Altimmune, Inc. (ALT) Stock Price History
Historical prices from 2017 to 2026
- 1M
- -3.8%
- 3M
- -11.9%
- YTD
- -19.7%
- 1Y
- -21.9%
- 3Y
- -6.5%
- 5Y
- -29.6%
Loading 10-year price history...
ALT Historical Performance
ALT Annual Returns
Year-by-year price performance · 2017–2026
- 2017 annual price return
- -55.2%
- 2018 annual price return
- -96.6%
- 2019 annual price return
- -27.3%
- 2020 annual price return
- +487.5%
- 2021 annual price return
- -27.9%
- 2022 annual price return
- +74.1%
- 2023 annual price return
- -28.0%
- 2024 annual price return
- -31.5%
- 2025 annual price return
- -49.2%
- 2026 annual price return
- +22.8%
ALT Stock Price Trajectory (2017–2026)
As of June 29, 2026, Altimmune, Inc. (ALT) trades at $2.82, representing a -21.9% return over the past year. The stock has delivered a -81.8% total return over five years (-29.6% CAGR), reflecting challenging market conditions.
The stock reached its all-time high of $137.70 on May 26, 2017. From this peak, ALT has corrected -98.0%, currently trading 27% below its 200-day moving average, suggesting potential weakness.
When compared to Healthcare sector peers VKTX (+35.0% 1Y), TERN (+1223.8% 1Y), and NRXP (+6.6% 1Y), ALT has underperformed the peer group average. Compare ALT vs VKTX →
ALT Historical Price Data · from 2017
Rows 1–50 of 2,284| Date | Open | High | Low | Close | Volume | Change % |
|---|---|---|---|---|---|---|
| 2026-06-26 | 2.85 | 2.90 | 2.75 | 2.82 | 0 | -1.74% |
| 2026-06-25 | 2.96 | 3.00 | 2.86 | 2.87 | 2.75M | -2.71% |
| 2026-06-24 | 2.92 | 3.04 | 2.92 | 2.95 | 3.27M | +1.37% |
| 2026-06-23 | 2.90 | 3.04 | 2.88 | 2.91 | 4.21M | -0.68% |
| 2026-06-22 | 2.83 | 3.04 | 2.83 | 2.93 | 5.66M | +8.52% |
| 2026-06-18 | 2.69 | 2.77 | 2.68 | 2.70 | 9.00M | +2.27% |
| 2026-06-17 | 2.65 | 2.71 | 2.62 | 2.64 | 3.53M | +0.76% |
| 2026-06-16 | 2.64 | 2.68 | 2.60 | 2.62 | 2.89M | -0.76% |
| 2026-06-15 | 2.62 | 2.68 | 2.58 | 2.64 | 3.48M | +1.15% |
| 2026-06-12 | 2.61 | 2.66 | 2.58 | 2.61 | 2.08M | +0.77% |
| 2026-06-11 | 2.61 | 2.65 | 2.57 | 2.59 | 3.40M | -0.77% |
| 2026-06-10 | 2.63 | 2.71 | 2.60 | 2.61 | 3.02M | -1.88% |
| 2026-06-09 | 2.77 | 2.80 | 2.62 | 2.66 | 3.32M | -2.56% |
| 2026-06-08 | 2.75 | 2.78 | 2.68 | 2.73 | 2.16M | +0.74% |
| 2026-06-05 | 2.88 | 2.90 | 2.69 | 2.71 | 3.11M | -7.19% |
| 2026-06-04 | 2.84 | 3.00 | 2.84 | 2.92 | 2.79M | +1.74% |
| 2026-06-03 | 2.93 | 2.95 | 2.84 | 2.87 | 3.02M | -1.03% |
| 2026-06-02 | 2.99 | 3.00 | 2.90 | 2.90 | 3.07M | -3.65% |
| 2026-06-01 | 3.02 | 3.04 | 2.93 | 3.01 | 2.24M | -1.31% |
| 2026-05-29 | 3.07 | 3.10 | 3.02 | 3.05 | 2.56M | -0.65% |
| 2026-05-28 | 2.98 | 3.13 | 2.98 | 3.07 | 3.88M | +3.02% |
| 2026-05-27 | 2.99 | 3.03 | 2.96 | 2.98 | 2.57M | +1.71% |
| 2026-05-26 | 2.91 | 3.00 | 2.89 | 2.93 | 2.12M | +1.03% |
| 2026-05-22 | 2.94 | 2.99 | 2.88 | 2.90 | 1.97M | -1.02% |
| 2026-05-21 | 2.80 | 2.93 | 2.77 | 2.93 | 3.02M | +3.90% |
| 2026-05-20 | 2.76 | 2.85 | 2.73 | 2.82 | 2.18M | +2.92% |
| 2026-05-19 | 2.80 | 2.84 | 2.73 | 2.74 | 2.51M | -2.14% |
| 2026-05-18 | 2.85 | 2.88 | 2.72 | 2.80 | 3.39M | -1.75% |
| 2026-05-15 | 2.90 | 2.94 | 2.81 | 2.85 | 2.28M | -2.40% |
| 2026-05-14 | 3.01 | 3.02 | 2.90 | 2.92 | 2.38M | -3.31% |
| 2026-05-13 | 2.98 | 3.04 | 2.89 | 3.02 | 3.36M | -1.95% |
| 2026-05-12 | 3.08 | 3.10 | 3.01 | 3.08 | 2.39M | -0.32% |
| 2026-05-11 | 3.08 | 3.22 | 3.06 | 3.09 | 2.91M | 0.00% |
| 2026-05-08 | 3.07 | 3.11 | 3.01 | 3.09 | 2.84M | +1.64% |
| 2026-05-07 | 3.23 | 3.23 | 3.00 | 3.04 | 3.68M | -6.75% |
| 2026-05-06 | 3.06 | 3.26 | 3.04 | 3.26 | 4.07M | +6.54% |
| 2026-05-05 | 3.07 | 3.15 | 3.00 | 3.06 | 3.18M | +1.32% |
| 2026-05-04 | 2.85 | 3.04 | 2.84 | 3.02 | 5.15M | +7.09% |
| 2026-05-01 | 2.59 | 2.82 | 2.56 | 2.82 | 4.83M | +8.46% |
| 2026-04-30 | 2.66 | 2.67 | 2.58 | 2.60 | 5.19M | -1.14% |
| 2026-04-29 | 2.71 | 2.73 | 2.60 | 2.63 | 4.56M | -4.01% |
| 2026-04-28 | 2.78 | 2.85 | 2.72 | 2.74 | 4.82M | -2.14% |
| 2026-04-27 | 2.85 | 2.90 | 2.75 | 2.80 | 5.48M | -1.58% |
| 2026-04-24 | 2.95 | 3.01 | 2.82 | 2.85 | 13.74M | -1.56% |
| 2026-04-23 | 3.08 | 3.16 | 2.80 | 2.89 | 30.46M | -16.71% |
| 2026-04-22 | 3.46 | 3.51 | 3.42 | 3.47 | 1.86M | +1.76% |
| 2026-04-21 | 3.56 | 3.63 | 3.40 | 3.41 | 3.21M | -4.21% |
| 2026-04-20 | 3.46 | 3.58 | 3.39 | 3.56 | 2.14M | +1.71% |
| 2026-04-17 | 3.55 | 3.60 | 3.42 | 3.50 | 2.85M | -0.28% |
| 2026-04-16 | 3.40 | 3.55 | 3.35 | 3.51 | 2.54M | +3.24% |
Intrinsic Valuation
DCF models, multiple analysis, and analyst estimates.
Historical Returns
10-year return with dividends reinvested.
DCA Calculator
See how regular investing compounds over time.
Peer Comparison
Compare growth, multiples, and margins vs sector.
ALT — Frequently Asked Questions
Quick answers to the most common questions about buying ALT stock.
How has ALT stock performed recently?
ALT declined -21.9% over the past year, below its 5-year annualized CAGR of -29.6%. The stock trades below its 200-day moving average, reflecting the downtrend.
What is ALT's all-time high price?
Altimmune, Inc. reached $137.70 on 2017-05-26. The 52-week high is $6.44. Current 1-year return of -21.9% places the stock further from historical peaks.
Where can I download ALT historical price data?
This page provides ALT daily OHLCV data with 50-day MA, 200-day MA, and RSI indicators. Data spans 2017-2026, downloadable in CSV format.