BlackRock, Inc.

Position in PRTA — Prothena Corp Public Ltd Co

CIK 2012383 New York, NY

Position in PRTA

as of Jun 30, 2026 · filed Aug 7, 2026 Compact

Position Value

$47,657,275

+$2,516,044 QoQ

Shares Held

4,867,955

+4.8% QoQ

Ownership

9.48%

of shares outstanding

% of Portfolio

0.00%

of 13F equity value

Holder Rank

of 187 holders

Holding Since

Sep 2024

8 quarters on record

Voting authority Sole 96% Shared 0% None 4%

Healthcare · as of Jun 30, 2026

BlackRock, Inc. holds $85,016,936,299 across 474 Biotechnology names. PRTA ranks #169 (0.1% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	VRTX	Vertex Pharmaceuticals Inc / Ma	24,109,373	$11,975,848,839
2	REGN	Regeneron Pharmaceuticals, Inc.	9,113,506	$5,682,635,520
3	ALNY	Alnylam Pharmaceuticals, Inc.	10,907,675	$3,283,537,392
4	RVMD	Revolution Medicines, Inc.	13,695,790	$2,564,947,540
5	MRNA	Moderna, Inc.	30,599,409	$2,142,876,602
6	INCY	Incyte Corp	18,032,718	$2,044,188,902
7	CYTK	Cytokinetics Inc	20,094,362	$1,711,838,691
8	ROIV	Roivant Sciences Ltd.	48,236,091	$1,707,075,250

9 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-06-30	$47,657,275	4,867,955	+4.8%	Shares	Sole	2026-08-07
2026-06-30	$35,121,429	3,587,480	—	Shares	Sole	2026-07-29
2026-03-31	$45,141,231	4,644,160	+13.1%	Shares	Sole	2026-05-13
2025-12-31	$39,226,227	4,107,459	+14.1%	Shares	Sole	2026-02-12
2025-09-30	$35,120,544	3,598,417	-8.7%	Shares	Sole	2025-11-12
2025-06-30	$23,912,136	3,939,398	-2.5%	Shares	Sole	2025-08-12
2025-03-31	$50,023,467	4,042,301	-1.9%	Shares	Sole	2025-05-02
2024-12-31	$57,094,902	4,122,376	+2.3%	Shares	Sole	2025-02-07
2024-09-30	$67,394,908	4,028,387	—	Shares	Sole	2024-11-13
No filing history on record for this holder in this stock.