Largest private foundations in California
| # | Foundation | City | Focus area | Total assets |
|---|---|---|---|---|
| 1 | William & Flora Hewlett Foundation | Menlo Park | Philanthropy, Voluntarism & Grantmaking Foundations | $14.2 billion |
| 2 | Gordon E And Betty I Moore Foundation | Palo Alto | Philanthropy, Voluntarism & Grantmaking Foundations | $11.5 billion |
| 3 | Good Ventures Foundation | Palo Alto | Philanthropy, Voluntarism & Grantmaking Foundations | $10.1 billion |
| 4 | Jen-Hsun & Lori Huang Foundation | Palo Alto | Philanthropy, Voluntarism & Grantmaking Foundations | $9.2 billion |
| 5 | David And Lucile Packard Foundation | Los Altos | Philanthropy, Voluntarism & Grantmaking Foundations | $8.5 billion |
| 6 | Chan Zuckerberg Initiative Foundation | Palo Alto | Philanthropy, Voluntarism & Grantmaking Foundations | $7.5 billion |
| 7 | Conrad N Hilton Foundation | Westlake Vlg | Philanthropy, Voluntarism & Grantmaking Foundations | $7.4 billion |
| 8 | The California Endowment | Los Angeles | Philanthropy, Voluntarism & Grantmaking Foundations | $4.5 billion |
| 9 | Carl Victor Page Memorial Foundation | Palo Alto | Philanthropy, Voluntarism & Grantmaking Foundations | $4.5 billion |
| 10 | Crankstart Foundation | San Jose | Philanthropy, Voluntarism & Grantmaking Foundations | $4.4 billion |
| 11 | Sergey Brin Family Foundation | San Francisco | Philanthropy, Voluntarism & Grantmaking Foundations | $4.3 billion |
| 12 | H&H Evergreen Foundation | Menlo Park | Philanthropy, Voluntarism & Grantmaking Foundations | $3.7 billion |
| 13 | James Irvine Foundation | San Francisco | Philanthropy, Voluntarism & Grantmaking Foundations | $3.4 billion |
| 14 | Koum Family Foundation | Palo Alto | Philanthropy, Voluntarism & Grantmaking Foundations | $3.3 billion |
| 15 | Waverley Street Foundation | Palo Alto | Philanthropy, Voluntarism & Grantmaking Foundations | $2.7 billion |
| 16 | Astera Institute | Berkeley | Science & Technology | $2.6 billion |
| 17 | Gerson Bakar Foundation | San Francisco | Not listed | $2.5 billion |
| 18 | The Schmidt Family Foundation | Palo Alto | Education | $2.0 billion |
| 19 | Broad Foundation | Los Angeles | Philanthropy, Voluntarism & Grantmaking Foundations | $1.9 billion |
| 20 | W M Keck Foundation | Los Angeles | Philanthropy, Voluntarism & Grantmaking Foundations | $1.7 billion |
| 21 | The Ahmanson Foundation | Beverly Hills | Philanthropy, Voluntarism & Grantmaking Foundations | $1.6 billion |
| 22 | The Eric And Wendy Schmidt Fund For Strategic Innovation | Palo Alto | Philanthropy, Voluntarism & Grantmaking Foundations | $1.6 billion |
| 23 | The Annenberg Foundation | Los Angeles | Education | $1.5 billion |
| 24 | Shimon Ben Joseph Foundation | San Francisco | Philanthropy, Voluntarism & Grantmaking Foundations | $1.5 billion |
| 25 | Skyline Foundation | Palo Alto | Religion-Related | $1.3 billion |
The full list includes all 12,086 California foundations with street address, ZIP, EIN, focus area, income and tax period, plus every other state.
California cities with the most private foundations
- Los Angeles: 1,149
- San Francisco: 575
- San Diego: 398
- San Jose: 361
- Irvine: 259
- Beverly Hills: 235
- Pasadena: 206
- Palo Alto: 203
- Newport Beach: 181
- Santa Barbara: 173
Most common focus areas in California
- Philanthropy, Voluntarism & Grantmaking Foundations: 6,186
- Education: 981
- Human Services: 561
- Arts, Culture & Humanities: 482
- Religion-Related: 297
- Recreation & Sports: 251
- Youth Development: 165
- Health Care: 151
Where does this data come from?
The IRS Exempt Organizations Business Master File, downloaded in October 2026 and filtered to private foundations. Assets are as reported on each foundation's latest return on file. Foundations with no focus area code are shown as Not listed.