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argenx Provides Update on Phase 3 UNITY Study of Efgartigimod SC in Sjögren's Disease

An independent monitoring board said the study was unlikely to meet its main goal, and Argenx shares fell 16%, wiping out €8.5 billion in value.

  • On Thursday, Argenx discontinued its late-stage Phase 3 study of Vyvgart in adults with Sjögren's disease, an autoimmune condition that damages moisture-producing glands, after an interim analysis deemed the trial unlikely to meet its primary endpoint.
  • An independent monitoring board recommended ending the study "for futility" after concluding the drug was unlikely to meet its primary efficacy endpoint, noting Sjögren's currently has no approved treatments.
  • Argenx shares fell 16% on Thursday, wiping $9.5 billion from market value, though the biotech maintains a market cap of around $50 billion even after the decline.
  • William Blair analyst Matt Phipps noted the failure removes a "blockbuster expansion opportunity" for Vyvgart, while competitors Novartis and Amgen reported successful late-stage trial results for the condition.
  • Investors are now focusing on Argenx's pipeline assets, including a celiac disease treatment acquired through the $2.2 billion Forte Biosciences takeover, for which analyst Yaron Werber models $988 million in peak sales.
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Biopaharma must stop the development of its drug Vyvgart and dive into the Stock Exchange, driving the Bel 20 down. ...

·Brussels, Belgium
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Post Register broke the news on Thursday, October 8, 2026.
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