GlobeNewswire Inc | Aug 30, 2021 07:30AM EDT

August 30, 2021

SAN DIEGO and TORONTO, Aug. 30, 2021 (GLOBE NEWSWIRE) -- Aptose Biosciences Inc. (Nasdaq: APTO; TSX: APS), a clinical-stage company developing highly differentiated therapeutics that target the underlying mechanisms of cancer, today announced that the Aptose management team will participate at the upcoming conferences in September 2021:

? H.C. Wainwright 23rd Annual Global Investment Conference Date: Monday, September 13, 2021Time: On demand starting 7:00 AM EDTFormat: VirtualWebcast: Link ? Cantor Global Healthcare Conference Date: Tuesday, September 28, 2021Time: 11:20 AM EDTFormat: VirtualWebcast: Link

The webcasts also can be accessed through the Aptose website atwww.aptose.comand will be archived shortly after the live events.

About Aptose

Aptose Biosciences is a clinical-stage biotechnology company committed to developing personalized therapies addressing unmet medical needs in oncology, with an initial focus on hematology. The Company's small molecule cancer therapeutics pipeline includes products designed to provide single agent efficacy and to enhance the efficacy of other anti-cancer therapies and regimens without overlapping toxicities. The Company has two clinical-stage investigational products for hematologic malignancies: luxeptinib, an oral, first-in-class mutation-agnostic FLT3/BTK kinase inhibitor, is in a Phase 1a/b trial in patients with relapsed or refractory B cell malignancies, including chronic lymphocytic leukemia (CLL), small lymphocytic lymphoma (SLL) and non-Hodgkin lymphoma (NHL), who have failed or are intolerant to standard therapies, and is in a separate Phase 1a/b trial in patients with relapsed or refractory acute myeloid leukemia (AML); APTO-253, the only known clinical stage agent that directly targets the MYC oncogene and suppresses its expression, is in a Phase 1a/b clinical trial for the treatment of patients with relapsed or refractory AML or high risk myelodysplastic syndrome (MDS).

For further information, please contact:

Aptose Biosciences Inc. LifeSci Advisors, LLCSusan Pietropaolo Dan Ferry, Managing Director201-923-2049 617-535-7746spietropaolo@aptose.com Daniel@LifeSciAdvisors.com