Thinking of Buying CRISPR Therapeutics Stock? Watch These 2 Key Numbers

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Biotechs like CRISPR Therapeutics (NASDAQ: CRSP) can be tricky to invest in, as it isn't always obvious whether management's plans are working or not. Simply focusing on a big-picture figure like revenue often misses key points about what the company has done and where it's going.

On that note, CRISPR's Q3 earnings will be reported sometime between Nov. 4 and Nov. 8 at the latest. When those results come out, investors should pay particular attention to two all-important numbers that will determine how it performs in the near term and beyond. Let's take a beat to understand both so that you'll get a clearer signal of whether buying this stock is the right move or not.

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Building out treatment infrastructure is necessary for revenue growth

As you may have heard, CRISPR recently got approval for its first product, a gene therapy called Casgevy, which treats sickle cell disease (SCD) as well as beta-thalassemia. In the long run, with some additional research and development (R&D) investment to increase the size of the therapy's addressable market, management calculates that upwards of 166,000 patients in the U.S. and E.U. could be eligible for treatment.

It's fairly straightforward to appreciate that the number of patients actually treated is a very important figure to keep track of from an investment standpoint. Without treating patients, there's no way to realize revenue from sales of the medicine.

At the time of its Q2 earnings release, CRISPR had started treatment of just 20 patients, so it had no revenue to speak of. But Casgevy isn't a medicine that's simple to manufacture. Patients need to donate their own cells, undergo a chemical conditioning regimen, and wait for the company to modify their cells at an external manufacturing site before they can receive the treatment.

The process takes weeks and may also be burdensome to prospective patients, as it involves a hospital stay. Seeing some social proof in the form of a population of patients who have successfully been treated may help to convince others to take the plunge, which is why the pace of treating new patients is worth paying attention to.

Furthermore, the touchpoints that involve the patient have to occur at authorized treatment centers (ATCs) set up by the company and its collaborator, Vertex Pharmaceuticals. As of the second quarter's close, there were 35 operational ATCs. By the end of 2024, it aims to have 50 ATCs up and running in the U.S. and 25 in the E.U. And that's just one reason why the number of ATCs relative to management's goal is another key number to watch.