How many shares of ALNY does Capital World Investors own?

As of 2026-Q2, Capital World Investors holds 11.1M shares of ALNY (ALNYLAM PHARMACEUTICALS INC).

What is Capital World Investors's ALNY position worth?

As of 2026-Q2, Capital World Investors's ALNY position is worth $3.4B.

In 2026-Q2, Capital World Investors increased their ALNY position (+3.2% change in shares).

Based on available 13F filings, Capital World Investors first reported a position in ALNY in 2019-Q2. They have held the position across 29 quarters.

Position history for Capital World Investors's holdings in ALNYLAM PHARMACEUTICALS INC

Current Value

$3.4B

Current Shares

11.1M

Total Value Change

+$3.3B

Total Shares Change

+11M

Quarter-by-Quarter History

Quarter	Action	Shares	Change	Value	Weight	Price	Conviction
2026-Q2 Latest	Increased	11.1M	+3.2%	$3.4B	0.4%	$301.03	39
2026-Q1	Decreased	10.8M	-33.7%	$3.6B	0.5%	$318.65	0
2025-Q4	Decreased	16.3M	-0.8%	$6.5B	0.9%	$397.25	0
2025-Q3	Decreased	16.4M	-2.2%	$7.5B	1.0%	$447.49	0
2025-Q2	Increased	16.8M	+0.3%	$5.5B	0.8%	$322.83	45
2025-Q1	Increased	16.7M	+0.9%	$4.5B	0.7%	$268.46	45
2024-Q4	Increased	16.6M	+0.6%	$3.9B	0.6%	$236.01	45
2024-Q3	Increased	16.5M	+10.3%	$4.5B	0.7%	$274.91	50
2024-Q2	Increased	15M	+17.1%	$3.6B	0.6%	$243.00	52
2024-Q1	Decreased	12.8M	-20.9%	$1.9B	0.3%	$149.45	0
2023-Q4	Decreased	16.2M	-2.1%	$3.1B	0.6%	$191.41	0
2023-Q3	Increased	16.5M	+0.2%	$2.9B	0.6%	$177.10	45
2023-Q2	Increased	16.5M	+0.1%	$3.1B	0.6%	$191.06	45
2023-Q1	Increased	16.5M	+0.5%	$3.3B	0.7%	$195.12	45
2022-Q4	Increased	16.4M	+17.5%	$3.9B	0.8%	$237.65	53
2022-Q3	Increased	13.9M	+35.5%	$2.8B	0.6%	$209.39	58
2022-Q2	Increased	10.3M	+71.5%	$1.5B	0.3%	$145.43	57
2022-Q1	Increased	6M	+1781.1%	$979.7M	0.2%	$165.24	62
2021-Q4	Unchanged	318,946	0.0%	$54.1M	0.0%	$171.03	0
2021-Q3	Unchanged	318,946	0.0%	$60.2M	0.0%	$177.45	0
2021-Q2	Decreased	318,946	-9.5%	$54.1M	0.0%	$165.87	0
2021-Q1	Unchanged	352,546	0.0%	$49.8M	0.0%	$135.13	0
2020-Q4	Unchanged	352,546	0.0%	$45.8M	0.0%	$131.04	0
2020-Q3	Unchanged	352,546	0.0%	$51.3M	0.0%	$145.01	0
2020-Q2	Unchanged	352,546	0.0%	$52.2M	0.0%	$147.91	0
2020-Q1	Increased	352,546	+156.0%	$38.4M	0.0%	$108.83	47
2019-Q4	Unchanged	137,700	0.0%	$15.9M	0.0%	$114.69	0
2019-Q3	Unchanged	137,700	0.0%	$11.1M	0.0%	$81.10	0
2019-Q2	New	137,700	-	$10M	0.0%	$72.56	38