Alnylam Pharmaceuticals, Inc.
ALNY- Exchange
- Nasdaq
- Industry
- Pharmaceutical Preparations
- SEC CIK
- 0001178670
No open-market purchases or sales by Alnylam Pharmaceuticals, Inc. insiders were filed in the last 90 days; 794 institutions reported holding it in 13F filings for Q2 2026, worth $40.1B in total; no superinvestor holds it.
13F holders, Q1 2026
Institutional positions in Alnylam Pharmaceuticals, Inc. as of Mar 31, 2026. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works
- Institutional holders
- 793
- −48 vs. Q4 2025
- Shares held
- 131.4M
- +14.7M (+12.6%) vs. Q4 2025
- Total value
- $43.4B
- −$2.95B (−6.4%) vs. Q4 2025
- New holders
- 106
- 323 more added
- Sold out
- 154
- 258 more reduced
11 institutions that held it in Q4 2025 haven't filed for Q1 2026 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q4 2025: new holders, sold out and not filed yet
Holders and value by quarter
Institutions reporting ALNY on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.
| Quarter | Holders | Value |
|---|---|---|
| Q2 2026 | 794 | $40.1B |
| Q1 2026 | 793 | $43.4B |
| Q4 2025 | 852 | $52.7B |
| Q3 2025 | 823 | $59.2B |
| Q2 2025 | 653 | $43.1B |
| Q1 2025 | 625 | $34.8B |
| Q4 2024 | 594 | $30.1B |
| Q3 2024 | 569 | $34.1B |
| Q2 2024 | 525 | $29.1B |
| Q1 2024 | 499 | $17.2B |
| Q4 2023 | 501 | $22.4B |
| Q3 2023 | 454 | $20.9B |
| Q2 2023 | 477 | $22.5B |
| Q1 2023 | 478 | $24.0B |
| Q4 2022 | 489 | $28.4B |
| Q3 2022 | 497 | $26.7B |
| Q2 2022 | 424 | $16.6B |
| Q1 2022 | 443 | $18.6B |
| Q4 2021 | 435 | $19.0B |
| Q3 2021 | 407 | $21.1B |
| Q2 2021 | 401 | $19.0B |
| Q1 2021 | 391 | $15.4B |
Institutions, Q1 2026
Shares, value and share of portfolio for each institution holding Alnylam Pharmaceuticals, Inc.; share changes are against Q4 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| B. Metzler seel. Sohn & Co. AG | 8,475 | $2.80M | 0.03% | +3,223+61.4% | Added |
| Employees Retirement System of Texas | 8,403 | $2.78M | 0.02% | −1,389−14.2% | Reduced |
| Kestra Investment Management, LLC | 8,396 | $2.78M | 0.05% | +2,382+39.6% | Added |
| M&T Bank Corp | 8,237 | $2.73M | 0.01% | +271+3.4% | Added |
| Wealth Enhancement Advisory Services, LLC | 8,478 | $2.70M | 0.01% | −5,609−39.8% | Reduced |
| Zacks Investment Management | 7,857 | $2.60M | 0.02% | −4,151−34.6% | Reduced |
| St Germain D J Co Inc | 7,852 | $2.60M | 0.10% | −5−0.1% | Reduced |
| MetLife Investment Management | 7,800 | $2.58M | 0.01% | −387−4.7% | Reduced |
| Bank of Nova Scotia | 7,798 | $2.58M | 0.00% | +49+0.6% | Added |
| AIA Group Ltd | 7,742 | $2.56M | 0.04% | −12,435−61.6% | Reduced |
| Truist Financial Corp | 7,701 | $2.55M | 0.00% | +1,596+26.1% | Added |
| Prudential PLC | 7,696 | $2.55M | 0.02% | −133−1.7% | Reduced |
| Virtus Investment Advisers, Inc. | 7,471 | $2.47M | 0.68% | +5,754+335.1% | Added |
| S&CO Inc | 7,400 | $2.45M | 0.15% | −800−9.8% | Reduced |
| US Bancorp | 7,381 | $2.44M | 0.00% | +2,145+41.0% | Added |
| J.P. Marvel Investment Advisors, LLC | 7,105 | $2.35M | 0.33% | 00.0% | Unchanged |
| Pathstone Holdings, LLC | 7,072 | $2.34M | 0.01% | +933+15.2% | Added |
| Osmosis Investment Management UK Ltd | 7,013 | $2.32M | 0.06% | −694−9.0% | Reduced |
| PKO Investment Management Joint-Stock Co | 6,800 | $2.25M | 0.19% | 00.0% | Unchanged |
| Legato Capital Management LLC | 6,514 | $2.16M | 0.20% | +6,514 | New |
| Capital Group Investment Management Pte. Ltd. | 6,474 | $2.14M | 0.37% | −8,372−56.4% | Reduced |
| Vident Advisory, LLC | 6,457 | $2.14M | 0.02% | +1,302+25.3% | Added |
| Rockefeller Capital Management L.P. | 6,437 | $2.13M | 0.00% | −1,687−20.8% | Reduced |
| Maryland State Retirement & Pension System | 6,346 | $2.10M | 0.04% | 00.0% | Unchanged |
| Allstate Corp | 6,335 | $2.10M | 0.02% | −3,494−35.5% | Reduced |
| Advisory Services Network, LLC | 6,314 | $2.09M | 0.03% | −1,779−22.0% | Reduced |
| Plato Investment Management Ltd | 6,249 | $2.07M | 0.14% | −5−0.1% | Reduced |
| AG2R la Mondiale Gestion D'Actifs | 6,205 | $2.05M | 0.09% | +610+10.9% | Added |
| E Fund Management Co., Ltd. | 6,074 | $2.01M | 0.06% | +6,074 | New |
| Fisher Asset Management, LLC | 6,045 | $2.00M | 0.00% | +6,045 | New |
| Banque Cantonale Vaudoise | 5,978 | $1.98M | 0.07% | −5,059−45.8% | Reduced |
| Dai-Ichi Life Insurance Company, Ltd | 5,930 | $1.96M | 0.06% | −325−5.2% | Reduced |
| Jane Street Group, LLC | 5,902 | $1.95M | 0.00% | −305,386−98.1% | Reduced |
| Sanctuary Advisors, LLC | 5,839 | $1.93M | 0.01% | −681−10.4% | Reduced |
| Edgestream Partners, L.P. | 5,810 | $1.92M | 0.06% | −1,438−19.8% | Reduced |
| Abn Amro Investment Solutions | 5,767 | $1.91M | 0.02% | +8+0.1% | Added |
| Walleye Trading LLC | 5,756 | $1.90M | 0.04% | −2,901−33.5% | Reduced |
| Brighton Jones LLC | 5,699 | $1.89M | 0.04% | +5,699 | New |
| BI Asset Management Fondsmaeglerselskab A/S | 5,697 | $1.89M | 0.02% | −9,172−61.7% | Reduced |
| Principal Financial Group Inc | 5,649 | $1.87M | 0.00% | +2,151+61.5% | Added |
| Group One Trading, L.P. | 5,545 | $1.83M | 0.06% | +5,545 | New |
| Vontobel Holding Ltd. | 5,476 | $1.81M | 0.01% | +3,157+136.1% | Added |
| Aware Super Pty Ltd as trustee of Aware Super | 5,473 | $1.81M | 0.03% | +5,473 | New |
| Empowered Funds, LLC | 5,410 | $1.79M | 0.01% | −14,021−72.2% | Reduced |
| Integrated Wealth Concepts LLC | 5,374 | $1.78M | 0.01% | +1,134+26.7% | Added |
| Vestcor Inc | 5,319 | $1.76M | 0.05% | +1,786+50.6% | Added |
| Tokio Marine Asset Management Co Ltd | 5,280 | $1.75M | 0.06% | +265+5.3% | Added |
| Fieldview Capital Management, LLC | 5,275 | $1.75M | 0.51% | +5,275 | New |
| Sterling Capital Management LLC | 5,182 | $1.71M | 0.03% | +1,625+45.7% | Added |
| Ishara Investments LP | 5,125 | $1.70M | 1.71% | +5,125 | New |
| Susquehanna Portfolio Strategies, LLC | 5,005 | $1.66M | 0.02% | 00.0% | Unchanged |
| Norinchukin Bank, The | 4,959 | $1.64M | 0.02% | +472+10.5% | Added |
| Saudi Central Bank | 4,876 | $1.61M | 0.03% | +4,876 | New |
| AustralianSuper Pty Ltd | 4,803 | $1.59M | 0.01% | 00.0% | Unchanged |
| Colony Group, LLC | 4,802 | $1.59M | 0.00% | −2,281−32.2% | Reduced |
| Ameritas Investment Partners, Inc. | 4,776 | $1.58M | 0.05% | 00.0% | Unchanged |
| Envestnet Portfolio Solutions, Inc. | 4,758 | $1.57M | 0.01% | +413+9.5% | Added |
| Brinker Capital Investments, LLC | 4,713 | $1.56M | 0.01% | +308+7.0% | Added |
| Strategic Global Advisors, LLC | 4,673 | $1.55M | 0.25% | +4,673 | New |
| Brevan Howard Capital Management LP | 4,621 | $1.53M | 0.02% | +184+4.1% | Added |
| Azzad Asset Management Inc | 4,591 | $1.52M | 0.15% | 00.0% | Unchanged |
| E. Ohman J:or Asset Management AB | 4,584 | $1.52M | 0.04% | 00.0% | Unchanged |
| Sequoia Financial Advisors, LLC | 4,560 | $1.51M | 0.01% | +348+8.3% | Added |
| Omers Administration Corp | 4,517 | $1.49M | 0.01% | 00.0% | Unchanged |
| Pacer Advisors, Inc. | 4,478 | $1.48M | 0.00% | −5,110−53.3% | Reduced |
| FORA Capital, LLC | 4,471 | $1.48M | 0.11% | +1,005+29.0% | Added |
| Laurion Capital Management LP | 4,431 | $1.47M | 0.14% | +4,431 | New |
| Howland Capital Management LLC | 4,234 | $1.40M | 0.06% | −9−0.2% | Reduced |
| United Capital Financial Advisers, LLC | 4,088 | $1.35M | 0.01% | +1,639+66.9% | Added |
| Metis Global Partners, LLC | 4,049 | $1.34M | 0.03% | −136−3.2% | Reduced |
| North Dakota State Investment Board | 4,044 | $1.34M | 0.06% | −745−15.6% | Reduced |
| Ambassador Advisors, LLC | 3,961 | $1.31M | 0.20% | +187+5.0% | Added |
| Gilbert & Cook, Inc. | 3,960 | $1.31M | 0.17% | −58−1.4% | Reduced |
| Advisors Asset Management, Inc. | 3,952 | $1.31M | 0.02% | −351−8.2% | Reduced |
| Atlantic Trust, LLC | 3,938 | $1.30M | 0.21% | −28−0.7% | Reduced |
| Ethic Inc. | 3,869 | $1.28M | 0.02% | +651+20.2% | Added |
| Quantitative Investment Management, LLC | 3,857 | $1.28M | 0.13% | −474−10.9% | Reduced |
| New York Life Investment Management LLC | 3,778 | $1.25M | 0.01% | +2,033+116.5% | Added |
| Draper Asset Management, LLC | 3,773 | $1.25M | 0.71% | +1,351+55.8% | Added |
| Zions Bancorporation, National Association | 3,640 | $1.20M | 0.08% | +3,493+2,376.2% | Added |
| Ci Investments Inc. | 3,611 | $1.19M | 0.01% | −2,441−40.3% | Reduced |
| SummitTX Capital, L.P. | 3,611 | $1.19M | 0.04% | +146+4.2% | Added |
| Summit Trail Advisors, LLC | 3,598 | $1.19M | 0.02% | +84+2.4% | Added |
| Laird Norton Trust Company, LLC | 3,507 | $1.16M | 0.03% | +6+0.2% | Added |
| Kennedy Capital Management, Inc. | 3,503 | $1.16M | 0.02% | +288+9.0% | Added |
| DZ BANK AG Deutsche Zentral Genossenschafts Bank, Frankfurt am Main | 3,500 | $1.16M | 0.00% | 00.0% | Unchanged |
| Burney Co | 3,411 | $1.13M | 0.04% | −1,171−25.6% | Reduced |
| Spectrum Planning & Advisory Services Inc. | 3,350 | $1.11M | 0.55% | 00.0% | Unchanged |
| Lombard Odier Asset Management (Switzerland) SA | 3,320 | $1.10M | 0.04% | +3,320 | New |
| Kentucky Retirement Systems Insurance Trust Fund | 3,285 | $1.09M | 0.07% | 00.0% | Unchanged |
| Sumitomo Life Insurance Co | 3,284 | $1.09M | 0.03% | +90+2.8% | Added |
| Exchange Traded Concepts, LLC | 3,252 | $1.08M | 0.01% | +891+37.7% | Added |
| Values First Advisors, Inc. | 3,246 | $1.07M | 0.56% | +20+0.6% | Added |
| Keybank National Association | 3,239 | $1.07M | 0.00% | −96−2.9% | Reduced |
| Wiley Bros.-Aintree Capital, LLC | 3,230 | $1.07M | 0.01% | +533+19.8% | Added |
| J. Safra Sarasin Holding AG | 3,230 | $1.07M | 0.02% | −5,908−64.7% | Reduced |
| Generali Asset Management SPA SGR | 3,193 | $1.06M | 0.02% | +3,143+6,286.0% | Added |
| Brandywine Managers, LLC | 3,168 | $1.05M | 0.62% | −450−12.4% | Reduced |
| Sanders Morris Harris LLC | 3,150 | $1.04M | 0.17% | +3,150 | New |
| Grandfield & Dodd, LLC | 3,081 | $1.02M | 0.06% | −48−1.5% | Reduced |