Umibecestat, also known as CNP-520, is a beta-secretase inhibitor and is a drug candidate for prevention trials in Alzheimer’s disease. CNP520 has a selectivity, pharmacodynamics, and distribution profile suitable for AD prevention studies. CNP520 reduced brain and cerebrospinal fluid (CSF) Aβ in rats and dogs, and Aβ plaque deposition in APP-transgenic mice. CNP520 reduces Aβ load and neuroinflammation in APP‐transgenic mice