Table of Contents As filed with the Securities and Exchange Commission on August 1, 2024 Registration No. 333- UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM S-1 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 APTOSE BIOSCIENCES INC. (Exact Name of Registrant As Specified In Its Charter) (State or other jurisdiction of incorporation or organization) (Primary Standard Industrial Canada 2836 98-1136802 Classification Code Number) (I.R.S. Employer Identification Number) 66 ...

Table of Contents As filed with the Securities and Exchange Commission on January 19, 2024 Registration No. 333-275870 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 AMENDMENT NO. 3 To FORM S-1 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 APTOSE BIOSCIENCES INC. (Exact Name of Registrant As Specified In Its Charter) (State or other jurisdiction of incorporation or organization) Canada 2836 98-1136802 (Primary Standard Industrial Classification Code Number) (I.R.S. Employe ...

Table of Contents As filed with the Securities and Exchange Commission on December 11, 2023 Registration No. 333-275870 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 AMENDMENT NO.1 To FORM S-1 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 APTOSE BIOSCIENCES INC. (Exact Name of Registrant As Specified In Its Charter) (State or other jurisdiction of incorporation or organization) Canada 2836 98-1136802 (Primary Standard Industrial Classification Code Number) (I.R.S. Employe ...

Table of Contents As filed with the Securities and Exchange Commission on December 1, 2023 Registration No. 333-________ UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM S-1 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 APTOSE BIOSCIENCES INC. (Exact Name of Registrant As Specified In Its Charter) (State or other jurisdiction of incorporation or organization) Canada 2836 98-1136802 (Primary Standard Industrial Classification Code Number) (I.R.S. Employer Identification ...

As filed with the Securities and Exchange Commission on June 16, 2023 Registration No. 333-________ UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Aptose Biosciences U.S. Inc. Unit 120, 12770 High Bluff Drive San Diego, California 92130 (858) 926-2730 (Name, address, including zip code, and telephone number, including area code, of agent for service) FORM S-1 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 APTOSE BIOSCIENCES INC. (Exact Name of Registrant As Specified In Its ...