Altimmune Ownership | Who Owns Altimmune?
Altimmune Ownership Summary
Altimmune is owned by 77.84% institutional investors, 0.40% insiders, and 21.75% retail investors. Blackrock funding, inc. /de is the largest institutional shareholder, holding 16.38% of ALT shares. State Street® SPDR® S&P® Biotech ETF is the top mutual fund, with 4.10% of its assets in Altimmune shares.
ALT Ownership Benchmark
| Type | Name | % Inst | % Insiders | % Retail |
|---|---|---|---|---|
| Stock | Altimmune | 77.84% | 0.40% | 21.75% |
| Sector | Healthcare Stocks | 35.56% | 12.08% | 52.36% |
| Industry | Biotech Stocks | 35.43% | 12.01% | 52.56% |
Institutional Shareholders
Top Institutional Shareholders by Total Shares
| Holder | Shares | % Holding | Value |
|---|---|---|---|
| Blackrock funding, inc. /de | 20.39M | 16.38% | $61.97M |
| Vanguard group | 9.49M | 10.61% | $34.26M |
| State street | 12.10M | 9.72% | $36.78M |
| Marshall wace, llp | 4.02M | 4.56% | $12.38M |
| Millennium management | 3.26M | 3.70% | $10.04M |
| Geode capital management | 3.11M | 3.53% | $9.57M |
| Alyeska investment group | 2.64M | 3.00% | $8.15M |
| Two sigma investments, lp | 2.48M | 2.81% | $7.64M |
| Nuveen | 2.41M | 1.93% | $7.31M |
| Two sigma advisers, lp | 1.43M | 1.75% | $5.39M |
Top Institutional Shareholders by % of Total Assets
| Holder | Shares | % Assets | Value |
|---|---|---|---|
| Knoll capital management | 160.00K | 0.27% | $492.80K |
| Beirne wealth consulting services | 421.86K | 0.26% | $1.28M |
| Brown wealth management | 236.14K | 0.16% | $717.85K |
| Pvg asset management | 66.12K | 0.12% | $201.00K |
| Nverses capital | 24.41K | 0.11% | $74.20K |
| Tang capital management | 666.02K | 0.10% | $2.05M |
| Wealth effects | 122.65K | 0.10% | $372.86K |
| Virtus investment advisers | 125.36K | 0.09% | $381.10K |
| Mangrove partners | 239.28K | 0.06% | $736.98K |
| Scientech research | 21.84K | 0.06% | $67.27K |
Top Buyers
| Holder | Shares | % Assets | Change |
|---|---|---|---|
| Blackrock funding, inc. /de | 20.39M | 0.00% | 7.59M |
| State street | 12.10M | 0.00% | 4.95M |
| Vanguard group | 9.49M | 0.00% | 3.12M |
| Marshall wace, llp | 4.02M | 0.01% | 3.10M |
| Millennium management | 3.26M | 0.00% | 3.05M |
Top Sellers
| Holder | Shares | % Assets | Change |
|---|---|---|---|
| Jane street group | - | - | -1.78M |
| Tang capital management | 666.02K | 0.10% | -1.47M |
| Bellevue group | - | - | -1.06M |
| Knoll capital management | 160.00K | 0.27% | -961.52K |
| Citadel advisors | 448.87K | 0.00% | -889.05K |
New Positions
| Holder | Shares | % Assets | Change | Value |
|---|---|---|---|---|
| Alyeska investment group | 2.64M | 0.02% | 2.64M | $8.15M |
| Vanguard fiduciary trust | 869.32K | 0.00% | 869.32K | $2.68M |
| Mangrove partners | 239.28K | 0.06% | 239.28K | $736.98K |
| Ieq capital | 66.95K | 0.00% | 66.95K | $203.54K |
| American century companies | 62.91K | 0.00% | 62.91K | $193.76K |
Sold Out
| Holder | Change |
|---|---|
| Cornerstone planning group | -1.00 |
| Capital performance advisors llp | -11.00 |
| Twin peaks wealth advisors | -13.00 |
| Tradewinds capital management | -20.00 |
| Principal securities | -35.00 |
Institutional Ownership Trends
| Date | Holdings | Change % | Shares | Change % | Ownership | Change % | Increased Position | Change % | Decreased Position | Change % |
|---|---|---|---|---|---|---|---|---|---|---|
| Mar 31, 2026 | 176 | -12.44% | 68,583,096 | 25.05% | 77 | 2.07% | 107 | -10.08% | 35 | 12.90% |
| 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% |
Top Mutual Funds Shareholders
| Holder | Shares | % Holding | Change |
|---|---|---|---|
| State Street® SPDR® S&P® Biotech ETF | 7.97M | 4.10% | 18.31K |
| Vanguard US Total Market Shares ETF | 2.58M | 3.36% | - |
| Vanguard Morn Total Stk Mkt Idx Investor | 5.75M | 2.96% | -434.30K |
| Vanguard Total Stock Mkt Idx Inv | 5.75M | 2.96% | -434.30K |
| iShares Russell 2000 ETF | 5.05M | 2.60% | -89.66K |
| SPDR® S&P Biotech ETF | 1.24M | 1.41% | 2.77K |
| Vanguard Strategic Equity Inv | 2.67M | 1.37% | 835.79K |
| Vanguard Institutional Extnd Mkt Idx Tr | 2.24M | 1.15% | 95.65K |
| CT (Lux) American Smaller Com 9U USD | 830.56K | 1.08% | -2.54M |
| Nuveen Quant Small Cap Equity R6 | 1.89M | 0.97% | - |
Recent Insider Transactions
| Date | Name | Role | Activity | Value |
|---|---|---|---|---|
| Apr 06, 2026 | GILL JOHN | - | Buy | $31.35K |
| Apr 01, 2026 | WEAVER GREGORY L | Chief Financial Officer | Buy | $31.50K |
| Apr 01, 2026 | Durso Jerome Benedict | President and CEO | Buy | $47.10K |
| Mar 06, 2026 | WEAVER GREGORY L | Chief Financial Officer | Buy | $17.70K |
| Mar 06, 2026 | Durso Jerome Benedict | President and CEO | Buy | $70.79K |
Insider Transactions Trends
| Date | Buy | Sell |
|---|---|---|
| 2026 Q2 | 3 | - |
| 2026 Q1 | 4 | - |
| 2025 Q4 | 3 | - |
| 2025 Q3 | - | - |
| 2025 Q1 | 2 | - |
ALT Ownership FAQ
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