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PRTA Institutional Ownership & 13F Holders | SmartMoneyDB

PRTAPROTHENA CORP PLC

SHS · CUSIP G72800108

Smart Money Ownership

Of the 9 tracked institutions holding PRTA, 3 have a 3-year clone track record — 3 of them beat the S&P. Average holder's clone alpha: +5.5pt. It's a gauge of who owns the name, not just how many.

PRICE T ROWE ASSOCIATES INC /MD/

$1.1M

+3.5pt

Alpha = the manager's 3-year clone return minus the S&P 500. A skilled roster is a stronger tell than a crowded one — though even skilled managers' edge doesn't reliably survive the 13F disclosure lag. Why →

PRTA (PROTHENA CORP PLC) Institutional Ownership Summary

Among the 9 tracked institutional investors we monitor, PRTA (PROTHENA CORP PLC) is held with a combined value of $180.28M across 18,477,155 shares. The largest holder is FMR LLC with a position worth $70.48M. 7 funds increased their holdings. 2 funds reduced their position.

Total Institutional Value

$180.28M

Total Shares Held

18,477,155

Institutional Holders

This Quarter's Biggest Movers

Ranked by estimated dollars moved (share change × implied price). 13F data lags up to 45 days.

Biggest Buyers

STATE STREET CORP+24% shares~$4.5M BlackRock, Inc.+5% shares~$2.2M TWO SIGMA ADVISERS, LP+61% shares~$1.5M AQR CAPITAL MANAGEMENT LLC+48% shares~$964.8K RENAISSANCE TECHNOLOGIES LLC+15% shares~$880.5K

13F Institutional Holders

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RENAISSANCE TECHNOLOGIES LLC

0.01% of book+14.8%

$6.83M

TWO SIGMA ADVISERS, LP

AQR CAPITAL MANAGEMENT LLC

0.00% of book+48.3%

$2.96M

PRICE T ROWE ASSOCIATES INC /MD/

0.00% of book+14.2%

$1.07M

#	Fund	Value↓	Shares	Portfolio %	Change
1	FMR LLC	$70.48M	7,199,218	0.00%	-4.7%
2	BlackRock, Inc.	$47.66M	4,867,955	0.00%	+4.8%
3	STATE STREET CORP	$23.43M	2,393,424	0.00%	+23.5%
4	VANGUARD GROUP INC	$20.45M	2,140,909	0.00%	+4.4%
5	RENAISSANCE TECHNOLOGIES LLC	$6.83M	697,615	0.01%	+14.8%
6	TWO SIGMA ADVISERS, LP	$4.08M	427,400	0.01%	+60.9%
7	CITADEL ADVISORS LLC	$3.32M	338,810	0.00%	-22.2%
8	AQR CAPITAL MANAGEMENT LLC	$2.96M	302,572	0.00%	+48.3%
9	PRICE T ROWE ASSOCIATES INC /MD/	$1.07M	109,252	0.00%	+14.2%

Activist & Large Holders (13D/13G)

Investor	Ownership	Type	Filed
Fennell Todd W.	10.2%	13G/A	2026-08-19
Fennell Todd W.	9.8%

Frequently Asked Questions

Which institutional investors own the most PRTA stock?

As of the latest SEC 13F filings, FMR LLC is the largest institutional holder of PRTA with a position worth $70.48M, representing 0.00% of their portfolio. In total, 9 institutional investors hold PRTA with a combined value of $180.28M.

What percentage of PRTA is owned by institutional investors?

Institutional investors hold $180.28M worth of PRTA stock across 9 positions. The largest institutional holder is FMR LLC with $70.48M in holdings.

What is a 13F filing and why does it matter for PRTA?

A 13F filing is a quarterly report required by the SEC from institutional investment managers with over $100 million in assets. It discloses their holdings in U.S. equities. For PRTA, these filings reveal which major funds are accumulating or reducing positions, providing insights into institutional sentiment.

Track PRTA institutional moves

Get notified when hedge funds change their PRTA positions.