Alector Announces Topline Results from Latozinemab Phase 3 Trial in Individuals with Frontotemporal Dementia Due to a GRN Mutation and Provides Business Update

Core Insights - Alector, Inc. announced that its Phase 3 INFRONT-3 clinical trial of latozinemab (AL001) for frontotemporal dementia due to a progranulin gene mutation did not meet its primary clinical endpoint, although it showed a significant effect on plasma progranulin biomarker levels [2][3][14] Company Updates - The INFRONT-3 trial was a 96-week, double-blind study that failed to demonstrate clinical benefits in slowing disease progression, leading to the discontinuation of the open-label extension and continuation study for latozinemab [2][3] - Alector's pipeline includes ongoing collaboration with GSK on nivisnebart (AL101/GSK4527226) in a Phase 2 trial for early Alzheimer's disease, with completion expected in 2026 [6] - Alector is advancing multiple preclinical programs, including AL137 for anti-amyloid beta therapy and AL050 for enzyme replacement therapy in Parkinson's disease, with IND submissions targeted for 2026 and 2027 respectively [8][9] - The company is also developing a proprietary blood-brain barrier technology platform, Alector Brain Carrier (ABC), aimed at enhancing therapeutic delivery to the brain [7][17] Leadership and Workforce Changes - Alector is reducing its workforce by approximately 49% to focus resources on high-priority programs [10][11] - Sara Kenkare-Mitra, President and Head of R&D, will resign effective December 22, 2025, after contributing significantly to the company's R&D efforts [12][13] Financial Position - As of September 30, 2025, Alector reported approximately $291.1 million in cash and equivalents, expected to fund operations through 2027 [13]