Altimmune, Inc.
ALT- Exchange
- Nasdaq
- Industry
- Pharmaceutical Preparations
- SEC CIK
- 0001326190
In the last 90 days, Altimmune, Inc. insiders filed 1 open-market purchase and 0 sales; 210 institutions reported holding it in 13F filings for Q2 2026, worth $456.1M in total; Viking Global Investors is the only superinvestor holding it.
13F holders, Q2 2026
Institutional positions in Altimmune, Inc. as of Jun 30, 2026. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works
- Institutional holders
- 210
- +40 vs. Q1 2026
- Shares held
- 150.0M
- +80.7M (+116.4%) vs. Q1 2026
- Total value
- $456.1M
- +$242.7M (+113.7%) vs. Q1 2026
- New holders
- 58
- 86 more added
- Sold out
- 18
- 33 more reduced
3 institutions that held it in Q1 2026 haven't filed for Q2 2026 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q1 2026: new holders, sold out and not filed yet
Holders and value by quarter
Institutions reporting ALT on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.
| Quarter | Holders | Value |
|---|---|---|
| Q2 2026 | 210 | $456.1M |
| Q1 2026 | 173 | $213.5M |
| Q4 2025 | 183 | $198.8M |
| Q3 2025 | 159 | $156.4M |
| Q2 2025 | 180 | $145.5M |
| Q1 2025 | 177 | $191.2M |
| Q4 2024 | 183 | $292.3M |
| Q3 2024 | 169 | $243.0M |
| Q2 2024 | 173 | $282.1M |
| Q1 2024 | 171 | $452.2M |
| Q4 2023 | 143 | $377.1M |
| Q3 2023 | 113 | $79.2M |
| Q2 2023 | 120 | $124.5M |
| Q1 2023 | 133 | $205.4M |
| Q4 2022 | 128 | $769.9M |
| Q3 2022 | 122 | $588.1M |
| Q2 2022 | 111 | $466.9M |
| Q1 2022 | 103 | $207.4M |
| Q4 2021 | 102 | $295.8M |
| Q3 2021 | 119 | $375.3M |
| Q2 2021 | 109 | $269.2M |
| Q1 2021 | 98 | $336.5M |
Institutions, Q2 2026
Shares, value and share of portfolio for each institution holding Altimmune, Inc.; share changes are against Q1 2026.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| RMG Wealth Management LLC | 225 | $659 | 0.00% | +225 | New |
| True Wealth Design, LLC | 196 | $596 | 0.00% | +196 | New |
| Bare Financial Services, Inc | 196 | $596 | 0.00% | +196 | New |
| GAMMA Investing LLC | 134 | $407 | 0.00% | +134 | New |
| Harbour Investments, Inc. | 100 | $304 | 0.00% | 00.0% | Unchanged |
| Parallel Advisors, LLC | 40 | $122 | 0.00% | 00.0% | Unchanged |
| Bernard Wealth Management Corp. | 15 | $46 | 0.00% | 00.0% | Unchanged |
| First Horizon Corp | 3 | $9 | 0.00% | 00.0% | Unchanged |
| Huntington National Bank | 2 | $6 | 0.00% | 00.0% | Unchanged |
| Commonwealth Retirement Investments LLC | 1 | $3 | 0.00% | +1 | New |
| Alyeska Investment Group, L.P. | 0 | $0 | 0.00% | −2,644,600−100.0% | Sold out |
| Schroder Investment Management Group | 0 | $0 | 0.00% | −667,837−100.0% | Sold out |
| Virtu Financial LLC | 0 | $0 | 0.00% | −70,540−100.0% | Sold out |
| American Century Companies Inc | 0 | $0 | 0.00% | −62,909−100.0% | Sold out |
| ExodusPoint Capital Management, LP | 0 | $0 | 0.00% | −48,619−100.0% | Sold out |
| Farallon Capital Management, L.L.C. | 0 | $0 | 0.00% | −27,600−100.0% | Sold out |
| Simplex Trading, LLC | 0 | $0 | 0.00% | −22,841−100.0% | Sold out |
| Scientech Research LLC | 0 | $0 | 0.00% | −21,840−100.0% | Sold out |
| Keudell/Morrison Wealth Management | 0 | $0 | 0.00% | −18,500−100.0% | Sold out |
| Nine Masts Capital Ltd | 0 | $0 | 0.00% | −11,850−100.0% | Sold out |
| Quantinno Capital Management LP | 0 | $0 | 0.00% | −10,636−100.0% | Sold out |
| IMC-Chicago, LLC | 0 | $0 | 0.00% | −10,004−100.0% | Sold out |
| Acadian Asset Management LLC | 0 | $0 | 0.00% | −7,311−100.0% | Sold out |
| Group One Trading, L.P. | 0 | $0 | 0.00% | −6,695−100.0% | Sold out |
| US Bancorp | 0 | $0 | 0.00% | −890−100.0% | Sold out |
| Legacy Wealth Managment, LLC | 0 | $0 | 0.00% | −250−100.0% | Sold out |
| MAI Capital Management | 0 | $0 | 0.00% | −150−100.0% | Sold out |
| Larson Financial Group LLC | 0 | $0 | 0.00% | −5−100.0% | Sold out |
| Northeast Financial Group, Inc. | – | – | – | – | Not filed |
| Sunbelt Securities, Inc. | – | – | – | – | Not filed |
| CWM, LLC | – | – | – | – | Not filed |