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 |
|---|---|---|---|---|---|
| Walleye Capital LLC | 2 | $6 | 0.00% | −65,663−100.0% | Reduced |
| Huntington National Bank | 2 | $6 | 0.00% | 00.0% | Unchanged |
| First Horizon Corp | 3 | $9 | 0.00% | 00.0% | Unchanged |
| Larson Financial Group LLC | 5 | $15 | 0.00% | −5,301−99.9% | Reduced |
| Rothschild Investment LLC | 13 | $40 | 0.00% | +12+1,200.0% | Added |
| Bernard Wealth Management Corp. | 15 | $47 | 0.00% | 00.0% | Unchanged |
| SJS Investment Consulting Inc. | 16 | $50 | 0.00% | +16 | New |
| Essential Partners LLC | 27 | $83 | 0.00% | +27 | New |
| Clearstead Advisors, LLC | 40 | $122 | 0.00% | 00.0% | Unchanged |
| Parallel Advisors, LLC | 40 | $123 | 0.00% | 00.0% | Unchanged |
| Allworth Financial LP | 70 | $216 | 0.00% | −19−21.3% | Reduced |
| Nisa Investment Advisors, LLC | 95 | $293 | 0.00% | 00.0% | Unchanged |
| Northwestern Mutual Wealth Management Co | 100 | $308 | 0.00% | 00.0% | Unchanged |
| Harbour Investments, Inc. | 100 | $308 | 0.00% | +100 | New |
| Farther Finance Advisors, LLC | 141 | $440 | 0.00% | +68+93.2% | Added |
| MAI Capital Management | 150 | $462 | 0.00% | 00.0% | Unchanged |
| Legacy Wealth Managment, LLC | 250 | $770 | 0.00% | 00.0% | Unchanged |
| ZRC Wealth Management, LLC | 286 | $881 | 0.00% | 00.0% | Unchanged |
| Bogart Wealth, LLC | 298 | $918 | 0.00% | +298 | New |
| SRS Capital Advisors, Inc. | 339 | $1.04K | 0.00% | −7,826−95.8% | Reduced |
| Stone House Investment Management, LLC | 526 | $1.62K | 0.00% | +26+5.2% | Added |
| Sterling Capital Management LLC | 847 | $2.61K | 0.00% | +317+59.8% | Added |
| US Bancorp | 890 | $2.74K | 0.00% | +331+59.2% | Added |
| Massmutual Trust Co FSB | 1,000 | $3.08K | 0.00% | +82+8.9% | Added |
| The PNC Financial Services Group, Inc. | 1,552 | $4.78K | 0.00% | −860−35.7% | Reduced |
| GWM Advisors LLC | 1,888 | $5.82K | 0.00% | 00.0% | Unchanged |
| HighMark Wealth Management LLC | 2,000 | $6.16K | 0.00% | 00.0% | Unchanged |
| GF Fund Management Co. Ltd. | 2,331 | $7.18K | 0.00% | +282+13.8% | Added |
| Bellevue Asset Management, LLC | 2,433 | $7.49K | 0.00% | +2,433 | New |
| Optiver Holding B.V. | 3,858 | $11.9K | 0.00% | +3,858 | New |
| UBS Asset Management Americas Inc | 4,154 | $12.8K | 0.00% | +3,482+518.2% | Added |
| CWM, LLC | 4,519 | $13.9K | 0.00% | +1,437+46.6% | Added |
| Activest Wealth Management | 5,001 | $15.4K | 0.00% | 00.0% | Unchanged |
| Mirae Asset Global Investments Co., Ltd. | 6,532 | $20.1K | 0.00% | +1,462+28.8% | Added |
| Group One Trading, L.P. | 6,695 | $20.6K | 0.00% | −24,677−78.7% | Reduced |
| California State Teachers Retirement System | 7,124 | $21.9K | 0.00% | +1,663+30.5% | Added |
| Acadian Asset Management LLC | 7,311 | $22.0K | 0.00% | −28,421−79.5% | Reduced |
| SBI Securities Co., Ltd. | 8,313 | $25.6K | 0.00% | −524−5.9% | Reduced |
| Geneos Wealth Management Inc. | 10,000 | $30.8K | 0.00% | 00.0% | Unchanged |
| IMC-Chicago, LLC | 10,004 | $30.8K | 0.00% | −163,126−94.2% | Reduced |
| JustInvest LLC | 10,127 | $31.2K | 0.00% | +10,127 | New |
| Change Path, LLC | 10,500 | $32.3K | 0.00% | 00.0% | Unchanged |
| Quantinno Capital Management LP | 10,636 | $32.8K | 0.00% | +10,636 | New |
| Ameritas Investment Partners, Inc. | 10,680 | $32.9K | 0.00% | +3,725+53.6% | Added |
| Xponance, Inc. | 10,783 | $33.2K | 0.00% | +10,783 | New |
| Sunbelt Securities, Inc. | 10,870 | $33.5K | 0.00% | +26+0.2% | Added |
| Foundations Investment Advisors, LLC | 11,052 | $34.0K | 0.00% | +11,052 | New |
| Cambridge Investment Research Advisors, Inc. | 11,206 | $35.0K | 0.00% | +11,206 | New |
| Legal & General Group Plc | 11,496 | $35.4K | 0.00% | +2,134+22.8% | Added |
| Nine Masts Capital Ltd | 11,850 | $36.5K | 0.01% | +11,850 | New |
| Smith, Moore & Co. | 13,205 | $40.7K | 0.00% | +13,205 | New |
| PFG Investments, LLC | 13,500 | $41.6K | 0.00% | +13,500 | New |
| Northeast Financial Group, Inc. | 13,641 | $42.0K | 0.01% | +248+1.9% | Added |
| Martingale Asset Management L P | 14,355 | $44.2K | 0.00% | 00.0% | Unchanged |
| Tower Research Capital LLC (TRC) | 14,488 | $44.6K | 0.00% | +6,299+76.9% | Added |
| DCF Advisers, LLC | 14,700 | $45.3K | 0.02% | −4,000−21.4% | Reduced |
| Victory Capital Management Inc | 14,763 | $45.5K | 0.00% | +2,833+23.7% | Added |
| Advisory Services Network, LLC | 15,260 | $47.0K | 0.00% | +100+0.7% | Added |
| Russell Investments Group, Ltd. | 16,092 | $49.6K | 0.00% | +1,555+10.7% | Added |
| EFG International AG | 16,500 | $50.8K | 0.00% | 00.0% | Unchanged |
| RSM US Wealth Management LLC | 16,691 | $51.4K | 0.00% | +16,691 | New |
| 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 |
| Caitong International Asset Management Co., Ltd | 17,217 | $53.0K | 0.01% | +15,293+794.9% | Added |
| Squarepoint Ops LLC | 18,126 | $55.8K | 0.00% | −16,823−48.1% | Reduced |
| Keudell/Morrison Wealth Management | 18,500 | $57.0K | 0.01% | 00.0% | Unchanged |
| Vines Capital Management, LLC | 18,884 | $58.2K | 0.06% | +1,000+5.6% | Added |
| Vontobel Holding Ltd. | 20,000 | $61.6K | 0.00% | +5,000+33.3% | Added |
| Advisor Group Holdings, Inc. | 20,678 | $63.7K | 0.00% | +1,737+9.2% | Added |
| Voya Investment Management LLC | 21,011 | $64.7K | 0.00% | +7,321+53.5% | Added |
| New York State Common Retirement Fund | 21,447 | $66.1K | 0.00% | 00.0% | Unchanged |
| Prudential Financial Inc | 21,790 | $67.1K | 0.00% | +21,790 | New |
| Scientech Research LLC | 21,840 | $67.3K | 0.06% | +21,840 | New |
| China Universal Asset Management Co., Ltd. | 22,223 | $68.4K | 0.01% | +5,220+30.7% | Added |
| Simplex Trading, LLC | 22,841 | $70.3K | 0.00% | +22,841 | New |
| Polymer Capital Management (US) LLC | 23,999 | $73.9K | 0.01% | +23,999 | New |
| ProShare Advisors LLC | 24,523 | $75.5K | 0.00% | +3,707+17.8% | Added |
| Royal Bank of Canada | 25,317 | $78.0K | 0.00% | −2,097−7.6% | Reduced |
| Jones Financial Companies LLLP | 25,869 | $78.1K | 0.00% | +13,343+106.5% | Added |
| Concurrent Investment Advisors, LLC | 26,508 | $81.6K | 0.00% | 00.0% | Unchanged |
| Voleon Capital Management LP | 27,142 | $83.6K | 0.00% | −19,913−42.3% | Reduced |
| Farallon Capital Management, L.L.C. | 27,600 | $85.0K | 0.00% | 00.0% | Unchanged |
| Blair William & Co | 28,223 | $86.9K | 0.00% | −28,211−50.0% | Reduced |
| E Fund Management Co., Ltd. | 29,072 | $89.5K | 0.00% | +29,072 | New |
| TCG Advisory Services, LLC | 30,218 | $93.1K | 0.00% | +16,000+112.5% | Added |
| CI Private Wealth, LLC | 30,553 | $94.1K | 0.00% | +30,553 | New |
| Intech Investment Management LLC | 30,761 | $94.7K | 0.00% | −21,796−41.5% | Reduced |
| MML Investors Services, LLC | 34,550 | $106.4K | 0.00% | 00.0% | Unchanged |
| Manufacturers Life Insurance Company, The | 34,763 | $107.1K | 0.00% | +7,167+26.0% | Added |
| Police & Firemen's Retirement System of New Jersey | 35,433 | $109.1K | 0.00% | +11,860+50.3% | Added |
| Cetera Investment Advisers | 35,453 | $109.2K | 0.00% | +5,766+19.4% | Added |
| EverSource Wealth Advisors, LLC | 35,650 | $109.8K | 0.00% | +17,967+101.6% | Added |
| Kovack Advisors, Inc. | 36,250 | $111.7K | 0.01% | +1,035+2.9% | Added |
| Creative Planning | 39,229 | $120.8K | 0.00% | −7,657−16.3% | Reduced |
| Vanguard Global Advisers, LLC | 42,826 | $131.9K | 0.00% | +42,826 | New |
| Rockefeller Capital Management L.P. | 46,370 | $142.8K | 0.00% | +3,203+7.4% | Added |
| Axq Capital, LP | 47,752 | $147.1K | 0.02% | +22,051+85.8% | Added |
| ExodusPoint Capital Management, LP | 48,619 | $149.7K | 0.00% | +36,698+307.8% | Added |
| Virtus Investment Advisers, Inc. | 51,743 | $159.4K | 0.04% | +1,261+2.5% | Added |
| Canada Pension Plan Investment Board | 53,300 | $164.2K | 0.00% | +23,300+77.7% | Added |