Alnylam Pharmaceuticals Ownership | Who Owns Alnylam Pharmaceuticals?
Alnylam Pharmaceuticals Ownership Summary
Alnylam Pharmaceuticals is owned by 1.37% institutional investors, 3.84% insiders, and 94.80% retail investors. Capital world investors is the largest institutional shareholder, holding 12.91% of ALNY shares. American Funds Growth Fund of Amer A is the top mutual fund, with 7.87% of its assets in Alnylam Pharmaceuticals shares.
ALNY Ownership Benchmark
| Type | Name | % Inst | % Insiders | % Retail |
|---|---|---|---|---|
| Stock | Alnylam Pharmaceuticals | 1.37% | 3.84% | 94.80% |
| Sector | Healthcare Stocks | 279.18% | 10.62% | -189.80% |
| Industry | Biotech Stocks | 63.96% | 10.74% | 25.30% |
Institutional Shareholders
Top Institutional Shareholders by Total Shares
| Holder | Shares | % Holding | Value |
|---|---|---|---|
| Capital world investors | 16.60M | 12.91% | $3.91B |
| Fmr | 13.49M | 10.49% | $3.17B |
| Vanguard group | 12.73M | 9.90% | $3.00B |
| Blackrock funding, inc. /de | 9.89M | 7.69% | $2.33B |
| Blackrock | 9.55M | 7.57% | $2.32B |
| Capital research global investors | 6.97M | 5.42% | $1.64B |
| Regeneron pharmaceuticals | 4.44M | 3.46% | $1.05B |
| T. rowe price investment management | 4.38M | 3.41% | $1.03B |
| 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 | 95.54% | $1.05B |
| Bridger management | 41.18K | 5.21% | $9.69M |
| Eagle health investments lp | 76.26K | 4.40% | $17.94M |
| Palo alto investors lp | 83.49K | 4.29% | $22.54M |
| Bellevue group | 770.27K | 3.49% | $181.25M |
| Sofinnova investments | 176.18K | 3.11% | $47.57M |
| Casdin capital | 120.00K | 2.65% | $32.40M |
| Rock springs capital management lp | 256.20K | 2.30% | $60.29M |
| 683 capital management | 122.90K | 2.26% | $29.86M |
| Orbimed advisors | 346.10K | 2.23% | $93.45M |
Top Buyers
| Holder | Shares | % Assets | Change |
|---|---|---|---|
| Regeneron pharmaceuticals | 4.44M | 95.54% | 4.44M |
| Norges bank | 2.46M | 0.08% | 2.46M |
| Capital research global investors | 6.97M | 0.34% | 1.72M |
| T. rowe price investment management | 4.38M | 0.64% | 1.25M |
| Blackrock | 9.55M | 0.05% | 522.66K |
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 |
|---|---|---|---|---|
| Regeneron pharmaceuticals | 4.44M | 95.54% | 4.44M | $1.05B |
| Norges bank | 2.46M | 0.08% | 2.46M | $577.94M |
| Raymond james financial | 277.49K | 0.02% | 277.49K | $65.30M |
| Jennison associates | 259.91K | 0.04% | 259.91K | $61.16M |
| Westfield capital management co lp | 216.13K | 0.22% | 216.13K | $50.86M |
Sold Out
| Holder | Change |
|---|---|
| Salem investment counselors | -1.00 |
| Johnson financial group | -1.00 |
| Activest wealth management | -1.00 |
| Financial gravity asset management | -1.00 |
| Kohmann bosshard financial services | -1.00 |
Institutional Ownership Trends
| Date | Holdings | Change % | Shares | Change % | Ownership | Change % | Increased Position | Change % | Decreased Position | Change % |
|---|---|---|---|---|---|---|---|---|---|---|
| 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% |
| Mar 31, 2024 | 553 | 3.56% | 112,509,382 | -3.80% | 89 | 1.02% | 274 | 3.40% | 157 | 1.95% |
Top Mutual Funds Shareholders
| Holder | Shares | % Holding | Change |
|---|---|---|---|
| American Funds Growth Fund of Amer A | 10.18M | 7.87% | -387.23K |
| Capital Group Growth Fnd of Amer Comp | 10.18M | 7.87% | -387.23K |
| Vanguard Total Stock Mkt Idx Inv | 4.15M | 3.18% | 54.00K |
| Vanguard US Total Market Shares ETF | 4.07M | 3.15% | 54.28K |
| VA CollegeAmerica Amcap 529A | 3.73M | 2.89% | 658.62K |
| Capital Group New Perspective Comp | 2.93M | 2.26% | -4.07K |
| American Funds New Perspective A | 2.93M | 2.26% | -4.07K |
| Vanguard Mid Cap Index Institutional | 2.81M | 2.16% | 27.04K |
| Capital Group AMCAP Composite | 2.40M | 1.86% | -1.33M |
| American Funds AMCAP A | 2.40M | 1.86% | -1.33M |
Recent Insider Transactions
| Date | Name | Role | Activity | Value |
|---|---|---|---|---|
| Jun 02, 2025 | Greenstreet Yvonne | Chief Executive Officer | Sell | $5.90M |
| May 30, 2025 | Greenstreet Yvonne | Chief Executive Officer | Sell | $7.74M |
| May 15, 2025 | BONNEY MICHAEL W | - | Sell | $195.78K |
| May 15, 2025 | BONNEY MICHAEL W | - | Sell | $146.66K |
| May 15, 2025 | BONNEY MICHAEL W | - | Sell | $66.10K |
Insider Transactions Trends
| Date | Buy | Sell |
|---|---|---|
| 2025 Q2 | - | 17 |
| 2025 Q1 | - | 152 |
| 2024 Q4 | - | 36 |
| 2024 Q3 | - | 16 |
| 2024 Q2 | - | 67 |
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