13F Insight
DOSSIER · 13F Holders · Q1 2026Healthcare · Pharmaceutical PreparationsCheap mega-capRe-rated
ARWR

ARROWHEAD PHARMACEUTICALS IN

452 institutions still hold ARROWHEAD PHARMACEUTICALS IN as of Q1 2026. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.

CUSIP 04280A100·Pharmaceutical Preparations·452 13F holders·last filed Mar 31, 2026
Market cap
—
▲ 4.0%
vs prior quarter
13F value held
$5.4B
50.0% inst. owned
of float
Holders
452
+37 QoQ
filers reporting
Activity
+8 / −38
+991 added · −912 reduced
this quarter
Concentration
21.23%
BlackRock, Inc. #1
top holder share
AI Holders Summary · Q1 2026

452 institutions reported ARWR in Q1 2026. BlackRock, Inc. leads at 21.2% of the visible book. +37 net new institutions vs prior quarter — accumulation reading.

Top holders

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

#HolderValueShares% port.Quarter
01
BlackRock, Inc.
CIK 0002012383
$1.1B18.2M0.02%Q1 202602
Avoro Capital Advisors LLC
CIK 0001633313
$671M10.7M6.60%Q1 202603
FMR LLC
CIK 0000315066
$456M7.3M0.02%Q1 202604
Vanguard Portfolio Management
CIK 0002100121
$448M7.1M0.02%Q1 202605
STATE STREET CORP
CIK 0000093751
$407M6.5M0.01%Q1 202606
VANGUARD CAPITAL MANAGEMENT LLC
CIK 0002100119· Index
$378M6.0M0.01%Q1 202607
GEODE CAPITAL MANAGEMENT, LLC
CIK 0001214717· Index
$275M4.3M0.02%Q1 202608
FRED ALGER MANAGEMENT, LLC
CIK 0000003520
$210M3.3M0.92%Q1 202609
Invesco Ltd.
CIK 0000914208
$206M3.3M0.03%Q1 202610
BAKER BROS. ADVISORS LP
CIK 0001263508
$144M2.2M0.85%Q4 202511
Vestal Point Capital, LP
CIK 0001974915
$143M2.3M3.99%Q1 202612
DEERFIELD MANAGEMENT COMPANY, L.P.
CIK 0001009258
$122M1.8M1.55%Q4 202513
SUSQUEHANNA INTERNATIONAL GROUP, LLP
CIK 0001446194· Market maker
$115M1.8M0.01%Q1 202614
GOLDMAN SACHS GROUP INC
CIK 0000886982
$109M1.7M0.01%Q1 202615
NORTHERN TRUST CORP
CIK 0000073124· Index
$104M1.7M0.01%Q1 202616
Siren, L.L.C.
CIK 0002005245
$101M1.6M2.81%Q1 202617
JANUS HENDERSON GROUP PLC
CIK 0001274173
$90M1.4M0.04%Q1 202618
UBS Group AG
CIK 0001610520
$84M1.3M0.01%Q1 202619
UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC
CIK 0000861177
$83M1.3M0.02%Q1 202620
Pictet Asset Management Holding SA
CIK 0001993888
$80M1.3M0.08%Q1 2026
Page 1 of 23
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