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Puma Biotechnology, Inc. (PBYI) institutional ownership

Market cap$254M SectorHealthcare
Funds holding · Q1 2026
140
reported PBYI position changes
Top owners · Q1 2026
No disclosed owners are available.
Institutional activity · Q1 2026
Activity unavailable N/A
84 buyers · 56 sellers

Puma Biotechnology, Inc. (PBYI) price and institutional activity

Dates

Q1 2026

$0 bought by 84 investors
Millennium Management LLCLsv Asset Management +82 more
$0 sold by 56 investors
Renaissance Technologies LLCMackenzie Financial Corp +54 more
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Bought Sold Totals per quarter; hover a bar for the names.

Puma Biotechnology, Inc. (PBYI) institutional activity · 140

Investor Type Est. change Change Δ Own Date
Millennium Management LLC · Added
Change +1.5M Date Q1 2026
Millennium Management LLC Added· Q1 2026 +1.5M Q1 2026
Lsv Asset Management · Added
Change +778K Date Q1 2026
Lsv Asset Management Added· Q1 2026 +778K Q1 2026
UBS Group AG · Added
Change +407K Date Q1 2026
UBS Group AG Added· Q1 2026 +407K Q1 2026
American Century Companies Inc · Added
Change +266K Date Q1 2026
American Century Companies Inc Added· Q1 2026 +266K Q1 2026
State Board of Administration of Florida Retirement System · Added
Change +246K Date Q1 2026
State Board of Administration of Florida Retirement System Added· Q1 2026 +246K Q1 2026
JPMorgan Chase & Co · Added
Change +200K Date Q1 2026
JPMorgan Chase & Co Added· Q1 2026 +200K Q1 2026
Renaissance Technologies LLC Reduced· Q1 2026 −181K −8.5% Q1 2026
Mackenzie Financial Corp · Exited
Change −161K Δ Own −100.0% Date Q1 2026
Mackenzie Financial Corp Exited· Q1 2026 −161K −100.0% Q1 2026
Two Sigma Investments, LP · Reduced
Change −149K Δ Own −92.0% Date Q1 2026
Two Sigma Investments, LP Reduced· Q1 2026 −149K −92.0% Q1 2026
Los Angeles Capital Management LLC · Exited
Change −148K Δ Own −100.0% Date Q1 2026
Los Angeles Capital Management LLC Exited· Q1 2026 −148K −100.0% Q1 2026
AQR Capital Management LLC · Added
Change +134K Date Q1 2026
AQR Capital Management LLC Added· Q1 2026 +134K Q1 2026
Citadel Advisors LLC Reduced· Q1 2026 −133K −81.6% Q1 2026
Goldman Sachs Group Inc · Reduced
Change −124K Date Q1 2026
Goldman Sachs Group Inc Reduced· Q1 2026 −124K Q1 2026
Qube Research & Technologies Ltd · Exited
Change −112K Δ Own −100.0% Date Q1 2026
Qube Research & Technologies Ltd Exited· Q1 2026 −112K −100.0% Q1 2026
Globeflex Capital L P · Reduced
Change −103K Date Q1 2026
Globeflex Capital L P Reduced· Q1 2026 −103K Q1 2026
Data through Q1 2026 · filed Jun 2, 2026
15 of 140

Famous investor activity in Puma Biotechnology, Inc. (PBYI)

Puma Biotechnology, Inc. (PBYI) insider trading

Company insiders, action and economics first; trade and filed dates last.
Dates
Insider Title Type Price Qty Value Owned ΔOwn Trade date Filed date
Auerbach Alan H. · Director Sell −$364K
Price $8.26 Qty −44K Owned 7.3M ΔOwn −0.6% Trade date Jul 6, 2026 Filed date Jul 8, 2026
Auerbach Alan H. Director Sell $8.26 −44K −$364K 7.3M −0.6% Jul 6, 2026 Jul 8, 2026
Hunt Douglas M. · Officer Sell −$70K
Price $8.26 Qty −8K Owned 197K ΔOwn −4.1% Trade date Jul 6, 2026 Filed date Jul 8, 2026
Hunt Douglas M. Officer Sell $8.26 −8K −$70K 197K −4.1% Jul 6, 2026 Jul 8, 2026
Nougues Maximo F. · Officer Sell −$78K
Price $8.26 Qty −9K Owned 231K ΔOwn −3.9% Trade date Jul 6, 2026 Filed date Jul 8, 2026
Nougues Maximo F. Officer Sell $8.26 −9K −$78K 231K −3.9% Jul 6, 2026 Jul 8, 2026
Wilson Troy Edward · Director Sell −$78K
Price $7.20 Qty −11K Owned 60K Trade date Jun 12, 2026 Filed date Jun 15, 2026
Wilson Troy Edward Director Sell $7.20 −11K −$78K 60K Jun 12, 2026 Jun 15, 2026
Stuglik Brian M. · Director Sell −$58K
Price $7.20 Qty −8K Owned 114K Trade date Jun 12, 2026 Filed date Jun 15, 2026
Stuglik Brian M. Director Sell $7.20 −8K −$58K 114K Jun 12, 2026 Jun 15, 2026
Senderowicz Adrian · Director Sell −$194K
Price $7.20 Qty −27K Owned 27K Trade date Jun 12, 2026 Filed date Jun 15, 2026
Senderowicz Adrian Director Sell $7.20 −27K −$194K 27K Jun 12, 2026 Jun 15, 2026
Moyes Jay M. · Director Sell −$159K
Price $7.22 Qty −22K Owned 58K Trade date Jun 12, 2026 Filed date Jun 15, 2026
Moyes Jay M. Director Sell $7.22 −22K −$159K 58K Jun 12, 2026 Jun 15, 2026
Dorval Allison · Director Sell −$84K
Price $7.20 Qty −12K Owned 91K Trade date Jun 12, 2026 Filed date Jun 15, 2026
Dorval Allison Director Sell $7.20 −12K −$84K 91K Jun 12, 2026 Jun 15, 2026
Wilson Troy Edward · Director Grant (A) 27K
Owned 71K Trade date Jun 11, 2026 Filed date Jun 15, 2026
Wilson Troy Edward Director Grant (A) 27K 71K Jun 11, 2026 Jun 15, 2026
Stuglik Brian M. · Director Grant (A) 27K
Owned 122K Trade date Jun 11, 2026 Filed date Jun 15, 2026
Stuglik Brian M. Director Grant (A) 27K 122K Jun 11, 2026 Jun 15, 2026
Senderowicz Adrian · Director Grant (A) 27K
Owned 54K Trade date Jun 11, 2026 Filed date Jun 15, 2026
Senderowicz Adrian Director Grant (A) 27K 54K Jun 11, 2026 Jun 15, 2026
Miller Michael Patrick · Director Grant (A) 27K
Owned 81K Trade date Jun 11, 2026 Filed date Jun 15, 2026
Miller Michael Patrick Director Grant (A) 27K 81K Jun 11, 2026 Jun 15, 2026
Moyes Jay M. · Director Grant (A) 27K
Owned 80K Trade date Jun 11, 2026 Filed date Jun 15, 2026
Moyes Jay M. Director Grant (A) 27K 80K Jun 11, 2026 Jun 15, 2026
Dorval Allison · Director Grant (A) 27K
Owned 102K Trade date Jun 11, 2026 Filed date Jun 15, 2026
Dorval Allison Director Grant (A) 27K 102K Jun 11, 2026 Jun 15, 2026
Cesano Alessandra · Director Grant (A) 27K
Owned 69K Trade date Jun 11, 2026 Filed date Jun 15, 2026
Cesano Alessandra Director Grant (A) 27K 69K Jun 11, 2026 Jun 15, 2026
15 of 25
15 of 25 Sign in to continue to older insider transactions.

Puma Biotechnology, Inc. (PBYI) activist and large shareholders

What are Schedules 13D and 13G?

Dates
Owner/Filer identity Shares reported % of shares outstanding Filing date
Auerbach Alan H 10.2M
% of shares outstanding 20.5% Filing date Dec 13, 2022
Auerbach Alan H 10.2M 20.5% Dec 13, 2022
Vanguard Group Inc 3.8M
% of shares outstanding 8.0% Filing date Feb 13, 2024
Vanguard Group Inc 3.8M 8.0% Feb 13, 2024
Blackrock, Inc. 3.8M
% of shares outstanding 7.8% Filing date Nov 8, 2024
Blackrock, Inc. 3.8M 7.8% Nov 8, 2024
Integrated Core Strategies (us) LLC 1.8M
% of shares outstanding 4.3% Filing date Nov 19, 2021
Integrated Core Strategies (us) LLC 1.8M 4.3% Nov 19, 2021
BlackRock Inc. 1.9M
% of shares outstanding 4.2% Filing date Jul 8, 2022
BlackRock Inc. 1.9M 4.2% Jul 8, 2022
Acorn Bioventures, L.P. 1.7M
% of shares outstanding 3.3% Filing date Feb 14, 2025
Acorn Bioventures, L.P. 1.7M 3.3% Feb 14, 2025
Integrated Core Strategies (us) LLC 1.4M
% of shares outstanding 2.8% Filing date Feb 3, 2025
Integrated Core Strategies (us) LLC 1.4M 2.8% Feb 3, 2025
Alger Associates Inc 890K
% of shares outstanding 2.2% Filing date Nov 10, 2021
Alger Associates Inc 890K 2.2% Nov 10, 2021
8 of 12

Puma Biotechnology, Inc. (PBYI) ownership FAQ

Who owns PBYI?

140 reporting institutions disclosed PBYI position changes in the Q1 2026 snapshot.

How is institutional activity calculated?

For each manager, WhoBought compares accepted consecutive 13F share counts. Share change is current shares minus prior shares. Estimated dollar change is that signed share change multiplied by the split-adjusted quarter-mean close. The activity table on this page uses Q1 2026.

What are activist and large shareholder filings?

An investor crossing 5% of a share class generally files Schedule 13D for activist intent or Schedule 13G for a passive position. The technical form names appear here rather than in the activity rows.

Where does this data come from?

Ownership and institutional activity come from SEC Form 13F filings. Insider activity comes from SEC Form 4, and large-shareholder activity from SEC Schedules 13D and 13G. FMP supplies price data only. Company logos use the local verified Parqet cache with one shared fallback.

Why are ownership reports delayed?

Form 13F is a quarterly disclosure and is normally filed after the quarter ends. Every ownership and activity value therefore names its represented period; it is not presented as a live position.

How are missing table values shown?

A muted dash marks a missing table value. It means the filing omitted the value, comparable data is unavailable, or no prior position exists for comparison.