Capital World Investors Alnylam Pharmaceuticals, Inc. Transaction History

Capital World Investors

$700 Billion
Q3 2025

A detailed history of Capital World Investors transactions in Alnylam Pharmaceuticals, Inc. stock. As of the latest transaction made, Capital World Investors holds 16,434,253 shares of ALNY stock, worth $7.38 Billion. This represents 1.07% of its overall portfolio holdings.

Number of Shares

16,434,253

Previous 16,805,007 2.21%

Holding current value

$7.38 Billion

Previous $5.48 Billion 36.75%

% of portfolio

1.07%

Previous 0.83%

18 transactions

Quarter	Operation	Price Per share	shares change	shares Held
Q3 2025 Nov 13, 2025	SELL	$311.12 - $482.13 $115 Million - $179 Million	-370,754 Reduced 2.21%	16,434,253 $7.49 Billion
Q2 2025 Aug 13, 2025	BUY	$224.32 - $326.09 $12.4 Million - $18.1 Million	55,384 Added 0.33%	16,805,007 $5.48 Billion
Q1 2025 May 12, 2025	BUY	$233.07 - $290.7 $34.8 Million - $43.3 Million	149,098 Added 0.9%	16,749,623 $4.52 Billion
Q4 2024 Feb 13, 2025	BUY	$232.27 - $300.43 $21.4 Million - $27.7 Million	92,101 Added 0.56%	16,600,525 $3.91 Billion
Q3 2024 Nov 13, 2024	BUY	$233.81 - $287.01 $359 Million - $441 Million	1,537,081 Added 10.27%	16,508,424 $4.54 Billion

Q2 2024 Aug 13, 2024	BUY	$143.31 - $247.0 $313 Million - $539 Million	2,182,107 Added 17.06%	14,971,343 $3.64 Billion
Q1 2024 May 14, 2024	SELL	$146.51 - $198.2 $496 Million - $671 Million	-3,385,327 Reduced 20.93%	12,789,236 $1.91 Billion
Q4 2023 Feb 13, 2024	SELL	$151.41 - $196.57 $53.7 Million - $69.7 Million	-354,745 Reduced 2.15%	16,174,563 $3.1 Billion
Q3 2023 Nov 13, 2023	BUY	$170.77 - $211.65 $5.42 Million - $6.72 Million	31,757 Added 0.19%	16,529,308 $2.93 Billion
Q2 2023 Aug 11, 2023	BUY	$185.01 - $212.05 $3.95 Million - $4.53 Million	21,350 Added 0.13%	16,497,551 $3.13 Billion
Q1 2023 May 15, 2023	BUY	$182.66 - $235.53 $15.7 Million - $20.2 Million	85,926 Added 0.52%	16,476,201 $3.3 Billion
Q4 2022 Feb 14, 2023	BUY	$185.53 - $241.31 $453 Million - $589 Million	2,440,628 Added 17.5%	16,390,275 $3.9 Billion
Q3 2022 Nov 14, 2022	BUY	$138.54 - $232.0 $507 Million - $849 Million	3,658,635 Added 35.55%	13,949,647 $2.79 Billion
Q2 2022 Aug 15, 2022	BUY	$120.42 - $169.29 $517 Million - $726 Million	4,291,338 Added 71.53%	10,291,012 $1.5 Billion
Q1 2022 May 16, 2022	BUY	$127.18 - $173.91 $722 Million - $988 Million	5,680,728 Added 1781.09%	5,999,674 $980 Million
Q2 2021 Aug 16, 2021	SELL	$128.63 - $176.89 $4.32 Million - $5.94 Million	-33,600 Reduced 9.53%	318,946 $54.1 Million
Q1 2020 May 15, 2020	BUY	$93.12 - $133.99 $20 Million - $28.8 Million	214,846 Added 156.02%	352,546 $38.4 Million
Q3 2017 Nov 14, 2017	BUY	$72.53 - $118.27 $9.99 Million - $16.3 Million	137,700	137,700 $16.2 Million

Others Institutions Holding ALNY

# of Institutions

917

Shares Held

117M

Call Options Held

1.26M

Put Options Held

1.49M

View Full List

About ALNYLAM PHARMACEUTICALS, INC.

Ticker ALNY
Exchange NASDAQ
Sector Healthcare
Industry Biotechnology
Shares Outstandng 123,028,000
Market Cap $55.3B
Description
Alnylam Pharmaceuticals, Inc., a biopharmaceutical company, focuses on discovering, developing, and commercializing novel therapeutics based on ribonucleic acid interference. The company's pipeline of investigational RNAi therapeutics focuses on genetic medicines, cardio-metabolic diseases, hepatic infectious diseases, and central nervous system...

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Capital World Investors Alnylam Pharmaceuticals, Inc. Transaction History