Strong VYVGART quarter tempered by another DM trial

argenx reported third-quarter 2026 VYVGART product sales of about $1.7 billion, up 54% year over year and 13% from the prior quarter.

The main setback was dermatomyositis (DM):
although the Phase 3 ALKIVIA study showed an encouraging treatment signal, it missed its primary endpoint. The FDA wants additional confirmatory evidence, so argenx plans another registrational trial before pursuing a DM filing.

The update modestly weighed on investor sentiment, alongside concerns about operating expenses and profit. The company says it plans to submit for VYVGART Hytrulo in immune-mediated necrotizing myopathy (IMNM) by year-end 2026.

Sources:

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