The William and Flora Hewlett Foundation is a private philanthropic institution established in 1966. Headquartered in Menlo Park, California, the foundation holds over $13 billion in assets and awards more than $600 million in grants annually. Its grantmaking focuses on key areas such as climate change mitigation, reproductive health, education, democracy and governance, and performing arts. The foundation emphasizes long-term partnerships, evidence-based strategies, and trust-based philanthropy. It supports work both in the United States and internationally, aiming to advance equity, protect human rights, and strengthen institutions critical to social and environmental progress.
Asset class
Impact theme
Investment geographies
