The goal of this Notice of Funding Opportunity (NOFO) is to provide funding support for the pre-clinical and early stage clinical (Phase I) development of novel small-molecule and biologic drug candidates that prevent Alzheimer;apos;s disease (AD), slow its progression, or treat its cognitive and behavioral symptoms. Participants in this program will receive funding for therapy development activities such as medicinal chemistry; pharmacokinetics (PK); Absorption, Distribution, Metabolism, Excretion, Toxicology (ADMET); efficacy in animal models; development of biomarkers for target engagement; formulation development; chemical synthesis under Good Manufacturing Practices (GMP); Investigational New Drug (IND) enabling studies; and initial Phase I clinical testing. Applications not responsive to this NOFO include research on basic mechanisms of disease or mechanisms of drug action; development ofrisk, diagnostic, prognostic, predictive, and preventionbiomarkers, devices, non-pharmacological interventions (e.g., exercise, diet, cognitive training), repurposed drugs and combination therapies; discovery activities such as high-throughput screening and hit optimization; and stand-alone clinical trials.