Aptose Announces Pricing of $8.4 Million Public Offering and a Concurrent $4 Million Private Placement with Hanmi Pharmaceutical - Seite 2

The securities to be sold in the Public Offering are being offered by Aptose pursuant to a registration statement on Form S-1 (File. No. 333-275870), including a base prospectus, that was previously filed by Aptose with the Securities and Exchange Commission (“SEC”) and was declared effective on January 25, 2024. The Public Offering is being made only by means of a written prospectus and prospectus supplement that form a part of the registration statement. Before you invest, you should read the prospectus supplement and the accompanying prospectus and other documents the Company has filed with the SEC for more complete information about the Company and the Public Offering. You may get these documents for free by visiting EDGAR on the SEC website at www.sec.gov. Alternatively, copies of the final prospectus supplement may be obtained, once available, by contacting Newbridge Securities Corporation, Attn: Equity Syndicate Department, 1200 North Federal Highway, Suite 400, Boca Raton, FL 33432, by email at [e-mail] or by telephone at [phone]. The securities to be sold to Hanmi have not been registered under the U.S. Securities Act of 1933, as amended, and will be issued in reliance on an exemption from the registration requirements thereof.

This press release does not constitute an offer to sell or the solicitation of offers to buy any securities of Aptose, and shall not constitute an offer, solicitation or sale of any security in any state or jurisdiction in which such offer, solicitation or sale would be unlawful prior to registration or qualification under the securities laws of any such state or jurisdiction.

About Aptose

Aptose Biosciences is a clinical-stage biotechnology company developing precision medicines 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’s lead clinical-stage product, tuspetinib, is a once daily oral therapy being studied as monotherapy and in combination therapy in the APTIVATE international Phase 1/2 expansion trial in patients with relapsed or refractory acute myeloid leukemia (AML). For more information, please visit www.aptose.com.