13F Insight
DOSSIER · 13F Holders · Q1 2026Most-boughtAI cap-ex
PTGX

PROTAGONIST THERAPEUTICS INC

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

CUSIP 74366E102·309 13F holders·last filed Mar 31, 2026
Market cap
—
— 0.0%
vs prior quarter
13F value held
$6.0B
47.0% inst. owned
of float
Holders
309
+55 QoQ
filers reporting
Activity
+8 / −96
+786 added · −644 reduced
this quarter
Concentration
17.12%
BlackRock, Inc. #1
top holder share
AI Holders Summary · Q1 2026

309 institutions reported PTGX in Q1 2026. BlackRock, Inc. leads at 17.1% of the visible book. +55 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
$1.0B9.8M0.02%Q1 202602
FARALLON CAPITAL MANAGEMENT LLC
CIK 0000909661
$669M6.3M3.81%Q1 202603
UBS Group AG
CIK 0001610520
$546M5.2M0.08%Q1 202604
RTW INVESTMENTS, LP
CIK 0001493215
$533M5.1M5.31%Q1 202605
WELLINGTON MANAGEMENT GROUP LLP
CIK 0000902219
$379M3.6M0.07%Q1 202606
Vanguard Portfolio Management
CIK 0002100121
$367M3.5M0.02%Q1 202607
STATE STREET CORP
CIK 0000093751
$329M3.1M0.01%Q1 202608
JANUS HENDERSON GROUP PLC
CIK 0001274173
$305M2.9M0.15%Q1 202609
VANGUARD CAPITAL MANAGEMENT LLC
CIK 0002100119· Index
$296M2.8M0.01%Q1 202610
JOHNSON & JOHNSON
CIK 0000200406
$258M2.4M39.57%Q1 202611
Invesco Ltd.
CIK 0000914208
$228M2.2M0.03%Q1 202612
GEODE CAPITAL MANAGEMENT, LLC
CIK 0001214717· Index
$176M1.7M0.01%Q1 202613
Woodline Partners LP
CIK 0001784547
$149M1.4M0.56%Q1 202614
BANK OF AMERICA CORP /DE/
CIK 0000070858
$137M1.3M0.01%Q1 202615
PERCEPTIVE ADVISORS LLC
CIK 0001224962
$130M1.2M2.54%Q1 202616
MORGAN STANLEY
CIK 0000895421
$107M1.0M0.01%Q1 202617
CITADEL ADVISORS LLC
CIK 0001423053
$107M1.2M0.02%Q4 202518
ADAR1 Capital Management, LLC
CIK 0001940272
$105M994K6.17%Q1 202619
Hood River Capital Management LLC
CIK 0001578177
$87M829K0.88%Q1 202620
GOLDMAN SACHS GROUP INC
CIK 0000886982
$82M779K0.01%Q1 2026
Page 1 of 16
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