13F Insight
DOSSIER · 13F Holders · Q1 2026

PROTHENA CORP PLC

197 institutions still hold PROTHENA CORP PLC as of Q1 2026. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.

CUSIP G72800108·197 13F holders·last filed Mar 31, 2026
Market cap
—
13F value held
$344M
visible holders
Holders
197
filers reporting
Concentration
21.34%
FMR LLC #1
top holder share
AI Holders Summary · Q1 2026

197 institutions reported PROTHENA CORP PLC in Q1 2026. FMR LLC leads at 21.3% of the visible book.

Top holders

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

#HolderValueShares% port.Quarter
01
FMR LLC
CIK 0000315066
$73M7.6M0.00%Q1 202602
BlackRock, Inc.
CIK 0002012383
$45M4.6M0.00%Q1 202603
Rubric Capital Management LP
CIK 0001687509
$35M3.7M0.42%Q4 202504
STATE STREET CORP
CIK 0000093751
$19M1.9M0.00%Q1 202605
D. E. Shaw & Co., Inc.
CIK 0001009207
$16M1.7M0.01%Q4 202506
ADAR1 Capital Management, LLC
CIK 0001940272
$15M1.6M0.90%Q1 202607
ACADIAN ASSET MANAGEMENT LLC
CIK 0000916542
$15M1.5M0.02%Q1 202608
Vanguard Portfolio Management
CIK 0002100121· Index
$14M1.4M0.00%Q1 202609
MORGAN STANLEY
CIK 0000895421
$12M1.2M0.00%Q1 202610
Palo Alto Investors LP
CIK 0001306923
$12M1.2M1.80%Q1 202611
TWO SIGMA INVESTMENTS, LP
CIK 0001179392
$12M1.2M0.01%Q1 202612
GEODE CAPITAL MANAGEMENT, LLC
CIK 0001214717· Index
$11M1.1M0.00%Q1 202613
FEDERATED HERMES, INC.
CIK 0001056288
$10M1.1M0.02%Q1 202614
CITADEL ADVISORS LLC
CIK 0001423053
$10M1.1M0.00%Q4 202515
JACOBS LEVY EQUITY MANAGEMENT, INC
CIK 0000884414
$9M972K0.04%Q1 202616
GOLDMAN SACHS GROUP INC
CIK 0000886982
$8M819K0.00%Q1 202617
DIMENSIONAL FUND ADVISORS LP
CIK 0000354204· Quasi-passive
$8M783K0.00%Q1 202618
Nuveen, LLC
CIK 0001871926
$7M759K0.00%Q1 202619
Qube Research & Technologies Ltd
CIK 0001729829
$6M615K0.01%Q1 202620
RENAISSANCE TECHNOLOGIES LLC
CIK 0001037389
$6M608K0.01%Q1 2026
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