13F Insight
DOSSIER · 13F Holders · Q2 2026

PROTHENA CORP PLC

202 institutions still hold PROTHENA CORP PLC as of Q2 2026. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.

CUSIP G72800108·202 13F holders·last filed Jun 30, 2026
Market cap
—
13F value held
$363M
visible holders
Holders
202
filers reporting
Concentration
19.41%
FMR LLC #1
top holder share
AI Holders Summary · Q2 2026

202 institutions reported PROTHENA CORP PLC in Q2 2026. FMR LLC leads at 19.4% of the visible book.

Top holders

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

#HolderValueShares% port.Quarter
01
FMR LLC
CIK 0000315066
$70M7.2M0.00%Q2 202602
Rubric Capital Management LP
CIK 0001687509
$49M5.0M0.45%Q2 202603
BlackRock, Inc.
CIK 0002012383
$48M4.9M0.00%Q2 202604
STATE STREET CORP
CIK 0000093751
$23M2.4M0.00%Q2 202605
Vanguard Portfolio Management
CIK 0002100121· Index
$16M1.7M0.00%Q2 202606
D. E. Shaw & Co., Inc.
CIK 0001009207
$16M1.7M0.01%Q4 202507
ADAR1 Capital Management, LLC
CIK 0001940272
$15M1.6M0.70%Q2 202608
ACADIAN ASSET MANAGEMENT LLC
CIK 0000916542
$15M1.5M0.02%Q1 202609
TWO SIGMA INVESTMENTS, LP
CIK 0001179392
$12M1.3M0.01%Q2 202610
Palo Alto Investors LP
CIK 0001306923
$11M1.1M1.55%Q2 202611
GEODE CAPITAL MANAGEMENT, LLC
CIK 0001214717· Index
$11M1.1M0.00%Q2 202612
FEDERATED HERMES, INC.
CIK 0001056288
$11M1.1M0.02%Q2 202613
MORGAN STANLEY
CIK 0000895421
$10M995K0.00%Q2 202614
GOLDMAN SACHS GROUP INC
CIK 0000886982
$10M980K0.00%Q2 202615
JACOBS LEVY EQUITY MANAGEMENT, INC
CIK 0000884414
$9M972K0.04%Q1 202616
DIMENSIONAL FUND ADVISORS LP
CIK 0000354204· Quasi-passive
$9M906K0.00%Q2 202617
Qube Research & Technologies Ltd
CIK 0001729829
$8M791K0.01%Q2 202618
RENAISSANCE TECHNOLOGIES LLC
CIK 0001037389
$7M698K0.01%Q2 202619
Man Group plc
CIK 0001637460
$7M678K0.01%Q2 202620
Mariner, LLC
CIK 0001373442
$6M625K0.01%Q2 2026
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