Puma Biotechnology, Inc. (PBYI)
Who owns Puma Biotechnology, Inc. (PBYI)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 76.6% of the shares are freely tradable; institutional investors hold 75.0%.
Ownership Structure
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| Vanguard Group Inc | 7.46 | 3,797,748 | +2.9 | 12/31/2025 |
| BlackRock Inc | 7.07 | 3,598,952 | -1.2 | 03/31/2026 |
| Acadian Asset Management LLC | 4.01 | 2,041,759 | +711.3 | 03/31/2026 |
| Renaissance Technologies Corp | 3.82 | 1,942,413 | -8.5 | 03/31/2026 |
| American Century Companies Inc | 3.77 | 1,916,346 | +16.1 | 03/31/2026 |
| Vanguard Capital Management, LLC | 3.57 | 1,817,681 | +0.0 | 03/31/2026 |
| Vanguard Portfolio Management, LLC | 3.41 | 1,734,649 | +0.0 | 03/31/2026 |
| Millennium Management LLC | 2.90 | 1,477,519 | +8,793.2 | 03/31/2026 |
| Dimensional Fund Advisors, Inc. | 2.82 | 1,436,106 | +7.2 | 03/31/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| Avantis US Small Cap Value ETF | 3.78 | 1,924,360 | +0.1 | 05/30/2026 |
Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.
Insider Transactions
| Date | Person | Role | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| 6. Jul 2026 | Auerbach Alan H | President and CEO | Sell | 44,058 | 8.26 | 364,051 |
| 6. Jul 2026 | Hunt Douglas M | See Remarks | Sell | 8,460 | 8.26 | 69,905 |
| 6. Jul 2026 | Nougues Maximo F | Chief Financial Officer | Sell | 9,386 | 8.26 | 77,557 |
Reportable transactions by officers and major shareholders from SEC Form 4 filings. "Other" includes things like stock grants and option exercises without a buy/sell character.
View all insider transactions →Data as of: July 31, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)
Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.