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 |
|---|---|---|---|---|---|
| Nisa Investment Advisors, LLC | 9,357 | $3.10M | 0.01% | −292−3.0% | Reduced |
| Blair William & Co | 9,430 | $3.12M | 0.01% | −344−3.5% | Reduced |
| Commerce Bank | 9,480 | $3.14M | 0.02% | −1,053−10.0% | Reduced |
| Fifth Third Bancorp | 9,568 | $3.17M | 0.01% | +9,441+7,433.9% | Added |
| Vestmark Advisory Solutions, Inc. | 9,589 | $3.17M | 0.04% | +811+9.2% | Added |
| Tower Research Capital LLC (TRC) | 9,627 | $3.19M | 0.08% | +3,786+64.8% | Added |
| O'Shaughnessy Asset Management, LLC | 9,637 | $3.19M | 0.02% | −290−2.9% | Reduced |
| PEAK6 LLC | 9,716 | $3.21M | 0.09% | +9,714+485,700.0% | Added |
| Harvest Fund Management Co., Ltd | 9,854 | $3.26M | 0.14% | −465−4.5% | Reduced |
| Atria Investments LLC | 9,874 | $3.27M | 0.04% | +3,701+60.0% | Added |
| Amalgamated Bank | 9,937 | $3.29M | 0.03% | −742−6.9% | Reduced |
| Raiffeisen Bank International AG | 10,413 | $3.29M | 0.05% | −1,093−9.5% | Reduced |
| Martingale Asset Management L P | 10,114 | $3.35M | 0.08% | +990+10.9% | Added |
| Gulf International Bank (UK) Ltd | 10,197 | $3.37M | 0.08% | +3,570+53.9% | Added |
| Panagora Asset Management Inc | 10,343 | $3.42M | 0.01% | −20,500−66.5% | Reduced |
| Silvercrest Asset Management Group LLC | 10,429 | $3.45M | 0.02% | +19+0.2% | Added |
| Motley Fool Asset Management LLC | 10,492 | $3.47M | 0.15% | −2,034−16.2% | Reduced |
| Commonwealth Equity Services, LLC | 10,577 | $3.50M | 0.00% | +832+8.5% | Added |
| Cullen/Frost Bankers, Inc. | 10,999 | $3.64M | 0.04% | −34−0.3% | Reduced |
| ASR Vermogensbeheer N.V. | 11,223 | $3.71M | 0.04% | +201+1.8% | Added |
| Y-Intercept (Hong Kong) Ltd | 11,361 | $3.76M | 0.07% | +11,361 | New |
| CWM, LLC | 11,580 | $3.83M | 0.01% | −13,895−54.5% | Reduced |
| Wealthfront Advisers LLC | 11,587 | $3.83M | 0.01% | −6,667−36.5% | Reduced |
| Federation des caisses Desjardins du Quebec | 11,731 | $3.88M | 0.01% | −818−6.5% | Reduced |
| Credit Agricole S A | 11,751 | $3.89M | 0.01% | −9,789−45.4% | Reduced |
| Traynor Capital Management, Inc. | 12,592 | $3.98M | 0.24% | +1,022+8.8% | Added |
| JustInvest LLC | 12,215 | $4.04M | 0.04% | −1,512−11.0% | Reduced |
| Privium Fund Management B.V. | 12,222 | $4.04M | 0.84% | +12,222 | New |
| The PNC Financial Services Group, Inc. | 12,322 | $4.08M | 0.00% | −356−2.8% | Reduced |
| Public Employees Retirement Association of Colorado | 12,445 | $4.12M | 0.02% | 00.0% | Unchanged |
| Ilmarinen Mutual Pension Insurance Co | 12,500 | $4.14M | 0.03% | 00.0% | Unchanged |
| Captrust Financial Advisors | 12,503 | $4.14M | 0.01% | −752−5.7% | Reduced |
| Fred Alger Management, LLC | 12,597 | $4.17M | 0.02% | +12,597 | New |
| Bank Julius Baer & Co. Ltd, Zurich | 13,281 | $4.26M | 0.01% | +13,281 | New |
| Capula Management Ltd | 13,115 | $4.34M | 0.04% | −66−0.5% | Reduced |
| Empire Life Investments Inc. | 13,215 | $4.34M | 0.26% | +13,215 | New |
| Nordea Investment Management AB | 13,346 | $4.35M | 0.00% | +491+3.8% | Added |
| Himension Fund | 13,169 | $4.36M | 0.33% | +2,984+29.3% | Added |
| Mirova | 13,678 | $4.53M | 0.18% | +13,678 | New |
| Dark Forest Capital Management LP | 13,707 | $4.54M | 0.40% | +6,992+104.1% | Added |
| Rakuten Investment Management, Inc. | 14,431 | $4.56M | 0.01% | +1,747+13.8% | Added |
| La Banque Postale Asset Management SA | 14,206 | $4.70M | 0.06% | +6,416+82.4% | Added |
| Assetmark, Inc | 14,207 | $4.70M | 0.01% | −1,826−11.4% | Reduced |
| Nomura Holdings Inc | 14,299 | $4.73M | 0.04% | −8,138−36.3% | Reduced |
| Elo Mutual Pension Insurance Co | 14,621 | $4.84M | 0.08% | −2,820−16.2% | Reduced |
| Profund Advisors LLC | 14,647 | $4.85M | 0.18% | −942−6.0% | Reduced |
| Shelton Capital Management | 14,837 | $4.91M | 0.11% | −227−1.5% | Reduced |
| MML Investors Services, LLC | 15,482 | $5.12M | 0.01% | −2,168−12.3% | Reduced |
| iA Global Asset Management Inc. | 15,922 | $5.27M | 0.07% | −1,858−10.4% | Reduced |
| Sumitomo Mitsui DS Asset Management Company, Ltd | 15,943 | $5.28M | 0.04% | +74+0.5% | Added |
| Macquarie Group Ltd | 16,047 | $5.31M | 0.03% | −9,234−36.5% | Reduced |
| Lazard Asset Management LLC | 16,280 | $5.39M | 0.01% | +6,128+60.4% | Added |
| Portman Square Capital LLP | 16,924 | $5.60M | 0.85% | +14,467+588.8% | Added |
| Natixis | 17,076 | $5.65M | 0.02% | −22,703−57.1% | Reduced |
| Slow Capital, Inc. | 17,461 | $5.78M | 0.75% | +17,461 | New |
| Hantz Financial Services, Inc. | 17,673 | $5.85M | 0.09% | +6,350+56.1% | Added |
| Public Sector Pension Investment Board | 18,014 | $5.96M | 0.02% | +18,014 | New |
| British Columbia Investment Management Corp | 18,208 | $6.02M | 0.04% | −5,012−21.6% | Reduced |
| Liontrust Investment Partners LLP | 18,218 | $6.03M | 0.10% | −169−0.9% | Reduced |
| Silvant Capital Management LLC | 18,258 | $6.04M | 0.21% | +294+1.6% | Added |
| Toronto Dominion Bank | 18,602 | $6.15M | 0.01% | −4,597−19.8% | Reduced |
| Teacher Retirement System of Texas | 18,830 | $6.23M | 0.03% | −1,205−6.0% | Reduced |
| Jump Financial, LLC | 19,152 | $6.34M | 0.09% | −11,410−37.3% | Reduced |
| Police & Firemen's Retirement System of New Jersey | 19,653 | $6.50M | 0.06% | +358+1.9% | Added |
| Oppenheimer Asset Management Inc. | 19,842 | $6.57M | 0.07% | +4,250+27.3% | Added |
| Cerity Partners LLC | 20,256 | $6.70M | 0.01% | −4,322−17.6% | Reduced |
| Thrivent Financial for Lutherans | 20,470 | $6.77M | 0.01% | −171−0.8% | Reduced |
| KBC Group NV | 20,524 | $6.79M | 0.02% | −327,670−94.1% | Reduced |
| Utah Retirement Systems | 20,601 | $6.82M | 0.07% | −124−0.6% | Reduced |
| 683 Capital Management, LLC | 21,000 | $6.95M | 0.64% | +17,218+455.3% | Added |
| Varma Mutual Pension Insurance Co | 21,100 | $6.98M | 0.04% | −5,000−19.2% | Reduced |
| Mackenzie Financial Corp | 22,507 | $7.45M | 0.01% | +10,112+81.6% | Added |
| Ieq Capital, LLC | 22,871 | $7.57M | 0.04% | −42,034−64.8% | Reduced |
| Cetera Investment Advisers | 23,173 | $7.67M | 0.01% | +5,624+32.0% | Added |
| Citadel Advisors LLC | 23,415 | $7.75M | 0.01% | −15,044−39.1% | Reduced |
| OP Asset Management Ltd | 23,477 | $7.77M | 0.08% | +8,707+59.0% | Added |
| Swiss Life Asset Management Ltd | 23,734 | $7.85M | 0.04% | +1,262+5.6% | Added |
| Eurizon Capital SGR S.p.A. | 24,184 | $7.96M | 0.02% | −226−0.9% | Reduced |
| Voleon Capital Management LP | 24,074 | $7.97M | 0.17% | −27,043−52.9% | Reduced |
| Creative Planning | 24,122 | $7.98M | 0.01% | +307+1.3% | Added |
| Ossiam | 24,183 | $8.00M | 0.14% | +22,397+1,254.0% | Added |
| Illinois Municipal Retirement Fund | 24,295 | $8.04M | 0.10% | −1,476−5.7% | Reduced |
| U.S. Capital Wealth Advisors, LLC | 24,537 | $8.12M | 0.20% | −2,806−10.3% | Reduced |
| Daiwa Securities Group Inc. | 25,364 | $8.39M | 0.02% | −635−2.4% | Reduced |
| Capital International Inc | 25,550 | $8.45M | 0.07% | −34,002−57.1% | Reduced |
| Jefferies Financial Group Inc. | 25,553 | $8.45M | 0.10% | −769−2.9% | Reduced |
| EFG International AG | 25,565 | $8.46M | 0.18% | −835−3.2% | Reduced |
| CI Private Wealth, LLC | 25,718 | $8.50M | 0.01% | +1,955+8.2% | Added |
| USS Investment Management Ltd | 26,848 | $8.88M | 0.04% | +624+2.4% | Added |
| Parkman Healthcare Partners LLC | 26,916 | $8.91M | 0.92% | −20,787−43.6% | Reduced |
| IFM Investors Pty Ltd | 27,266 | $9.02M | 0.08% | +1,028+3.9% | Added |
| China Universal Asset Management Co., Ltd. | 27,266 | $9.02M | 0.68% | +1,999+7.9% | Added |
| Capital International Ltd | 29,078 | $9.62M | 0.36% | −38,589−57.0% | Reduced |
| CIBC Asset Management Inc | 29,472 | $9.75M | 0.02% | −360−1.2% | Reduced |
| Xponance, Inc. | 29,871 | $9.88M | 0.07% | +2,543+9.3% | Added |
| Mariner, LLC | 29,948 | $9.91M | 0.01% | −12,495−29.4% | Reduced |
| GF Fund Management Co. Ltd. | 30,041 | $9.94M | 0.17% | −421−1.4% | Reduced |
| SEB Asset Management AB | 30,153 | $9.98M | 0.04% | +30,153 | New |
| Sierra Summit Advisors LLC | 30,298 | $10.0M | 1.46% | +30,298 | New |
| Frontier Capital Management Co LLC | 30,604 | $10.1M | 0.10% | −18,255−37.4% | Reduced |