Puma Biotechnology Investor Presentation — August 2021

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This presentation contains forward -looking statements, including statements regarding commercialization of NERLYNX® and the pote ntial indications

and development of our drug candidates. All forward -looking statements involve risks and uncertainties that could cause our actu al results to differ

materially from the anticipated results and expectations expressed in these forward -looking statements. These statements are bas ed on our 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 our business or the global economy and financial markets, genera lly, from the global

COVID -19 pandemic, and the risk factors disclosed in our periodic and current reports filed with the Securities and Exchange Com mission from time to

time, including our Annual Report on Form 10 -K for the year ended December 31, 2020 and subsequent reports. Readers are cautione d not to place

undue reliance on these forward -looking statements, which speak only as of the date hereof. We assume no obligation to update th ese forward -looking

statements except as required by law.Forward -Looking Safe -Harbor Statement3

Copyright 2021 Puma BiotechnologyPUMA’s Pharmacy and Distributor Network

Others (VA, DOD)Hub Services

Specialty Pharmacy Network (SP)

Specialty Distributor Network (SD)

DMS Pharmaceutical Group

Copyright 2021 Puma Biotechnology~$49 Million Net NERLYNX Revenue in Q2’21

45.848.9Quarterly Net Revenue (in $MM)5

Copyright 2021 Puma Biotechnology3,354 Ex -factory Bottles were Sold in Q2’21

3,2473,354Bottles Sold (SP + SD) by Quarter