Biogen Hits 52-Week High, Alzheimer's Drug Sales Jump

Core Insights - Biogen Inc. reported better-than-expected fourth-quarter earnings with adjusted EPS of $1.99, surpassing the consensus estimate of $1.59 [1] - The company generated revenues of $2.28 billion, exceeding the consensus of $2.20 billion, although this represents a 7% decline on both a reported and constant currency basis [1] Drug Performance - Fiscal 2025 revenue from growth products increased by 19% year-over-year, which helped offset the decline in revenue from multiple sclerosis products, excluding Vumerity [2] - Leqembi, an Alzheimer's drug, generated collaboration revenue of $47 million, with in-market sales reaching approximately $134 million, reflecting a 54% increase [3] - Multiple sclerosis revenue totaled $917 million, down 14% year-over-year (15% decline on a constant currency basis), with Tysabri sales decreasing from $415.4 million to $397.5 million [3] Rare Disease Revenue - Revenue from rare diseases decreased by 4% year-over-year to $514.6 million, with Spinraza's revenue declining from $421.4 million to $356.2 million [4] - Spinraza's fourth-quarter revenue fell by 15% year-over-year, influenced by shipment timing outside the U.S., while full-year revenue was down 2% [4] New Product Contributions - Skyclarys, a drug for Friedreich's ataxia, reported revenues of $133.4 million during the quarter, up from $102.2 million a year ago [5] - Skyclarys saw a 30% increase in global patients on therapy in 2025, with U.S. revenue of approximately $89 million driven by demand growth [6] - Zurzuvae, a postpartum depression drug, achieved fourth-quarter revenue of approximately $66 million, indicating strong demand growth [6] - Vumerity's revenue grew by 3% year-over-year in the fourth quarter to $181.1 million [6] Management Commentary - The President and CEO of Biogen highlighted that the 2025 performance was driven by nearly $1 billion in revenue from LEQEMBI, SKYCLARYS, ZURZUVAE, and QALSODY, along with pipeline progression and the resilience of the MS franchise [7]