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Private foundations Tiburon, CAtax years 2024 to 2025

Private foundations in Tiburon, CA

28 private foundations based in Tiburon, CA filed a 990-PF in the last two years. In their latest returns they gave $12.8 million in 433 grants, and 1 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 2024 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 JEM ProjectTiburon, CA · tax year 2024 64 grants Preselected only $3,022,819 giving
  2. Skywords Family Foundation IncTiburon, CA · tax year 2024 4 grants Preselected only $2,515,000 giving
  3. Sustainable Grant Making Partners FundTiburon, CA · tax year 2024 31 grants Preselected only $1,476,000 giving
  4. Barn Road FoundationTiburon, CA · tax year 2024 27 grants Preselected only $1,305,500 giving
  5. The Bernard J & Mary T Johnson Family FoundationTiburon, CA · tax year 2025 28 grants Preselected only $911,192 giving
  6. The Frances K & Charles D Field FoundationTiburon, CA · tax year 2025 15 grants Preselected only $635,000 giving
  7. Grey Family FoundationTiburon, CA · tax year 2025 30 grants Preselected only $553,650 giving
  8. The Evan and Tracy Segal Family FoundationTiburon, CA · tax year 2024 38 grants Preselected only $421,985 giving
  9. 5 Ryan FoundationTiburon, CA · tax year 2025 43 grants Preselected only $407,500 giving
  10. Carolyn and Peter Friedman FoundationTiburon, CA · tax year 2024 13 grants Preselected only $400,524 giving
  11. Hilltop FoundationTiburon, CA · tax year 2025 65 grants Preselected only $373,000 giving
  12. Jinnie K Simonsen and John V Carbone FoundationTiburon, CA · tax year 2025 13 grants Preselected only $247,820 giving
  13. Jon & Darla Fisher FoundationTiburon, CA · tax year 2024 3 grants Preselected only $230,000 giving
  14. Rothkopf Family Charitable FoundationTiburon, CA · tax year 2025 6 grants Preselected only $116,000 giving
  15. The George Schwab and Leona Lauder FoundationTiburon, CA · tax year 2025 18 grants Preselected only $67,020 giving
  16. Cadieux Martin FoundationTiburon, CA · tax year 2025 15 grants Preselected only $59,000 giving
  17. Phillips - Morrison Institute of CaTiburon, CA · tax year 2024 1 grant Preselected only $25,000 giving
  18. Walter Iberti Charitable FoundationTiburon, CA · tax year 2025 9 grants Preselected only $14,704 giving
  19. Fontana FoundationTiburon, CA · tax year 2025 3 grants Preselected only $12,288 giving
  20. Allan H Rappaport Charitable FoundTiburon, CA · tax year 2024 6 grants Accepts applications $4,439 giving
  21. Chadwick Library Press FoundationTiburon, CA · tax year 2024 1 grant Preselected only $500 giving

Foundations that accept applications

Largest first

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

  1. Allan H Rappaport Charitable FoundTiburon, CA · tax year 2024 6 grants Accepts applications $4,439 giving

Giving by cause

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

  1. Education13 foundations $839,35216% of the total
  2. Philanthropy and grantmaking8 foundations $765,86914% of the total
  3. Civil rights5 foundations $722,00014% of the total
  4. Human services12 foundations $614,25012% of the total
  5. Arts and culture9 foundations $481,0609% of the total
  6. Animals8 foundations $380,7667% of the total
  7. 14 other causes $1,515,51228% of the total

Most active small givers

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

  1. The Evan and Tracy Segal Family FoundationTiburon, CA · tax year 2024 38 grants Preselected only $421,985 giving
  2. The George Schwab and Leona Lauder FoundationTiburon, CA · tax year 2025 18 grants Preselected only $67,020 giving
  3. Cadieux Martin FoundationTiburon, CA · tax year 2025 15 grants Preselected only $59,000 giving
  4. Walter Iberti Charitable FoundationTiburon, CA · tax year 2025 9 grants Preselected only $14,704 giving
  5. Rothkopf Family Charitable FoundationTiburon, CA · tax year 2025 6 grants Preselected only $116,000 giving
  6. Allan H Rappaport Charitable FoundTiburon, CA · tax year 2024 6 grants Accepts applications $4,439 giving
  7. Jon & Darla Fisher FoundationTiburon, CA · tax year 2024 3 grants Preselected only $230,000 giving
  8. Fontana FoundationTiburon, CA · tax year 2025 3 grants Preselected only $12,288 giving
  9. Phillips - Morrison Institute of CaTiburon, CA · tax year 2024 1 grant Preselected only $25,000 giving
  10. Chadwick Library Press FoundationTiburon, CA · tax year 2024 1 grant Preselected only $500 giving