Atossa Therapeutics, Inc. (ATOS)

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Atossa Therapeutics, Inc. (ATOS) is down 76.6% since the beginning of the year. At $2 per share, ATOS is trading 89.3% below its 52-week high of $19. Investors who bought $1,000 worth of ATOS shares 5 years ago would now be looking at an investment worth $46.

Atossa Therapeutics, Inc. (ATOS) has returned -76.61% so far this year and -83.23% over the past 12 months. Over the last ten years, ATOS has returned -43.97% per year, falling short of the S&P 500 Index benchmark, which averaged 13.26% annually.

Based on dividend-adjusted daily data since Nov 8, 2012, ATOS's average daily return is +0.03%, while the average monthly return is -0.65%.

Historically, 37% of months were positive and 63% were negative. The best month was Jan 2018 with a return of +207.7%, while the worst month was Oct 2013 at -68.7%. The longest winning streak lasted 4 consecutive months, and the longest losing streak was 8 months.

On a daily basis, ATOS closed higher 42% of trading days. The best single day was Mar 14, 2019 with a return of +368.2%, while the worst single day was Mar 15, 2019 at -50.4%.

Atossa Therapeutics, Inc. has an annualized alpha of -7.63%, beta of 1.08, and R2 of 0.02 versus S&P 500 Index. Calculated based on daily prices since November 08, 2012.

• This stock participated in 231.81% of S&P 500 Index downside but only -35.32% of its upside - more exposed to losses than it benefited from rallies.
• R2 of 0.02 means this stock moves largely independently of S&P 500 Index - capture ratios reflect limited market correlation rather than active downside protection. Consider using a more representative benchmark.

ATOS ranks 5 for risk / return — above 5% of stocks peers on PortfoliosLab. Its historical combined result is below most peers; review the five component ranks for context.

The Drawdowns chart displays portfolio losses from any high point along the way. Drawdowns are calculated considering price movements and all distributions paid, if any.

The table below displays the maximum drawdowns of the Atossa Therapeutics, Inc.. A maximum drawdown is a measure of risk, indicating the largest reduction in portfolio value due to a series of losing trades.

The maximum drawdown for the Atossa Therapeutics, Inc. was 99.99%, occurring on Jun 24, 2026. The portfolio has not yet recovered.

The current Atossa Therapeutics, Inc. drawdown is 99.99%.

The chart below shows the rolling one-month volatility.

The chart below illustrates the trends in the financial health of Atossa Therapeutics, Inc. over time, highlighting three key metrics: Total Revenue, Earnings Before Interest and Taxes (EBIT), and Net Income.

The Valuation section provides an overview of how Atossa Therapeutics, Inc. is priced in the market compared to other companies in the Biotechnology industry. It includes key financial ratios that help investors assess whether the stock is undervalued or overvalued.