Puma Biotechnology PBYI Institutional Ownership

Puma Biotechnology, Inc. (NASDAQ:PBYI) showed up in the 13F filings of 162 institutional investors as of June 2026.

• Collectively, these holders controlled 76.1% of Puma Biotechnology's outstanding shares in June 2026, up from 74.5% in March 2026.
• Their total shares held in PBYI increased 3.03% from the prior quarter, while the number of investors in Puma Biotechnology increased 35.0% year over year.
• During the quarter, 83 of these 162 funds increased positions in PBYI, 52 reduced exposure, and 27 held steady.
• Altogether, these fund groups held 38.78Mn shares in PBYI by June 2026, up by 1.14Mn shares quarter on quarter, and up 6.45Mn shares year over year.
• ACORN CAPITAL ADVISORS, LLC leads ownership in PBYI with 4.13Mn shares as of June 30, 2026, equal to 8.11% of outstanding shares.
• Leading buyers of Puma Biotechnology shares for the quarter ending June 2026 were LSV ASSET MANAGEMENT (435.11K), AMERICAN CENTURY COMPANIES INC (403.65K), GEODE CAPITAL MANAGEMENT, LLC (322.06K), Invesco Ltd. (205.96K), BlackRock, Inc. (205.78K).
• The biggest sellers of Puma Biotechnology for the quarter ending June 2026 included MILLENNIUM MANAGEMENT LLC (875.28K), Connor, Clark & Lunn Investment Management Ltd. (139.85K), RENAISSANCE TECHNOLOGIES LLC (106.2K), Morgan Stanley (94.07K), Sei Investments Co (89.51K).
• Business Quant data shows the 10 biggest positions in Puma Biotechnology as of June 2026 are held by ACORN CAPITAL ADVISORS, LLC (4.13Mn), BlackRock, Inc. (3.8Mn), AMERICAN CENTURY COMPANIES INC (2.32Mn), ACADIAN ASSET MANAGEMENT LLC (2.05Mn), RENAISSANCE TECHNOLOGIES LLC (1.84Mn), VANGUARD CAPITAL MANAGEMENT LLC (1.84Mn), VANGUARD PORTFOLIO MANAGEMENT LLC (1.83Mn), LSV ASSET MANAGEMENT (1.62Mn), DIMENSIONAL FUND ADVISORS LP (1.52Mn), GEODE CAPITAL MANAGEMENT, LLC (1.34Mn).