13F Insight
DOSSIER · 13F Holders · Q1 2026CyclicalNet sold
PBYI

PUMA BIOTECHNOLOGY INC

161 institutions still hold PUMA BIOTECHNOLOGY INC as of Q1 2026. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.

CUSIP 74587V107·161 13F holders·last filed Mar 31, 2026
Market cap
—
▲ 4.3%
vs prior quarter
13F value held
$176M
79.0% inst. owned
of float
Holders
161
-51 QoQ
filers reporting
Activity
+56 / −88
+963 added · −845 reduced
this quarter
Concentration
15.00%
ACORN CAPITAL ADVISORS, LLC #1
top holder share
AI Holders Summary · Q1 2026

161 institutions reported PBYI in Q1 2026. ACORN CAPITAL ADVISORS, LLC leads at 15.0% of the visible book. -51 net institutions QoQ — distribution reading.

Top holders

Sorted by position value. Source: SEC EDGAR 13F-HR filings.

#HolderValueShares% port.Quarter
01
ACORN CAPITAL ADVISORS, LLC
CIK 0002054410
$26M4.1M7.50%Q1 202602
BlackRock, Inc.
CIK 0002012383
$23M3.6M0.00%Q1 202603
RENAISSANCE TECHNOLOGIES LLC
CIK 0001037389
$12M1.9M0.02%Q1 202604
AMERICAN CENTURY COMPANIES INC
CIK 0000748054
$12M1.9M0.01%Q1 202605
VANGUARD CAPITAL MANAGEMENT LLC
CIK 0002100119· Index
$12M1.8M0.00%Q1 202606
Vanguard Portfolio Management
CIK 0002100121
$11M1.7M0.00%Q1 202607
MILLENNIUM MANAGEMENT LLC
CIK 0001273087
$9M1.5M0.00%Q1 202608
DIMENSIONAL FUND ADVISORS LP
CIK 0000354204· Quasi-passive
$9M1.4M0.00%Q1 202609
O'SHAUGHNESSY ASSET MANAGEMENT, LLC
CIK 0001423442
$7M1.1M0.04%Q1 202610
GEODE CAPITAL MANAGEMENT, LLC
CIK 0001214717· Index
$7M1.0M0.00%Q1 202611
STATE STREET CORP
CIK 0000093751
$6M918K0.00%Q1 202612
KENNEDY CAPITAL MANAGEMENT LLC
CIK 0000884589
$6M890K0.12%Q1 202613
AQR CAPITAL MANAGEMENT LLC
CIK 0001167557
$5M800K0.00%Q1 202614
Connor, Clark & Lunn Investment Management Ltd.
CIK 0001596800
$5M783K0.01%Q1 202615
BRIDGEWAY CAPITAL MANAGEMENT, LLC
CIK 0001107261
$5M775K0.10%Q1 202616
RITHOLTZ WEALTH MANAGEMENT
CIK 0001698218
$5M774K0.09%Q1 202617
GOLDMAN SACHS GROUP INC
CIK 0000886982
$4M670K0.00%Q1 202618
NORTHERN TRUST CORP
CIK 0000073124· Index
$4M642K0.00%Q1 202619
ARROWSTREET CAPITAL, LIMITED PARTNERSHIP
CIK 0001164508
$3M538K0.00%Q1 202620
UBS Group AG
CIK 0001610520
$3M534K0.00%Q1 2026
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