"2025-07-01T23:59:59+00:00","discovered_at":"2026-05-14T18:02:46.567604+00:00","generated_at":"2026-05-18T11:33:24.734906+00:00","sec_items":["7.01","9.01"],"event_type":"other_material","sentiment":"neutral","materiality_score":0.3,"calibrated_materiality_score":0.3,"confidence":"high","headline":"Aptose Biosciences upgraded to OTCQB market; begins trading under APTOF","bullets":["Company upgraded to OTCQB Market, effective July 1, 2025.","New ticker symbol APTOF on OTCQB.","Continues trading on Toronto Stock Exchange under symbol APS.","OTCQB requires current reporting and annual management certification."],"urls":{"canonical":"https://secwatch.observer/filing/0001171843-25-004249","json":"https://secwatch.observer/filing/0001171843-25-004249.json","markdown":"https://secwatch.observer/filing/0001171843-25-004249.md","text":"https://secwatch.observer/filing/0001171843-25-004249.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/882361/000117184325004249/0001171843-25-004249-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/882361/000117184325004249/f8k_070125.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-05-18T11:33:24.734906+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":[],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}