FMR LLC

Position in PRTA — Prothena Corp Public Ltd Co

CIK 315066 BOSTON, MA

Back to PRTA Full portfolio

Position in PRTA

as of Jun 30, 2026 · filed Aug 13, 2026 Compact

Position Value

$70,480,343

-$2,917,495 QoQ

Shares Held

7,199,218

-4.7% QoQ

Ownership

14.0%

of shares outstanding

% of Portfolio

0.00%

of 13F equity value

Holder Rank

of 187 holders

Holding Since

Mar 2020

26 quarters on record

Voting authority Sole 100% Shared 0% None 0%

Common Shares in PRTA Over Time

Shares Held

Position Value (USD)

Position in Biotechnology

Healthcare · as of Jun 30, 2026

FMR LLC holds $61,424,667,385 across 370 Biotechnology names. PRTA ranks #108 (0.1% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	ARGX	Argenx SE	5,231,452	$4,853,584,218
2	ALNY	Alnylam Pharmaceuticals, Inc.	15,023,962	$4,522,663,276
3	MRNA	Moderna, Inc.	51,859,891	$3,631,748,165
4	ROIV	Roivant Sciences Ltd.	81,020,390	$2,867,311,601
5	RVMD	Revolution Medicines, Inc.	12,200,422	$2,284,895,029
6	IONS	Ionis Pharmaceuticals Inc	24,631,956	$1,953,067,789
7	INSM	INSMED Inc	16,143,583	$1,721,228,815
8	KRYS	Krystal Biotech, Inc.	4,418,197	$1,642,111,277

All Filings in PRTA

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27 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-06-30	$70,480,344	7,199,218	—	Shares	Sole	2026-08-06
2026-06-30	$70,480,343	7,199,218	-4.7%	Shares	Defined	2026-08-13
2026-03-31	$73,397,838	7,551,218	0.0%	Shares	Defined	2026-05-15
2025-12-31	$72,114,131	7,551,218	-4.4%	Shares	Defined	2026-02-17
2025-09-30	$77,115,887	7,901,218	0.0%	Shares	Defined	2025-11-13
2025-06-30	$47,960,393	7,901,218	-0.5%	Shares	Defined	2025-08-14
2025-03-31	$98,274,849	7,941,402	-1.6%	Shares	Defined	2025-05-12
2024-12-31	$111,787,627	8,071,309	+0.1%	Shares	Defined	2025-02-13
2024-09-30	$134,960,625	8,066,983	+0.0%	Shares	Defined	2024-11-13
2024-06-30	$166,475,572	8,065,677	+0.7%	Shares	Defined	2024-08-13
2024-03-31	$198,318,799	8,006,411	-0.5%	Shares	Defined	2024-05-13
2023-12-31	$292,529,585	8,049,796	+0.2%	Shares	Defined	2024-02-13
2023-09-30	$387,461,491	8,030,290	+1.5%	Shares	Defined	2023-11-13
2023-06-30	$540,283,660	7,912,766	+17.0%	Shares	Defined	2023-08-11
2023-03-31	$327,755,351	6,762,025	+71.3%	Shares	Defined	2023-08-11
2022-12-31	$237,823,137	3,947,272	+24.8%	Shares	Defined	2023-02-13
2022-09-30	$191,737,401	3,162,418	+8.1%	Shares	Defined	2022-11-10
2022-06-30	$79,424,554	2,925,398	+9.3%	Shares	Defined	2022-08-12
2022-03-31	$97,847,202	2,675,614	+1.3%	Shares	Defined	2022-05-13
2021-12-31	$130,502,004	2,641,741	-0.3%	Shares	Defined	2022-02-14
2021-09-30	$188,718,968	2,649,431	-4.6%	Shares	Defined	2022-02-14
2021-06-30	$142,831,734	2,778,287	-10.8%	Shares	Defined	2021-08-13
2021-03-31	$78,278,843	3,116,196	+110.2%	Shares	Defined	2021-05-14
2020-12-31	$17,803,155	1,482,361	-25.8%	Shares	Defined	2021-02-08
2020-09-30	$19,968,710	1,998,870	+2.1%	Shares	Defined	2020-11-13
2020-06-30	$20,478,054	1,957,749	-37.5%	Shares	Defined	2020-08-24
2020-03-31	$33,525,806	3,133,253	—	Shares	Defined	2020-05-14
No filing history on record for this holder in this stock.