AMERICAN CENTURY COMPANIES INC

Position in ALNY — Alnylam Pharmaceuticals, Inc.

CIK 748054 KANSAS CITY, MO

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Position in ALNY

as of Jun 30, 2026 · filed Aug 12, 2026 Compact

Position Value

$558,096,374

-$38,251,471 QoQ

Shares Held

1,853,956

+2.9% QoQ

Ownership

1.39%

of shares outstanding

% of Portfolio

0.25%

of 13F equity value

Holder Rank

#18

of 784 holders

Holding Since

Mar 2020

26 quarters on record

Voting authority Sole 93% Shared 7% None 0%

Common Shares in ALNY Over Time

Shares Held

Position Value (USD)

Position in Biotechnology

Healthcare · as of Jun 30, 2026

AMERICAN CENTURY COMPANIES INC holds $3,568,637,643 across 178 Biotechnology names. ALNY ranks #1 (15.6% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	ALNY	Alnylam Pharmaceuticals, Inc. This page	1,853,956	$558,096,374
2	ASND	Ascendis Pharma A/S	1,400,575	$373,561,364
3	VRTX	Vertex Pharmaceuticals Inc / Ma	580,901	$288,550,953
4	ARGX	Argenx SE	173,193	$160,683,269
5	IONS	Ionis Pharmaceuticals Inc	1,947,076	$154,383,656
6	EXEL	Exelixis, Inc.	1,791,664	$97,484,438
7	HRMY	Harmony Biosciences Holdings, Inc.	2,539,512	$92,463,631
8	GPCR	Structure Therapeutics Inc.	1,682,179	$90,282,546

All Filings in ALNY

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26 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-06-30	$558,096,374	1,853,956	+2.9%	Shares	Defined	2026-08-12
2026-03-31	$596,347,845	1,802,363	+21.4%	Shares	Defined	2026-05-15
2025-12-31	$590,574,271	1,485,161	-9.5%	Shares	Defined	2026-02-13
2025-09-30	$748,497,096	1,641,441	-8.5%	Shares	Defined	2025-11-12
2025-06-30	$584,955,242	1,793,846	+1.9%	Shares	Defined	2025-08-12
2025-03-31	$475,352,658	1,760,435	+9.8%	Shares	Defined	2025-05-13
2024-12-31	$377,442,887	1,604,024	+0.7%	Shares	Defined	2025-02-11
2024-09-30	$438,049,356	1,592,733	+17.6%	Shares	Defined	2024-11-12
2024-06-30	$329,063,067	1,354,169	-1.4%	Shares	Defined	2024-08-07
2024-03-31	$205,292,590	1,373,654	+231.0%	Shares	Defined	2024-05-14
2023-12-31	$79,424,431	414,944	-6.3%	Shares	Defined	2024-02-13
2023-09-30	$78,409,785	442,743	+0.9%	Shares	Defined	2023-11-13
2023-06-30	$83,359,157	438,871	-1.3%	Shares	Defined	2023-08-14
2023-03-31	$89,063,874	444,608	-36.5%	Shares	Defined	2023-05-11
2022-12-31	$166,306,281	699,795	+1.0%	Shares	Defined	2023-02-13
2022-09-30	$138,712,281	693,007	+20.5%	Shares	Defined	2022-11-14
2022-06-30	$83,855,144	574,941	-49.2%	Shares	Defined	2022-08-12
2022-03-31	$184,818,806	1,131,844	+12.9%	Shares	Defined	2022-05-11
2021-12-31	$170,016,498	1,002,574	-6.4%	Shares	Defined	2022-02-07
2021-09-30	$202,304,439	1,071,471	+2.4%	Shares	Defined	2021-11-10
2021-06-30	$177,350,128	1,046,190	-4.4%	Shares	Defined	2021-08-05
2021-03-31	$154,535,419	1,094,521	+1.4%	Shares	Defined	2021-05-14
2020-12-31	$140,283,119	1,079,350	+9.1%	Shares	Defined	2021-02-12
2020-09-30	$144,043,827	989,312	-0.8%	Shares	Defined	2020-11-13
2020-06-30	$147,693,218	997,186	+145.2%	Shares	Defined	2020-08-13
2020-03-31	$44,261,457	406,628	—	Shares	Defined	2020-05-14
No filing history on record for this holder in this stock.