Altimmune Inc (ALT) returns
Altimmune returns over 10 years
$1,000 invested in Altimmune ten years ago was worth $9.53 at the close on October 30, 2026, with dividends reinvested: an average return of -37.2% a year. The same $1,000 in the S&P 500 (SPY) became $4,166.
Total return by period
| Period | Total return | A year, on average | $1,000 became | S&P 500 (SPY) |
|---|---|---|---|---|
| 1 month | -28.7% | — | $713.29 | -0.9% |
| 3 months | -31.5% | — | $684.56 | +2.1% |
| Year to date | -43.5% | — | $565.10 | +11.7% |
| 1 year | -49.9% | — | $501.23 | +12.4% |
| 3 years | -14.6% | -5.1% | $853.56 | +88.5% |
| 5 years | -81.1% | -28.3% | $188.89 | +76.0% |
| 10 years | -99.0% | -37.2% | $9.53 | +316.6% |
Altimmune return by calendar year
| Year | ALT | S&P 500 (SPY) | Difference |
|---|---|---|---|
| 2026 to date | -43.5% | +11.7% | -55.2% |
| 2025 | -49.9% | +17.7% | -67.6% |
| 2024 | -35.9% | +24.9% | -60.8% |
| 2023 | -31.6% | +26.2% | -57.8% |
| 2022 | +79.6% | -18.2% | +97.8% |
| 2021 | -18.8% | +28.7% | -47.5% |
| 2020 | +496.8% | +18.4% | +478.5% |
| 2019 | -8.3% | +31.2% | -39.5% |
| 2018 | -96.5% | -4.6% | -92.0% |
| 2017 | -76.1% | +21.7% | -97.8% |
| 2016 | +69.7% | +12.0% | +57.7% |
Past returns do not predict future returns. Returns are computed from our daily closes, adjusted for splits and with dividends reinvested on their ex-dates; taxes and trading costs are left out.
See also: ALT financials
No forecast, no recommendation. This page describes Altimmune Inc from published data; it is not advice to buy, sell or hold any security.
Figures as of the close on Oct 30, 2026 unless a row says otherwise. Prices are split adjusted; returns include dividends reinvested. Data may be delayed. See the disclaimer and how TrendArc works.