The Global Alzheimer's Initiative Now Act establishes a policy for the United States to lead global cooperative efforts in combating Alzheimer's disease and dementia, particularly in low- and middle-income countries where the prevalence is growing most rapidly. This policy includes leading multilateral health initiatives like the Davos Alzheimer's Collaborative (DAC) to develop diagnostics and treatments for diverse populations, promote international development cooperation, and leverage United States investments through burden sharing. The bill specifically authorizes the United States to participate in and contribute to the Davos Alzheimer's Collaborative, a public-private-patient venture focused on transforming Alzheimer's research, prevention, and care globally. The President is authorized to designate a qualified US representative to serve on DAC's Advisory Council and potentially its Board of Directors, coordinating with relevant federal agencies. Financial contributions from the United States are authorized from existing foreign assistance funds, but are subject to a matching requirement , ensuring that US Government contributions do not exceed 33 percent of DAC's total funding from all sources. Furthermore, the legislation requires the President to submit an annual report to appropriate congressional committees. This report must detail planned US financial contributions, the extent of US participation in DAC's governance, a summary of all private and governmental contributions to DAC, and how US involvement supports relevant government strategies and programs to combat Alzheimer's disease and promote global health.