Largest Foundations in America by Assets and Grants
The Bill & Melinda Gates Foundation remains the largest foundation in the United States by assets, with reported total assets above 60 billion dollars and annual grants exceeding 5 billion dollars in recent years, focusing on global health, education, and poverty alleviation Forbes. The Ford Foundation, one of the oldest private foundations, manages over 16 billion dollars in assets and directs funding toward social justice, human rights, and democratic institutions worldwide.
The Charles Koch Foundation and the Koch Network fund a wide range of policy, research, and nonprofit initiatives, with combined giving in the hundreds of millions of dollars annually across areas such as criminal justice reform, education, and free societies. The Robert Wood Johnson Foundation, the largest philanthropy in the United States devoted exclusively to health, manages assets above 14 billion dollars and funds programs aimed at improving health equity and access to care.
Major Foundation Sectors and Grant Focus Areas
Foundations in America span sectors including education, health, environment, arts, and public policy, with many of the largest organizations publishing detailed annual reports and Form 990 filings with the Internal Revenue Service IRS. The Lilly Endowment concentrates on religion, education, and community development in Indiana and beyond, while the Walton Family Foundation invests heavily in charter schools, education reform, and environmental conservation.
The Open Society Foundations, founded by George Soros, operate globally and fund initiatives related to justice, democratic governance, and public health, with annual spending in the billions Open Society Foundations. The Mellon Foundation focuses on arts and humanities, higher education, and conservation, while the Kresge Foundation supports arts, education, health, and human services through both programmatic grants and impact investments.
How to Research and Compare American Foundations
Researchers and donors use databases such as the Foundation Center, now part of Candid, and the Internal Revenue Service Tax Exempt Organization Search to access Form 990 data, grant histories, and financials for thousands of foundations ProPublica Nonprofit Explorer. These tools allow users to filter by location, total assets, annual giving, and NTEE codes to identify foundations aligned with specific causes or regions.
Rankings from organizations such as the National Philanthropic Trust and Candid highlight the fastest-growing and largest grantmakers, with community foundations and private foundations collectively distributing tens of billions of dollars each year across the United States Candid. Understanding the difference between private foundations, community foundations, and operating foundations helps donors and researchers quickly identify which organizations match their funding or research needs.