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 |
|---|---|---|---|---|---|
| Callan Family Office, LLC | 3,035 | $1.00M | 0.02% | −579−16.0% | Reduced |
| Gsa Capital Partners LLP | 2,990 | $989.0K | 0.06% | +2,990 | New |
| Everence Capital Management Inc | 2,970 | $983.0K | 0.06% | 00.0% | Unchanged |
| SBI Okasan Asset Management Co.Ltd. | 3,100 | $979.9K | 0.04% | −190−5.8% | Reduced |
| Prudential Financial Inc | 2,956 | $978.1K | 0.00% | −10,353−77.8% | Reduced |
| Merit Financial Group, LLC | 2,903 | $960.5K | 0.01% | −1,608−35.6% | Reduced |
| Everhart Financial Group, Inc. | 2,901 | $959.9K | 0.08% | +360+14.2% | Added |
| Generali Investments CEE, investicni spolecnost, a.s. | 2,900 | $959.5K | 0.05% | 00.0% | Unchanged |
| Havemeyer Place LP | 2,878 | $952.2K | 0.11% | +2,580+865.8% | Added |
| Western Financial Corp | 2,866 | $948.3K | 0.37% | +135+4.9% | Added |
| Orion Capital Management LLC | 2,855 | $944.6K | 0.33% | −112−3.8% | Reduced |
| Siemens Fonds Invest GmbH | 2,838 | $939.0K | 0.05% | +1,001+54.5% | Added |
| Robertson Stephens Wealth Management, LLC | 2,836 | $938.4K | 0.03% | +36+1.3% | Added |
| Anchor Investment Management, LLC | 2,819 | $932.7K | 0.08% | +124+4.6% | Added |
| Hall Laurie J Trustee | 2,812 | $930.4K | 0.33% | 00.0% | Unchanged |
| Park Avenue Securities LLC | 2,796 | $925.0K | 0.01% | +405+16.9% | Added |
| Principal Securities, Inc. | 2,745 | $908.2K | 0.01% | +119+4.5% | Added |
| Theory Financial LLC | 2,744 | $907.9K | 0.32% | 00.0% | Unchanged |
| Flputnam Investment Management Co | 2,741 | $906.9K | 0.01% | +2,741 | New |
| Shepherd Financial Partners LLC | 2,736 | $905.3K | 0.09% | 00.0% | Unchanged |
| Private Advisory Group LLC | 2,729 | $902.9K | 0.06% | +574+26.6% | Added |
| RSM US Wealth Management LLC | 2,711 | $896.9K | 0.01% | +136+5.3% | Added |
| Regal Investment Advisors LLC | 2,691 | $890.5K | 0.05% | −23−0.8% | Reduced |
| Perpetual Ltd | 2,690 | $890.0K | 0.01% | −2,349−46.6% | Reduced |
| Financiere des Professionnels - Fonds d,investissement inc. | 2,689 | $889.7K | 0.05% | 00.0% | Unchanged |
| Walleye Capital LLC | 2,639 | $873.2K | 0.01% | −3,329−55.8% | Reduced |
| Horizon Investments, LLC | 2,632 | $870.9K | 0.01% | +2,181+483.6% | Added |
| J.Safra Asset Management Corp | 2,613 | $864.6K | 0.05% | +974+59.4% | Added |
| Sectoral Asset Management Inc | 2,310 | $864.2K | 0.72% | −680−22.7% | Reduced |
| UniSuper Management Pty Ltd | 2,500 | $827.2K | 0.01% | 00.0% | Unchanged |
| Westpac Banking Corp | 2,452 | $811.3K | 0.06% | −2,859−53.8% | Reduced |
| Central Pacific Bank - Trust Division | 2,413 | $798.4K | 0.10% | 00.0% | Unchanged |
| Cannon Global Investment Management, LLC | 2,400 | $794.1K | 1.92% | +2,400 | New |
| Nixon Peabody Trust Co | 2,322 | $768.3K | 0.06% | −15−0.6% | Reduced |
| GWM Advisors LLC | 2,316 | $766.3K | 0.00% | −701−23.2% | Reduced |
| QRG Capital Management, Inc. | 2,277 | $753.5K | 0.01% | −86−3.6% | Reduced |
| Horizon Kinetics Asset Management LLC | 2,272 | $751.7K | 0.01% | −104−4.4% | Reduced |
| Gateway Investment Advisers LLC | 2,251 | $744.8K | 0.01% | −2,890−56.2% | Reduced |
| Pallas Capital Advisors LLC | 2,212 | $731.9K | 0.03% | −1,897−46.2% | Reduced |
| ICICI Prudential Asset Management Co Ltd | 2,197 | $726.9K | 0.09% | +77+3.6% | Added |
| TCW Group Inc | 2,102 | $695.5K | 0.01% | +102+5.1% | Added |
| Signaturefd, LLC | 2,047 | $677.4K | 0.01% | +66+3.3% | Added |
| Archford Capital Strategies, LLC | 2,036 | $673.7K | 0.08% | +12+0.6% | Added |
| Hunting Hill Global Capital, LLC | 2,034 | $673.0K | 0.80% | −2,225−52.2% | Reduced |
| Security National Bank of So Dak | 2,000 | $661.7K | 0.32% | 00.0% | Unchanged |
| Marex Group plc | 2,000 | $661.7K | 0.01% | +2,000 | New |
| HB Wealth Management, LLC | 1,995 | $660.1K | 0.00% | +294+17.3% | Added |
| Caisse de Depot Et Placement du Quebec | 1,988 | $657.8K | 0.00% | −49,610−96.1% | Reduced |
| Tema ETFs LLC | 1,972 | $652.5K | 0.04% | −24−1.2% | Reduced |
| V-Square Quantitative Management LLC | 1,969 | $651.5K | 0.07% | +11+0.6% | Added |
| Kovitz Investment Group Partners, LLC | 1,958 | $648.0K | 0.02% | +3+0.2% | Added |
| TD Waterhouse Canada Inc. | 1,971 | $647.1K | 0.00% | +1,641+497.3% | Added |
| Elm Partners Management LLC | 2,043 | $645.8K | 0.03% | +35+1.7% | Added |
| Cambridge Investment Research Advisors, Inc. | 1,927 | $638.0K | 0.00% | −1,105−36.4% | Reduced |
| Bannerman Wealth Management Group, LLC | 1,916 | $633.9K | 0.43% | −31−1.6% | Reduced |
| Unique Wealth Strategies, LLC | 1,854 | $613.3K | 0.25% | +1,854 | New |
| Meeder Advisory Services, Inc. | 1,853 | $613.1K | 0.03% | +15+0.8% | Added |
| Davenport & Co LLC | 1,842 | $609.5K | 0.00% | +83+4.7% | Added |
| Ellevest, Inc. | 1,837 | $607.8K | 0.08% | +974+112.9% | Added |
| Vise Technologies, Inc. | 1,515 | $602.4K | 0.01% | 00.0% | Unchanged |
| Capstone Capital Management Ltd | 1,767 | $584.6K | 0.59% | −534−23.2% | Reduced |
| Yousif Capital Management, LLC | 1,764 | $583.7K | 0.01% | +88+5.3% | Added |
| GraniteShares Advisors LLC | 1,755 | $580.7K | 0.42% | −31−1.7% | Reduced |
| Kepler Cheuvreux (Suisse) SA | 1,713 | $566.8K | 0.04% | +1,713 | New |
| Harbor Capital Advisors, Inc. | 1,704 | $564.0K | 0.05% | +1,704 | New |
| Fort Sheridan Advisors LLC | 1,701 | $562.8K | 0.07% | 00.0% | Unchanged |
| Marks Group Wealth Management, Inc | 1,650 | $545.9K | 0.05% | +1,650 | New |
| Souders Financial Advisors | 1,644 | $544.0K | 0.06% | +234+16.6% | Added |
| Ballentine Partners, LLC | 1,639 | $542.3K | 0.01% | −82−4.8% | Reduced |
| Emerald Advisers, LLC | 1,622 | $536.7K | 0.02% | 00.0% | Unchanged |
| Independent Advisor Alliance | 1,602 | $530.1K | 0.01% | +997+164.8% | Added |
| Steward Partners Investment Advisory, LLC | 1,583 | $523.8K | 0.00% | +158+11.1% | Added |
| Buckingham Strategic Partners | 1,582 | $522.6K | 0.01% | −2,513−61.4% | Reduced |
| Howard Capital Management Inc. | 1,570 | $519.5K | 0.01% | −2,110−57.3% | Reduced |
| Norden Group LLC | 1,553 | $513.8K | 0.05% | +363+30.5% | Added |
| Fulton Bank, N.A. | 1,549 | $512.5K | 0.02% | +119+8.3% | Added |
| Aptus Capital Advisors, LLC | 1,513 | $500.6K | 0.00% | +1,513 | New |
| High Net Worth Advisory Group LLC | 1,500 | $496.3K | 0.12% | 00.0% | Unchanged |
| Loring Wolcott & Coolidge Fiduciary Advisors LLP | 1,533 | $493.8K | 0.00% | 00.0% | Unchanged |
| Regions Financial Corp | 1,473 | $487.4K | 0.00% | +1,473 | New |
| Qtron Investments LLC | 1,471 | $486.7K | 0.07% | 00.0% | Unchanged |
| PSP Research LLC | 1,465 | $484.7K | 0.34% | +147+11.2% | Added |
| Stephens Inc | 1,425 | $471.5K | 0.01% | +580+68.6% | Added |
| Optimize Financial Inc | 1,381 | $456.9K | 0.22% | +1,381 | New |
| AlphaCentric Advisors LLC | 1,370 | $453.3K | 0.45% | +75+5.8% | Added |
| Virginia Retirement Systems Et Al | 1,360 | $450.0K | 0.00% | +1,360 | New |
| Coldstream Capital Management Inc | 1,351 | $447.0K | 0.01% | −223−14.2% | Reduced |
| Wealthcare Advisory Partners LLC | 1,330 | $440.1K | 0.01% | +19+1.4% | Added |
| Founders Financial Securities LLC | 1,361 | $437.3K | 0.02% | +1,361 | New |
| Altfest L J & Co Inc | 1,317 | $435.8K | 0.05% | −61−4.4% | Reduced |
| Smartleaf Asset Management LLC | 1,361 | $430.2K | 0.02% | +158+13.1% | Added |
| Crossmark Global Holdings, Inc. | 1,293 | $427.8K | 0.01% | +12+0.9% | Added |
| ING Groep NV | 1,289 | $426.5K | 0.00% | −1,155−47.3% | Reduced |
| Sava Infond d.o.o. | 1,285 | $425.2K | 0.06% | 00.0% | Unchanged |
| Allworth Financial LP | 1,283 | $424.6K | 0.00% | −70−5.2% | Reduced |
| Mount Yale Investment Advisors, LLC | 1,263 | $417.9K | 0.01% | +1,263 | New |
| Frank, Rimerman Advisors LLC | 1,256 | $415.6K | 0.03% | +6+0.5% | Added |
| S-Bank Fund Management Ltd | 1,235 | $408.6K | 0.06% | −46−3.6% | Reduced |
| Dynasty Wealth Management, LLC | 1,234 | $408.3K | 0.00% | +546+79.4% | Added |
| Cigna Investments Inc | 1,230 | $407.0K | 0.06% | 00.0% | Unchanged |