{"url_path":"/sec/aptof/10-q/2026/item-6","section_key":"item-6","section_title":"Item 6 EXHIBITS","topic":"sec","document":{"doc_type":"10-Q","doc_date":"2026-05-13","source_url":"https://www.sec.gov/Archives/edgar/data/882361/0001193125-26-221955-index.html","accession_number":"0001193125-26-221955","cik":"0000882361","ticker":"APTOF","issuer_name":"Aptose Biosciences Inc.","edgar_url":"https://www.sec.gov/Archives/edgar/data/882361/0001193125-26-221955-index.html","primary_entity_key":"0000882361","primary_entity_name":"Aptose Biosciences Inc."},"word_count":332,"has_tables":true,"body_markdown":"ITEM 6 – EXHIBITS\n\n \n\nExhibit Number\n\nDescription of Document\n\n31.1*\n\n[Certification of Principal Executive Officer Pursuant to Rules 13a-14(a) and 15d-14(a) under the Securities Exchange Act of 1934, as Adopted Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.](none-ex31_1.htm)\n\n31.2*\n\n[Certification of Principal Financial Officer Pursuant to Rules 13a-14(a) and 15d-14(a) under the Securities Exchange Act of 1934, as Adopted Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.](none-ex31_2.htm)\n\n32.1*\n\n[Certification of Principal Executive Officer Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.](none-ex32_1.htm)\n\n32.2*\n\n[Certification of Principal Financial Officer Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.](none-ex32_2.htm)\n\n101**\n\nThe following condensed consolidated interim financial statements from the Aptose Biosciences Inc. Quarterly Report on Form 10-Q for the quarter ended March 31, 2026, formatted in Inline Extensible Business Reporting Language (Inline XBRL): (i) statements of operations and comprehensive loss, (ii) balance sheets, (iii) statements of changes of shareholders’ equity, (iv) statements of cash flows, and (v) the notes to the financial statements.\n\n101.SCH\n\nXBRL Taxonomy Extension Schema With Embedded Linkbases Document\n\n104*\n\nCover Page Interactive Data File (formatted as Inline XBRL and contained in Exhibit 101)\n\n*\n\nFiled herewith.\n\n**\n\nIn accordance with Rule 406T of Regulation S-T, the XBRL related information in Exhibit 101 to this Quarterly Report on Form 10-Q is deemed not filed or part of a registration statement or prospectus for purposes of Sections 11 or 12 of the Securities Act, is deemed not filed for purposes of Section 18 of the Exchange Act, and otherwise is not subject to liability under these sections.\n\n \n\n \n\n \n\n37\n\n \n\n \n\n \n\nSIGNATURES\n\nPursuant to the requirements of the Securities Act, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized, on the 13th day of May, 2026.\n\n \n\nAPTOSE BIOSCIENCES INC.\n\nBy:\n\n/s/ William G. Rice, Ph.D.\n\nWilliam G. Rice, Ph.D.\n\nPresident and Chief Executive Officer\n\n \n\n38"}