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Below is a table of the PBYI shares outstanding history going back to 11/7/2011:
Also see: PBYI Market Cap History PBYI YTD Return |
PBYI Shares Outstanding History — Puma Biotechnology Share Count Over Time
As of 8/3/2026 Puma Biotechnology has 51.62 million PBYI shares outstanding. Investors often track the PBYI shares outstanding history to compare shareholder return trends against the change in share count over time.
This page shows PBYI share count trends over time, with 61 historical shares outstanding datapoints presented, dating back to 11/7/2011.
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PBYI Historical Shares Outstanding: +7.13% CAGR 
Mouse over chart for data details
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| PBYI Stock Price Chart |
| About Puma Biotechnology Inc |
| Puma Biotechnology, Inc. is a biopharmaceutical company. Co. is focused on the development and commercialization of products to enhance cancer care. Co.'s lead product is NERLYNX, an oral version of neratinib, for the treatment of HER2-positive breast cancer. Neratinib is a potent irreversible tyrosine kinase inhibitor (TKI) that blocks signal transduction through the epidermal growth factor receptors, HER1, HER2 and HER4 It also engaged in the development and commercialization of, alisertib. We show 61 historical shares outstanding datapoints in our coverage of PBYI's shares outstanding history. Understanding the changing numbers of PBYI shares outstanding — and comprehending the concept of differing number of shares outstanding in general comparing companies like PBYI versus peers — is critical for investors. Many "beginner" or "novice" investors will look at one stock trading at a price of $10 per share and another trading at a price of $20 per share and think the latter company is worth twice as much. Of course, that is a completely meaningless comparison without also knowing how many shares outstanding there are for each of the two companies. Furthermore, via issuance of new shares over time, or the repurchase of existing shares, the number of shares outstanding can fluctuate over the course of history. With this page we aim to empower investors researching PBYI by allowing them to research PBYI shares outstanding history as well as any other stock in our coverage universe. |
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| PBYI Share Performance |
| Shares Outstanding Peers |
| Puma Biotechnology (PBYI) is categorized under the Healthcare sector; to help you further research historical shares outstanding numbers, below are some other companies in the same sector:
PCRX Shares Outstanding History PCSA Shares Outstanding History PCVX Shares Outstanding History PDCO Shares Outstanding History PDEX Shares Outstanding History PDSB Shares Outstanding History PEN Shares Outstanding History PEPG Shares Outstanding History PETV Shares Outstanding History PETX Shares Outstanding History More Healthcare companies » |
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