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 2025
Institutional positions in Altimmune, Inc. as of Jun 30, 2025. 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
- 180
- +4 vs. Q1 2025
- Shares held
- 37.6M
- −579.0K (−1.5%) vs. Q1 2025
- Total value
- $145.5M
- −$45.7M (−23.9%) vs. Q1 2025
- New holders
- 38
- 72 more added
- Sold out
- 34
- 39 more reduced
1 institution that held it in Q1 2025 haven't filed for Q2 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q1 2025: 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 2025
Shares, value and share of portfolio for each institution holding Altimmune, Inc.; share changes are against Q1 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| KLP Kapitalforvaltning AS | 0 | $0 | 0.00% | −11,300−100.0% | Sold out |
| Sequoia Financial Advisors, LLC | 0 | $0 | 0.00% | −10,155−100.0% | Sold out |
| Headland Capital, LLC | 0 | $0 | 0.00% | −10,097−100.0% | Sold out |
| Cullen/Frost Bankers, Inc. | 0 | $0 | 0.00% | −10,000−100.0% | Sold out |
| Magnus Financial Group LLC | 0 | $0 | 0.00% | −10,000−100.0% | Sold out |
| Great West Life Assurance Co | 0 | $0 | 0.00% | −4,354−100.0% | Sold out |
| Amundi | 0 | $0 | 0.00% | −3,273−100.0% | Sold out |
| Penserra Capital Management LLC | 0 | $0 | 0.00% | −1,587−100.0% | Sold out |
| Public Employees Retirement Association of Colorado | 0 | $0 | 0.00% | −552−100.0% | Sold out |
| Medallion Wealth Advisors, LLC | 0 | $0 | 0.00% | −435−100.0% | Sold out |
| Optiver Holding B.V. | 0 | $0 | 0.00% | −247−100.0% | Sold out |
| Massmutual Trust Co FSB | 0 | $0 | 0.00% | −240−100.0% | Sold out |
| Aventura Private Wealth, LLC | 0 | $0 | 0.00% | −200−100.0% | Sold out |
| Stephens Consulting, LLC | 0 | $0 | 0.00% | −65−100.0% | Sold out |
| Lindbrook Capital, LLC | – | – | – | – | Not filed |