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, Q1 2026
Institutional positions in Altimmune, Inc. as of Mar 31, 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
- 173
- −5 vs. Q4 2025
- Shares held
- 69.4M
- +23.8M (+52.3%) vs. Q4 2025
- Total value
- $213.5M
- +$49.0M (+29.8%) vs. Q4 2025
- New holders
- 30
- 82 more added
- Sold out
- 35
- 34 more reduced
5 institutions that held it in Q4 2025 haven't filed for Q1 2026 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q4 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, Q1 2026
Shares, value and share of portfolio for each institution holding Altimmune, Inc.; share changes are against Q4 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Scientech Research LLC | 21,840 | $67.3K | 0.06% | +21,840 | New |
| Prudential Financial Inc | 21,790 | $67.1K | 0.00% | +21,790 | New |
| New York State Common Retirement Fund | 21,447 | $66.1K | 0.00% | 00.0% | Unchanged |
| Voya Investment Management LLC | 21,011 | $64.7K | 0.00% | +7,321+53.5% | Added |
| Advisor Group Holdings, Inc. | 20,678 | $63.7K | 0.00% | +1,737+9.2% | Added |
| Vontobel Holding Ltd. | 20,000 | $61.6K | 0.00% | +5,000+33.3% | Added |
| Vines Capital Management, LLC | 18,884 | $58.2K | 0.06% | +1,000+5.6% | Added |
| Keudell/Morrison Wealth Management | 18,500 | $57.0K | 0.01% | 00.0% | Unchanged |
| Squarepoint Ops LLC | 18,126 | $55.8K | 0.00% | −16,823−48.1% | Reduced |
| Caitong International Asset Management Co., Ltd | 17,217 | $53.0K | 0.01% | +15,293+794.9% | Added |
| Miracle Mile Advisors, LLC | 17,000 | $52.4K | 0.00% | −20−0.1% | Reduced |
| North Star Investment Management Corp. | 17,000 | $52.4K | 0.00% | +9,000+112.5% | Added |
| RSM US Wealth Management LLC | 16,691 | $51.4K | 0.00% | +16,691 | New |
| EFG International AG | 16,500 | $50.8K | 0.00% | 00.0% | Unchanged |
| Russell Investments Group, Ltd. | 16,092 | $49.6K | 0.00% | +1,555+10.7% | Added |
| Advisory Services Network, LLC | 15,260 | $47.0K | 0.00% | +100+0.7% | Added |
| Victory Capital Management Inc | 14,763 | $45.5K | 0.00% | +2,833+23.7% | Added |
| DCF Advisers, LLC | 14,700 | $45.3K | 0.02% | −4,000−21.4% | Reduced |
| Tower Research Capital LLC (TRC) | 14,488 | $44.6K | 0.00% | +6,299+76.9% | Added |
| Martingale Asset Management L P | 14,355 | $44.2K | 0.00% | 00.0% | Unchanged |
| Northeast Financial Group, Inc. | 13,641 | $42.0K | 0.01% | +248+1.9% | Added |
| PFG Investments, LLC | 13,500 | $41.6K | 0.00% | +13,500 | New |
| Smith, Moore & Co. | 13,205 | $40.7K | 0.00% | +13,205 | New |
| Nine Masts Capital Ltd | 11,850 | $36.5K | 0.01% | +11,850 | New |
| Legal & General Group Plc | 11,496 | $35.4K | 0.00% | +2,134+22.8% | Added |
| Cambridge Investment Research Advisors, Inc. | 11,206 | $35.0K | 0.00% | +11,206 | New |
| Foundations Investment Advisors, LLC | 11,052 | $34.0K | 0.00% | +11,052 | New |
| Sunbelt Securities, Inc. | 10,870 | $33.5K | 0.00% | +26+0.2% | Added |
| Xponance, Inc. | 10,783 | $33.2K | 0.00% | +10,783 | New |
| Ameritas Investment Partners, Inc. | 10,680 | $32.9K | 0.00% | +3,725+53.6% | Added |
| Quantinno Capital Management LP | 10,636 | $32.8K | 0.00% | +10,636 | New |
| Change Path, LLC | 10,500 | $32.3K | 0.00% | 00.0% | Unchanged |
| JustInvest LLC | 10,127 | $31.2K | 0.00% | +10,127 | New |
| IMC-Chicago, LLC | 10,004 | $30.8K | 0.00% | −163,126−94.2% | Reduced |
| Geneos Wealth Management Inc. | 10,000 | $30.8K | 0.00% | 00.0% | Unchanged |
| SBI Securities Co., Ltd. | 8,313 | $25.6K | 0.00% | −524−5.9% | Reduced |
| Acadian Asset Management LLC | 7,311 | $22.0K | 0.00% | −28,421−79.5% | Reduced |
| California State Teachers Retirement System | 7,124 | $21.9K | 0.00% | +1,663+30.5% | Added |
| Group One Trading, L.P. | 6,695 | $20.6K | 0.00% | −24,677−78.7% | Reduced |
| Mirae Asset Global Investments Co., Ltd. | 6,532 | $20.1K | 0.00% | +1,462+28.8% | Added |
| Activest Wealth Management | 5,001 | $15.4K | 0.00% | 00.0% | Unchanged |
| CWM, LLC | 4,519 | $13.9K | 0.00% | +1,437+46.6% | Added |
| UBS Asset Management Americas Inc | 4,154 | $12.8K | 0.00% | +3,482+518.2% | Added |
| Optiver Holding B.V. | 3,858 | $11.9K | 0.00% | +3,858 | New |
| Bellevue Asset Management, LLC | 2,433 | $7.49K | 0.00% | +2,433 | New |
| GF Fund Management Co. Ltd. | 2,331 | $7.18K | 0.00% | +282+13.8% | Added |
| HighMark Wealth Management LLC | 2,000 | $6.16K | 0.00% | 00.0% | Unchanged |
| GWM Advisors LLC | 1,888 | $5.82K | 0.00% | 00.0% | Unchanged |
| The PNC Financial Services Group, Inc. | 1,552 | $4.78K | 0.00% | −860−35.7% | Reduced |
| Massmutual Trust Co FSB | 1,000 | $3.08K | 0.00% | +82+8.9% | Added |
| US Bancorp | 890 | $2.74K | 0.00% | +331+59.2% | Added |
| Sterling Capital Management LLC | 847 | $2.61K | 0.00% | +317+59.8% | Added |
| Stone House Investment Management, LLC | 526 | $1.62K | 0.00% | +26+5.2% | Added |
| SRS Capital Advisors, Inc. | 339 | $1.04K | 0.00% | −7,826−95.8% | Reduced |
| Bogart Wealth, LLC | 298 | $918 | 0.00% | +298 | New |
| ZRC Wealth Management, LLC | 286 | $881 | 0.00% | 00.0% | Unchanged |
| Legacy Wealth Managment, LLC | 250 | $770 | 0.00% | 00.0% | Unchanged |
| MAI Capital Management | 150 | $462 | 0.00% | 00.0% | Unchanged |
| Farther Finance Advisors, LLC | 141 | $440 | 0.00% | +68+93.2% | Added |
| Northwestern Mutual Wealth Management Co | 100 | $308 | 0.00% | 00.0% | Unchanged |
| Harbour Investments, Inc. | 100 | $308 | 0.00% | +100 | New |
| Nisa Investment Advisors, LLC | 95 | $293 | 0.00% | 00.0% | Unchanged |
| Allworth Financial LP | 70 | $216 | 0.00% | −19−21.3% | Reduced |
| Parallel Advisors, LLC | 40 | $123 | 0.00% | 00.0% | Unchanged |
| Clearstead Advisors, LLC | 40 | $122 | 0.00% | 00.0% | Unchanged |
| Essential Partners LLC | 27 | $83 | 0.00% | +27 | New |
| SJS Investment Consulting Inc. | 16 | $50 | 0.00% | +16 | New |
| Bernard Wealth Management Corp. | 15 | $47 | 0.00% | 00.0% | Unchanged |
| Rothschild Investment LLC | 13 | $40 | 0.00% | +12+1,200.0% | Added |
| Larson Financial Group LLC | 5 | $15 | 0.00% | −5,301−99.9% | Reduced |
| First Horizon Corp | 3 | $9 | 0.00% | 00.0% | Unchanged |
| Walleye Capital LLC | 2 | $6 | 0.00% | −65,663−100.0% | Reduced |
| Huntington National Bank | 2 | $6 | 0.00% | 00.0% | Unchanged |
| Jane Street Group, LLC | 0 | $0 | 0.00% | −1,783,950−100.0% | Sold out |
| Two Sigma Advisers, LP | 0 | $0 | 0.00% | −793,900−100.0% | Sold out |
| Soviero Asset Management, LP | 0 | $0 | 0.00% | −400,000−100.0% | Sold out |
| Sculptor Capital LP | 0 | $0 | 0.00% | −276,700−100.0% | Sold out |
| Jump Financial, LLC | 0 | $0 | 0.00% | −242,017−100.0% | Sold out |
| Pavaki Capital Management LLC | 0 | $0 | 0.00% | −215,400−100.0% | Sold out |
| Los Angeles Capital Management LLC | 0 | $0 | 0.00% | −128,529−100.0% | Sold out |
| Susquehanna Portfolio Strategies, LLC | 0 | $0 | 0.00% | −135,170−100.0% | Sold out |
| Jacobs Levy Equity Management, Inc | 0 | $0 | 0.00% | −124,821−100.0% | Sold out |
| Verition Fund Management LLC | 0 | $0 | 0.00% | −69,476−100.0% | Sold out |
| LMR Partners LLP | 0 | $0 | 0.00% | −61,300−100.0% | Sold out |
| Balyasny Asset Management LLC | 0 | $0 | 0.00% | −60,109−100.0% | Sold out |
| Bridgeway Capital Management, LLC | 0 | $0 | 0.00% | −50,600−100.0% | Sold out |
| Fox Run Management, L.L.C. | 0 | $0 | 0.00% | −30,603−100.0% | Sold out |
| DRW Securities, LLC | 0 | $0 | 0.00% | −22,469−100.0% | Sold out |
| Quest Partners LLC | 0 | $0 | 0.00% | −19,820−100.0% | Sold out |
| PKS Advisory Services, LLC | 0 | $0 | 0.00% | −15,100−100.0% | Sold out |
| Wiley Bros.-Aintree Capital, LLC | 0 | $0 | 0.00% | −15,035−100.0% | Sold out |
| National Asset Management, Inc. | 0 | $0 | 0.00% | −13,955−100.0% | Sold out |
| Schonfeld Strategic Advisors LLC | 0 | $0 | 0.00% | −13,021−100.0% | Sold out |
| Gotham Asset Management, LLC | 0 | $0 | 0.00% | −12,669−100.0% | Sold out |
| Sequoia Financial Advisors, LLC | 0 | $0 | 0.00% | −12,428−100.0% | Sold out |
| Two Sigma Securities, LLC | 0 | $0 | 0.00% | −12,274−100.0% | Sold out |
| Quadrature Capital Ltd | 0 | $0 | 0.00% | −10,101−100.0% | Sold out |
| TD Waterhouse Canada Inc. | 0 | $0 | 0.00% | −3,500−100.0% | Sold out |
| Amalgamated Bank | 0 | $0 | 0.00% | −2,786−100.0% | Sold out |
| Zurcher Kantonalbank (Zurich Cantonalbank) | 0 | $0 | 0.00% | −1,125−100.0% | Sold out |