Aptose to Host Quarter and Seven Month Transition Period Ended December 31, 2014

Aptose Biosciences Inc. (Aptose) has announced that it intends to release financial results for the quarter and seven month transition period ended December 31, 2014, on Tuesday, March 3, 2015 after the close of the market. The company intends to host a conference call on the same day at 5:00 p.m. ET to discuss the financial results.

Participants can access the conference call by dialing 1-888-231-8191 (North American tollfree number) or 1-647-427-7450 (local). The conference call will be available via a live webcast at http://www.newswire.ca/en/webcast/detail/1492275/1661947, and will also available through a link on the Investor Relations section of Aptose's website at http://www.aptose.com/events/.

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 An archived version of the webcast will be available on the company's website for 30 days.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 30 days by dialing 1-855-859-2056, using the passcode 94751979.

The press release, the financial statements and the management's discussion and analysis for the quarter ended and seven month transition period ended December 31, 2014 will be available on SEDAR at www.sedar.com and EDGAR at www.sec.gov/edgar.shtml.