Exhibit 99.1 News Release Puma Biotechnology Reports First Quarter Financial Results LOS ANGELES, Calif., May 2, 2024 - Puma Biotechnology, Inc. (NASDAQ: PBYI), a biopharmaceutical company, announced financial results for the first quarter ended March 31, 2024. Unless otherwise stated, all comparisons are for the first quarter 2024 compared to the first quarter 2023. Product revenue, net consists entirely of revenue from sales of NERLYNX®, Puma’s first commercial product. Product revenue, net in the first q ...