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Who owns Puma Biotechnology (PBYI) stock

152 funds reported Puma Biotechnology (PBYI) shares in their latest 13F filings, worth $318M in all. The largest holder is Acorn Capital Advisors, LLC ($33.5M). Last quarter 73 funds added to their stakes and 63 cut them.

Largest holders of PBYI (13F)Largest holders of PBYI (13F)Acorn Capital Advisors, LLC$33.5MBlackRock$30.9MVanguard Group$22.6MAmerican Century Companies$18.8MAcadian Asset Management LLC$16.6MRenaissance Technologies LLC$14.9MVanguard Capital Management LLC$14.9MVanguard Portfolio Management LLC$14.8MDimensional Fund Advisors LP$12.3MGeode Capital Management, LLC$10.9M

Largest holders (13F)

FundSharesValueChangeQuarter
Acorn Capital Advisors, LLC4,131,299$33.5Munchanged2026-06-30
BlackRock3,804,736$30.9Mincrease2026-06-30
Vanguard Group3,797,748$22.6Mincrease2025-12-31
American Century Companies2,319,996$18.8Mincrease2026-06-30
Acadian Asset Management LLC2,053,523$16.6Mincrease2026-06-30
Renaissance Technologies LLC1,836,213$14.9Mdecrease2026-06-30
Vanguard Capital Management LLC1,835,643$14.9Mincrease2026-06-30
Vanguard Portfolio Management LLC1,825,599$14.8Mincrease2026-06-30
Dimensional Fund Advisors LP1,518,014$12.3Mincrease2026-06-30
Geode Capital Management, LLC1,339,405$10.9Mincrease2026-06-30
O'Shaughnessy Asset Management, LLC1,123,783$9.1Mdecrease2026-06-30
State Street952,165$7.7Mincrease2026-06-30
Kennedy Capital Management LLC873,253$7.1Mdecrease2026-06-30
Bridgeway Capital Management, LLC791,616$6.4Mincrease2026-06-30
Ritholtz Wealth Management749,798$6.1Mdecrease2026-06-30

Puma Biotechnology's latest quarter

Puma Biotechnology, Q3 2026: revenue $55.1M (+1% year over year), operating margin 9.6%, net earnings $6.0M. The chart follows the revenue to costs, profit and cash.

Questions

Who owns the most PBYI stock?

By the latest 13F filings: Acorn Capital Advisors, LLC ($33.5M); BlackRock ($30.9M); Vanguard Group ($22.6M); American Century Companies ($18.8M); Acadian Asset Management LLC ($16.6M).

What is the short interest in PBYI?

4,540,314 shares were sold short at the 2026-10-15 settlement, 6.46% of the float.

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Updated Nov 8, 2026. Read automatically from SEC filings and public data; errors are possible. Not investment advice.