3 Top Biotech Stocks to Add to Your Watchlist

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Biotech investing isn't for the faint of heart. The odds that any particular candidate treatment will be a success are low, and commercializing a drug is hard. However, the returns can be amazing when everything goes according to plan.

We asked a team of Motley Fool contributors to share the names of some biotech stocks that they think are worth the risk. Here's why they called out Alexion Pharmaceuticals (NASDAQ: ALXN), Regeneron Pharmaceuticals (NASDAQ: REGN), and Ionis Pharmaceuticals (NASDAQ: IONS).

Pills arranged to look like a dollar sign.
Pills arranged to look like a dollar sign.

Image source: Getty Images.

Rare disease treatments can bring big rewards

Sean Williams (Alexion Pharmaceuticals): If you're looking for a truly out-of-the-ordinary biotech stock to invest in, you should consider ultra-rare-disease drugmaker Alexion Pharmaceuticals.

For more than a decade, Soliris has been Alexion's breadwinner. Soliris is an orphan drug that's been approved to treat paroxysmal nocturnal hemoglobinuria (PNH), atypical hemolytic uremic syndrome, and most recently anti-acetylcholine receptor antibody-positive generalized myasthenia gravis. Even if you've never heard of these diseases before, the thing to know about Alexion is that there's virtually no brand-name competition waiting in the wings for these indications. The company will therefore able to maintain an exceptionally high price point on Soliris, and insurers will continue to reimburse for it. Its orphan status, along with label expansion and steady organic volume growth, has been the key to growing Soliris into a more than $3 billion a year treatment.

Now, here's the best part: Despite persistent concerns that generic-drug developers would attempt to swoop in on Soliris once its patents expired, Alexion has fixed that problem. In late December, the company received Food and Drug Administration approval for Ultomiris, which is a next-generation treatment for PNH that is given six or seven times annually, as opposed to bi-weekly with Soliris. In other words, Alexion will slowly phase out its key drug in favor of Ultomiris in most indications, as well as look to expand its label.

As icing on the cake, Alexion's Strensiq and Kanuma continue to gain larger audiences. Strensiq, which treats perinatal/infantile, or juvenile-onset hypophosphatasia, and Kanuma, a treatment for lysosomal acid lipase deficiency, are expected to produce between $655 million and $680 million in combined 2019 sales, with longer-term sales growth potential in the high single-digit percentages annually.

With aggregate sales projected to grow by more than 50% between 2018 and 2022, and earnings possibly on track to hit $13 per share by 2022, Alexion's shares today could be an exceptional bargain in the rare-disease space.