X0206 3 2025-03-18 0 0000882361 Aptose Biosciences Inc. APTO 0001904921 Hanmi Pharmaceutical Co., Ltd. 14 WIRYESEONG-DAERO, SONGPA-GU SEOUL M5 05545 KOREA, REPUBLIC OF true Common Shares 508710 D Warrants to Purchase Common Shares 51.3 2024-01-31 2029-01-31 Common Shares 77972 D The Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of its pecuniary interest therein. Represents the exercise price per Common Share of the Issuer issuable upon the exercise of the Warrants, as adjusted following the Issuer's 30-to-1 reverse stock split. HANMI PHARMACEUTICAL CO., LTD.; By: /s/ Haegon Shin, Managing Director, Global Business Division 2025-03-20