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 14.52% 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 | 77.84% | 0.40% | 21.75% |
| Sector | Healthcare Stocks | 35.74% | 11.83% | 52.43% |
| Industry | Biotech Stocks | 36.05% | 11.82% | 52.13% |
Institutional Shareholders
Top Institutional Shareholders by Total Shares
| Holder | Shares | % Holding | Value |
|---|---|---|---|
| Blackrock funding, inc. /de | 12.80M | 14.52% | $39.41M |
| Vanguard group | 9.49M | 10.61% | $34.26M |
| State street | 7.15M | 8.11% | $22.01M |
| 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 | 2.33M | 2.65% | $7.19M |
| Two sigma advisers, lp | 1.43M | 1.75% | $5.39M |
Top Institutional Shareholders by % of Total Assets
| Holder | Shares | % Assets | Value |
|---|---|---|---|
| Beirne wealth consulting services | 411.86K | 0.36% | $1.27M |
| Knoll capital management | 160.00K | 0.27% | $492.80K |
| Brown wealth management | 236.14K | 0.19% | $727.30K |
| Wealth effects | 131.95K | 0.14% | $406.41K |
| Tang capital management | 666.02K | 0.10% | $2.05M |
| Mangrove partners | 239.28K | 0.06% | $736.98K |
| Scientech research | 21.84K | 0.06% | $67.27K |
| Summit financial wealth advisors | 103.29K | 0.05% | $372.87K |
| Virtus investment advisers | 51.74K | 0.04% | $159.37K |
| Sherbrooke park advisers | 15.90K | 0.03% | $59.96K |
Top Buyers
| Holder | Shares | % Assets | Change |
|---|---|---|---|
| Vanguard group | 9.49M | 0.00% | 3.12M |
| Marshall wace, llp | 4.02M | 0.01% | 3.10M |
| Blackrock funding, inc. /de | 12.80M | 0.00% | 3.09M |
| Millennium management | 3.26M | 0.00% | 3.05M |
| Alyeska investment group | 2.64M | 0.02% | 2.64M |
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 |
| American century companies | 62.91K | 0.00% | 62.91K | $193.76K |
| Vanguard global advisers | 42.83K | 0.00% | 42.83K | $131.90K |
Sold Out
| Holder | Change |
|---|---|
| Commonwealth retirement investments | -1.00 |
| Cornerstone planning group | -1.00 |
| Capital performance advisors llp | -11.00 |
| Twin peaks wealth advisors | -13.00 |
| Tradewinds capital management | -20.00 |
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 |
|---|---|---|---|
| Vanguard US Total Market Shares ETF | 2.58M | 3.36% | - |
| Vanguard Total Stock Mkt Idx Inv | 6.18M | 3.18% | 2.08M |
| State Street® SPDR® S&P® Biotech ETF | 4.72M | 2.43% | -47.90K |
| iShares Russell 2000 ETF | 3.02M | 1.55% | 25.47K |
| SPDR® S&P Biotech ETF | 1.24M | 1.41% | 2.77K |
| Vanguard Institutional Extnd Mkt Idx Tr | 2.14M | 1.10% | 720.84K |
| CT (Lux) American Smaller Com 9U USD | 830.56K | 1.08% | -2.54M |
| Nuveen Quant Small Cap Equity R6 | 1.89M | 0.97% | 449.40K |
| Vanguard Strategic Equity Inv | 1.83M | 0.94% | 262.72K |
| Bellevue Healthcare Ord | 600.00K | 0.84% | 600.00K |
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
Try Tickergate Pro Free
Customize Everything. 100% Flexibility. Fast and Easy to Use (No code or Excel Needed)
Customize your own personal stocks lists, views and charts
Choose from hundreds of fields, up to 15 years of history
Conduct deep comparison analysis
Discover trending investment themes
Find your next best investment
Research stocks using tools