Regeneron Shares Head for Worst Month Since 2019 on Legal Ruling

  • Big blow came Monday with decision opening door to Amgen drug
  • Stock is still up about 19% in 2024, outpacing industry index
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Regeneron Pharmaceuticals Inc. shares are headed for their biggest monthly drop since mid-2019 after a legal setback that opens the door to an early launch of a competing therapy to the drugmaker’s blockbuster eye treatment, Eylea.

The stock is down about 12% in September and is also the worst performer in the S&P 500 Index this week. The shares edged higher on Friday after news that the company received approvalBloomberg Terminal in the US for a separate drug, and they’re still up about 19% in 2024.