Biogen's stock surged 5.13% during intraday trading on Friday, as investors reacted positively to the company's latest financial results and future guidance.
The biotechnology firm reported fourth-quarter 2025 adjusted earnings per share of $1.99, significantly surpassing the consensus estimate of $1.59. Quarterly revenue reached $2.28 billion, also beating expectations of $2.20 billion. More importantly, Biogen provided 2026 adjusted EPS guidance of $15.25 to $16.25, which is above Wall Street's average estimate of $14.92.
The stronger-than-expected profit outlook is driven by several factors: continued cost-cutting measures under CEO Christopher Viehbacher, growing sales of newer drugs including the Alzheimer's treatment Leqembi (which saw Q4 sales of approximately $134 million, up 54% year-over-year), and disciplined expense management that is helping offset declining sales from the company's mature multiple sclerosis franchise.