Aptose Upgraded to Trade on OTCQB Market

SAN DIEGO and TORONTO, July 01, 2025 (GLOBE NEWSWIRE) -- Aptose Biosciences Inc. (“Aptose” or the “Company”) (TSX: APS; OTC: APTOF), a clinical-stage precision oncology company developing a tuspetinib (TUS) based triple drug frontline therapy to treat patients with newly diagnosed acute myeloid leukemia (AML), announced today that the Company has been upgraded to list for trading on the OTCQB Market under the ticker “APTOF,” in addition to the Company’s continued listing on the Toronto Stock Exchange (TSX) under the symbol “APS”. Trading on OTCQB begins today, July 1, 2025.