PROTHENA CORP PLC

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PRTA·G72800108·US·Common Stock·Healthcare - Biotechnology-13D/G

PRTA (PROTHENA CORP PLC) is held by 99 institutional investors as of Q2 2026. Largest holders: FMR LLC ($70.5M), BlackRock, Inc. ($47.7M), STATE STREET CORP ($23.4M). Net institutional sentiment: Mixed.

99

Holders

(9 Elite)

$337.6M

Total Value

53% (98)

Consensus

52 buying - 46 selling

13F: Jun 30, 2026Insider & Congress: Updated regularly

Smart Money Verdict

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Institutional (13F)78

Insider (Form 4)53

Activist (13D/13G)46

Congressional (STOCK Act)81

Holder Quality

74

★★★★★

Elite

20

★★★★

Strong

82

★★★

Solid

40

★★

Below

21

★

Weak

Held by 99 funds

9 elite

Who's Trading

Source dates: Price Aug 27, 2026 · Insiders Aug 21, 2026 · Activists Aug 19, 2026 · Congress none

InsiderSPSCULLY WILLIAM PBuy $439KAug 20, 2026

ActivistFTFennell Todd W.10.2%Aug 19, 2026

InsiderSPSCULLY WILLIAM PGift 628K shAug 18, 2026

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Top Holders

Top Holders (99)History

AllNewIncreasedHeldDecreasedExited

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Fund	Action	Shares	Value	Weight	Est. P&L	Conviction
FMR LLC	Decreased	7.2M(-4.7%)	$70.5M	0.0%	-37.84%	0
BlackRock, Inc.	Increased	4.9M(+4.8%)	$47.7M	0.0%	-31.25%	31
STATE STREET CORP	Increased	2.4M(+23.5%)	$23.4M	0.0%	-44.67%	35
VPVANGUARD PORTFOLIO MANAGEMENT LLC	Increased	1.7M(+14.2%)	$16.2M	0.0%	-1.74%	32
DED. E. Shaw & Co., Inc.	Decreased	1.6M(-8.6%)	$15.8M	0.0%	+3.91%	0
TWO SIGMA INVESTMENTS, LP	Increased	1.3M(+4.9%)	$12.4M	0.0%	+2.20%	29
GEODE CAPITAL MANAGEMENT, LLC	Increased	1.1M(+2.5%)	$11M	0.0%	-66.11%	28
FEDERATED HERMES, INC.	Increased	1.1M(+2.3%)	$10.6M	0.0%	-13.56%	28
MORGAN STANLEY	Decreased	995,348(-19.1%)	$9.7M	0.0%	-35.26%	0
GOLDMAN SACHS GROUP INC	Increased	979,730(+19.6%)	$9.6M	0.0%	-16.31%	33
JACOBS LEVY EQUITY MANAGEMENT, INC	Decreased	965,988(-0.6%)	$9.5M	0.0%	+27.78%	0
DIMENSIONAL FUND ADVISORS LP	Increased	905,651(+15.7%)	$8.9M	0.0%	-75.80%	32
Qube Research & Technologies Ltd	Increased	791,169(+28.7%)	$7.7M	0.0%	+10.22%	34
RENAISSANCE TECHNOLOGIES LLC	Increased	697,615(+14.8%)	$6.8M	0.0%	-19.18%	31
Man Group plc	Increased	678,116(+77.7%)	$6.6M	0.0%	-6.12%	41
Mariner, LLC	Increased	625,095(+11.0%)	$6.1M	0.0%	-59.94%	30
Nuveen, LLC	Decreased	557,157(-26.6%)	$5.5M	0.0%	-9.75%	0
VAVANGUARD CAPITAL MANAGEMENT LLC	Decreased	479,945(-0.9%)	$4.7M	0.0%	-1.18%	0
NORTHERN TRUST CORP	Increased	457,124(+23.7%)	$4.5M	0.0%	-56.84%	33
CHARLES SCHWAB INVESTMENT MANAGEMENT INC	Decreased	355,896(-0.2%)	$3.5M	0.0%	-62.73%	0

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High Conviction Moves-Smart Money Convergence-Fund Consensus-Double-Down Detection

Data sourced from four public-disclosure sources: SEC 13F, Form 4, 13D/13G, and House/Senate STOCK Act disclosures. Not financial advice. Full disclaimer