Alnylam Pharmaceuticals Ownership | Who Owns Alnylam Pharmaceuticals?
Alnylam Pharmaceuticals Ownership Summary
Alnylam Pharmaceuticals is owned by 102.93% institutional investors, 3.80% insiders. Capital world investors is the largest institutional shareholder, holding 12.96% of ALNY shares. Capital Group Growth Fnd of Amer Comp is the top mutual fund, with 7.81% of its assets in Alnylam Pharmaceuticals shares.
ALNY Ownership Benchmark
| Type | Name | % Inst | % Insiders | % Retail |
|---|---|---|---|---|
| Stock | Alnylam Pharmaceuticals | 102.93% | 3.80% | -6.73% |
| Sector | Healthcare Stocks | 486.50% | 11.08% | -397.59% |
| Industry | Biotech Stocks | 304.14% | 11.08% | -215.23% |
Institutional Shareholders
Top Institutional Shareholders by Total Shares
| Holder | Shares | % Holding | Value |
|---|---|---|---|
| Capital world investors | 16.81M | 12.96% | $5.48B |
| Fmr | 13.49M | 10.49% | $3.17B |
| Vanguard group | 12.73M | 9.90% | $3.00B |
| Blackrock funding, inc. /de | 9.98M | 7.70% | $3.25B |
| Blackrock | 9.55M | 7.57% | $2.32B |
| Capital research global investors | 7.19M | 5.55% | $2.35B |
| Regeneron pharmaceuticals | 4.44M | 3.43% | $1.45B |
| T. rowe price investment management | 4.28M | 3.30% | $1.40B |
| Wellington management group llp | 4.20M | 3.26% | $987.51M |
| Baillie gifford | 4.04M | 3.14% | $950.71M |
Top Institutional Shareholders by % of Total Assets
| Holder | Shares | % Assets | Value |
|---|---|---|---|
| Regeneron pharmaceuticals | 4.44M | 97.59% | $1.45B |
| Palo alto investors lp | 75.53K | 5.24% | $24.63M |
| Bellevue group | 676.37K | 4.86% | $220.56M |
| Eagle health investments lp | 76.26K | 4.40% | $17.94M |
| Ikarian capital | 56.59K | 3.54% | $18.45M |
| Parkman healthcare partners | 92.34K | 3.46% | $30.11M |
| Orbis allan gray | 2.12M | 3.36% | $691.77M |
| Orbimed advisors | 341.90K | 2.79% | $111.49M |
| Rosenblum silverman sutton s f inc /ca | 34.39K | 2.72% | $11.21M |
| Casdin capital | 81.50K | 2.42% | $26.58M |
Top Buyers
| Holder | Shares | % Assets | Change |
|---|---|---|---|
| Norges bank | 2.46M | 0.08% | 2.46M |
| Holocene advisors, lp | 596.82K | 0.47% | 596.82K |
| Blackrock | 9.55M | 0.05% | 522.66K |
| Orbis allan gray | 2.12M | 3.36% | 486.49K |
| Blackrock funding, inc. /de | 9.98M | 0.06% | 420.78K |
Top Sellers
| Holder | Shares | % Assets | Change |
|---|---|---|---|
| Capital investors | - | - | -1.42M |
| Fmr | 13.49M | 0.19% | -1.19M |
| Baillie gifford | 4.04M | 0.73% | -846.74K |
| Wellington management group llp | 4.20M | 0.18% | -756.72K |
| Logos global management lp | - | - | -500.00K |
New Positions
| Holder | Shares | % Assets | Change | Value |
|---|---|---|---|---|
| Norges bank | 2.46M | 0.08% | 2.46M | $577.94M |
| Holocene advisors, lp | 596.82K | 0.47% | 596.82K | $194.62M |
| Bank of america corp /de/ | 83.50K | 0.00% | 83.50K | $20.29M |
| Kynam capital management, lp | 43.00K | 0.81% | 43.00K | $10.45M |
| Fjarde ap-fonden (the fourth swedish national pensionfund) | 28.41K | 0.08% | 28.41K | $6.91M |
Sold Out
| Holder | Change |
|---|---|
| Bear mountain capital | -1.00 |
| Financial gravity asset management | -1.00 |
| Johnson financial group | -1.00 |
| Salem investment counselors | -1.00 |
| Halbert hargrove global advisors | -1.00 |
Institutional Ownership Trends
| Date | Holdings | Change % | Shares | Change % | Ownership | Change % | Increased Position | Change % | Decreased Position | Change % |
|---|---|---|---|---|---|---|---|---|---|---|
| Jun 30, 2025 | 685 | 2.09% | 133,478,551 | 3.70% | 102 | 1.04% | 354 | 1.14% | 220 | 10.00% |
| Mar 31, 2025 | 28 | -95.52% | 1,770,848 | -98.63% | 1 | 0.01% | 11 | -96.63% | 10 | -94.71% |
| Dec 31, 2024 | 603 | -0.33% | 129,230,860 | 5.02% | 100 | 1.10% | 315 | -2.78% | 183 | 6.40% |
| Sep 30, 2024 | 599 | 4.17% | 123,006,457 | 2.58% | 95 | 1.07% | 320 | 10.73% | 170 | 4.94% |
| Jun 30, 2024 | 571 | 3.25% | 119,905,127 | 6.57% | 95 | 1.19% | 286 | 4.38% | 162 | 3.18% |
Top Mutual Funds Shareholders
| Holder | Shares | % Holding | Change |
|---|---|---|---|
| Capital Group Growth Fnd of Amer Comp | 10.18M | 7.81% | - |
| American Funds Growth Fund of Amer A | 10.18M | 7.81% | - |
| Vanguard US Total Market Shares ETF | 4.07M | 3.15% | 54.28K |
| Vanguard Total Stock Mkt Idx Inv | 4.10M | 3.13% | -95.47K |
| VA CollegeAmerica Amcap 529A | 3.73M | 2.89% | 658.62K |
| Capital Group New Perspective Comp | 2.93M | 2.25% | - |
| American Funds New Perspective A | 2.93M | 2.25% | - |
| Vanguard Mid Cap Index Institutional | 2.91M | 2.22% | 31.33K |
| Capital Group AMCAP Composite | 2.40M | 1.84% | - |
| American Funds AMCAP A | 2.40M | 1.84% | - |
Recent Insider Transactions
| Date | Name | Role | Activity | Value |
|---|---|---|---|---|
| Aug 18, 2025 | Garg Pushkal | EVP Chief R&D | Sell | $46.55K |
| Aug 18, 2025 | Garg Pushkal | EVP Chief R&D | Sell | $17.47K |
| Aug 18, 2025 | Garg Pushkal | EVP Chief R&D | Sell | $40.49K |
| Aug 18, 2025 | Garg Pushkal | EVP Chief R&D | Sell | $17.59K |
| Aug 18, 2025 | Garg Pushkal | EVP Chief R&D | Sell | $149.02K |
Insider Transactions Trends
| Date | Buy | Sell |
|---|---|---|
| 2025 Q3 | - | 58 |
| 2025 Q2 | - | 17 |
| 2025 Q1 | - | 152 |
| 2024 Q4 | - | 36 |
| 2024 Q3 | - | 16 |
ALNY Ownership FAQ
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