Exhibit 32.2
Certification Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
Pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, I, Fletcher Payne, the Senior Vice President and Chief Financial Officer of Aptose Biosciences Inc. (the “Company”), hereby certify that, to my knowledge:
1.
The Annual Report on Form 10-K for the year ended December 31, 2025 (the “Report”) of the Company fully complies with the requirements of Section 13(a) or Section 15(d) of the Securities Exchange Act of 1934; and
2.
The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.
Date: March 31, 2026
/s/ Fletcher Payne |
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Name: |
Fletcher Payne |
Title: |
Senior Vice President and Chief Financial Officer |