Is Aura Biosciences (NASDAQ:AURA) In A Good Position To Deliver On Growth Plans?

Just because a business does not make any money, does not mean that the stock will go down. For example, although software-as-a-service business Salesforce.com lost money for years while it grew recurring revenue, if you held shares since 2005, you'd have done very well indeed. But while history lauds those rare successes, those that fail are often forgotten; who remembers Pets.com?

Given this risk, we thought we'd take a look at whether Aura Biosciences (NASDAQ:AURA) shareholders should 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). The first step is to compare its cash burn with its cash reserves, to give us its 'cash runway'.

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When Might Aura Biosciences Run Out Of Money?

A company's cash runway is calculated by dividing its cash hoard by its cash burn. As at September 2025, Aura Biosciences had cash of US$162m and no debt. Importantly, its cash burn was US$89m over the trailing twelve months. That means it had a cash runway of around 22 months as of September 2025. While that cash runway isn't too concerning, sensible holders would be peering into the distance, and considering what happens if the company runs out of cash. Depicted below, you can see how its cash holdings have changed over time.

See our latest analysis for Aura Biosciences

How Is Aura Biosciences' Cash Burn Changing Over Time?

Because Aura Biosciences isn't currently generating revenue, we consider it an early-stage 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 19% in the last year, it seems that the company is ratcheting up investment in the business over time. However, the company's true cash runway will therefore be shorter than suggested above, if spending continues to increase. While the past is always worth studying, it is the future that matters most of all. For that reason, it makes a lot of sense to take a look at our analyst forecasts for the company.

Can Aura Biosciences Raise More Cash Easily?

While Aura Biosciences does have a solid cash runway, its cash burn trajectory may have some shareholders thinking ahead to when the company may need to raise more cash. Issuing new shares, or taking on debt, are the most common ways for a listed company to raise more money for its business. 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.

Aura Biosciences has a market capitalisation of US$349m and burnt through US$89m last year, which is 25% of the company's market value. That's fairly notable cash burn, so if the company had to sell shares to cover the cost of another year's operations, shareholders would suffer some costly dilution.

Is Aura Biosciences' Cash Burn A Worry?

On this analysis of Aura Biosciences' cash burn, we think its cash runway was reassuring, while its increasing cash burn has us a bit worried. 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. On another note, we conducted an in-depth investigation of the company, and identified 4 warning signs for Aura Biosciences (1 is potentially serious!) that you should be aware of before investing here.

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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.