Biogen Inc

BIIB: XNAS (USA)

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Biogen and Ionis: Mixed Phase 2 Data for Alzheimer's Disease Candidate

Jay Lee , Rachel Elfman

Jul 15, 2026

Biogen and Ionis reported nuanced phase 2 data for diranersen in early Alzheimer's disease at the Alzheimer's Association International Conference, which sent shares down 8% and 3%, respectively, on July 14. Biogen holds global commercialization rights, while Ionis is eligible for tiered royalties.

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Biogen Inc

Biogen and Ionis: Mixed Phase 2 Data for Alzheimer's Disease Candidate

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