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Private foundations San Mateo, CAtax years 2023 to 2025

Private foundations in San Mateo, CA

61 private foundations based in San Mateo, CA filed a 990-PF in the last two years. In their latest returns they gave $132.5 million in 706 grants, and 11 say they accept applications.

See which foundations fund work like yours Matching by cause, place and grant size

Foundations with a return in the last two years, each by its latest return (tax years 2023 to 2025), read from the IRS e-file on Nov 11, 2026. Returns reach the IRS 5 to 18 months after the year they describe.

Largest givers

By grants paid, latest return
  1. The Roberts FoundationSan Mateo, CA · tax year 2024 Grants listed in an attachment (not in the e-file) Preselected only $49,796,447 giving
  2. The Helen Diller FoundationSan Mateo, CA · tax year 2024 7 grants Preselected only $44,769,050 giving
  3. The Baszucki Family FoundationSan Mateo, CA · tax year 2024 29 grants Preselected only $11,346,570 giving
  4. With FoundationSan Mateo, CA · tax year 2024 53 grants Accepts applications $8,269,000 giving
  5. The Draper FoundationSan Mateo, CA · tax year 2024 114 grants Accepts applications $6,789,726 giving
  6. Franklin Templeton Charitable Foundation IncSan Mateo, CA · tax year 2024 43 grants Accepts applications $1,619,111 giving
  7. Rupert H Johnson Jr FoundationSan Mateo, CA · tax year 2025 20 grants Accepts applications $1,590,000 giving
  8. Blume FoundationSan Mateo, CA · tax year 2023 16 grants Preselected only $1,077,000 giving
  9. The Middleton FoundationSan Mateo, CA · tax year 2024 28 grants Preselected only $783,500 giving
  10. The O'Brien Family FoundationSan Mateo, CA · tax year 2025 56 grants Preselected only $779,550 giving
  11. The Eric and Lulu Roberts Family FoundationSan Mateo, CA · tax year 2025 12 grants Preselected only $736,503 giving
  12. The Courtney Roberts and Steve Preston Family FoundationSan Mateo, CA · tax year 2025 14 grants Preselected only $733,500 giving
  13. Greene Van Arsdale FoundationSan Mateo, CA · tax year 2025 8 grants Preselected only $494,161 giving
  14. Minority Television Project IncSan Mateo, CA · tax year 2024 17 grants Preselected only $377,824 giving
  15. The Shao-Li Charitable TrustSan Mateo, CA · tax year 2025 1 grant Preselected only $350,000 giving
  16. Erik S Cassel FoundationSan Mateo, CA · tax year 2024 6 grants Preselected only $340,000 giving
  17. The Mark and Kwala Roberts Family FoundationSan Mateo, CA · tax year 2025 5 grants Preselected only $250,789 giving
  18. The Elfenworks FoundationSan Mateo, CA · tax year 2025 13 grants Preselected only $250,150 giving
  19. Zief Family Foundation IncSan Mateo, CA · tax year 2024 1 grant Preselected only $230,000 giving
  20. The Robert I & Lien Q Chen Family FoundationSan Mateo, CA · tax year 2024 5 grants Preselected only $200,000 giving
  21. Truebeck FoundationSan Mateo, CA · tax year 2024 11 grants Preselected only $185,012 giving
  22. Xelay FoundationSan Mateo, CA · tax year 2025 14 grants Preselected only $176,489 giving
  23. JH Robbins FoundationSan Mateo, CA · tax year 2024 31 grants Accepts applications $155,500 giving
  24. Li & Liu Family FoundationSan Mateo, CA · tax year 2024 5 grants Accepts applications $149,669 giving
  25. Chance to ExcelSan Mateo, CA · tax year 2024 4 grants Preselected only $105,000 giving

Foundations that accept applications

Largest first

The return gives an application contact and does not check the preselected-only box.

  1. With FoundationSan Mateo, CA · tax year 2024 53 grants Accepts applications $8,269,000 giving
  2. The Draper FoundationSan Mateo, CA · tax year 2024 114 grants Accepts applications $6,789,726 giving
  3. Franklin Templeton Charitable Foundation IncSan Mateo, CA · tax year 2024 43 grants Accepts applications $1,619,111 giving
  4. Rupert H Johnson Jr FoundationSan Mateo, CA · tax year 2025 20 grants Accepts applications $1,590,000 giving
  5. JH Robbins FoundationSan Mateo, CA · tax year 2024 31 grants Accepts applications $155,500 giving
  6. Li & Liu Family FoundationSan Mateo, CA · tax year 2024 5 grants Accepts applications $149,669 giving
  7. China Times Cultural FoundationSan Mateo, CA · tax year 2025 22 grants Accepts applications $79,000 giving
  8. Clement Chen Family FoundationSan Mateo, CA · tax year 2025 4 grants Accepts applications $63,000 giving
  9. G W Williams FoundationSan Mateo, CA · tax year 2024 12 grants Accepts applications $51,000 giving
  10. Yun Family FoundationSan Mateo, CA · tax year 2025 1 grant Accepts applications $6,008 giving
  11. Palo Alto InstituteSan Mateo, CA · tax year 2025 1 grant Accepts applications $5,448 giving

Giving by cause

Grants to organizations we matched to the IRS list of exempt organizations, by their category.

  1. Education31 foundations $34,369,34554% of the total
  2. Philanthropy and grantmaking14 foundations $15,485,99424% of the total
  3. International aid9 foundations $5,413,1009% of the total
  4. Health12 foundations $2,306,7404% of the total
  5. Human services17 foundations $2,173,1263% of the total
  6. Arts and culture18 foundations $1,088,2912% of the total
  7. 15 other causes $2,725,0694% of the total

Most active small givers

Foundations with under $1 million in assets, by the number of grants they listed.

  1. The O'Brien Family FoundationSan Mateo, CA · tax year 2025 56 grants Preselected only $779,550 giving
  2. The Wolfe FoundationSan Mateo, CA · tax year 2025 21 grants Preselected only $28,500 giving
  3. The Eric and Lulu Roberts Family FoundationSan Mateo, CA · tax year 2025 12 grants Preselected only $736,503 giving
  4. G W Williams FoundationSan Mateo, CA · tax year 2024 12 grants Accepts applications $51,000 giving
  5. Truebeck FoundationSan Mateo, CA · tax year 2024 11 grants Preselected only $185,012 giving
  6. Goshen FoundationSan Mateo, CA · tax year 2024 10 grants Preselected only $23,500 giving
  7. Green Apple Foundation IncSan Mateo, CA · tax year 2025 9 grants Preselected only $20,235 giving
  8. The Helen Diller FoundationSan Mateo, CA · tax year 2024 7 grants Preselected only $44,769,050 giving
  9. The Lyda & Rico Deluca Foundation IncSan Mateo, CA · tax year 2024 7 grants Preselected only $85,000 giving
  10. The Marvin and Nancy Dennis Family FoundationSan Mateo, CA · tax year 2024 6 grants Preselected only $45,700 giving
  11. Porter Family FoundationSan Mateo, CA · tax year 2024 5 grants Preselected only $22,500 giving
  12. Chance to ExcelSan Mateo, CA · tax year 2024 4 grants Preselected only $105,000 giving
  13. Clement Chen Family FoundationSan Mateo, CA · tax year 2025 4 grants Accepts applications $63,000 giving
  14. The Forest Rose Leaf Family FoundationSan Mateo, CA · tax year 2025 4 grants Preselected only $15,000 giving
  15. The Marie Kendrick Otto FoundationSan Mateo, CA · tax year 2025 3 grants Preselected only $75,000 giving