{"url_path":"/sec/aptof/8-k/2026-07-01/cover-page","section_key":"cover-page","section_title":"Cover Page","topic":"sec","document":{"doc_type":"8-K","doc_date":"2026-07-01","source_url":"https://www.sec.gov/Archives/edgar/data/882361/0001193125-26-291114-index.html","accession_number":"0001193125-26-291114","cik":"0000882361","ticker":"APTOF","issuer_name":"Aptose Biosciences Inc.","edgar_url":"https://www.sec.gov/Archives/edgar/data/882361/0001193125-26-291114-index.html","primary_entity_key":"0000882361","primary_entity_name":"Aptose Biosciences Inc."},"word_count":306,"has_tables":true,"body_markdown":"8-K\n\nfalse 0000882361 0000882361 2026-06-30 2026-06-30\n\n \n\n \n\nUNITED STATES\n\nSECURITIES AND EXCHANGE COMMISSION\n\nWashington, D.C. 20549\n\n \n\n \n\nFORM 8-K\n\n \n\n \n\nCURRENT REPORT\n\nPursuant to Section 13 or 15(d)\n\nof the Securities Exchange Act of 1934\n\nDate of Report (Date of earliest event reported): June 30, 2026\n\n \n\n \n\nAPTOSE BIOSCIENCES INC.\n\n(Exact name of registrant as specified in its charter)\n\n \n\n \n\n \n\nCanada\n \n001-32001\n \n98-1136802\n\n(State or Other Jurisdiction\nof Incorporation)\n \n\n(Commission\n\nFile Number)\n\n \n(I.R.S. Employer\nIdentification No.)\n\n66 Wellington Street West, Suite 5300\n\nTD Bank Tower, Box 48\n\nToronto, Ontario M5K 1E6\n\nCanada\n\n(Address of Principal Executive Offices) (Zip Code)\n\n(647) 479-9828\n\n(Registrant’s telephone number, including area code)\n\n \n\n(Former name or former address, if changed since last report)\n\n \n\n \n\nCheck the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:\n\n \n\n☐\n\nWritten communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)\n\n \n\n☐\n\nSoliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)\n\n \n\n☐\n\nPre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))\n\n \n\n☐\n\nPre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))\n\nSecurities registered pursuant to Section 12(b) of the Act:\n\n \n\nTitle of each class\n\n \n\nTrading\nSymbol(s)\n\n \n\nName of each exchange\non which registered\n\nNone\n \nN/A\n \nN/A\n\nIndicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).\n\nEmerging growth company ☐\n\nIf an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐"}