PROTHENA CORP PLC

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PRTA·G72800108·US·equity·Healthcare - Biotechnology-Activist

PRTA (PROTHENA CORP PLC) is held by 95 institutional investors as of Q1 2026. Largest holders: FMR LLC ($73.4M), BlackRock, Inc. ($45.1M), STATE STREET CORP ($18.8M). Net institutional sentiment: Mixed.

95

Holders

Avg rating(11 Elite)

$307.3M

Total Value

55% (104)

Fund Consensus

51 buying - 42 selling

Smart Money Verdict

View all

51Mixed MomentumStrong Convergence

Institutional (13F)50

Insider (Form 4)54

Activist (13D/13G)50

Congressional (STOCK Act)

No data

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See how PRTA's score breaks down across 4 SEC sources

Holder Quality

11

★★★★★

Elite

30

★★★★

Strong

33

★★★

Solid

23

★★

Below

7

★

Weak

Held by 95 funds

11 elite

Who's Trading

InsiderSPSCULLY WILLIAM PBuy $981KMay 22, 2026

ActivistRURubric Capital Management LP9.3%May 15, 2026

ActivistSWSCULLY WILLIAM P10.3%May 11, 2026

InsiderUNUnknownBuy $1.3MJan 14, 2025

InsiderUNUnknownBuy $390KDec 31, 2024

InsiderUNUnknownBuy $11KDec 31, 2024

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13F: Mar 31, 2026Insider & Congress: Updated regularly

Positions (95)History

AllNewIncreasedHeldDecreasedExited

Fund	Action	Shares	Value	Weight	Est. P&L	Conviction
FMR LLC	Unchanged	7.6M	$73.4M	0.0%	-34.41%	0
BlackRock, Inc.	Increased	4.6M(+13.1%)	$45.1M	0.0%	-28.40%	33
STATE STREET CORP	Decreased	1.9M(-14.5%)	$18.8M	0.0%	-46.79%	0
DED. E. Shaw & Co., Inc.	Increased	1.8M(+4.9%)	$17.1M	0.0%	+9.63%	30
MORGAN STANLEY	Decreased	1.2M(-1.3%)	$12M	0.0%	-31.69%	0
TWO SIGMA INVESTMENTS, LP	Increased	1.2M(+80.0%)	$11.7M	0.0%	+8.27%	43
GEODE CAPITAL MANAGEMENT, LLC	Increased	1.1M(+3.3%)	$10.7M	0.0%	-63.65%	29
FEDERATED HERMES, INC.	Increased	1.1M(+8.8%)	$10.3M	0.0%	-8.97%	30
JACOBS LEVY EQUITY MANAGEMENT, INC	Decreased	972,017(-0.6%)	$9.4M	0.0%	+34.82%	0
GOLDMAN SACHS GROUP INC	Decreased	818,885(-12.4%)	$8M	0.0%	-13.64%	0
DIMENSIONAL FUND ADVISORS LP	Increased	782,603(+0.9%)	$7.6M	0.0%	-77.14%	28
Nuveen, LLC	Increased	759,368(+0.0%)	$7.4M	0.0%	-4.78%	27
Qube Research & Technologies Ltd	Increased	614,603(+50.8%)	$6M	0.0%	+22.14%	38
RENAISSANCE TECHNOLOGIES LLC	Increased	607,515(+39.5%)	$5.9M	0.0%	-16.51%	36
Mariner, LLC	Decreased	563,082(-2.6%)	$5.5M	0.0%	-60.25%	0
CITADEL ADVISORS LLC	Decreased	435,574(-52.3%)	$4.2M	0.0%	+27.62%	0
BNP PARIBAS FINANCIAL MARKETS	Increased	424,596(+0.1%)	$4.1M	0.0%	+1.37%	27
Point72 Asset Management, L.P.	Decreased	399,830(-53.5%)	$3.9M	0.0%	+1.16%	0
BANK OF AMERICA CORP /DE/	Decreased	393,632(-7.9%)	$3.8M	0.0%	-6.61%	0
Man Group plc	Increased	381,574(+41.6%)	$3.7M	0.0%	-1.43%	36

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High Conviction Moves-Signal Convergence-Fund Consensus-Double-Down Signals

Data sourced from four SEC data sources: 13F, Form 4, 13D/13G, and STOCK Act. Not financial advice. Full disclaimer