Altimmune, Inc. (ALT)
NASDAQ: ALT · Real-Time Price · USD
4.000
+0.080 (2.04%)
At close: Sep 26, 2025, 4:00 PM EDT
3.970
-0.030 (-0.75%)
After-hours: Sep 26, 2025, 7:46 PM EDT
Altimmune Stock Price History
Historical Data
| Date | Open | High | Low | Close | Adj. Close | Change | Volume |
|---|---|---|---|---|---|---|---|
| Sep 26, 2025 | 3.92 | 4.00 | 3.79 | 4.00 | 4.00 | 2.04% | 2,499,805 |
| Sep 25, 2025 | 3.91 | 4.14 | 3.83 | 3.92 | 3.92 | - | 3,222,453 |
| Sep 24, 2025 | 3.80 | 3.96 | 3.80 | 3.92 | 3.92 | 3.43% | 1,956,082 |
| Sep 23, 2025 | 3.96 | 3.97 | 3.78 | 3.79 | 3.79 | -4.29% | 1,795,203 |
| Sep 22, 2025 | 3.78 | 4.06 | 3.69 | 3.96 | 3.96 | 4.76% | 3,106,031 |
| Sep 19, 2025 | 3.89 | 3.93 | 3.77 | 3.78 | 3.78 | -2.33% | 4,438,129 |
| Sep 18, 2025 | 3.70 | 4.19 | 3.67 | 3.87 | 3.87 | 8.40% | 6,514,854 |
| Sep 17, 2025 | 3.63 | 3.68 | 3.56 | 3.57 | 3.57 | -1.65% | 1,991,482 |
| Sep 16, 2025 | 3.58 | 3.72 | 3.56 | 3.63 | 3.63 | 1.11% | 1,919,257 |
| Sep 15, 2025 | 3.63 | 3.68 | 3.54 | 3.59 | 3.59 | -1.37% | 2,061,831 |
| Sep 12, 2025 | 3.69 | 3.73 | 3.63 | 3.64 | 3.64 | -1.36% | 1,764,551 |
| Sep 11, 2025 | 3.67 | 3.74 | 3.65 | 3.69 | 3.69 | 0.54% | 2,068,463 |
| Sep 10, 2025 | 3.78 | 3.78 | 3.60 | 3.67 | 3.67 | -2.91% | 1,673,017 |
| Sep 9, 2025 | 3.68 | 3.79 | 3.65 | 3.78 | 3.78 | 1.89% | 1,552,626 |
| Sep 8, 2025 | 3.78 | 3.82 | 3.70 | 3.71 | 3.71 | -1.85% | 1,513,775 |
| Sep 5, 2025 | 3.59 | 3.79 | 3.55 | 3.78 | 3.78 | 6.18% | 2,657,523 |
| Sep 4, 2025 | 3.65 | 3.65 | 3.54 | 3.56 | 3.56 | -3.26% | 1,733,159 |
| Sep 3, 2025 | 3.73 | 3.84 | 3.66 | 3.68 | 3.68 | -1.87% | 1,595,008 |
| Sep 2, 2025 | 3.81 | 3.83 | 3.57 | 3.75 | 3.75 | -2.09% | 2,601,466 |
| Aug 29, 2025 | 3.72 | 3.86 | 3.66 | 3.83 | 3.83 | 3.23% | 2,752,229 |
| Aug 28, 2025 | 3.79 | 3.84 | 3.63 | 3.71 | 3.71 | 1.09% | 4,097,036 |
| Aug 27, 2025 | 3.47 | 3.70 | 3.43 | 3.67 | 3.67 | 6.69% | 5,196,706 |
| Aug 26, 2025 | 3.38 | 3.46 | 3.35 | 3.44 | 3.44 | 1.47% | 1,728,238 |
| Aug 25, 2025 | 3.53 | 3.55 | 3.37 | 3.39 | 3.39 | -4.24% | 2,623,998 |
| Aug 22, 2025 | 3.51 | 3.66 | 3.51 | 3.54 | 3.54 | 0.28% | 2,836,057 |
| Aug 21, 2025 | 3.59 | 3.61 | 3.52 | 3.53 | 3.53 | -2.75% | 1,918,509 |
| Aug 20, 2025 | 3.58 | 3.65 | 3.53 | 3.63 | 3.63 | 0.28% | 2,242,546 |
| Aug 19, 2025 | 3.70 | 3.78 | 3.53 | 3.62 | 3.62 | 1.69% | 5,046,057 |
| Aug 18, 2025 | 3.59 | 3.63 | 3.51 | 3.56 | 3.56 | -1.93% | 2,915,293 |
| Aug 15, 2025 | 3.68 | 3.74 | 3.62 | 3.63 | 3.63 | -1.36% | 3,043,355 |
| Aug 14, 2025 | 3.70 | 3.77 | 3.65 | 3.68 | 3.68 | -1.60% | 2,888,915 |
| Aug 13, 2025 | 3.64 | 3.91 | 3.55 | 3.74 | 3.74 | 3.31% | 3,960,683 |
| Aug 12, 2025 | 3.51 | 3.86 | 3.51 | 3.62 | 3.62 | 7.10% | 5,401,011 |
| Aug 11, 2025 | 3.44 | 3.54 | 3.34 | 3.38 | 3.38 | -2.03% | 2,786,585 |
| Aug 8, 2025 | 3.51 | 3.56 | 3.43 | 3.45 | 3.45 | -1.99% | 2,308,065 |
| Aug 7, 2025 | 3.66 | 3.68 | 3.49 | 3.52 | 3.52 | -2.22% | 2,430,025 |
| Aug 6, 2025 | 3.65 | 3.65 | 3.54 | 3.60 | 3.60 | -1.91% | 1,786,150 |
| Aug 5, 2025 | 3.55 | 3.74 | 3.54 | 3.67 | 3.67 | 2.51% | 2,536,081 |
| Aug 4, 2025 | 3.66 | 3.66 | 3.57 | 3.58 | 3.58 | -0.83% | 1,888,447 |
| Aug 1, 2025 | 3.62 | 3.72 | 3.58 | 3.61 | 3.61 | -2.17% | 1,814,212 |
| Jul 31, 2025 | 3.61 | 3.77 | 3.61 | 3.69 | 3.69 | 1.10% | 2,735,559 |
| Jul 30, 2025 | 3.90 | 3.90 | 3.58 | 3.65 | 3.65 | -4.70% | 3,318,051 |
| Jul 29, 2025 | 4.01 | 4.03 | 3.74 | 3.83 | 3.83 | -4.96% | 3,781,258 |
| Jul 28, 2025 | 4.10 | 4.14 | 4.03 | 4.03 | 4.03 | -1.23% | 2,211,088 |
| Jul 25, 2025 | 4.06 | 4.17 | 4.01 | 4.08 | 4.08 | -0.73% | 2,968,950 |
| Jul 24, 2025 | 4.26 | 4.32 | 4.09 | 4.11 | 4.11 | -4.20% | 2,015,146 |
| Jul 23, 2025 | 4.22 | 4.39 | 4.18 | 4.29 | 4.29 | 2.14% | 5,002,940 |
| Jul 22, 2025 | 4.08 | 4.25 | 4.06 | 4.20 | 4.20 | 3.70% | 3,266,371 |
| Jul 21, 2025 | 4.13 | 4.26 | 4.03 | 4.05 | 4.05 | -0.74% | 3,014,931 |
| Jul 18, 2025 | 4.14 | 4.25 | 4.05 | 4.08 | 4.08 | 0.74% | 3,496,406 |