If you invested $1000 in Altimmune, Inc. (ALT) since IPO date, it would be worth $16.55 as of October 22, 2026, based on a reinvested dividends scenario. Over the same period, a $1000 investment made 5 years ago would be worth $191.41, while $1000 invested 1 year ago would be worth $565.38. This corresponds to total returns of -98.34%, -80.86%, -43.46%, respectively, with annualized returns of -35.32%, -28.14%, -43.46%.
Custom investment amounts or purchase dates can also be explored using the Stoculator calculator. Past performance does not guarantee future results.
Date Range:
| Date | Open | Close | Adj Close | High | Low | Volume |
|---|---|---|---|---|---|---|
| October 21, 2026 | 2.31 | 2.23 | 2.23 | 2.35 | 2.19 | 4.49M |
| October 20, 2026 | 2.22 | 2.3 | 2.3 | 2.32 | 2.2 | 2.23M |
| October 19, 2026 | 2.22 | 2.23 | 2.23 | 2.26 | 2.18 | 2.6M |
| October 16, 2026 | 2.37 | 2.2 | 2.2 | 2.37 | 2.17 | 4.23M |
| October 15, 2026 | 2.31 | 2.36 | 2.36 | 2.38 | 2.29 | 3.34M |
| October 14, 2026 | 2.4 | 2.31 | 2.31 | 2.41 | 2.29 | 5.62M |
| October 13, 2026 | 2.56 | 2.43 | 2.43 | 2.56 | 2.43 | 3.71M |
| October 12, 2026 | 2.59 | 2.56 | 2.56 | 2.63 | 2.56 | 2.16M |
| October 09, 2026 | 2.6 | 2.61 | 2.61 | 2.64 | 2.57 | 2.68M |
| October 08, 2026 | 2.66 | 2.6 | 2.6 | 2.66 | 2.55 | 4.93M |
| October 07, 2026 | 2.66 | 2.66 | 2.66 | 2.74 | 2.63 | 3.16M |
| October 06, 2026 | 2.7 | 2.67 | 2.67 | 2.7 | 2.64 | 7.61M |
| October 05, 2026 | 2.73 | 2.67 | 2.67 | 2.75 | 2.65 | 3.8M |
| October 02, 2026 | 2.8 | 2.74 | 2.74 | 2.81 | 2.71 | 4.24M |
| October 01, 2026 | 2.85 | 2.76 | 2.76 | 2.85 | 2.75 | 3.59M |
| September 30, 2026 | 2.99 | 2.86 | 2.86 | 2.99 | 2.86 | 4.9M |
| September 29, 2026 | 2.99 | 2.97 | 2.97 | 3.01 | 2.92 | 2.56M |
| September 28, 2026 | 3.04 | 2.96 | 2.96 | 3.07 | 2.95 | 3.31M |
| September 25, 2026 | 3.05 | 3.06 | 3.06 | 3.11 | 3 | 2.86M |
| September 24, 2026 | 3.18 | 3.04 | 3.04 | 3.2 | 2.98 | 3.67M |
| September 23, 2026 | 3.42 | 3.19 | 3.19 | 3.43 | 3.15 | 4.51M |
| September 22, 2026 | 3.33 | 3.41 | 3.41 | 3.41 | 3.25 | 3.98M |
| September 21, 2026 | 3.31 | 3.27 | 3.27 | 3.32 | 3.25 | 3.52M |
| September 18, 2026 | 3.23 | 3.25 | 3.25 | 3.26 | 3.18 | 12.18M |
| September 17, 2026 | 3.31 | 3.24 | 3.24 | 3.35 | 3.21 | 3.46M |
| September 16, 2026 | 3.27 | 3.24 | 3.24 | 3.29 | 3.2 | 3.33M |
| September 15, 2026 | 3.3 | 3.23 | 3.23 | 3.31 | 3.21 | 2.33M |
| September 11, 2026 | 3.33 | 3.27 | 3.27 | 3.41 | 3.26 | 2.68M |
| September 10, 2026 | 3.32 | 3.29 | 3.29 | 3.35 | 3.25 | 2.54M |
| September 09, 2026 | 3.35 | 3.35 | 3.35 | 3.43 | 3.29 | 3.07M |
| September 08, 2026 | 3.46 | 3.36 | 3.36 | 3.55 | 3.34 | 3.59M |
| September 04, 2026 | 3.28 | 3.42 | 3.42 | 3.43 | 3.25 | 4.85M |
| September 03, 2026 | 3.3 | 3.23 | 3.23 | 3.32 | 3.19 | 2.55M |
| September 02, 2026 | 3.1 | 3.28 | 3.28 | 3.34 | 3.1 | 7.47M |
| September 01, 2026 | 3.07 | 3.09 | 3.09 | 3.1 | 3.02 | 2.34M |
| August 31, 2026 | 3.08 | 3.11 | 3.11 | 3.14 | 3.06 | 2.22M |
| August 28, 2026 | 3.21 | 3.11 | 3.11 | 3.23 | 3.06 | 3.19M |
| August 27, 2026 | 3.19 | 3.24 | 3.24 | 3.25 | 3.13 | 2.24M |
| August 26, 2026 | 3.2 | 3.15 | 3.15 | 3.2 | 3.09 | 4.05M |
| August 25, 2026 | 3.14 | 3.2 | 3.2 | 3.23 | 3.11 | 3.81M |
| August 24, 2026 | 3.13 | 3.11 | 3.11 | 3.13 | 3.03 | 2.71M |
| August 21, 2026 | 2.98 | 3.11 | 3.11 | 3.24 | 2.95 | 6.15M |
| August 20, 2026 | 3.07 | 2.95 | 2.95 | 3.08 | 2.92 | 4.68M |
| August 19, 2026 | 3.04 | 3.12 | 3.12 | 3.2 | 3.01 | 10.79M |
| August 18, 2026 | 2.99 | 2.97 | 2.97 | 3.03 | 2.96 | 2.43M |
| August 17, 2026 | 2.94 | 3 | 3 | 3.02 | 2.9 | 4.03M |
| August 14, 2026 | 2.95 | 2.94 | 2.94 | 2.97 | 2.86 | 2.99M |
| August 13, 2026 | 2.95 | 2.88 | 2.88 | 2.96 | 2.84 | 4.1M |
| August 12, 2026 | 3.05 | 2.93 | 2.93 | 3.2 | 2.92 | 6.02M |
| August 11, 2026 | 3.06 | 3 | 3 | 3.08 | 2.98 | 0 |
| August 10, 2026 | 3.09 | 3.05 | 3.05 | 3.1 | 2.99 | 5.26M |
| August 07, 2026 | 3.05 | 3.08 | 3.08 | 3.1 | 3 | 4.5M |
| August 06, 2026 | 3.03 | 3.01 | 3.01 | 3.05 | 2.95 | 3.97M |
| August 05, 2026 | 3.07 | 3.03 | 3.03 | 3.12 | 3.01 | 3.08M |
| August 04, 2026 | 3.01 | 3.07 | 3.07 | 3.08 | 2.95 | 8.16M |
| August 03, 2026 | 2.88 | 3 | 3 | 3.03 | 2.86 | 4.62M |
| July 31, 2026 | 2.99 | 2.84 | 2.84 | 2.99 | 2.78 | 3.88M |
| July 30, 2026 | 2.93 | 2.98 | 2.98 | 3.01 | 2.86 | 5.42M |
| July 29, 2026 | 3 | 2.92 | 2.92 | 3.1 | 2.9 | 8.29M |
| July 28, 2026 | 3.16 | 2.99 | 2.99 | 3.31 | 2.82 | 17.09M |