ALNYAlnylam Pharmaceuticals, Inc.

$239.03

Who owns ALNY

766 institutions reported holding ALNY for 2026Q1, together 97% of the company, fewer than the 834 a quarter earlier.

766

Institutions reporting a position · as of 2026Q1 · down from 834 the quarter before

Shares held by institutions
128.0M

Shares held by institutions · 97% of the company · long US equity positions only, as reported on Form 13F

Reported value
$42.2B

Reported value · at 2026-03-31 prices, not today's

Top 5 holders
45%

Top 5 holders · of the whole company, between five filers

Details
Reporting quarter2026-03-31
2026Q1
Quarters on record
52
New positions
93
Positions exited
165
Added to
292
Reduced
240
Top 10 holdersof the company
60%
Institutional ownership by quarter, 2013Q2 to 2026Q1
QuarterFilersSharesReported value
2026Q1766128.0M$42.2B
2025Q4834129.6M$51.7B
2025Q3806129.5M$59.0B
2025Q2641131.7M$42.9B
2025Q1613129.1M$34.7B
2024Q4585127.6M$30.0B
2024Q3557123.8M$34.0B
2024Q2513119.6M$29.1B
2024Q1490114.7M$17.2B
2023Q4492117.0M$22.4B
2023Q3445117.5M$20.8B
2023Q2468118.3M$22.5B
2023Q1470119.5M$23.9B
2022Q4483119.0M$28.3B
2022Q3491132.8M$26.6B
2022Q2414113.0M$16.5B
Largest reported holders, 2026Q1
HolderShares% of companyValue
FMR LLC14.6M11%$4.82B
VANGUARD GROUP INC13.6M10%$4.51B
Capital World Investors10.8M8.2%$3.57B
BlackRock Inc.10.4M7.9%$3.46B
Capital Research Global Investors9.5M7.2%$3.13B
JPMORGAN CHASE & CO6.3M4.8%$2.00B
T. Rowe Price Investment Management, Inc.5.2M3.9%$1.72B
STATE STREET CORP3.3M2.5%$1.10B
GEODE CAPITAL MANAGEMENT LLC2.7M2.0%$885M
BAILLIE GIFFORD & CO2.5M1.9%$825M

SEC Form 13F data sets (DERA bulk files). 13F is quarterly, filed up to 45 days late, and covers long US equity positions only, no shorts, no derivatives, nothing held below the reporting threshold.

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