Question · Q4 2025
Alexandria Hammond asked about the expected cadence of Leqembi sales growth for the year, specifically inquiring about the timing and percentage of patients likely to transition to maintenance therapy and its subsequent impact on revenue.
Answer
Christopher A. Viehbacher, President and CEO, Biogen, explained that while clear data on maintenance patients is limited, persistency data suggests about 70% continue therapy. He anticipates continued sequential quarter-on-quarter growth, driven by increased blood-based diagnostics use, growing neurologist adoption, and strong direct-to-consumer advertising. He noted potential acceleration in late 2026 or 2027 with full reimbursement for the subcutaneous pen.
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