Atossa Therapeutics Stock Price History
NASDAQ: ATOSHealth CareBiotechnology: Pharmaceutical PreparationsUSD
2.44+0.02 (+0.83%)
At close: Oct 9, 4:00 PM ET · Delayed 15 min
ATOS price history at a glance
The price history for Atossa Therapeutics (ATOS) on this page begins on November 5, 2012, when the stock closed at $10,935.00; it most recently closed at $2.44 on October 5, 2026. The highest price in this record is $33,480.00, reached on March 18, 2013; the latest close is 100.0% below that peak. Across the 13 complete calendar years in the table, ATOS finished higher in 4 and lower in 9. Its best year was 2021 (+68.4%) and its worst was 2017 (-81.6%).
Over roughly 14 years the share price changed -100.0%, a -45.4% compound annual price return (excluding dividends). In the last 12 months alone, ATOS has lost 84.9%. 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 2012
- $33,480.00
- Date of high
- Mar 18, 2013
- Low since 2012
- $1.70
- Date of low
- Jun 22, 2026
- 52-week high
- $17.25
- 52-week low
- $1.70
- IPO year
- 2012
- Last close
- $2.44
ATOS returns
1 week
+4.27%
1 month
+1.67%
3 months
+2.95%
6 months
-50.61%
Year to date
-72.43%
1 year
-84.94%
3 years
-75.35%
5 years
-94.31%
ATOS price return, excluding dividends.
ATOS annual returns
| Year | Year-end close | Return |
|---|---|---|
| 2026 | 2.44 | -74.18% |
| 2025 | 9.45 | -37.62% |
| 2024 | 15.15 | +14.77% |
| 2023 | 13.20 | +66.04% |
| 2022 | 7.95 | -66.88% |
| 2021 | 24.00 | +68.42% |
| 2020 | 14.25 | -40.25% |
| 2019 | 23.85 | +33.61% |
| 2018 | 17.85 | -61.86% |
| 2017 | 46.80 | -81.56% |
| 2016 | 253.80 | -70.63% |
| 2015 | 864.00 | -77.14% |
| 2014 | 3,780.00 | -35.78% |
| 2013 | 5,886.00 | -46.83% |
| 2012* | 11,070.00 | +1.23% |
* Partial year: the record begins after the start of 2012; return measured from the first available close.
2026 return is year to date.
ATOS daily prices (past year)
| Date | Open | High | Low | Close | Change |
|---|---|---|---|---|---|
| 2.45 | 2.74 | 2.12 | 2.44 | +0.83% | |
| 2.46 | 2.48 | 2.39 | 2.42 | -1.63% | |
| 2.41 | 2.49 | 2.41 | 2.46 | +0.41% | |
| 2.46 | 2.54 | 2.43 | 2.45 | 0.00% | |
| 2.38 | 2.50 | 2.34 | 2.45 | +4.70% | |
| 2.23 | 2.38 | 2.17 | 2.34 | +3.08% | |
| 1.96 | 2.30 | 1.96 | 2.27 | +16.41% | |
| 1.99 | 2.15 | 1.95 | 1.95 | -2.01% | |
| 2.06 | 2.16 | 1.96 | 1.99 | +1.53% | |
| 1.91 | 2.04 | 1.82 | 1.96 | +3.16% | |
| 2.06 | 2.07 | 1.89 | 1.90 | -7.32% | |
| 2.15 | 2.22 | 2.05 | 2.05 | -5.96% | |
| 2.25 | 2.26 | 2.15 | 2.18 | -3.54% | |
| 2.25 | 2.43 | 2.25 | 2.26 | +0.44% | |
| 2.25 | 2.39 | 2.25 | 2.25 | +1.35% | |
| 2.37 | 2.38 | 2.22 | 2.22 | -7.50% | |
| 2.42 | 2.43 | 2.37 | 2.40 | -0.83% | |
| 2.39 | 2.48 | 2.39 | 2.42 | +2.11% | |
| 2.48 | 2.49 | 2.37 | 2.37 | -4.44% | |
| 2.53 | 2.56 | 2.45 | 2.48 | -1.20% | |
| 2.36 | 2.54 | 2.36 | 2.51 | +7.26% | |
| 2.36 | 2.61 | 2.33 | 2.34 | -2.50% | |
| 2.54 | 2.54 | 2.40 | 2.40 | -4.76% | |
| 2.49 | 2.59 | 2.44 | 2.52 | 0.00% | |
| 2.51 | 2.60 | 2.50 | 2.52 | -0.40% | |
| 2.50 | 2.60 | 2.46 | 2.53 | +2.85% | |
| 2.40 | 2.51 | 2.39 | 2.46 | +1.65% | |
| 2.48 | 2.50 | 2.32 | 2.42 | -3.20% | |
| 2.57 | 2.59 | 2.50 | 2.50 | -3.10% | |
| 2.62 | 2.62 | 2.50 | 2.58 | -2.27% | |
| 2.64 | 2.69 | 2.58 | 2.64 | -0.38% | |
| 2.66 | 2.70 | 2.61 | 2.65 | -1.12% | |
| 2.62 | 2.69 | 2.58 | 2.68 | +1.52% | |
| 2.56 | 2.65 | 2.45 | 2.64 | +3.94% | |
| 2.59 | 2.62 | 2.51 | 2.54 | -1.93% | |
| 2.62 | 2.62 | 2.44 | 2.59 | -1.89% | |
| 2.57 | 2.76 | 2.55 | 2.64 | +1.93% | |
| 2.77 | 2.78 | 2.57 | 2.59 | -7.17% | |
| 2.62 | 2.97 | 2.55 | 2.79 | +7.31% | |
| 2.54 | 2.69 | 2.43 | 2.60 | +1.56% | |
| 2.36 | 2.56 | 2.36 | 2.56 | +8.94% | |
| 2.32 | 2.37 | 2.27 | 2.35 | -0.42% | |
| 2.39 | 2.45 | 2.27 | 2.36 | -0.42% | |
| 2.26 | 2.45 | 2.26 | 2.37 | +0.42% | |
| 2.37 | 2.45 | 2.24 | 2.36 | -2.48% | |
| 2.39 | 2.44 | 2.26 | 2.42 | +1.26% | |
| 2.37 | 2.39 | 2.27 | 2.39 | +3.46% | |
| 2.18 | 2.34 | 2.18 | 2.31 | +6.45% | |
| 2.10 | 2.19 | 2.07 | 2.17 | +4.83% | |
| 2.19 | 2.19 | 2.05 | 2.07 | -5.48% | |
| 2.29 | 2.30 | 2.18 | 2.19 | -5.19% | |
| 2.37 | 2.39 | 2.28 | 2.31 | -4.55% | |
| 2.36 | 2.49 | 2.33 | 2.42 | +2.54% | |
| 2.30 | 2.45 | 2.30 | 2.36 | +2.61% | |
| 2.41 | 2.46 | 2.25 | 2.30 | -4.56% | |
| 2.44 | 2.55 | 2.41 | 2.41 | -0.82% | |
| 2.43 | 2.49 | 2.37 | 2.43 | +1.25% | |
| 2.46 | 2.60 | 2.39 | 2.40 | -3.61% | |
| 2.48 | 2.58 | 2.40 | 2.49 | 0.00% | |
| 2.39 | 2.50 | 2.27 | 2.49 | +4.18% | |
| 2.42 | 2.46 | 2.34 | 2.39 | -2.05% | |
| 2.29 | 2.44 | 2.23 | 2.44 | +7.96% | |
| 2.35 | 2.36 | 2.23 | 2.26 | -5.83% | |
| 2.37 | 2.42 | 2.21 | 2.40 | +1.27% | |
| 2.37 | 2.39 | 2.22 | 2.37 | +0.42% | |
| 2.42 | 2.42 | 2.27 | 2.36 | -3.67% | |
| 2.51 | 2.54 | 2.38 | 2.45 | -1.61% | |
| 2.37 | 2.60 | 2.19 | 2.49 | +9.21% | |
| 2.14 | 2.41 | 2.14 | 2.28 | +7.55% | |
| 2.03 | 2.19 | 2.03 | 2.12 | +3.92% | |
| 1.95 | 2.06 | 1.92 | 2.04 | +5.70% | |
| 1.98 | 2.01 | 1.93 | 1.93 | -2.53% | |
| 1.90 | 2.04 | 1.89 | 1.98 | +5.32% | |
| 1.76 | 1.91 | 1.73 | 1.88 | +6.21% | |
| 1.77 | 1.78 | 1.70 | 1.77 | +1.14% | |
| 1.89 | 1.89 | 1.75 | 1.75 | -7.89% | |
| 1.82 | 1.96 | 1.78 | 1.90 | +3.83% | |
| 2.03 | 2.03 | 1.81 | 1.83 | -8.96% | |
| 2.01 | 2.03 | 1.95 | 2.01 | +1.01% | |
| 2.21 | 2.21 | 1.95 | 1.99 | -10.36% | |
| 2.36 | 2.38 | 2.16 | 2.22 | -5.53% | |
| 2.51 | 2.51 | 2.31 | 2.35 | -4.47% | |
| 2.57 | 2.70 | 2.45 | 2.46 | -5.02% | |
| 2.81 | 2.81 | 2.52 | 2.59 | -41.14% | |
| 4.39 | 4.59 | 4.36 | 4.40 | -0.23% | |
| 4.55 | 4.59 | 4.36 | 4.41 | -3.08% | |
| 4.56 | 4.56 | 4.35 | 4.55 | +1.79% | |
| 4.78 | 4.80 | 4.40 | 4.47 | -7.84% | |
| 4.67 | 4.87 | 4.65 | 4.85 | +3.19% | |
| 4.80 | 4.80 | 4.68 | 4.70 | -3.09% | |
| 5.06 | 5.15 | 4.80 | 4.85 | -5.09% | |
| 5.14 | 5.20 | 4.93 | 5.11 | -2.29% | |
| 5.21 | 5.30 | 5.00 | 5.23 | +0.77% | |
| 5.19 | 5.25 | 4.98 | 5.19 | +1.37% | |
| 4.95 | 5.18 | 4.86 | 5.12 | +3.43% | |
| 4.95 | 5.06 | 4.86 | 4.95 | -0.20% | |
| 4.93 | 5.10 | 4.84 | 4.96 | -0.20% | |
| 4.79 | 5.06 | 4.66 | 4.97 | +2.69% | |
| 4.71 | 4.96 | 4.66 | 4.84 | +1.89% | |
| 4.80 | 4.92 | 4.66 | 4.75 | -0.63% | |
| 4.85 | 4.95 | 4.70 | 4.78 | -1.44% | |
| 5.11 | 5.11 | 4.85 | 4.85 | -5.83% | |
| 5.16 | 5.16 | 4.95 | 5.15 | -0.19% | |
| 5.23 | 5.31 | 5.15 | 5.16 | 0.00% | |
| 5.43 | 5.43 | 5.08 | 5.16 | -6.18% | |
| 5.58 | 5.71 | 5.45 | 5.50 | -1.79% | |
| 5.42 | 5.65 | 5.42 | 5.60 | -1.23% | |
| 5.81 | 5.83 | 5.61 | 5.67 | -2.24% | |
| 5.53 | 5.89 | 5.49 | 5.80 | +3.94% | |
| 5.86 | 6.18 | 5.24 | 5.58 | -4.78% | |
| 5.33 | 5.97 | 5.33 | 5.86 | +9.94% | |
| 5.43 | 5.43 | 5.16 | 5.33 | -0.74% | |
| 5.28 | 5.46 | 5.19 | 5.37 | +1.70% | |
| 5.47 | 5.51 | 5.21 | 5.28 | -3.83% | |
| 5.49 | 5.74 | 5.32 | 5.49 | +0.73% | |
| 5.68 | 5.78 | 5.32 | 5.45 | -4.39% | |
| 5.73 | 5.80 | 5.54 | 5.70 | -0.52% | |
| 5.93 | 5.93 | 5.61 | 5.73 | -3.70% | |
| 5.87 | 6.02 | 5.75 | 5.95 | +3.12% | |
| 6.20 | 6.20 | 5.76 | 5.77 | -6.48% | |
| 5.83 | 6.28 | 5.80 | 6.17 | +5.83% | |
| 5.81 | 5.94 | 5.67 | 5.83 | +1.04% | |
| 5.64 | 5.78 | 5.52 | 5.77 | +0.52% | |
| 5.37 | 5.76 | 5.35 | 5.74 | +7.29% | |
| 5.30 | 5.44 | 5.23 | 5.35 | +0.75% | |
| 4.92 | 5.36 | 4.92 | 5.31 | +7.49% | |
| 4.99 | 4.99 | 4.81 | 4.94 | -0.80% | |
| 4.84 | 5.05 | 4.73 | 4.98 | +3.32% | |
| 5.08 | 5.14 | 4.73 | 4.82 | -1.23% | |
| 5.15 | 5.15 | 4.70 | 4.88 | -5.24% | |
| 5.41 | 5.41 | 5.10 | 5.15 | -4.10% | |
| 5.01 | 5.56 | 5.00 | 5.37 | +5.09% | |
| 5.27 | 5.36 | 5.03 | 5.11 | -2.85% | |
| 4.77 | 5.26 | 4.77 | 5.26 | +11.68% | |
| 4.79 | 4.87 | 4.59 | 4.71 | -0.21% | |
| 4.60 | 4.93 | 4.60 | 4.72 | +0.21% | |
| 5.19 | 5.47 | 4.64 | 4.71 | -13.10% | |
| 5.57 | 6.09 | 5.40 | 5.42 | -1.63% | |
| 5.61 | 5.69 | 5.39 | 5.51 | -1.78% | |
| 5.37 | 5.71 | 5.35 | 5.61 | +5.25% | |
| 5.17 | 5.98 | 5.12 | 5.33 | +3.90% | |
| 5.11 | 5.35 | 4.97 | 5.13 | +0.39% | |
| 5.50 | 5.53 | 5.10 | 5.11 | -6.92% | |
| 4.98 | 5.57 | 4.98 | 5.49 | +10.46% | |
| 5.06 | 5.18 | 4.90 | 4.97 | -0.80% | |
| 5.08 | 5.23 | 4.95 | 5.01 | -0.79% | |
| 4.73 | 5.38 | 4.71 | 5.05 | +5.65% | |
| 4.73 | 4.85 | 4.61 | 4.78 | 0.00% | |
| 4.58 | 4.87 | 4.56 | 4.78 | +4.60% | |
| 4.53 | 4.60 | 4.36 | 4.57 | +0.88% | |
| 4.56 | 4.67 | 4.44 | 4.53 | -3.21% | |
| 4.92 | 5.01 | 4.52 | 4.68 | -4.88% | |
| 4.79 | 5.12 | 4.71 | 4.92 | +4.24% | |
| 4.54 | 4.91 | 4.31 | 4.72 | +4.89% | |
| 4.35 | 4.55 | 4.23 | 4.50 | +1.58% | |
| 4.43 | 4.59 | 4.35 | 4.43 | -0.89% | |
| 4.36 | 4.60 | 4.30 | 4.47 | +4.68% | |
| 4.23 | 4.44 | 4.15 | 4.27 | +1.43% | |
| 4.01 | 4.27 | 4.00 | 4.21 | +6.31% | |
| 4.11 | 4.15 | 3.84 | 3.96 | -5.94% | |
| 4.38 | 4.48 | 4.15 | 4.21 | -4.75% | |
| 4.35 | 4.55 | 4.20 | 4.42 | +1.84% | |
| 4.06 | 4.59 | 4.06 | 4.34 | +4.58% | |
| 4.14 | 4.20 | 3.97 | 4.15 | -1.19% | |
| 3.92 | 4.44 | 3.91 | 4.20 | +6.60% | |
| 4.05 | 4.15 | 3.76 | 3.94 | -2.72% | |
| 4.76 | 4.77 | 4.03 | 4.05 | -15.98% | |
| 4.91 | 5.05 | 4.80 | 4.82 | -3.41% | |
| 5.32 | 5.33 | 4.78 | 4.99 | -6.55% | |
| 5.33 | 5.54 | 5.21 | 5.34 | +0.19% | |
| 5.03 | 5.47 | 5.01 | 5.33 | +0.76% | |
| 5.41 | 5.51 | 4.92 | 5.29 | -4.34% | |
| 5.60 | 5.85 | 4.91 | 5.53 | -1.07% | |
| 7.23 | 7.56 | 5.40 | 5.59 | -34.62% | |
| 9.00 | 9.00 | 7.95 | 8.55 | -5.00% | |
| 9.30 | 9.30 | 8.55 | 9.00 | -3.23% | |
| 10.05 | 10.35 | 9.15 | 9.30 | -8.82% | |
| 10.50 | 10.95 | 9.90 | 10.20 | -1.45% | |
| 9.45 | 10.65 | 9.00 | 10.35 | +7.81% | |
| 9.90 | 9.90 | 9.45 | 9.60 | -1.54% | |
| 9.30 | 9.90 | 8.85 | 9.75 | +8.33% | |
| 9.00 | 9.30 | 8.85 | 9.00 | 0.00% | |
| 9.90 | 9.90 | 8.70 | 9.00 | -3.23% | |
| 9.15 | 9.60 | 8.85 | 9.30 | +6.90% | |
| 9.15 | 9.15 | 8.55 | 8.70 | -3.33% | |
| 9.45 | 9.45 | 9.00 | 9.00 | -6.25% | |
| 9.90 | 10.05 | 9.45 | 9.60 | -1.54% | |
| 9.60 | 9.90 | 9.30 | 9.75 | 0.00% | |
| 9.90 | 10.05 | 9.45 | 9.75 | 0.00% | |
| 10.05 | 10.20 | 9.60 | 9.75 | -2.99% | |
| 10.05 | 10.50 | 9.90 | 10.05 | +1.52% | |
| 9.15 | 10.20 | 9.15 | 9.90 | +6.45% | |
| 9.75 | 9.75 | 9.00 | 9.30 | -1.59% | |
| 8.85 | 9.45 | 8.85 | 9.45 | +6.78% | |
| 9.00 | 9.15 | 8.25 | 8.85 | -4.84% | |
| 9.75 | 9.75 | 9.30 | 9.30 | -6.06% | |
| 9.60 | 10.35 | 9.60 | 9.90 | 0.00% | |
| 10.20 | 10.35 | 9.75 | 9.90 | -4.35% | |
| 10.20 | 10.50 | 10.05 | 10.35 | +1.47% | |
| 10.50 | 10.65 | 10.05 | 10.20 | -5.56% | |
| 10.95 | 11.25 | 10.65 | 10.80 | -1.37% | |
| 10.65 | 11.10 | 10.50 | 10.95 | +4.29% | |
| 10.65 | 11.10 | 10.50 | 10.50 | -1.41% | |
| 11.10 | 11.25 | 10.65 | 10.65 | -1.39% | |
| 10.50 | 11.10 | 10.50 | 10.80 | +1.41% | |
| 11.10 | 11.55 | 10.50 | 10.65 | -14.46% | |
| 13.20 | 13.65 | 12.30 | 12.45 | -7.78% | |
| 14.40 | 14.85 | 13.35 | 13.50 | +5.88% | |
| 12.30 | 13.05 | 12.00 | 12.75 | +4.94% | |
| 11.70 | 12.30 | 11.70 | 12.15 | +3.85% | |
| 12.30 | 12.30 | 11.55 | 11.70 | -2.50% | |
| 11.70 | 12.15 | 11.55 | 12.00 | +5.26% | |
| 11.10 | 11.55 | 10.95 | 11.40 | +2.70% | |
| 10.65 | 11.10 | 10.50 | 11.10 | +5.71% | |
| 10.95 | 11.25 | 10.20 | 10.50 | -5.41% | |
| 11.85 | 12.00 | 11.10 | 11.10 | -5.13% | |
| 11.85 | 11.85 | 11.55 | 11.70 | 0.00% | |
| 11.70 | 12.15 | 11.55 | 11.70 | +1.30% | |
| 11.40 | 11.70 | 11.25 | 11.55 | +2.67% | |
| 12.00 | 12.30 | 11.25 | 11.25 | -3.85% | |
| 11.25 | 11.70 | 11.10 | 11.70 | +4.00% | |
| 11.40 | 12.00 | 11.25 | 11.25 | -1.32% | |
| 11.85 | 12.00 | 11.40 | 11.40 | -3.80% | |
| 11.55 | 12.30 | 11.55 | 11.85 | 0.00% | |
| 12.15 | 12.75 | 11.55 | 11.85 | -1.25% | |
| 11.85 | 12.30 | 11.70 | 12.00 | 0.00% | |
| 12.00 | 12.45 | 11.55 | 12.00 | -1.23% | |
| 12.45 | 12.75 | 11.85 | 12.15 | -2.41% | |
| 12.60 | 12.75 | 12.15 | 12.45 | -1.19% | |
| 12.45 | 13.20 | 12.45 | 12.60 | +2.44% | |
| 12.00 | 12.45 | 11.70 | 12.30 | +1.23% | |
| 12.45 | 12.60 | 12.15 | 12.15 | -2.41% | |
| 12.60 | 12.75 | 12.45 | 12.45 | -2.35% | |
| 12.90 | 13.35 | 12.60 | 12.75 | -1.16% | |
| 13.50 | 13.65 | 12.75 | 12.90 | -3.37% | |
| 13.05 | 13.65 | 13.05 | 13.35 | +1.14% | |
| 13.05 | 13.50 | 12.90 | 13.20 | 0.00% | |
| 13.95 | 14.10 | 12.90 | 13.20 | -6.38% | |
| 14.10 | 14.40 | 13.95 | 14.10 | 0.00% | |
| 13.95 | 14.40 | 13.80 | 14.10 | +1.08% | |
| 13.80 | 14.10 | 13.65 | 13.95 | +1.09% | |
| 13.95 | 14.25 | 13.50 | 13.80 | 0.00% | |
| 14.55 | 14.55 | 13.50 | 13.80 | -4.17% | |
| 15.00 | 15.30 | 14.40 | 14.40 | -4.95% | |
| 15.00 | 15.15 | 14.70 | 15.15 | +3.06% | |
| 15.15 | 15.45 | 14.25 | 14.70 | -4.85% | |
| 15.75 | 16.50 | 15.00 | 15.45 | -1.90% | |
| 15.60 | 16.20 | 15.45 | 15.75 | +1.94% | |
| 15.30 | 15.90 | 14.40 | 15.45 | -1.90% | |
| 16.80 | 17.25 | 15.60 | 15.75 | -2.78% | |
| 17.55 | 18.00 | 15.75 | 16.20 | — |
Prices are adjusted for stock splits. See adjusted closing price for how dividends and splits affect history, and the ATOS chart for longer ranges.