Altimmune Ownership | Who Owns Altimmune?
Altimmune Ownership Summary
Altimmune is owned by 12.78% institutional investors, 0.71% insiders, and 86.50% retail investors. Blackrock funding, inc. /de is the largest institutional shareholder, holding 10.85% of ALT shares. Vanguard US Total Market Shares ETF is the top mutual fund, with 3.36% of its assets in Altimmune shares.
ALT Ownership Benchmark
| Type | Name | % Inst | % Insiders | % Retail |
|---|---|---|---|---|
| Stock | Altimmune | 12.78% | 0.71% | 86.50% |
| Sector | Healthcare Stocks | 232.01% | 10.74% | -142.75% |
| Industry | Biotech Stocks | 381.47% | 10.55% | -292.02% |
Institutional Shareholders
Top Institutional Shareholders by Total Shares
| Holder | Shares | % Holding | Value |
|---|---|---|---|
| Blackrock funding, inc. /de | 9.70M | 10.85% | $35.03M |
| Vanguard group | 9.49M | 10.61% | $34.26M |
| State street | 3.60M | 4.42% | $13.58M |
| Tang capital management | 2.13M | 2.62% | $8.04M |
| Geode capital management | 2.29M | 2.56% | $8.28M |
| Two sigma investments, lp | 2.00M | 2.45% | $7.53M |
| Jane street group | 1.78M | 2.00% | $6.44M |
| Two sigma advisers, lp | 1.43M | 1.75% | $5.39M |
| Morgan stanley | 1.36M | 1.52% | $4.91M |
| Goldman sachs group | 1.35M | 1.51% | $4.87M |
Top Institutional Shareholders by % of Total Assets
| Holder | Shares | % Assets | Value |
|---|---|---|---|
| Knoll capital management | 1.12M | 2.27% | $4.23M |
| Beirne wealth consulting services | 376.46K | 0.39% | $1.36M |
| Tang capital management | 2.13M | 0.31% | $8.04M |
| Brown wealth management | 258.67K | 0.25% | $933.81K |
| Wealth effects | 111.75K | 0.13% | $403.42K |
| Caitong asset management | 12.32K | 0.12% | $44.48K |
| Summit financial wealth advisors | 103.29K | 0.05% | $372.87K |
| Sherbrooke park advisers | 15.90K | 0.03% | $59.96K |
| Hennion & walsh asset management | 214.63K | 0.03% | $774.82K |
| Axq capital, lp | 25.70K | 0.02% | $92.78K |
Top Buyers
| Holder | Shares | % Assets | Change |
|---|---|---|---|
| Blackrock funding, inc. /de | 9.70M | 0.00% | 3.33M |
| Vanguard group | 9.49M | 0.00% | 3.12M |
| Two sigma investments, lp | 2.00M | 0.01% | 1.56M |
| Jane street group | 1.78M | 0.00% | 1.50M |
| Two sigma advisers, lp | 1.43M | 0.01% | 1.30M |
Top Sellers
| Holder | Shares | % Assets | Change |
|---|---|---|---|
| Bellevue group | - | - | -1.06M |
| Schroder investment management group | - | - | -961.88K |
| Caption management | 130.00K | 0.00% | -850.78K |
| Capital fund management | - | - | -726.83K |
| Tang capital management | 2.13M | 0.31% | -618.69K |
New Positions
| Holder | Shares | % Assets | Change | Value |
|---|---|---|---|---|
| Point72 asset management | 476.93K | 0.00% | 476.93K | $1.80M |
| Jump financial | 115.80K | 0.01% | 115.80K | $436.57K |
| Alps advisors | 85.68K | 0.00% | 85.68K | $309.29K |
| Bridgeway capital management | 50.60K | 0.00% | 50.60K | $190.76K |
| Engineers gate manager lp | 41.04K | 0.00% | 41.04K | $154.73K |
Sold Out
| Holder | Change |
|---|---|
| Capital performance advisors llp | -11.00 |
| Twin peaks wealth advisors | -13.00 |
| Tradewinds capital management | -20.00 |
| Principal securities | -35.00 |
| Quantbot technologies lp | -60.00 |
Institutional Ownership Trends
| Date | Holdings | Change % | Shares | Change % | Ownership | Change % | Increased Position | Change % | Decreased Position | Change % |
|---|---|---|---|---|---|---|---|---|---|---|
| Dec 31, 2025 | 50 | -72.38% | 11,431,385 | -72.45% | 12 | 0.49% | 32 | -63.22% | 4 | -91.67% |
| Sep 30, 2025 | 62 | -69.46% | 8,979,026 | -74.79% | 11 | 0.58% | 26 | -77.39% | 19 | -50.00% |
| Jun 30, 2025 | 207 | 7.81% | 37,429,392 | -1.85% | 45 | 1.80% | 115 | 40.24% | 39 | -29.09% |
| Mar 31, 2025 | 7 | -96.55% | 2,264,429 | -94.40% | 2 | 0.09% | 2 | -98.15% | 2 | -95.12% |
| Dec 31, 2024 | 197 | 8.84% | 39,287,627 | -0.54% | 55 | 1.79% | 104 | 25.30% | 41 | -4.65% |
Top Mutual Funds Shareholders
| Holder | Shares | % Holding | Change |
|---|---|---|---|
| Vanguard US Total Market Shares ETF | 2.58M | 3.36% | - |
| State Street® SPDR® S&P® Biotech ETF | 3.36M | 2.68% | -18.06K |
| Vanguard Total Stock Mkt Idx Inv | 3.28M | 2.62% | - |
| iShares Russell 2000 ETF | 2.11M | 1.69% | 2.11M |
| SPDR® S&P Biotech ETF | 1.24M | 1.41% | 2.77K |
| Vanguard Strategic Equity Inv | 1.57M | 1.26% | 578.46K |
| CT (Lux) American Smaller Com 9U USD | 830.56K | 1.08% | -2.54M |
| Vanguard Institutional Extnd Mkt Idx Tr | 1.15M | 0.92% | 5.92K |
| Bellevue Healthcare Ord | 600.00K | 0.84% | 600.00K |
| Nuveen Quant Small Cap Equity R6 | 1.02M | 0.81% | 1.02M |
Recent Insider Transactions
| Date | Name | Role | Activity | Value |
|---|---|---|---|---|
| Mar 06, 2026 | WEAVER GREGORY L | Chief Financial Officer | Buy | $17.70K |
| Mar 06, 2026 | Durso Jerome Benedict | President and CEO | Buy | $70.79K |
| Jan 08, 2026 | Pisano Wayne | - | Buy | $20.41K |
| Jan 05, 2026 | Sohn Catherine A. | - | Buy | $2.12K |
| Dec 29, 2025 | Jorkasky Diane | - | Buy | $2.00K |
Insider Transactions Trends
| Date | Buy | Sell |
|---|---|---|
| 2026 Q1 | 2 | - |
| 2025 Q4 | 3 | - |
| 2025 Q3 | - | - |
| 2025 Q1 | 2 | - |
| 2024 Q4 | - | - |
ALT Ownership FAQ
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