A Study of Trontinemab in Cognitively Unimpaired Individuals at Risk for Progression to Symptomatic Alzheimer's Disease

Inclusion Criteria: * Body weight of 150 kg or less * Willingness and ability to complete all aspects of the study for the duration of the study * Adequate visual and auditory acuity, in the investigator's judgment, sufficient to perform the neuropsychological testing (eyewear and hearing aids are permitted) * Cognitively and functionally unimpaired as defined by the protocol * Availability of a study partner as defined by the protocol * A plasma pTau217 level consistent with a high likelihood of future clinical progression Exclusion Criteria: * Any evidence of a condition other than AD that may affect cognition, including, but not limited to, frontotemporal dementia, dementia with Lewy bodies, vascular dementia, Parkinson disease, corticobasal syndrome, Creutzfeldt-Jakob disease, progressive supranuclear palsy, frontotemporal lobar degeneration (other than frontotemporal dementia), Huntington disease, normal pressure hydrocephalus, seizure disorder, delirium, or hypoxia * Mild cognitive impairment (MCI; may be referred to as prodromal AD), or any form of dementia * History or presence of clinically significant cerebrovascular disease * History of severe, clinically significant (persistent neurologic deficit or structural brain damage) central nervous system (CNS) trauma * History or presence of clinically significant intracranial mass * History of schizophrenia, schizoaffective disorder, major depression, or bipolar disorder * History or presence of any stroke with clinic…