Prothena (PRTA) Ownership - Who Owns Prothena?

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Prothena (PRTA) Ownership Overview

1.26% Insiders

20.04% Mutual Funds

23.70% Other Institutional Investors

9.36% ETFs

45.64% Public Companies and

Individual Investors

The ownership structure of Prothena (PRTA) stock is a mix of institutional, retail, and individual investors. Approximately 53.10% of the company’s stock is owned by Institutional Investors, 1.26% is owned by Insiders, and 45.64% is owned by Public Companies and Individual Investors.

The ownership structure of Prothena (PRTA) stock is a mix of institutional, retail, and individual investors. Approximately 43.73% of the company’s stock is owned by Institutional Investors, 1.26% is owned by Insiders, and 9.36% is owned by Public Companies and Individual Investors.

Recent Insider Trading Activity

Date	Name	Activity	Value
May 06, 2025	Ecor1 Capital, Llc	xxxxxxxxxxxxx	$50825217
May 02, 2025	William Scully	xxxxxxxxxxxxx	$2749173

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Recent Hedge Fund Trading Activity

Date	Firm	Activity	Value
Dec 31, 2023	Graham Capital Management, L.p.	xxxxxxxxxxxxx	$124610

Show More Hedge Fund Trading Activity >

Top Shareholders

# of Shares	Type	% Holding	Value
3,482,656	Institution	6.65%	32,771,793
1,885,759	Institution	3.60%	17,744,992
1,132,901	Institution	2.16%	10,660,598
887,002	Institution	1.69%	8,346,689
874,495	Institution	1.67%	8,228,998
643,917	Institution	1.23%	6,059,259
617,222	Institution	1.18%	5,808,059
534,244	Institution	1.02%	5,027,236
482,716	Institution	0.92%	4,542,358
481,039	Institution	0.92%	4,526,577

Top Mutual Fund Holders

# of Shares	Type	% Holding	Value
3,482,656	Institution	6.65%	32,771,793
887,002	Institution	1.69%	8,346,689
643,917	Institution	1.23%	6,059,259
617,222	Institution	1.18%	5,808,059
534,244	Institution	1.02%	5,027,236
482,716	Institution	0.92%	4,542,358
481,039	Institution	0.92%	4,526,577
456,369	Institution	0.87%	4,294,432
433,516	Institution	0.83%	4,079,386
321,955	Institution	0.61%	3,029,597

Top ETF Holders

Holder	# of Shares	Type	% Holding	Value
SPDR S&P BIOTECH ETF	1,060,311	Institution	2.03%	10,253,207
iShares Russell 2000 ETF	1,039,305	Institution	1.99%	9,800,646
Vanguard Extended Market ETF	484,126	Institution	0.92%	4,705,705
iShares Russell 2000 Value ETF	349,337	Institution	0.67%	3,294,248
iShares Biotechnology ETF	322,571	Institution	0.62%	3,041,845
Vanguard Russell 2000 ETF	216,290	Institution	0.41%	2,102,339
Schwab U.S. Small-Cap ETF	207,570	Institution	0.40%	2,007,202
U.S. Micro Cap Portfolio ETF	174,964	Institution	0.33%	1,516,938
Dimensional U.S. Small Cap ETF	172,723	Institution	0.33%	1,670,231
Vanguard Health Care ETF	137,160	Institution	0.26%	1,333,195

FAQ

Who Owns Prothena (PRTA)?

According to the latest TipRanks data, approximately 23.70% of the company's stock is held by institutional investors, 1.26% is held by insiders, and 45.64% is held by retail investors.

What percentage of Prothena (PRTA) stock is held by institutional investors?

According to the latest TipRanks data, approximately 23.70% of Prothena (PRTA) stock is held by institutional investors.

What percentage of Prothena (PRTA) stock is held by retail investors?

According to the latest TipRanks data, approximately 45.64% of Prothena (PRTA) stock is held by retail investors.

Who owns the most shares of Prothena (PRTA)?

Fidelity Mt. Vernon Street Trust owns the most shares of Prothena (PRTA).

What is the significance of the ownership structure for a publicly traded company?

The ownership structure can impact the company's decision making, as large institutional investors may exert influence on the company's management and can also affect the company's stock price with their buying and selling patterns.