Aptose Biosciences to Host Third Quarter Ended September 30, 2015 Financial Results Conference Call and Webcast

SAN DIEGO and TORONTO, Nov. 5, 2015 (GLOBE NEWSWIRE) -- Aptose Biosciences Inc. (Aptose) (NASDAQ:APTO) (TSX:APS), a clinical-stage company developing new therapeutics and molecular diagnostics that target the underlying mechanisms of cancer, today announced it intends to release financial results for the third quarter ended September 30, 2015 on Tuesday, November 10, 2015 after the close of the market. The company intends to host a conference call on the same day at 5:00 p.m. EST to discuss the financial results.

Participants can access the conference call by dialing (855) 546-9557 (North American toll free number) or (412) 455-6106 (International toll free number). The conference call will be at http://www.media-server.com/m/acs/d55d76494fa3e3c98ac30e6e82a8d920 and will also be available through a link on the Investor Relations section of Aptose's website at ir.aptose.com.  Please log onto the webcast at least 10 minutes prior to the start of the call to ensure time for any software downloads that may be required. An archived version of the webcast along with a transcript will be available on the company's website for 30 days.   An audio replay of the webcast will be available approximately two hours after the conclusion of the call for 7 days by dialing 1-855-859-2056, using the passcode 74053061.

The press release, the financial statements and the management's discussion and analysis for the third quarter ended September 30, 2015 will be available on SEDAR at www.sedar.com and EDGAR at www.sec.gov/edgar.shtml

About Aptose Biosciences

Aptose Biosciences is a clinical-stage biotechnology company committed to discovering and developing personalized therapies addressing unmet medical needs in oncology. Aptose is advancing new therapeutics focused on novel cellular targets on the leading edge of cancer research coupled with companion diagnostics to identify the optimal patient population for our products. The company's small molecule cancer therapeutics pipeline includes products designed to provide additive or synergistic efficacy with existing anti-cancer therapies and regimens without overlapping toxicities. For further information, please visit www.aptose.com.

Forward Looking Statements

This press release contains forward-looking statements within the meaning of Canadian and U.S. securities laws. Such statements include, but are not limited to, statements relating to the Company's plans, objectives, expectations and intentions and other statements including words such as "continue", "expect", "intend", "will", "should", "would", "may", and other similar expressions. Such statements reflect our current views with respect to future events and are subject to risks and uncertainties and are necessarily based upon a number of estimates and assumptions that, while considered reasonable by us are inherently subject to significant business, economic, competitive, political and social uncertainties and contingencies. Many factors could cause our actual results, performance or achievements to be materially different from any future results, performance or achievements described in this press release. Such expressed or implied forward looking statements could include, among others: our ability to obtain the capital required for research and operations; the inherent risks in early stage drug development including demonstrating efficacy; development time/cost and the regulatory approval process; the progress of our clinical trials; our ability to find and enter into agreements with potential partners; our ability to attract and retain key personnel; changing market conditions; and other risks detailed from time-to-time in our ongoing quarterly filings, annual information forms, annual reports and annual filings with Canadian securities regulators and the United States Securities and Exchange Commission.

Should one or more of these risks or uncertainties materialize, or should the assumptions set out in the section entitled "Risk Factors" in our filings with Canadian securities regulators and the United States Securities and Exchange Commission underlying those forward-looking statements prove incorrect, actual results may vary materially from those described herein. These forward-looking statements are made as of the date of this press release and we do not intend, and do not assume any obligation, to update these forward-looking statements, except as required by law. We cannot assure you that such statements will prove to be accurate as actual results and future events could differ materially from those anticipated in such statements. Investors are cautioned that forward-looking statements are not guarantees of future performance and accordingly investors are cautioned not to put undue reliance on forward-looking statements due to the inherent uncertainty therein.

CONTACT: For further information, please contact:

         Aptose Biosciences
         Greg Chow, CFO
         647-479-9828
         gchow@aptose.com

         BCC Partners
         Karen L. Bergman or Susan Pietropaolo
         650-575-1509 or 845-638-6290
         kbergman@bccpartners.com or spietropaolo@bccpartners.com

Released November 5, 2015