Altimmune Ownership | Who Owns Altimmune?
Altimmune Ownership Summary
Altimmune is owned by 121.06% institutional investors, 0.42% insiders. Blackrock funding, inc. /de is the largest institutional shareholder, holding 16.38% of ALT shares. Vanguard MStar Total Stk Mkt Idx Invest is the top mutual fund, with 5.18% of its assets in Altimmune shares.
ALT Ownership Benchmark
| Type | Name | % Inst | % Insiders | % Retail |
|---|---|---|---|---|
| Stock | Altimmune | 121.06% | 0.42% | -21.48% |
| Sector | Healthcare Stocks | 50.51% | 12.37% | 37.12% |
| Industry | Biotech Stocks | 48.95% | 12.07% | 38.98% |
Institutional Shareholders
Top Institutional Shareholders by Total Shares
| Holder | Shares | % Holding | Value |
|---|---|---|---|
| Blackrock funding, inc. /de | 20.39M | 16.38% | $61.97M |
| Deep track capital, lp | 19.25M | 15.47% | $58.52M |
| Vanguard group | 9.49M | 10.61% | $34.26M |
| State street | 12.10M | 9.72% | $36.78M |
| Tcg crossover management | 10.00M | 8.03% | $30.40M |
| Vanguard capital management | 8.18M | 6.57% | $24.86M |
| Marshall wace, llp | 6.84M | 5.50% | $20.80M |
| Viking global investors lp | 6.70M | 5.38% | $20.37M |
| Ra capital management | 6.50M | 5.22% | $19.76M |
| Geode capital management | 5.01M | 4.03% | $15.24M |
Top Institutional Shareholders by % of Total Assets
| Holder | Shares | % Assets | Value |
|---|---|---|---|
| Great point partners | 1.74M | 1.00% | $5.29M |
| Deep track capital, lp | 19.25M | 0.85% | $58.52M |
| Tcg crossover management | 10.00M | 0.73% | $30.40M |
| Knoll capital management | 160.00K | 0.27% | $486.40K |
| Beirne wealth consulting services | 421.86K | 0.26% | $1.28M |
| Birchview capital, lp | 152.68K | 0.22% | $464.15K |
| Cormorant asset management, lp | 1.25M | 0.19% | $3.80M |
| Ra capital management | 6.50M | 0.17% | $19.76M |
| Brown wealth management | 236.14K | 0.16% | $717.85K |
| Nantahala capital management | 1.50M | 0.15% | $4.56M |
Top Buyers
| Holder | Shares | % Assets | Change |
|---|---|---|---|
| Deep track capital, lp | 19.25M | 0.85% | 19.25M |
| Tcg crossover management | 10.00M | 0.73% | 10.00M |
| Blackrock funding, inc. /de | 20.39M | 0.00% | 7.59M |
| Viking global investors lp | 6.70M | 0.06% | 6.70M |
| Ra capital management | 6.50M | 0.17% | 6.50M |
Top Sellers
| Holder | Shares | % Assets | Change |
|---|---|---|---|
| Alyeska investment group | - | - | -2.64M |
| Jane street group | - | - | -1.78M |
| Bellevue group | - | - | -1.06M |
| Capital fund management | - | - | -726.83K |
| Schroder investment management group | - | - | -667.84K |
New Positions
| Holder | Shares | % Assets | Change | Value |
|---|---|---|---|---|
| Deep track capital, lp | 19.25M | 0.85% | 19.25M | $58.52M |
| Tcg crossover management | 10.00M | 0.73% | 10.00M | $30.40M |
| Viking global investors lp | 6.70M | 0.06% | 6.70M | $20.37M |
| Ra capital management | 6.50M | 0.17% | 6.50M | $19.76M |
| Woodline partners lp | 3.40M | 0.03% | 3.40M | $10.34M |
Sold Out
| Holder | Change |
|---|---|
| Cornerstone planning group | -1.00 |
| Larson financial group | -5.00 |
| 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 % |
|---|---|---|---|---|---|---|---|---|---|---|
| Jun 30, 2026 | 219 | 19.67% | 150,674,020 | 117.20% | 121 | 1.95% | 146 | 28.07% | 33 | -2.94% |
| 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% |
Top Mutual Funds Shareholders
| Holder | Shares | % Holding | Change |
|---|---|---|---|
| Vanguard MStar Total Stk Mkt Idx Invest | 5.75M | 5.18% | - |
| 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 |
| Vanguard Institutional Extnd Mkt Idx Tr | 2.24M | 2.02% | 5.04K |
| Nuveen Quant Small Cap Equity R6 | 1.85M | 1.67% | -36.65K |
| SPDR® S&P Biotech ETF | 1.24M | 1.41% | 2.77K |
| Vanguard Strategic Equity Inv | 2.67M | 1.37% | 835.79K |
Recent Insider Transactions
| Date | Name | Role | Activity | Value |
|---|---|---|---|---|
| Aug 13, 2026 | Durso Jerome Benedict | President and CEO | Buy | $44.25K |
| 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 |
Insider Transactions Trends
| Date | Buy | Sell |
|---|---|---|
| 2026 Q3 | 1 | - |
| 2026 Q2 | 3 | - |
| 2026 Q1 | 4 | - |
| 2025 Q4 | 3 | - |
| 2025 Q3 | - | - |
ALT Ownership FAQ
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