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 |
|---|---|---|---|---|---|
| DekaBank Deutsche Girozentrale | 113,193 | $38.1M | 0.06% | 00.0% | Unchanged |
| Aviva PLC | 114,003 | $37.7M | 0.06% | +3,341+3.0% | Added |
| State Board of Administration of Florida Retirement System | 112,718 | $37.3M | 0.07% | −1,885−1.6% | Reduced |
| Bridgewater Associates, LP | 106,592 | $35.3M | 0.16% | +20,975+24.5% | Added |
| HighTower Advisors, LLC | 105,859 | $35.0M | 0.04% | −632−0.6% | Reduced |
| SEI Investments Co | 100,315 | $33.2M | 0.03% | −10,797−9.7% | Reduced |
| Tremblant Capital Group | 94,556 | $31.3M | 1.01% | −15,576−14.1% | Reduced |
| Neuberger Berman Group LLC | 93,496 | $30.9M | 0.02% | −21,707−18.8% | Reduced |
| Nomura Asset Management Co Ltd | 93,225 | $30.8M | 0.08% | −1,053−1.1% | Reduced |
| FIL Ltd | 91,499 | $30.3M | 0.02% | −2,665−2.8% | Reduced |
| HSBC Holdings PLC | 89,619 | $29.6M | 0.02% | +102+0.1% | Added |
| Los Angeles Capital Management LLC | 88,278 | $29.2M | 0.12% | −151,774−63.2% | Reduced |
| Andra AP-fonden | 86,697 | $28.7M | 0.36% | +38,157+78.6% | Added |
| Quadrature Capital Ltd | 85,241 | $28.2M | 0.34% | +85,241 | New |
| Mirae Asset Global ETFs Holdings Ltd. | 81,325 | $26.9M | 0.04% | +1,224+1.5% | Added |
| Fiera Capital Corp | 78,822 | $26.1M | 0.09% | +8,102+11.5% | Added |
| Natixis Advisors, L.P. | 78,016 | $25.8M | 0.04% | +33,681+76.0% | Added |
| Prosight Management, LP | 76,000 | $25.1M | 4.12% | +58,891+344.2% | Added |
| Casdin Capital, LLC | 75,000 | $24.8M | 1.88% | 00.0% | Unchanged |
| Zurcher Kantonalbank (Zurich Cantonalbank) | 74,920 | $24.8M | 0.05% | −14,884−16.6% | Reduced |
| LMR Partners LLP | 74,661 | $24.7M | 0.23% | +15,639+26.5% | Added |
| Rock Springs Capital Management LP | 74,000 | $24.5M | 1.44% | +2,750+3.9% | Added |
| Mitsubishi UFJ Trust & Banking Corp | 72,777 | $24.1M | 0.06% | −6,620−8.3% | Reduced |
| Schonfeld Strategic Advisors LLC | 71,767 | $23.7M | 0.19% | +26,873+59.9% | Added |
| Jones Financial Companies LLLP | 73,643 | $23.4M | 0.01% | +72,863+9,341.4% | Added |
| Ensign Peak Advisors, Inc | 69,647 | $23.0M | 0.04% | +11,715+20.2% | Added |
| State of Wisconsin Investment Board | 68,883 | $22.8M | 0.05% | +2,818+4.3% | Added |
| NEOS Investment Management LLC | 68,873 | $22.8M | 0.12% | +28,172+69.2% | Added |
| Intech Investment Management LLC | 68,009 | $22.5M | 0.22% | +21,299+45.6% | Added |
| Deerfield Management Company, L.P. (Series C) | 67,935 | $22.5M | 0.27% | 00.0% | Unchanged |
| LPL Financial LLC | 67,637 | $22.4M | 0.01% | +21,718+47.3% | Added |
| Schroder Investment Management Group | 66,662 | $22.1M | 0.02% | −1,387−2.0% | Reduced |
| Danske Bank A/S | 65,955 | $21.8M | 0.05% | −1,246−1.9% | Reduced |
| Vanguard Investments Australia, Ltd. | 65,810 | $21.8M | 0.06% | +65,810 | New |
| New York State Common Retirement Fund | 65,424 | $21.6M | 0.03% | +1,000+1.6% | Added |
| Vanguard Global Advisers, LLC | 65,390 | $21.6M | 0.01% | +65,390 | New |
| Storebrand Asset Management AS | 64,595 | $21.4M | 0.06% | −10,185−13.6% | Reduced |
| National Bank of Canada | 63,607 | $21.0M | 0.02% | −2,826−4.3% | Reduced |
| Swedbank AB | 62,215 | $20.6M | 0.02% | +273+0.4% | Added |
| Trexquant Investment LP | 61,760 | $20.4M | 0.15% | +35,019+131.0% | Added |
| PFA Pension, Forsikringsaktieselskab | 59,700 | $19.8M | 0.06% | +24,295+68.6% | Added |
| Driehaus Capital Management LLC | 59,622 | $19.7M | 0.15% | −10,156−14.6% | Reduced |
| Polymer Capital Management (HK) LTD | 57,784 | $19.1M | 2.68% | +21,019+57.2% | Added |
| Asset Management One Co.,Ltd. | 57,709 | $19.1M | 0.06% | −7,478−11.5% | Reduced |
| Great West Life Assurance Co | 57,255 | $19.0M | 0.03% | −624−1.1% | Reduced |
| Toroso Investments, LLC | 57,927 | $18.8M | 0.06% | +53,102+1,100.6% | Added |
| Mirae Asset Global Investments Co., Ltd. | 56,391 | $18.7M | 0.05% | +6,929+14.0% | Added |
| SG Americas Securities, LLC | 55,060 | $18.2M | 0.02% | −35,861−39.4% | Reduced |
| Treasurer of the State of North Carolina | 54,269 | $18.0M | 0.06% | +1,155+2.2% | Added |
| Van Eck Associates Corp | 54,137 | $17.9M | 0.01% | +6,215+13.0% | Added |
| Alliancebernstein L.P. | 44,641 | $17.8M | 0.01% | +322+0.7% | Added |
| Capital International Sarl | 53,349 | $17.7M | 0.29% | −66,003−55.3% | Reduced |
| KLP Kapitalforvaltning AS | 51,200 | $16.9M | 0.07% | +760+1.5% | Added |
| Rafferty Asset Management, LLC | 50,553 | $16.7M | 0.07% | +5,522+12.3% | Added |
| Stifel Financial Corp | 49,954 | $16.5M | 0.02% | +29,527+144.5% | Added |
| Tredje AP-fonden | 49,594 | $16.4M | 0.09% | +9,147+22.6% | Added |
| Parnassus Investments | 48,991 | $16.2M | 0.05% | +4,431+9.9% | Added |
| Fjarde Ap-Fonden /Fourth Swedish National Pension Fund | 48,705 | $16.1M | 0.09% | +18,490+61.2% | Added |
| Jain Global LLC | 47,962 | $15.9M | 0.20% | +47,962 | New |
| Allianz Asset Management GmbH | 47,662 | $15.8M | 0.02% | −213−0.4% | Reduced |
| Investment Management Corp of Ontario | 47,155 | $15.6M | 0.20% | +25,620+119.0% | Added |
| Advisor Group Holdings, Inc. | 46,653 | $15.4M | 0.02% | +1,935+4.3% | Added |
| State of New Jersey Common Pension Fund D | 45,151 | $14.9M | 0.06% | +175+0.4% | Added |
| Public Employees Retirement System of Ohio | 44,022 | $14.6M | 0.05% | −476−1.1% | Reduced |
| Gotham Asset Management, LLC | 43,710 | $14.5M | 0.04% | +4,088+10.3% | Added |
| Mediolanum International Funds Ltd | 45,119 | $14.3M | 0.15% | +2,643+6.2% | Added |
| Worldquant Millennium Advisors LLC | 42,160 | $13.9M | 0.05% | −301,271−87.7% | Reduced |
| Lansforsakringar Fondforvaltning AB (publ) | 41,890 | $13.9M | 0.07% | −450−1.1% | Reduced |
| Hudson Bay Capital Management LP | 40,000 | $13.2M | 0.08% | −45,000−52.9% | Reduced |
| Resona Asset Management Co.,Ltd. | 39,832 | $13.1M | 0.07% | +585+1.5% | Added |
| M&G Plc | 37,656 | $12.5M | 0.06% | +37,656 | New |
| Bronte Capital Management Pty Ltd. | 37,245 | $12.3M | 1.31% | −1,619−4.2% | Reduced |
| Guggenheim Capital LLC | 37,114 | $12.3M | 0.10% | −3,021−7.5% | Reduced |
| Fideuram - Intesa Sanpaolo Private Banking S.P.A. | 37,025 | $12.3M | 0.43% | +16,543+80.8% | Added |
| Nissay Asset Management Corp | 36,898 | $12.2M | 0.06% | +1,085+3.0% | Added |
| Groupama Asset Managment | 36,767 | $12.2M | 0.18% | +889+2.5% | Added |
| Arizona State Retirement System | 35,899 | $11.9M | 0.07% | −491−1.3% | Reduced |
| Entropy Technologies, LP | 35,719 | $11.8M | 0.55% | +19,622+121.9% | Added |
| STRS Ohio | 35,532 | $11.8M | 0.05% | +7,496+26.7% | Added |
| Vinva Investment Management Ltd | 36,601 | $11.6M | 0.14% | +18,640+103.8% | Added |
| Healthcare of Ontario Pension Plan Trust Fund | 34,781 | $11.5M | 0.02% | −5,678−14.0% | Reduced |
| Erste Asset Management GmbH | 36,310 | $11.5M | 0.11% | +10,300+39.6% | Added |
| PensionDanmark Pensionsforsikringsaktieselskab | 34,570 | $11.4M | 0.11% | −1,692−4.7% | Reduced |
| Rhenman & Partners Asset Management AB | 34,465 | $11.4M | 1.41% | −11,210−24.5% | Reduced |
| Quantinno Capital Management LP | 33,850 | $11.2M | 0.02% | +8,258+32.3% | Added |
| Oddo BHF Asset Management SAS | 33,013 | $10.9M | 0.43% | +2,880+9.6% | Added |
| Rosenblum Silverman Sutton S F Inc | 32,927 | $10.9M | 2.85% | −253−0.8% | Reduced |
| Engineers Gate Manager LP | 32,502 | $10.8M | 0.13% | +12,303+60.9% | Added |
| FengHe Fund Management Pte. Ltd. | 32,500 | $10.8M | 1.49% | −186,200−85.1% | Reduced |
| Bank of Montreal | 31,864 | $10.5M | 0.00% | −3,252−9.3% | Reduced |
| DnB Asset Management AS | 31,427 | $10.4M | 0.04% | +720+2.3% | Added |
| Aquatic Capital Management LLC | 31,061 | $10.3M | 0.30% | +31,061 | New |
| Teachers Retirement System of the State of Kentucky | 30,696 | $10.2M | 0.08% | −920−2.9% | Reduced |
| Frontier Capital Management Co LLC | 30,604 | $10.1M | 0.10% | −18,255−37.4% | Reduced |
| Sierra Summit Advisors LLC | 30,298 | $10.0M | 1.46% | +30,298 | New |
| SEB Asset Management AB | 30,153 | $9.98M | 0.04% | +30,153 | New |
| GF Fund Management Co. Ltd. | 30,041 | $9.94M | 0.17% | −421−1.4% | Reduced |
| Mariner, LLC | 29,948 | $9.91M | 0.01% | −12,495−29.4% | Reduced |
| Xponance, Inc. | 29,871 | $9.88M | 0.07% | +2,543+9.3% | Added |
| CIBC Asset Management Inc | 29,472 | $9.75M | 0.02% | −360−1.2% | Reduced |