The California State Capitol
Foundation Lookup

Private foundations Sonoma, CAtax years 2024 to 2025

Private foundations in Sonoma, CA

29 private foundations based in Sonoma, CA filed a 990-PF in the last two years. In their latest returns they gave $25.6 million in 306 grants, and 5 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. KHR McNeely Family FoundationSonoma, CA · tax year 2024 126 grants Preselected only $14,467,550 giving
  2. The Larry L Hillblom Foundation IncSonoma, CA · tax year 2024 47 grants Preselected only $6,852,302 giving
  3. Bigglesworth Family Foundation IncSonoma, CA · tax year 2025 4 grants Preselected only $1,758,000 giving
  4. The Vadasz Family FoundationSonoma, CA · tax year 2024 54 grants Preselected only $1,588,393 giving
  5. The Clark-Janis Family FoundationSonoma, CA · tax year 2024 10 grants Preselected only $487,600 giving
  6. Rose Marie Piper FoundationSonoma, CA · tax year 2025 6 grants Accepts applications $135,000 giving
  7. The Grieve Family Charitable Trust Dated May 26 2004Sonoma, CA · tax year 2024 8 grants Preselected only $73,140 giving
  8. Simon Blattner Family FoundationSonoma, CA · tax year 2025 21 grants Preselected only $59,500 giving
  9. John Christopher Bunting FoundationSonoma, CA · tax year 2025 9 grants Preselected only $42,500 giving
  10. End World HungerSonoma, CA · tax year 2025 4 grants Preselected only $36,700 giving
  11. August & Sylvia Sebastiani Foundation (fka August Sebastiani Charitable Trust)Sonoma, CA · tax year 2025 4 grants Preselected only $30,862 giving
  12. Zocchi Family FoundationSonoma, CA · tax year 2025 7 grants Preselected only $19,000 giving
  13. Sunray Center IncSonoma, CA · tax year 2025 1 grant Preselected only $14,148 giving
  14. Native American Bear FoundationSonoma, CA · tax year 2025 4 grants Accepts applications $7,000 giving
  15. Scribe FoundationSonoma, CA · tax year 2025 1 grant Accepts applications $4,520 giving

Foundations that accept applications

Largest first

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

  1. Rose Marie Piper FoundationSonoma, CA · tax year 2025 6 grants Accepts applications $135,000 giving
  2. Native American Bear FoundationSonoma, CA · tax year 2025 4 grants Accepts applications $7,000 giving
  3. Scribe FoundationSonoma, CA · tax year 2025 1 grant Accepts applications $4,520 giving
  4. Charlies AcresSonoma, CA · tax year 2025 0 grants Accepts applications $0 giving
  5. The John & Sandra Leland FoundationSonoma, CA · tax year 2025 0 grants Accepts applications $0 giving

Giving by cause

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

  1. Arts and culture7 foundations $3,331,35025% of the total
  2. Education7 foundations $2,977,52022% of the total
  3. Community development3 foundations $1,857,50014% of the total
  4. Philanthropy and grantmaking7 foundations $1,308,64810% of the total
  5. International aid3 foundations $948,5007% of the total
  6. Health7 foundations $850,1536% of the total
  7. 14 other causes $1,983,60015% of the total

Most active small givers

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

  1. Simon Blattner Family FoundationSonoma, CA · tax year 2025 21 grants Preselected only $59,500 giving
  2. John Christopher Bunting FoundationSonoma, CA · tax year 2025 9 grants Preselected only $42,500 giving
  3. The Grieve Family Charitable Trust Dated May 26 2004Sonoma, CA · tax year 2024 8 grants Preselected only $73,140 giving
  4. Zocchi Family FoundationSonoma, CA · tax year 2025 7 grants Preselected only $19,000 giving
  5. End World HungerSonoma, CA · tax year 2025 4 grants Preselected only $36,700 giving
  6. August & Sylvia Sebastiani Foundation (fka August Sebastiani Charitable Trust)Sonoma, CA · tax year 2025 4 grants Preselected only $30,862 giving
  7. Native American Bear FoundationSonoma, CA · tax year 2025 4 grants Accepts applications $7,000 giving
  8. Sunray Center IncSonoma, CA · tax year 2025 1 grant Preselected only $14,148 giving
  9. Scribe FoundationSonoma, CA · tax year 2025 1 grant Accepts applications $4,520 giving