Is Atossa Therapeutics (NASDAQ:ATOS) In A Good Position To Invest In Growth?

There's no doubt that money can be made by owning shares of unprofitable businesses. For example, although Amazon.com made losses for many years after listing, if you had bought and held the shares since 1999, you would have made a fortune. But while history lauds those rare successes, those that fail are often forgotten; who remembers Pets.com?

So should Atossa Therapeutics (NASDAQ:ATOS) shareholders be worried about its cash burn? For the purpose of this article, we'll define cash burn as the amount of cash the company is spending each year to fund its growth (also called its negative free cash flow). Let's start with an examination of the business' cash, relative to its cash burn.

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How Long Is Atossa Therapeutics' Cash Runway?

A company's cash runway is calculated by dividing its cash hoard by its cash burn. As at September 2025, Atossa Therapeutics had cash of US$52m and no debt. Importantly, its cash burn was US$26m over the trailing twelve months. That means it had a cash runway of about 2.0 years as of September 2025. That's not too bad, but it's fair to say the end of the cash runway is in sight, unless cash burn reduces drastically. Depicted below, you can see how its cash holdings have changed over time.

Check out our latest analysis for Atossa Therapeutics

How Is Atossa Therapeutics' Cash Burn Changing Over Time?

Atossa Therapeutics didn't record any revenue over the last year, indicating that it's an early stage company still developing its business. Nonetheless, we can still examine its cash burn trajectory as part of our assessment of its cash burn situation. With the cash burn rate up 34% in the last year, it seems that the company is ratcheting up investment in the business over time. That's not necessarily a bad thing, but investors should be mindful of the fact that will shorten the cash runway. Clearly, however, the crucial factor is whether the company will grow its business going forward. So you might want to take a peek at how much the company is expected to grow in the next few years.

How Hard Would It Be For Atossa Therapeutics To Raise More Cash For Growth?

Given its cash burn trajectory, Atossa Therapeutics shareholders may wish to consider how easily it could raise more cash, despite its solid cash runway. Companies can raise capital through either debt or equity. One of the main advantages held by publicly listed companies is that they can sell shares to investors to raise cash and fund growth. By looking at a company's cash burn relative to its market capitalisation, we gain insight on how much shareholders would be diluted if the company needed to raise enough cash to cover another year's cash burn.

Atossa Therapeutics' cash burn of US$26m is about 29% of its US$90m market capitalisation. That's not insignificant, and if the company had to sell enough shares to fund another year's growth at the current share price, you'd likely witness fairly costly dilution.

How Risky Is Atossa Therapeutics' Cash Burn Situation?

Even though its increasing cash burn makes us a little nervous, we are compelled to mention that we thought Atossa Therapeutics' cash runway was relatively promising. Even though we don't think it has a problem with its cash burn, the analysis we've done in this article does suggest that shareholders should give some careful thought to the potential cost of raising more money in the future. Taking a deeper dive, we've spotted 3 warning signs for Atossa Therapeutics you should be aware of, and 1 of them is significant.

Of course Atossa Therapeutics may not be the best stock to buy. So you may wish to see this free collection of companies boasting high return on equity, or this list of stocks with high insider ownership.

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This article by Simply Wall St is general in nature. We provide commentary based on historical data and analyst forecasts only using an unbiased methodology and our articles are not intended to be financial advice. It does not constitute a recommendation to buy or sell any stock, and does not take account of your objectives, or your financial situation. We aim to bring you long-term focused analysis driven by fundamental data. Note that our analysis may not factor in the latest price-sensitive company announcements or qualitative material. Simply Wall St has no position in any stocks mentioned.