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 |
|---|---|---|---|---|---|
| SG Americas Securities, LLC | 47,089 | $143.0K | 0.00% | −8,536−15.3% | Reduced |
| Caption Management, LLC | 46,617 | $141.7K | 0.00% | −27,821−37.4% | Reduced |
| Intech Investment Management LLC | 45,911 | $139.6K | 0.00% | +15,150+49.3% | Added |
| Quantbot Technologies LP | 45,632 | $138.7K | 0.01% | +45,632 | New |
| Graham Capital Management, L.P. | 44,940 | $136.6K | 0.00% | +44,940 | New |
| Russell Investments Group, Ltd. | 43,696 | $132.8K | 0.00% | +27,604+171.5% | Added |
| Voya Investment Management LLC | 39,783 | $120.9K | 0.00% | +18,772+89.3% | Added |
| Engineers Gate Manager LP | 38,037 | $115.6K | 0.00% | −78,075−67.2% | Reduced |
| Kovack Advisors, Inc. | 36,000 | $109.4K | 0.01% | −250−0.7% | Reduced |
| Cerity Partners LLC | 35,469 | $107.8K | 0.00% | +35,469 | New |
| Prudential Financial Inc | 35,190 | $107.0K | 0.00% | +13,400+61.5% | Added |
| Schonfeld Strategic Advisors LLC | 35,077 | $106.6K | 0.00% | +35,077 | New |
| MML Investors Services, LLC | 34,550 | $105.0K | 0.00% | 00.0% | Unchanged |
| ProShare Advisors LLC | 32,427 | $98.6K | 0.00% | +7,904+32.2% | Added |
| Sequoia Financial Advisors, LLC | 32,285 | $98.1K | 0.00% | +32,285 | New |
| E Fund Management Co., Ltd. | 31,734 | $96.5K | 0.00% | +2,662+9.2% | Added |
| China Universal Asset Management Co., Ltd. | 30,951 | $94.1K | 0.01% | +8,728+39.3% | Added |
| Blair William & Co | 30,660 | $93.2K | 0.00% | +2,437+8.6% | Added |
| TCG Advisory Services, LLC | 30,319 | $92.2K | 0.00% | +101+0.3% | Added |
| Concurrent Investment Advisors, LLC | 28,649 | $87.1K | 0.00% | +2,141+8.1% | Added |
| Wealth Enhancement Advisory Services, LLC | 25,989 | $79.3K | 0.00% | +25,989 | New |
| Two Sigma Securities, LLC | 25,435 | $77.3K | 0.01% | +25,435 | New |
| Vontobel Holding Ltd. | 25,000 | $76.0K | 0.00% | +5,000+25.0% | Added |
| nVerses Capital, LLC | 24,408 | $74.2K | 0.11% | +24,408 | New |
| Captrust Financial Advisors | 23,960 | $72.8K | 0.00% | +23,960 | New |
| North Star Investment Management Corp. | 22,000 | $66.9K | 0.00% | +5,000+29.4% | Added |
| Raymond James Financial Inc | 21,384 | $65.0K | 0.00% | −32,412−60.2% | Reduced |
| Victory Capital Management Inc | 21,218 | $64.5K | 0.00% | +6,455+43.7% | Added |
| Advisor Group Holdings, Inc. | 21,078 | $64.1K | 0.00% | +400+1.9% | Added |
| Voleon Capital Management LP | 20,715 | $63.0K | 0.00% | −6,427−23.7% | Reduced |
| EverSource Wealth Advisors, LLC | 19,717 | $59.9K | 0.00% | −15,933−44.7% | Reduced |
| Legal & General Group Plc | 19,289 | $58.6K | 0.00% | +7,793+67.8% | Added |
| Atria Investments LLC | 19,017 | $57.8K | 0.00% | +19,017 | New |
| PFG Investments, LLC | 19,000 | $57.8K | 0.00% | +5,500+40.7% | Added |
| Jain Global LLC | 18,947 | $57.6K | 0.00% | +18,947 | New |
| Xponance, Inc. | 18,917 | $57.5K | 0.00% | +8,134+75.4% | Added |
| Vines Capital Management, LLC | 18,884 | $57.4K | 0.05% | 00.0% | Unchanged |
| Neuberger Berman Group LLC | 18,664 | $56.7K | 0.00% | +18,664 | New |
| Ameritas Investment Partners, Inc. | 18,039 | $54.8K | 0.00% | +7,359+68.9% | Added |
| Centiva Capital, LP | 17,938 | $54.5K | 0.00% | +17,938 | New |
| Syon Capital LLC | 17,118 | $52.0K | 0.00% | +17,118 | New |
| Miracle Mile Advisors, LLC | 17,000 | $51.7K | 0.00% | 00.0% | Unchanged |
| RSM US Wealth Management LLC | 16,709 | $50.8K | 0.00% | +18+0.1% | Added |
| EFG International AG | 16,500 | $50.2K | 0.00% | 00.0% | Unchanged |
| Winton Group Ltd | 16,100 | $48.9K | 0.00% | +16,100 | New |
| JustInvest LLC | 15,978 | $48.6K | 0.00% | +5,851+57.8% | Added |
| PKS Advisory Services, LLC | 15,600 | $47.4K | 0.01% | +15,600 | New |
| DCF Advisers, LLC | 14,700 | $44.7K | 0.01% | 00.0% | Unchanged |
| Polymer Capital Management (US) LLC | 14,001 | $42.6K | 0.01% | −9,998−41.7% | Reduced |
| Sciencast Management LP | 13,566 | $41.2K | 0.01% | +13,566 | New |
| Aigen Investment Management, LP | 13,496 | $41.0K | 0.01% | +13,496 | New |
| R Squared Ltd | 13,264 | $40.3K | 0.02% | +13,264 | New |
| Smith, Moore & Co. | 13,205 | $40.1K | 0.00% | 00.0% | Unchanged |
| Excelsior Advisor Network LLC | 13,000 | $39.5K | 0.01% | +13,000 | New |
| Martingale Asset Management L P | 12,855 | $39.1K | 0.00% | −1,500−10.4% | Reduced |
| Brighton Jones LLC | 12,596 | $38.3K | 0.00% | +12,596 | New |
| Colony Group, LLC | 12,499 | $38.0K | 0.00% | +12,499 | New |
| Abel Hall, LLC | 11,527 | $35.0K | 0.01% | +11,527 | New |
| Royal Bank of Canada | 11,904 | $35.0K | 0.00% | −13,413−53.0% | Reduced |
| SRS Capital Advisors, Inc. | 11,350 | $34.5K | 0.00% | +11,011+3,248.1% | Added |
| Cambridge Investment Research Advisors, Inc. | 11,206 | $34.0K | 0.00% | 00.0% | Unchanged |
| Foundations Investment Advisors, LLC | 11,052 | $33.6K | 0.00% | 00.0% | Unchanged |
| CIBC Bancorp USA Inc. | 10,974 | $33.4K | 0.00% | +10,974 | New |
| Change Path, LLC | 10,850 | $33.0K | 0.00% | +350+3.3% | Added |
| Advisory Services Network, LLC | 10,760 | $32.7K | 0.00% | −4,500−29.5% | Reduced |
| Geneos Wealth Management Inc. | 10,000 | $30.4K | 0.00% | 00.0% | Unchanged |
| Jones Financial Companies LLLP | 10,156 | $28.6K | 0.00% | −15,713−60.7% | Reduced |
| Mirae Asset Global Investments Co., Ltd. | 8,698 | $26.4K | 0.00% | +2,166+33.2% | Added |
| Walleye Capital LLC | 8,499 | $25.8K | 0.00% | +8,497+424,850.0% | Added |
| SBI Securities Co., Ltd. | 8,062 | $24.5K | 0.00% | −251−3.0% | Reduced |
| Tower Research Capital LLC (TRC) | 7,477 | $22.7K | 0.00% | −7,011−48.4% | Reduced |
| Allworth Financial LP | 6,892 | $21.0K | 0.00% | +6,822+9,745.7% | Added |
| Activest Wealth Management | 5,001 | $15.2K | 0.00% | 00.0% | Unchanged |
| UBS Asset Management Americas Inc | 4,154 | $12.6K | 0.00% | 00.0% | Unchanged |
| Sterling Capital Management LLC | 4,006 | $12.2K | 0.00% | +3,159+373.0% | Added |
| The PNC Financial Services Group, Inc. | 3,860 | $11.7K | 0.00% | +2,308+148.7% | Added |
| GF Fund Management Co. Ltd. | 3,844 | $11.7K | 0.00% | +1,513+64.9% | Added |
| Pacer Advisors, Inc. | 3,759 | $11.0K | 0.00% | +3,759 | New |
| Northwestern Mutual Wealth Management Co | 3,100 | $9.42K | 0.00% | +3,000+3,000.0% | Added |
| California State Teachers Retirement System | 2,737 | $8.32K | 0.00% | −4,387−61.6% | Reduced |
| Bellevue Asset Management, LLC | 2,433 | $7.40K | 0.00% | 00.0% | Unchanged |
| HighMark Wealth Management LLC | 2,000 | $6.08K | 0.00% | 00.0% | Unchanged |
| Optiver Holding B.V. | 1,910 | $5.81K | 0.00% | −1,948−50.5% | Reduced |
| GWM Advisors LLC | 1,888 | $5.74K | 0.00% | 00.0% | Unchanged |
| Clear Street Markets LLC | 1,507 | $4.58K | 0.00% | +1,507 | New |
| Farther Finance Advisors, LLC | 1,044 | $3.16K | 0.00% | +903+640.4% | Added |
| Massmutual Trust Co FSB | 1,000 | $3.04K | 0.00% | 00.0% | Unchanged |
| Nisa Investment Advisors, LLC | 895 | $2.72K | 0.00% | +800+842.1% | Added |
| Federated Hermes, Inc. | 760 | $2.31K | 0.00% | +760 | New |
| Strategic Wealth Partners, Ltd. | 700 | $2.13K | 0.00% | +700 | New |
| Rothschild Investment LLC | 551 | $1.68K | 0.00% | +538+4,138.5% | Added |
| Stone House Investment Management, LLC | 526 | $1.60K | 0.00% | 00.0% | Unchanged |
| Essential Partners LLC | 400 | $1.22K | 0.00% | +373+1,381.5% | Added |
| Clearstead Advisors, LLC | 328 | $998 | 0.00% | +288+720.0% | Added |
| Wealth Enhancement Trust Services, Inc. | 306 | $930 | 0.00% | +306 | New |
| Bogart Wealth, LLC | 298 | $906 | 0.00% | 00.0% | Unchanged |
| ZRC Wealth Management, LLC | 286 | $870 | 0.00% | 00.0% | Unchanged |
| Caitong International Asset Management Co., Ltd | 257 | $781 | 0.00% | −16,960−98.5% | Reduced |
| Parkside Financial Bank & Trust | 235 | $713 | 0.00% | +235 | New |
| SJS Investment Consulting Inc. | 234 | $712 | 0.00% | +218+1,362.5% | Added |