We Think Rapid Micro Biosystems (NASDAQ:RPID) Needs To Drive Business Growth Carefully

We can readily understand why investors are attracted to unprofitable companies. By way of example, Rapid Micro Biosystems (NASDAQ:RPID) has seen its share price rise 462% over the last year, delighting many shareholders. But the harsh reality is that very many loss making companies burn through all their cash and go bankrupt.

So notwithstanding the buoyant share price, we think it's well worth asking whether Rapid Micro Biosystems' cash burn is too risky. In this article, we define cash burn as its annual (negative) free cash flow, which is the amount of money a company spends each year to fund its growth. The first step is to compare its cash burn with its cash reserves, to give us its 'cash runway'.

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Does Rapid Micro Biosystems Have A Long Cash Runway?

You can calculate a company's cash runway by dividing the amount of cash it has by the rate at which it is spending that cash. In March 2025, Rapid Micro Biosystems had US$42m in cash, and was debt-free. Importantly, its cash burn was US$39m over the trailing twelve months. That means it had a cash runway of around 13 months as of March 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. The image below shows how its cash balance has been changing over the last few years.

See our latest analysis for Rapid Micro Biosystems

How Well Is Rapid Micro Biosystems Growing?

On balance, we think it's mildly positive that Rapid Micro Biosystems trimmed its cash burn by 15% over the last twelve months. On top of that, operating revenue was up 28%, making for a heartening combination Considering the factors above, the company doesn’t fare badly when it comes to assessing how it is changing over time. Clearly, however, the crucial factor is whether the company will grow its business going forward. For that reason, it makes a lot of sense to take a look at our analyst forecasts for the company.

Can Rapid Micro Biosystems Raise More Cash Easily?

Rapid Micro Biosystems seems to be in a fairly good position, in terms of cash burn, but we still think it's worthwhile considering how easily it could raise more money if it wanted to. 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.

Rapid Micro Biosystems' cash burn of US$39m is about 26% of its US$149m 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.

So, Should We Worry About Rapid Micro Biosystems' Cash Burn?

Even though its cash burn relative to its market cap makes us a little nervous, we are compelled to mention that we thought Rapid Micro Biosystems' revenue growth was relatively promising. We don't think its cash burn is particularly problematic, but after considering the range of factors in this article, we do think shareholders should be monitoring how it changes over time. Its important for readers to be cognizant of the risks that can affect the company's operations, and we've picked out 2 warning signs for Rapid Micro Biosystems that investors should know when investing in the stock.

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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.