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 |
|---|---|---|---|---|---|
| Standard Life Aberdeen plc | 138,331 | $45.8M | 0.07% | +5,485+4.1% | Added |
| Universal- Beteiligungs- und Servicegesellschaft mbH | 139,708 | $46.1M | 0.08% | +15,063+12.1% | Added |
| Capital Fund Management S.A. | 140,109 | $46.4M | 0.42% | +119,169+569.1% | Added |
| Antipodes Partners Ltd | 145,310 | $48.1M | 0.93% | +97,424+203.4% | Added |
| Russell Investments Group, Ltd. | 147,533 | $48.5M | 0.05% | −18,207−11.0% | Reduced |
| Janus Henderson Group PLC | 147,089 | $48.7M | 0.02% | +10,664+7.8% | Added |
| Voya Investment Management LLC | 148,488 | $49.1M | 0.05% | −50,125−25.2% | Reduced |
| SCS Capital Management LLC | 149,547 | $49.5M | 0.52% | −640.0% | Reduced |
| Mitsubishi UFJ Kokusai Asset Management Co., Ltd. | 152,197 | $50.4M | 0.03% | +13,402+9.7% | Added |
| CIBC Bancorp USA Inc. | 169,031 | $55.9M | 0.08% | +169,031 | New |
| Envestnet Asset Management Inc | 171,797 | $56.8M | 0.02% | +51,276+42.5% | Added |
| ProShare Advisors LLC | 174,013 | $57.6M | 0.09% | −37,064−17.6% | Reduced |
| Susquehanna International Group, LLP | 174,268 | $57.7M | 0.07% | −17,552−9.2% | Reduced |
| Life Cycle Investment Partners Ltd | 177,541 | $58.7M | 0.37% | +89,465+101.6% | Added |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. | 180,012 | $59.6M | 0.07% | +70,408+64.2% | Added |
| National Pension Service | 183,789 | $60.8M | 0.05% | +15,640+9.3% | Added |
| Voloridge Investment Management, LLC | 189,217 | $62.6M | 0.25% | +28,640+17.8% | Added |
| Rhumbline Advisers | 195,277 | $64.6M | 0.06% | +110.0% | Added |
| Victory Capital Management Inc | 195,937 | $64.8M | 0.04% | −24,929−11.3% | Reduced |
| California State Teachers Retirement System | 196,863 | $65.1M | 0.07% | −4,953−2.5% | Reduced |
| Korea Investment CORP | 200,321 | $66.3M | 0.14% | +10,552+5.6% | Added |
| Canada Pension Plan Investment Board | 208,938 | $69.1M | 0.04% | −49,773−19.2% | Reduced |
| Jacobs Levy Equity Management, Inc | 212,204 | $70.2M | 0.30% | −189,167−47.1% | Reduced |
| Royal London Asset Management Ltd | 215,075 | $71.2M | 0.15% | −37,997−15.0% | Reduced |
| Vanguard Asset Management, Ltd | 219,235 | $72.5M | 0.06% | +219,235 | New |
| Barclays PLC | 220,623 | $73.0M | 0.03% | −1,938−0.9% | Reduced |
| Candriam Luxembourg S.C.A. | 224,330 | $74.2M | 0.39% | 00.0% | Unchanged |
| California Public Employees Retirement System | 227,997 | $75.4M | 0.05% | −9,008−3.8% | Reduced |
| Man Group plc | 232,369 | $76.9M | 0.16% | +88,159+61.1% | Added |
| Pictet Asset Management Holding SA | 237,920 | $77.5M | 0.08% | −78,133−24.7% | Reduced |
| Bellevue Group AG | 234,543 | $77.6M | 1.85% | −211,360−47.4% | Reduced |
| Ameriprise Financial Inc | 239,941 | $79.4M | 0.02% | +58,804+32.5% | Added |
| Woodline Partners LP | 243,883 | $80.7M | 0.31% | +242,124+13,764.9% | Added |
| Westfield Capital Management Co LP | 245,539 | $81.2M | 0.34% | +152,095+162.8% | Added |
| Polar Capital Holdings Plc | 257,674 | $85.3M | 0.37% | +17,068+7.1% | Added |
| Nomura Asset Management International Inc. | 258,905 | $85.7M | 0.15% | −52,852−17.0% | Reduced |
| Citigroup Inc | 263,375 | $87.1M | 0.06% | +90,813+52.6% | Added |
| Pinebridge Investments LLC | 271,419 | $89.8M | 0.76% | +171,220+170.9% | Added |
| Allspring Global Investments Holdings, LLC | 281,793 | $92.6M | 0.16% | +3,136+1.1% | Added |
| Gilder Gagnon Howe & Co LLC | 280,092 | $92.7M | 1.11% | −39,213−12.3% | Reduced |
| BNP Paribas Arbitrage, SA | 280,965 | $93.0M | 0.06% | −108,470−27.9% | Reduced |
| TD Asset Management Inc | 281,848 | $93.3M | 0.08% | +12,747+4.7% | Added |
| Congress Asset Management Co | 285,739 | $94.5M | 0.68% | +16,500+6.1% | Added |
| Sumitomo Mitsui Trust Holdings, Inc. | 314,417 | $104.0M | 0.07% | −13,346−4.1% | Reduced |
| Nuveen, LLC | 322,232 | $106.6M | 0.03% | −243,557−43.0% | Reduced |
| Wells Fargo & Company | 342,763 | $113.4M | 0.02% | +85,123+33.0% | Added |
| First Trust Advisors LP | 382,701 | $126.6M | 0.09% | +125,747+48.9% | Added |
| Dimensional Fund Advisors LP | 384,205 | $127.1M | 0.03% | +82,340+27.3% | Added |
| Swiss National Bank | 387,720 | $128.3M | 0.07% | +28,520+7.9% | Added |
| Raymond James Financial Inc | 406,956 | $130.0M | 0.04% | +18,251+4.7% | Added |
| Squarepoint Ops LLC | 426,723 | $141.2M | 0.30% | +75,754+21.6% | Added |
| Millennium Management LLC | 447,887 | $148.2M | 0.11% | +372,457+493.8% | Added |
| UBS Group AG | 458,870 | $151.8M | 0.03% | −366,970−44.4% | Reduced |
| Goldman Sachs Group Inc | 469,388 | $155.3M | 0.02% | +94,065+25.1% | Added |
| Franklin Resources Inc | 470,390 | $155.6M | 0.04% | −317,233−40.3% | Reduced |
| Bank of New York Mellon Corp | 491,200 | $162.5M | 0.03% | −12,933−2.6% | Reduced |
| Massachusetts Financial Services Co | 496,004 | $164.1M | 0.06% | +697+0.1% | Added |
| Loomis Sayles & Co L P | 512,097 | $169.4M | 0.23% | +23,200+4.7% | Added |
| Manufacturers Life Insurance Company, The | 662,365 | $219.2M | 0.19% | +598,953+944.5% | Added |
| Charles Schwab Investment Management Inc | 673,356 | $222.8M | 0.03% | +25,517+3.9% | Added |
| UBS Asset Management Americas Inc | 677,519 | $224.2M | 0.05% | +25,153+3.9% | Added |
| Federated Hermes, Inc. | 687,816 | $227.6M | 0.37% | +59,753+9.5% | Added |
| Amundi | 747,544 | $247.3M | 0.07% | +138,665+22.8% | Added |
| Deutsche Bank AG | 761,464 | $251.9M | 0.08% | +49,489+7.0% | Added |
| Royal Bank of Canada | 791,515 | $261.9M | 0.05% | +200,020+33.8% | Added |
| Qube Research & Technologies Ltd | 838,187 | $277.3M | 0.39% | +63,511+8.2% | Added |
| Vanguard Fiduciary Trust Co | 840,888 | $278.2M | 0.07% | +840,888 | New |
| Northern Trust Corp | 858,120 | $283.9M | 0.04% | +3780.0% | Added |
| AQR Capital Management LLC | 913,104 | $297.9M | 0.14% | −6,855−0.7% | Reduced |
| Legal & General Group Plc | 934,881 | $309.3M | 0.07% | −26,615−2.8% | Reduced |
| Bank of America Corp | 966,912 | $319.9M | 0.02% | +281,735+41.1% | Added |
| Morgan Stanley | 1,002,681 | $331.8M | 0.02% | +32,524+3.4% | Added |
| D. E. Shaw & Co., Inc. | 1,059,062 | $350.4M | 0.28% | +614,569+138.3% | Added |
| Marshall Wace, LLP | 1,099,318 | $363.7M | 0.39% | +549,396+99.9% | Added |
| Orbis Allan Gray Ltd | 1,334,825 | $441.7M | 1.86% | −283,394−17.5% | Reduced |
| Clearbridge Investments, LLC | 1,356,036 | $448.7M | 0.39% | +759,023+127.1% | Added |
| Price T Rowe Associates Inc | 1,432,748 | $474.1M | 0.05% | −270,083−15.9% | Reduced |
| American Century Companies Inc | 1,802,363 | $596.3M | 0.31% | +317,202+21.4% | Added |
| Dodge & Cox | 1,929,253 | $638.3M | 0.35% | −35,162−1.8% | Reduced |
| Wellington Management Group LLP | 1,935,925 | $640.5M | 0.12% | +306,994+18.8% | Added |
| Two Sigma Investments, LP | 1,992,577 | $659.3M | 0.55% | +1,376,457+223.4% | Added |
| Baillie Gifford & Co | 2,493,866 | $825.1M | 0.84% | −107,113−4.1% | Reduced |
| Geode Capital Management, LLC | 2,660,385 | $884.6M | 0.06% | +9,663+0.4% | Added |
| State Street Corp | 3,322,698 | $1.10B | 0.04% | +93,742+2.9% | Added |
| Invesco Ltd. | 4,075,120 | $1.35B | 0.13% | −1,058,863−20.6% | Reduced |
| T. Rowe Price Investment Management, Inc. | 5,193,324 | $1.72B | 1.18% | +3,439,684+196.1% | Added |
| Vanguard Capital Management LLC | 5,946,706 | $1.97B | 0.05% | +5,946,706 | New |
| JPMorgan Chase & Co | 6,323,752 | $2.00B | 0.14% | +1,603,753+34.0% | Added |
| Vanguard Portfolio Management LLC | 6,491,280 | $2.15B | 0.11% | +6,491,280 | New |
| Capital Research Global Investors | 9,471,181 | $3.13B | 0.49% | +2,691,473+39.7% | Added |
| BlackRock, Inc. | 10,444,908 | $3.46B | 0.06% | +44,034+0.4% | Added |
| Capital World Investors | 10,802,348 | $3.57B | 0.49% | −5,499,424−33.7% | Reduced |
| FMR LLC | 14,579,166 | $4.82B | 0.25% | −1,322,983−8.3% | Reduced |
| Two Sigma Advisers, LP | 0 | $0 | 0.00% | −1,132,560−100.0% | Sold out |
| Arrowstreet Capital, Limited Partnership | 0 | $0 | 0.00% | −1,127,162−100.0% | Sold out |
| 1832 Asset Management L.P. | 0 | $0 | 0.00% | −440,145−100.0% | Sold out |
| Jennison Associates LLC | 0 | $0 | 0.00% | −277,759−100.0% | Sold out |
| Skandinaviska Enskilda Banken AB (publ) | 0 | $0 | 0.00% | −66,218−100.0% | Sold out |
| Integral Health Asset Management, LLC | 0 | $0 | 0.00% | −60,000−100.0% | Sold out |
| Lord, Abbett & Co. LLC | 0 | $0 | 0.00% | −35,406−100.0% | Sold out |