Altimmune Stock Price History
NASDAQ: ALTHealth CareBiotechnology: Pharmaceutical PreparationsUSD
2.61+0.01 (+0.38%)
At close: Oct 9, 4:00 PM ET · Delayed 15 min
ALT price history at a glance
The price history for Altimmune (ALT) on this page begins on May 22, 2017, when the stock closed at $133.20; it most recently closed at $2.61 on October 5, 2026. The highest price in this record is $137.70, reached on May 22, 2017; the latest close is 98.1% below that peak. Across the 8 complete calendar years in the table, ALT finished higher in 2 and lower in 6. Its best year was 2020 (+487.5%) and its worst was 2018 (-95.6%).
Over roughly 9 years the share price changed -98.0%, a -34.3% compound annual price return (excluding dividends). In the last 12 months alone, ALT has lost 34.8%. Prices are split-adjusted closing prices; daily open, high, low, close and volume for the past year are listed below.
Summary generated from market data by MetaCap's automated system. Methodology
Key price levels
- High since 2017
- $137.70
- Date of high
- May 22, 2017
- Low since 2017
- $1.51
- Date of low
- Nov 18, 2019
- 52-week high
- $6.44
- 52-week low
- $2.55
- Last close
- $2.61
ALT returns
1 week
-4.57%
1 month
-22.09%
3 months
-14.43%
6 months
-19.44%
Year to date
-27.70%
1 year
-34.75%
3 years
-1.88%
5 years
-78.27%
ALT price return, excluding dividends.
ALT annual returns
| Year | Year-end close | Return |
|---|---|---|
| 2026 | 2.61 | -25.64% |
| 2025 | 3.51 | -51.65% |
| 2024 | 7.26 | -35.47% |
| 2023 | 11.25 | -31.61% |
| 2022 | 16.45 | +79.59% |
| 2021 | 9.16 | -18.79% |
| 2020 | 11.28 | +487.50% |
| 2019 | 1.92 | -26.72% |
| 2018 | 2.62 | -95.61% |
| 2017* | 59.70 | -55.18% |
* Partial year: the record begins after the start of 2017; return measured from the first available close.
2026 return is year to date.
ALT daily prices (past year)
| Date | Open | High | Low | Close | Change |
|---|---|---|---|---|---|
| 2.60 | 2.64 | 2.57 | 2.61 | +0.38% | |
| 2.65 | 2.65 | 2.55 | 2.60 | -2.26% | |
| 2.64 | 2.74 | 2.63 | 2.66 | -0.37% | |
| 2.70 | 2.70 | 2.64 | 2.67 | 0.00% | |
| 2.73 | 2.75 | 2.65 | 2.67 | -2.38% | |
| 2.80 | 2.81 | 2.71 | 2.74 | -0.91% | |
| 2.85 | 2.85 | 2.75 | 2.76 | -3.50% | |
| 2.99 | 2.99 | 2.86 | 2.86 | -3.70% | |
| 2.99 | 3.01 | 2.92 | 2.97 | +0.34% | |
| 3.04 | 3.07 | 2.95 | 2.96 | -3.27% | |
| 3.05 | 3.11 | 3.00 | 3.06 | +0.66% | |
| 3.18 | 3.20 | 2.98 | 3.04 | -4.70% | |
| 3.42 | 3.43 | 3.15 | 3.19 | -6.45% | |
| 3.33 | 3.41 | 3.25 | 3.41 | +4.28% | |
| 3.31 | 3.34 | 3.24 | 3.27 | +0.62% | |
| 3.23 | 3.26 | 3.18 | 3.25 | +0.31% | |
| 3.31 | 3.35 | 3.21 | 3.24 | 0.00% | |
| 3.27 | 3.29 | 3.20 | 3.24 | +0.31% | |
| 3.30 | 3.31 | 3.21 | 3.23 | -2.12% | |
| 3.27 | 3.36 | 3.27 | 3.30 | +0.92% | |
| 3.33 | 3.41 | 3.26 | 3.27 | -0.61% | |
| 3.32 | 3.35 | 3.25 | 3.29 | -1.79% | |
| 3.35 | 3.43 | 3.29 | 3.35 | -0.30% | |
| 3.46 | 3.55 | 3.34 | 3.36 | -1.75% | |
| 3.28 | 3.43 | 3.25 | 3.42 | +5.88% | |
| 3.30 | 3.32 | 3.19 | 3.23 | -1.52% | |
| 3.10 | 3.34 | 3.10 | 3.28 | +6.15% | |
| 3.07 | 3.10 | 3.02 | 3.09 | -0.64% | |
| 3.08 | 3.14 | 3.06 | 3.11 | 0.00% | |
| 3.21 | 3.23 | 3.06 | 3.11 | -4.01% | |
| 3.19 | 3.25 | 3.13 | 3.24 | +2.86% | |
| 3.20 | 3.20 | 3.09 | 3.15 | -1.56% | |
| 3.14 | 3.23 | 3.11 | 3.20 | +2.89% | |
| 3.13 | 3.13 | 3.03 | 3.11 | 0.00% | |
| 2.98 | 3.24 | 2.95 | 3.11 | +5.42% | |
| 3.07 | 3.08 | 2.92 | 2.95 | -5.45% | |
| 3.04 | 3.20 | 3.01 | 3.12 | +5.05% | |
| 2.99 | 3.03 | 2.96 | 2.97 | -1.00% | |
| 2.94 | 3.02 | 2.90 | 3.00 | +2.04% | |
| 2.95 | 2.97 | 2.86 | 2.94 | +2.08% | |
| 2.95 | 2.96 | 2.84 | 2.88 | -1.71% | |
| 3.05 | 3.20 | 2.92 | 2.93 | -2.33% | |
| 3.06 | 3.08 | 2.98 | 3.00 | -1.64% | |
| 3.09 | 3.10 | 2.99 | 3.05 | -0.97% | |
| 3.05 | 3.10 | 3.00 | 3.08 | +2.33% | |
| 3.03 | 3.05 | 2.95 | 3.01 | -0.66% | |
| 3.07 | 3.12 | 3.01 | 3.03 | -1.30% | |
| 3.01 | 3.08 | 2.95 | 3.07 | +2.33% | |
| 2.88 | 3.03 | 2.86 | 3.00 | +5.63% | |
| 2.99 | 2.99 | 2.78 | 2.84 | -4.70% | |
| 2.93 | 3.01 | 2.86 | 2.98 | +2.05% | |
| 3.00 | 3.10 | 2.90 | 2.92 | -2.34% | |
| 3.16 | 3.31 | 2.82 | 2.99 | +1.01% | |
| 2.80 | 3.03 | 2.80 | 2.96 | +6.86% | |
| 2.85 | 2.89 | 2.76 | 2.77 | -2.46% | |
| 2.79 | 2.84 | 2.75 | 2.84 | +1.07% | |
| 2.81 | 2.87 | 2.77 | 2.81 | -0.35% | |
| 2.81 | 2.87 | 2.78 | 2.82 | +0.36% | |
| 2.89 | 2.91 | 2.79 | 2.81 | -2.09% | |
| 2.79 | 2.95 | 2.77 | 2.87 | +0.70% | |
| 2.96 | 2.97 | 2.81 | 2.85 | -4.36% | |
| 2.94 | 3.00 | 2.89 | 2.98 | +1.71% | |
| 2.98 | 3.02 | 2.90 | 2.93 | -2.01% | |
| 3.01 | 3.02 | 2.92 | 2.99 | -1.97% | |
| 3.12 | 3.14 | 2.95 | 3.05 | -2.24% | |
| 3.11 | 3.15 | 3.04 | 3.12 | +0.32% | |
| 2.94 | 3.11 | 2.93 | 3.11 | +2.98% | |
| 3.08 | 3.12 | 2.96 | 3.02 | -1.95% | |
| 3.25 | 3.30 | 3.08 | 3.08 | -2.53% | |
| 3.18 | 3.26 | 3.10 | 3.16 | +0.32% | |
| 3.02 | 3.40 | 3.00 | 3.15 | +3.62% | |
| 2.95 | 3.14 | 2.91 | 3.04 | +3.40% | |
| 2.85 | 2.94 | 2.79 | 2.94 | +4.26% | |
| 2.85 | 2.90 | 2.74 | 2.82 | -1.74% | |
| 2.96 | 3.00 | 2.86 | 2.87 | -2.71% | |
| 2.92 | 3.04 | 2.92 | 2.95 | +1.37% | |
| 2.88 | 3.04 | 2.88 | 2.91 | -0.68% | |
| 2.84 | 3.05 | 2.83 | 2.93 | +8.52% | |
| 2.68 | 2.77 | 2.68 | 2.70 | +2.27% | |
| 2.65 | 2.71 | 2.62 | 2.64 | +0.76% | |
| 2.64 | 2.68 | 2.60 | 2.62 | -0.76% | |
| 2.62 | 2.68 | 2.58 | 2.64 | +1.15% | |
| 2.61 | 2.66 | 2.58 | 2.61 | +0.77% | |
| 2.62 | 2.65 | 2.57 | 2.59 | -0.77% | |
| 2.62 | 2.71 | 2.61 | 2.61 | -1.88% | |
| 2.77 | 2.80 | 2.62 | 2.66 | -2.56% | |
| 2.75 | 2.78 | 2.68 | 2.73 | +0.74% | |
| 2.92 | 2.92 | 2.69 | 2.71 | -7.19% | |
| 2.84 | 3.00 | 2.84 | 2.92 | +1.74% | |
| 2.93 | 2.95 | 2.84 | 2.87 | -1.03% | |
| 2.99 | 3.00 | 2.90 | 2.90 | -3.65% | |
| 3.02 | 3.05 | 2.93 | 3.01 | -1.31% | |
| 3.07 | 3.10 | 3.02 | 3.05 | -0.65% | |
| 2.98 | 3.13 | 2.98 | 3.07 | +3.02% | |
| 2.99 | 3.03 | 2.96 | 2.98 | +1.71% | |
| 2.90 | 3.00 | 2.89 | 2.93 | +1.03% | |
| 2.94 | 3.00 | 2.88 | 2.90 | -1.02% | |
| 2.80 | 2.93 | 2.77 | 2.93 | +3.90% | |
| 2.75 | 2.85 | 2.73 | 2.82 | +2.92% | |
| 2.80 | 2.84 | 2.73 | 2.74 | -2.14% | |
| 2.85 | 2.89 | 2.72 | 2.80 | -1.75% | |
| 2.90 | 2.94 | 2.81 | 2.85 | -2.40% | |
| 3.01 | 3.03 | 2.90 | 2.92 | -3.31% | |
| 2.98 | 3.04 | 2.89 | 3.02 | -1.95% | |
| 3.08 | 3.11 | 3.01 | 3.08 | -0.32% | |
| 3.09 | 3.22 | 3.06 | 3.09 | 0.00% | |
| 3.07 | 3.11 | 3.01 | 3.09 | +1.64% | |
| 3.22 | 3.24 | 3.00 | 3.04 | -6.75% | |
| 3.06 | 3.26 | 3.04 | 3.26 | +6.54% | |
| 3.08 | 3.15 | 3.00 | 3.06 | +1.32% | |
| 2.84 | 3.04 | 2.84 | 3.02 | +7.09% | |
| 2.59 | 2.82 | 2.56 | 2.82 | +8.46% | |
| 2.66 | 2.68 | 2.58 | 2.60 | -1.14% | |
| 2.71 | 2.73 | 2.60 | 2.63 | -4.01% | |
| 2.78 | 2.85 | 2.72 | 2.74 | -2.14% | |
| 2.86 | 2.91 | 2.75 | 2.80 | -1.75% | |
| 2.95 | 3.01 | 2.82 | 2.85 | -1.38% | |
| 3.08 | 3.16 | 2.80 | 2.89 | -16.71% | |
| 3.45 | 3.51 | 3.42 | 3.47 | +1.76% | |
| 3.56 | 3.64 | 3.39 | 3.41 | -4.21% | |
| 3.45 | 3.58 | 3.39 | 3.56 | +1.71% | |
| 3.55 | 3.60 | 3.42 | 3.50 | -0.28% | |
| 3.40 | 3.55 | 3.35 | 3.51 | +3.24% | |
| 3.33 | 3.42 | 3.29 | 3.40 | +3.34% | |
| 3.25 | 3.32 | 3.23 | 3.29 | +1.86% | |
| 3.23 | 3.28 | 3.18 | 3.23 | -0.31% | |
| 3.39 | 3.41 | 3.22 | 3.24 | -4.14% | |
| 3.35 | 3.44 | 3.31 | 3.38 | +0.30% | |
| 3.48 | 3.54 | 3.36 | 3.37 | -0.30% | |
| 3.34 | 3.45 | 3.26 | 3.38 | +1.50% | |
| 3.34 | 3.48 | 3.30 | 3.33 | -0.30% | |
| 3.10 | 3.35 | 3.07 | 3.34 | +7.05% | |
| 3.14 | 3.23 | 3.10 | 3.12 | +1.30% | |
| 2.98 | 3.12 | 2.95 | 3.08 | +6.94% | |
| 3.03 | 3.03 | 2.87 | 2.88 | -4.64% | |
| 3.16 | 3.19 | 3.02 | 3.02 | -5.63% | |
| 3.26 | 3.33 | 3.19 | 3.20 | -3.32% | |
| 3.30 | 3.39 | 3.24 | 3.31 | +2.16% | |
| 3.37 | 3.41 | 3.23 | 3.24 | -5.81% | |
| 3.40 | 3.53 | 3.31 | 3.44 | +2.99% | |
| 3.43 | 3.52 | 3.31 | 3.34 | -2.34% | |
| 3.38 | 3.51 | 3.34 | 3.42 | 0.00% | |
| 3.50 | 3.52 | 3.36 | 3.42 | -3.12% | |
| 3.63 | 3.71 | 3.52 | 3.53 | -2.49% | |
| 3.60 | 3.68 | 3.54 | 3.62 | +3.43% | |
| 3.62 | 3.68 | 3.47 | 3.50 | -2.78% | |
| 3.77 | 3.77 | 3.58 | 3.60 | -5.26% | |
| 3.89 | 3.91 | 3.74 | 3.80 | -1.55% | |
| 3.90 | 4.04 | 3.83 | 3.86 | -0.52% | |
| 3.64 | 3.89 | 3.61 | 3.88 | +9.60% | |
| 3.54 | 3.75 | 3.42 | 3.54 | +1.00% | |
| 4.10 | 4.20 | 3.50 | 3.51 | -17.92% | |
| 4.19 | 4.35 | 4.13 | 4.27 | +2.64% | |
| 4.05 | 4.26 | 4.04 | 4.16 | 0.00% | |
| 4.24 | 4.27 | 4.15 | 4.16 | -3.48% | |
| 4.40 | 4.47 | 4.29 | 4.31 | -3.36% | |
| 4.56 | 4.59 | 4.38 | 4.46 | -2.19% | |
| 4.59 | 4.61 | 4.49 | 4.56 | -0.22% | |
| 4.52 | 4.83 | 4.52 | 4.57 | +1.11% | |
| 4.34 | 4.64 | 4.34 | 4.52 | +3.20% | |
| 4.49 | 4.51 | 4.36 | 4.38 | -2.45% | |
| 4.47 | 4.53 | 4.27 | 4.49 | +0.67% | |
| 4.50 | 4.55 | 4.42 | 4.46 | -0.89% | |
| 4.54 | 4.64 | 4.48 | 4.50 | -0.66% | |
| 4.62 | 4.75 | 4.53 | 4.53 | -0.88% | |
| 4.65 | 4.70 | 4.47 | 4.57 | -1.30% | |
| 4.72 | 4.75 | 4.54 | 4.63 | -0.43% | |
| 4.70 | 4.83 | 4.62 | 4.65 | -0.85% | |
| 4.85 | 4.96 | 4.65 | 4.69 | -3.70% | |
| 5.00 | 5.09 | 4.84 | 4.87 | -1.02% | |
| 5.09 | 5.28 | 4.88 | 4.92 | -4.09% | |
| 5.47 | 5.53 | 5.09 | 5.13 | -6.22% | |
| 5.55 | 5.64 | 5.21 | 5.47 | -1.44% | |
| 5.56 | 5.75 | 5.26 | 5.55 | -0.89% | |
| 5.05 | 5.66 | 5.03 | 5.60 | +9.80% | |
| 5.22 | 5.49 | 5.03 | 5.10 | -0.39% | |
| 5.93 | 6.36 | 5.04 | 5.12 | -17.15% | |
| 5.64 | 6.22 | 5.60 | 6.18 | +9.19% | |
| 5.50 | 5.69 | 5.19 | 5.66 | +2.91% | |
| 5.40 | 6.44 | 5.34 | 5.50 | +2.23% | |
| 4.65 | 5.40 | 4.65 | 5.38 | +16.45% | |
| 4.25 | 4.63 | 4.19 | 4.62 | +9.22% | |
| 4.10 | 4.26 | 4.03 | 4.23 | -0.24% | |
| 4.30 | 4.37 | 4.17 | 4.24 | 0.00% | |
| 4.15 | 4.40 | 4.05 | 4.24 | +1.44% | |
| 4.00 | 4.21 | 3.98 | 4.18 | +4.24% | |
| 4.04 | 4.10 | 3.96 | 4.01 | -0.99% | |
| 4.08 | 4.13 | 4.00 | 4.05 | +0.75% | |
| 4.12 | 4.18 | 3.99 | 4.02 | -1.47% | |
| 4.15 | 4.22 | 4.02 | 4.08 | -2.63% | |
| 4.00 | 4.36 | 3.98 | 4.19 | +5.81% | |
| 4.08 | 4.18 | 3.86 | 3.96 | -3.18% | |
| 4.10 | 4.53 | 3.96 | 4.09 | +16.52% | |
| 3.62 | 3.66 | 3.48 | 3.51 | -2.77% | |
| 3.60 | 3.63 | 3.52 | 3.61 | 0.00% | |
| 3.68 | 3.72 | 3.60 | 3.61 | -1.90% | |
| 3.84 | 3.84 | 3.65 | 3.68 | -4.66% | |
| 3.97 | 3.99 | 3.84 | 3.86 | -3.02% | |
| 4.05 | 4.11 | 3.97 | 3.98 | -0.50% | |
| 4.10 | 4.16 | 3.98 | 4.00 | -3.38% | |
| 3.96 | 4.45 | 3.95 | 4.14 | +6.15% | |
| 4.58 | 4.59 | 3.83 | 3.90 | -22.77% | |
| 5.23 | 5.28 | 5.02 | 5.05 | -0.79% | |
| 5.03 | 5.37 | 5.02 | 5.09 | +1.19% | |
| 5.22 | 5.28 | 4.92 | 5.03 | -4.73% | |
| 5.29 | 5.50 | 5.17 | 5.28 | +0.19% | |
| 5.40 | 6.03 | 5.25 | 5.27 | -1.31% | |
| 5.40 | 5.63 | 5.31 | 5.34 | -1.66% | |
| 5.49 | 5.56 | 5.36 | 5.43 | -1.63% | |
| 5.69 | 5.83 | 5.37 | 5.52 | -1.60% | |
| 5.35 | 5.74 | 5.03 | 5.61 | +7.06% | |
| 5.31 | 5.44 | 5.19 | 5.24 | -1.32% | |
| 5.09 | 5.46 | 5.00 | 5.31 | +3.91% | |
| 4.82 | 5.15 | 4.70 | 5.11 | +7.35% | |
| 5.00 | 5.00 | 4.75 | 4.76 | -3.45% | |
| 5.08 | 5.12 | 4.73 | 4.93 | -6.27% | |
| 5.21 | 5.33 | 5.15 | 5.26 | +1.74% | |
| 5.11 | 5.31 | 5.10 | 5.17 | +0.58% | |
| 5.10 | 5.25 | 4.98 | 5.14 | +0.78% | |
| 4.83 | 5.19 | 4.80 | 5.10 | +6.03% | |
| 4.46 | 4.88 | 4.44 | 4.81 | +7.61% | |
| 4.67 | 4.71 | 4.40 | 4.47 | -2.61% | |
| 4.54 | 4.75 | 4.51 | 4.59 | -1.29% | |
| 4.16 | 4.73 | 4.09 | 4.65 | +10.98% | |
| 4.14 | 4.22 | 4.07 | 4.19 | +0.48% | |
| 3.95 | 4.23 | 3.95 | 4.17 | +2.71% | |
| 4.18 | 4.22 | 4.03 | 4.06 | -4.02% | |
| 4.30 | 4.35 | 4.12 | 4.23 | -1.17% | |
| 4.26 | 4.31 | 4.14 | 4.28 | +0.47% | |
| 4.20 | 4.36 | 4.06 | 4.26 | +3.65% | |
| 3.92 | 4.16 | 3.78 | 4.11 | +4.31% | |
| 3.82 | 4.12 | 3.76 | 3.94 | +5.07% | |
| 3.75 | 3.83 | 3.73 | 3.75 | -0.27% | |
| 3.89 | 3.98 | 3.74 | 3.76 | -5.05% | |
| 4.03 | 4.05 | 3.93 | 3.96 | -2.22% | |
| 4.25 | 4.25 | 3.99 | 4.05 | -0.49% | |
| 4.05 | 4.25 | 4.02 | 4.07 | +1.75% | |
| 4.06 | 4.07 | 3.93 | 4.00 | -1.48% | |
| 4.15 | 4.15 | 4.04 | 4.06 | -1.93% | |
| 3.99 | 4.15 | 3.99 | 4.14 | +4.81% | |
| 4.00 | 4.10 | 3.94 | 3.95 | -0.25% | |
| 3.90 | 4.04 | 3.90 | 3.96 | +1.54% | |
| 4.00 | 4.00 | 3.83 | 3.90 | -3.47% | |
| 3.98 | 4.10 | 3.95 | 4.04 | +1.00% | |
| 3.87 | 4.06 | 3.86 | 4.00 | +4.44% | |
| 3.85 | 3.94 | 3.79 | 3.83 | -1.54% | |
| 4.00 | 4.15 | 3.88 | 3.89 | -2.75% | |
| 3.98 | 4.11 | 3.95 | 4.00 | +0.76% | |
| 3.92 | 4.00 | 3.82 | 3.97 | -0.75% | |
| 3.92 | 4.04 | 3.85 | 4.00 | +2.04% | |
| 4.03 | 4.11 | 3.90 | 3.92 | -2.00% | |
| 4.00 | 4.06 | 3.92 | 4.00 | — |
Prices are adjusted for stock splits. See adjusted closing price for how dividends and splits affect history, and the ALT chart for longer ranges.