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ALNY — ALNYLAM PHARMACEUTICALS INC

Reported value held$15.25B
Funds holding (latest)60
SectorHealth Care

Index member: Invesco QQQ Trust

Funds holding (Q2 2026)47
Institutional value$9.60B · 113.14M sh
New / Add / Cut / Exit3 / 19 / 19 / 2
Top-5 / Top-10 concentration60.2% / 82.7%
Institutional holdings change Reducing -10.0% (-12.56M sh)
Institutional value change Down -25.2%

As of Q2 2026, 47 SEC-registered investment managers reported holding ALNY (ALNYLAM PHARMACEUTICALS INC) in their latest 13F filings, with a combined reported value of $9.60B across 113.14M shares. That is -10.0% by share count (-12.56M shares) versus the previous quarter, while reported value moved -25.2%. Ownership is concentrated: the five largest holders account for 60.2% of reported value and the top ten for 82.7%.

Compared with the prior quarter, 3 opened new positions, 19 added to existing stakes, 19 trimmed, 2 exited entirely. 13F holdings are quarter-end snapshots, so these moves reflect positioning as of Q2 2026, not real-time trading.

ALNY is a constituent of the Invesco QQQ Trust and is classified in the Health Care sector.

All figures on this page are computed from SEC Form 13F quarterly filings. 13F filers disclose long positions of $100,000 or more within 45 days of quarter end; short positions, options overlays and intra-quarter trades are not included, so treat the numbers as a quarterly snapshot of institutional ownership rather than real-time positioning.

FundQuarterSharesValuePortfolio WeightChange
Vanguard Group history Q4 2025 13.55M $5.39B 0.08% Hold
Capital Research Global Investors history Q2 2026 9.75M $2.94B 0.43% Add
Geode Capital Management history Q2 2026 2.64M $791.35M 0.04% Reduce
Baillie Gifford & Co history Q2 2026 2.44M $734.48M 0.67% Reduce
Norges Bank Investment Management history Q2 2026 2.27M $683.88M 0.07% Add
Wellington Management Group history Q2 2026 2.11M $635.30M 0.12% Add
Dodge & Cox history Q2 2026 1.96M $588.63M 0.31% Add
Two Sigma Investments history Q2 2026 1.88M $564.71M 0.44% Reduce
D. E. Shaw & Co history Q2 2026 1.53M $461.90M 0.24% Add
Legal & General Investment Management America history Q2 2026 924.56K $278.32M 0.06% Reduce
Northern Trust Corp history Q2 2026 886.90K $266.98M 0.03% Add
Deutsche Bank AG history Q2 2026 825.80K $248.59M 0.08% Add
Charles Schwab Investment Management history Q2 2026 755.38K $227.39M 0.03% Add
AQR Capital Management history Q2 2026 728.04K $218.99M 0.08% Reduce
BNY Mellon history Q2 2026 707.07K $148.39M 0.03% Hold
Millennium Management history Q2 2026 379.20K $114.15M 0.04% Reduce
MFS Investment Management history Q2 2026 350.56K $105.52M 0.04% Reduce
CPP Investments history Q2 2026 334.25K $100.62M 0.06% Add
Citadel Advisors history Q2 2026 315.13K $94.86M 0.01% Add
Davidson Kempner Capital Management history Q2 2025 65.00M $84.44M 1.58% Add

View all 60 fund holders →

New Positions (Q2 2026)

Fully Exited (vs previous quarter)

Fund Position History — shares by quarter (top 20 funds)

FundQ3 2021Q4 2021Q1 2022Q2 2022Q3 2022Q4 2022Q1 2023Q2 2023Q3 2023Q4 2023Q1 2024Q2 2024Q3 2024Q4 2024Q1 2025Q2 2025Q3 2025Q4 2025Q1 2026Q2 2026
Capital Research Global Investors — — — — — 832.12K 2.44M 2.35M 2.78M 2.93M 3.14M 3.26M 5.24M 6.97M 7.15M 7.19M 7.22M 6.78M 9.47M 9.75M
Geode Capital Management 1.45M 1.51M 1.57M 1.57M 1.60M 1.69M 1.74M 1.80M 1.84M 1.93M 2.00M 2.08M 2.15M 2.21M 2.32M 2.40M 2.50M 2.65M 2.66M 2.64M
Baillie Gifford & Co 10.42M 10.62M 10.14M 9.97M 9.51M 9.41M 8.64M 8.39M 8.16M 6.97M 6.62M 6.03M 4.89M 4.04M 3.66M 3.03M 2.79M 2.60M 2.49M 2.44M
Norges Bank Investment Management — — — — — 1.01M — — — 2.04M — 2.30M — 2.46M — 2.03M — 2.25M — 2.27M
Wellington Management Group 7.37M 6.84M 7.03M 5.81M 5.95M 6.23M 6.15M 6.07M 6.43M 11.08M 21.90M 19.60M 18.73M 19.07M 15.72M 18.21M 2.50M 1.63M 1.94M 2.11M
Dodge & Cox 5.37M 5.43M 5.48M 5.26M 4.89M 4.59M 3.89M 3.79M 3.75M 3.67M 3.81M 3.78M 3.62M 3.54M 3.35M 3.20M 2.32M 1.96M 1.93M 1.96M
Two Sigma Investments — — 73.95K — 216.71K 182.71K 167.35K 224.67K 3.30K — 102.51K 102.92K 19.15K 107.12K 197.41K 343.31K 595.93K 616.12K 6.00M 1.88M
D. E. Shaw & Co 45.06K 101.34K 69.88K 200.92K 216.14K 254.82K 274.75K 291.67K 260.69K 167.14K 23.82M 35.65M 360.50K 391.29K 291.46K 109.88K 232.22K 843.49K 1.47M 1.53M
Legal & General Investment Management America 666.78K 679.57K 757.42K 778.95K 754.49K 732.36K 731.02K 798.39K 794.67K 930.94K 921.20K 926.33K 960.96K 828.92K 881.11K 872.77K 887.78K 961.50K 934.88K 924.56K
Northern Trust Corp 779.12K 769.41K 763.34K 736.94K 733.99K 749.54K 761.58K 772.47K 797.70K 764.52K 739.58K 780.84K 734.92K 878.86K 865.02K 831.78K 833.15K 857.74K 858.12K 886.90K
Deutsche Bank AG 282.16K 274.65K 282.11K 247.25K 253.68K 465.05K 459.62K 486.88K 462.86K 480.12K 524.08K 548.02K 539.27K 1.66M 1.66M 1.66M 614.52K 722.38K 771.86K 825.80K
Charles Schwab Investment Management 352.81K 362.96K 372.62K 376.30K 378.87K 400.58K 405.36K 416.14K 418.98K 438.30K 447.56K 470.59K 487.35K 513.96K 554.61K 571.75K 618.77K 647.84K 673.36K 755.38K
AQR Capital Management — 2.12K 11.25K 6.01K 11.77K — 6.11K 5.73K 9.46K 14.02K 141.14K 271.62K 505.65K 813.36K 828.34K 188.25K 744.01K 919.96K 913.10K 728.04K
BNY Mellon 453.25K 602.31K 638.87K 675.15K 567.14K 574.38K 554.34K 775.60K 1.44M 1.44M 1.40M 1.27M 1.07M 979.20K 1.47M 2.13M 1.27M 504.13K 706.20K 707.07K
Millennium Management 76.83K 143.92K 63.96K 55.25K 172.77K 17.90K 23.37K 185.38K 49.11K 42.64K 209.08K 138.50K 20.00M 348.14K 356.24K 20.00M 587.33K 86.43K 493.09K 379.20K
MFS Investment Management 1.37M 1.32M — 344.29K 535.60K 755.54K 765.77K 672.40K 688.23K 112.24K — — — — — — 356.53K 495.31K 496.00K 350.56K
CPP Investments 91.29K 56.14K 1.01K 490 71.18K 62.12K 169.20K 167.50K 151.30K 243.00K 273.79K 283.93K 344.86K 174.02K 60.53K 35.52K 136.33K 258.71K 208.94K 334.25K
Citadel Advisors 161.08K 286.77K 184.61K 548.69K 384.87K 286.44K 365.24K 229.66K 204.20K 12.42M 34.28M 27.71M 312.73K 227.09K 8.00M 5.00M 341.04K 186.26K 111.22K 315.13K
Marshall Wace 16.43K — — 165.29K — — — 11.09K — 1.30K — — 63.47K 378.65K 268.93K 238.57K 508.37K 549.92K 1.10M 259.80K
National Pension Service of Korea 181.10K 175.79K 180.90K 180.90K 156.99K 156.23K 156.23K 171.99K 167.77K 167.77K 186.18K 196.39K 196.39K 159.51K 173.66K 175.05K 177.24K 168.15K 183.79K 198.29K

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