PUMA BIOTECHNOLOGY, INC.

Forward-Looking Statements

This press release contains forward-looking statements, including statements regarding Puma’s anticipated milestones and estimates of future financial results for thethird quarter and full year 2026. All forward-looking statements involve risks and uncertainties that could cause Puma’s actual results to differ materially from the anticipated results and expectations expressed in these forward-looking statements. These statements are based on current expectations, forecasts and assumptions, and actual outcomes and results could differ materially from these statements due to a number of factors, which include, but are not limited to, any adverse impact on Puma’s business or the global economy and financial markets, any changes in Puma’s product candidates’ regulatory approvals, results from Puma’s clinical trials, any litigation involving Puma, any changes to Puma’s in-licensed intellectual property and the risk factors disclosed in the periodic and current reports filed by Puma with the Securities and Exchange Commission from time to time, including Puma’s Annual Report on Form 10-K for the year ended December 31,2025 and subsequent filings. Readers are cautioned not to place undue reliance on these forward-looking statements, which speak only as of the date hereof. Puma assumes no obligation to update these forward-looking statements, except as required by law.