Altimmune Inc. (ALT)
Showing Closing Date Range from Sep 21 to Oct 19, 2026 compared to Aug 23 to Sep 20, 2026.
Compare Last 28 Days with Previous Period
Investor Relations:altimmune.com
Current Period Close
$2.23
Sep 21, 2026 - Oct 19, 2026
Previous Period Close
$3.25
Aug 23, 2026 - Sep 20, 2026
Net Comparison Delta
$-1.02 (-31.38%)
Relative performance vs prior benchmark
Historical Quotes & Breakdown(19 dates)
| Current Date | Current Close | Previous Date | Previous Close | Delta (%) |
|---|---|---|---|---|
| Oct 19, 2026 | $2.23 | Sep 18, 2026 | $3.25 | -31.38% |
| Oct 16, 2026 | $2.20 | Sep 17, 2026 | $3.24 | -32.10% |
| Oct 15, 2026 | $2.36 | Sep 16, 2026 | $3.24 | -27.16% |
| Oct 14, 2026 | $2.31 | Sep 15, 2026 | $3.23 | -28.48% |
| Oct 13, 2026 | $2.43 | Sep 14, 2026 | $3.30 | -26.36% |
| Oct 12, 2026 | $2.56 | Sep 11, 2026 | $3.27 | -21.71% |
| Oct 09, 2026 | $2.61 | Sep 10, 2026 | $3.29 | -20.67% |
| Oct 08, 2026 | $2.60 | Sep 09, 2026 | $3.35 | -22.39% |
| Oct 07, 2026 | $2.66 | Sep 08, 2026 | $3.36 | -20.83% |
| Oct 06, 2026 | $2.67 | Sep 04, 2026 | $3.42 | -21.93% |
| Oct 05, 2026 | $2.67 | Sep 03, 2026 | $3.23 | -17.34% |
| Oct 02, 2026 | $2.74 | Sep 02, 2026 | $3.28 | -16.62% |
| Oct 01, 2026 | $2.76 | Sep 01, 2026 | $3.09 | -10.68% |
| Sep 30, 2026 | $2.86 | Aug 31, 2026 | $3.11 | -8.04% |
| Sep 29, 2026 | $2.97 | Aug 28, 2026 | $3.11 | -4.50% |
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