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Alector (ALEC) investor relations material

Alector Q3 2025 earnings summary

Complete event summary combining all related documents: earnings call transcript, report, and slide presentation.
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Q3 2025 earnings summary6 Nov, 2025

Executive summary

  • Focused on developing therapies for neurodegenerative diseases, leveraging proprietary blood-brain barrier technology and a robust clinical and preclinical pipeline, including lead candidates AL137 and AL050 advancing toward IND filings in 2026 and 2027.

  • Announced negative topline results for the Phase 3 INFRONT-3 trial of latozinemab in FTD-GRN, leading to discontinuation of related studies and a 47% workforce reduction in October 2025.

  • Nivisnebart (AL101) remains in Phase 2 development for Alzheimer's disease, with trial enrollment completed in April 2025 and interim analysis planned for 1H 2026.

  • ABC platform enables efficient brain delivery of antibodies, enzymes, and siRNA, with robust preclinical results supporting further development.

  • Cash, cash equivalents, and marketable securities of $291.1 million as of September 30, 2025, expected to fund operations through 2027.

Financial highlights

  • Collaboration revenue was $3.3 million for Q3 2025, down from $15.3 million in Q3 2024, due to completion of certain performance obligations.

  • Net loss for Q3 2025 was $34.7 million ($0.34 per share), compared to $42.2 million ($0.43 per share) in Q3 2024.

  • Research and development expenses decreased to $29.4 million in Q3 2025 from $48.0 million in Q3 2024, reflecting program wind-downs and workforce reductions.

  • General and administrative expenses were $11.5 million in Q3 2025, down from $15.8 million in Q3 2024, mainly due to reduced personnel and absence of prior year impairment charges.

  • Cash, cash equivalents, and investments totaled $291.1 million as of September 30, 2025, including $14.7 million from ATM equity raised in September and $5.3 million in October.

Outlook and guidance

  • Cash runway expected through 2027 based on current operating plan and recent workforce reductions.

  • Revenue for the next several years will primarily derive from the GSK collaboration, with deferred revenue of $179.0 million as of September 30, 2025.

  • 2025 guidance: collaboration revenue between $13–18 million, R&D expenses $130–140 million, G&A expenses $55–65 million.

  • IND submissions for AL137 and AL050 targeted for 2026 and 2027, respectively.

  • Interim analysis for PROGRESS-AD Phase 2 trial planned for 1H 2026.

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Frequently asked questions

Alector, Inc., a clinical stage biopharmaceutical company, develops therapies for the treatment of neurodegeneration diseases. The company is developing AL001, an antibody that targets delta-like ligand 4-Notch to address abnormal signaling triggered by microglia in Alzheimer's disease prevention and slowing in patients with mild cognitive impairment and early-stage Alzheimer's disease; AL101, an anti-TREM2 antibody targeting microglia function that is in Phase IIa clinical trial for the treatment of frontotemporal dementia; AL003, an anti-LINGO monoclonal antibody targeting oligodendrocyte precursor cells for myelination; and AL002 and AL004 for preventing or slowing disease progression in Parkinson's disease. The company was founded in 2013 and is headquartered in South San Francisco, California.

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