GlobeNewswire Inc | Sep 15, 2020 07:30AM EDT

September 15, 2020

SAN DIEGO and TORONTO, Sept. 15, 2020 (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 William G. Rice, Ph.D., Chairman, President and Chief Executive Officer, and the Aptose management team will participate at the Oppenheimer Fall Healthcare Life Sciences and MedTech Summit:

-- Oppenheimer Fall Healthcare Life Sciences & Medtech Summit

Date: Tuesday, September 22, 2020 Time: 1:40 PM EDT Format: Fireside Chat (with Matthew Biegler, Senior Analyst, Oppenheimer & Co.) Webcast: Link

The audio webcast can also 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: CG-806, an oral, first-in-class mutation-agnostic FLT3/BTK kinase inhibitor, is in a Phase 1 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 has received an IND allowance to conduct a separate Phase 1 trial in patients with relapsed or refractory acute myeloid leukemia (AML); APTO-253, the only clinical stage agent that directly targets the MYC oncogene and suppresses its expression, is in a Phase 1b clinical trial for the treatment of patients with relapsed or refractory acute myeloid leukemia (AML) or high risk myelodysplastic syndrome (MDS). For further information, please visit www.aptose.com

For further information, please contact:

Aptose Biosciences Inc. LifeSci Advisors, LLCGreg Chow Dan Ferry, Managing DirectorExecutive Vice President, CFO 617-535-7746650-718-5028 Daniel@LifeSciAdvisors.comgchow@aptose.com SMP Communications Susan Pietropaolo 201-923-2049 susan@smpcommunications.com