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 |
|---|---|---|---|---|---|
| Teachers Retirement System of the State of Kentucky | 30,696 | $10.2M | 0.08% | −920−2.9% | Reduced |
| Aquatic Capital Management LLC | 31,061 | $10.3M | 0.30% | +31,061 | New |
| DnB Asset Management AS | 31,427 | $10.4M | 0.04% | +720+2.3% | Added |
| Bank of Montreal | 31,864 | $10.5M | 0.00% | −3,252−9.3% | Reduced |
| FengHe Fund Management Pte. Ltd. | 32,500 | $10.8M | 1.49% | −186,200−85.1% | Reduced |
| Engineers Gate Manager LP | 32,502 | $10.8M | 0.13% | +12,303+60.9% | Added |
| Rosenblum Silverman Sutton S F Inc | 32,927 | $10.9M | 2.85% | −253−0.8% | Reduced |
| Oddo BHF Asset Management SAS | 33,013 | $10.9M | 0.43% | +2,880+9.6% | Added |
| Quantinno Capital Management LP | 33,850 | $11.2M | 0.02% | +8,258+32.3% | Added |
| Rhenman & Partners Asset Management AB | 34,465 | $11.4M | 1.41% | −11,210−24.5% | Reduced |
| PensionDanmark Pensionsforsikringsaktieselskab | 34,570 | $11.4M | 0.11% | −1,692−4.7% | Reduced |
| Erste Asset Management GmbH | 36,310 | $11.5M | 0.11% | +10,300+39.6% | Added |
| Healthcare of Ontario Pension Plan Trust Fund | 34,781 | $11.5M | 0.02% | −5,678−14.0% | Reduced |
| Vinva Investment Management Ltd | 36,601 | $11.6M | 0.14% | +18,640+103.8% | Added |
| STRS Ohio | 35,532 | $11.8M | 0.05% | +7,496+26.7% | Added |
| Entropy Technologies, LP | 35,719 | $11.8M | 0.55% | +19,622+121.9% | Added |
| Arizona State Retirement System | 35,899 | $11.9M | 0.07% | −491−1.3% | Reduced |
| Groupama Asset Managment | 36,767 | $12.2M | 0.18% | +889+2.5% | Added |
| Nissay Asset Management Corp | 36,898 | $12.2M | 0.06% | +1,085+3.0% | Added |
| Fideuram - Intesa Sanpaolo Private Banking S.P.A. | 37,025 | $12.3M | 0.43% | +16,543+80.8% | Added |
| Guggenheim Capital LLC | 37,114 | $12.3M | 0.10% | −3,021−7.5% | Reduced |
| Bronte Capital Management Pty Ltd. | 37,245 | $12.3M | 1.31% | −1,619−4.2% | Reduced |
| M&G Plc | 37,656 | $12.5M | 0.06% | +37,656 | New |
| Resona Asset Management Co.,Ltd. | 39,832 | $13.1M | 0.07% | +585+1.5% | Added |
| Hudson Bay Capital Management LP | 40,000 | $13.2M | 0.08% | −45,000−52.9% | Reduced |
| Lansforsakringar Fondforvaltning AB (publ) | 41,890 | $13.9M | 0.07% | −450−1.1% | Reduced |
| Worldquant Millennium Advisors LLC | 42,160 | $13.9M | 0.05% | −301,271−87.7% | Reduced |
| Mediolanum International Funds Ltd | 45,119 | $14.3M | 0.15% | +2,643+6.2% | Added |
| Gotham Asset Management, LLC | 43,710 | $14.5M | 0.04% | +4,088+10.3% | Added |
| Public Employees Retirement System of Ohio | 44,022 | $14.6M | 0.05% | −476−1.1% | Reduced |
| State of New Jersey Common Pension Fund D | 45,151 | $14.9M | 0.06% | +175+0.4% | Added |
| Advisor Group Holdings, Inc. | 46,653 | $15.4M | 0.02% | +1,935+4.3% | Added |
| Investment Management Corp of Ontario | 47,155 | $15.6M | 0.20% | +25,620+119.0% | Added |
| Allianz Asset Management GmbH | 47,662 | $15.8M | 0.02% | −213−0.4% | Reduced |
| Jain Global LLC | 47,962 | $15.9M | 0.20% | +47,962 | New |
| Fjarde Ap-Fonden /Fourth Swedish National Pension Fund | 48,705 | $16.1M | 0.09% | +18,490+61.2% | Added |
| Parnassus Investments | 48,991 | $16.2M | 0.05% | +4,431+9.9% | Added |
| Tredje AP-fonden | 49,594 | $16.4M | 0.09% | +9,147+22.6% | Added |
| Stifel Financial Corp | 49,954 | $16.5M | 0.02% | +29,527+144.5% | Added |
| Rafferty Asset Management, LLC | 50,553 | $16.7M | 0.07% | +5,522+12.3% | Added |
| KLP Kapitalforvaltning AS | 51,200 | $16.9M | 0.07% | +760+1.5% | Added |
| Capital International Sarl | 53,349 | $17.7M | 0.29% | −66,003−55.3% | Reduced |
| Alliancebernstein L.P. | 44,641 | $17.8M | 0.01% | +322+0.7% | Added |
| Van Eck Associates Corp | 54,137 | $17.9M | 0.01% | +6,215+13.0% | Added |
| Treasurer of the State of North Carolina | 54,269 | $18.0M | 0.06% | +1,155+2.2% | Added |
| SG Americas Securities, LLC | 55,060 | $18.2M | 0.02% | −35,861−39.4% | Reduced |
| Mirae Asset Global Investments Co., Ltd. | 56,391 | $18.7M | 0.05% | +6,929+14.0% | Added |
| Toroso Investments, LLC | 57,927 | $18.8M | 0.06% | +53,102+1,100.6% | Added |
| Great West Life Assurance Co | 57,255 | $19.0M | 0.03% | −624−1.1% | Reduced |
| Asset Management One Co.,Ltd. | 57,709 | $19.1M | 0.06% | −7,478−11.5% | Reduced |
| Polymer Capital Management (HK) LTD | 57,784 | $19.1M | 2.68% | +21,019+57.2% | Added |
| Driehaus Capital Management LLC | 59,622 | $19.7M | 0.15% | −10,156−14.6% | Reduced |
| PFA Pension, Forsikringsaktieselskab | 59,700 | $19.8M | 0.06% | +24,295+68.6% | Added |
| Trexquant Investment LP | 61,760 | $20.4M | 0.15% | +35,019+131.0% | Added |
| Swedbank AB | 62,215 | $20.6M | 0.02% | +273+0.4% | Added |
| National Bank of Canada | 63,607 | $21.0M | 0.02% | −2,826−4.3% | Reduced |
| Storebrand Asset Management AS | 64,595 | $21.4M | 0.06% | −10,185−13.6% | Reduced |
| Vanguard Global Advisers, LLC | 65,390 | $21.6M | 0.01% | +65,390 | New |
| New York State Common Retirement Fund | 65,424 | $21.6M | 0.03% | +1,000+1.6% | Added |
| Vanguard Investments Australia, Ltd. | 65,810 | $21.8M | 0.06% | +65,810 | New |
| Danske Bank A/S | 65,955 | $21.8M | 0.05% | −1,246−1.9% | Reduced |
| Schroder Investment Management Group | 66,662 | $22.1M | 0.02% | −1,387−2.0% | Reduced |
| LPL Financial LLC | 67,637 | $22.4M | 0.01% | +21,718+47.3% | Added |
| Deerfield Management Company, L.P. (Series C) | 67,935 | $22.5M | 0.27% | 00.0% | Unchanged |
| Intech Investment Management LLC | 68,009 | $22.5M | 0.22% | +21,299+45.6% | Added |
| NEOS Investment Management LLC | 68,873 | $22.8M | 0.12% | +28,172+69.2% | Added |
| State of Wisconsin Investment Board | 68,883 | $22.8M | 0.05% | +2,818+4.3% | Added |
| Ensign Peak Advisors, Inc | 69,647 | $23.0M | 0.04% | +11,715+20.2% | Added |
| Jones Financial Companies LLLP | 73,643 | $23.4M | 0.01% | +72,863+9,341.4% | Added |
| Schonfeld Strategic Advisors LLC | 71,767 | $23.7M | 0.19% | +26,873+59.9% | Added |
| Mitsubishi UFJ Trust & Banking Corp | 72,777 | $24.1M | 0.06% | −6,620−8.3% | Reduced |
| Rock Springs Capital Management LP | 74,000 | $24.5M | 1.44% | +2,750+3.9% | Added |
| LMR Partners LLP | 74,661 | $24.7M | 0.23% | +15,639+26.5% | Added |
| Zurcher Kantonalbank (Zurich Cantonalbank) | 74,920 | $24.8M | 0.05% | −14,884−16.6% | Reduced |
| Casdin Capital, LLC | 75,000 | $24.8M | 1.88% | 00.0% | Unchanged |
| Prosight Management, LP | 76,000 | $25.1M | 4.12% | +58,891+344.2% | Added |
| Natixis Advisors, L.P. | 78,016 | $25.8M | 0.04% | +33,681+76.0% | Added |
| Fiera Capital Corp | 78,822 | $26.1M | 0.09% | +8,102+11.5% | Added |
| Mirae Asset Global ETFs Holdings Ltd. | 81,325 | $26.9M | 0.04% | +1,224+1.5% | Added |
| Quadrature Capital Ltd | 85,241 | $28.2M | 0.34% | +85,241 | New |
| Andra AP-fonden | 86,697 | $28.7M | 0.36% | +38,157+78.6% | Added |
| Los Angeles Capital Management LLC | 88,278 | $29.2M | 0.12% | −151,774−63.2% | Reduced |
| HSBC Holdings PLC | 89,619 | $29.6M | 0.02% | +102+0.1% | Added |
| FIL Ltd | 91,499 | $30.3M | 0.02% | −2,665−2.8% | Reduced |
| Nomura Asset Management Co Ltd | 93,225 | $30.8M | 0.08% | −1,053−1.1% | Reduced |
| Neuberger Berman Group LLC | 93,496 | $30.9M | 0.02% | −21,707−18.8% | Reduced |
| Tremblant Capital Group | 94,556 | $31.3M | 1.01% | −15,576−14.1% | Reduced |
| SEI Investments Co | 100,315 | $33.2M | 0.03% | −10,797−9.7% | Reduced |
| HighTower Advisors, LLC | 105,859 | $35.0M | 0.04% | −632−0.6% | Reduced |
| Bridgewater Associates, LP | 106,592 | $35.3M | 0.16% | +20,975+24.5% | Added |
| State Board of Administration of Florida Retirement System | 112,718 | $37.3M | 0.07% | −1,885−1.6% | Reduced |
| Aviva PLC | 114,003 | $37.7M | 0.06% | +3,341+3.0% | Added |
| DekaBank Deutsche Girozentrale | 113,193 | $38.1M | 0.06% | 00.0% | Unchanged |
| OrbiMed Advisors LLC | 119,000 | $39.4M | 0.89% | −169,800−58.8% | Reduced |
| Robeco Institutional Asset Management B.V. | 126,463 | $41.8M | 0.06% | −18,258−12.6% | Reduced |
| HRT Financial LP | 128,633 | $42.6M | 0.11% | +128,633 | New |
| Assenagon Asset Management S.A. | 128,896 | $42.6M | 0.07% | +103,306+403.7% | Added |
| Soleus Capital Management, L.P. | 131,650 | $43.6M | 1.76% | +61,650+88.1% | Added |
| Brown Advisory Inc | 133,953 | $44.3M | 0.07% | +109,095+438.9% | Added |
| Handelsbanken Fonder AB | 136,462 | $45.2M | 0.15% | +277+0.2% | Added |