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Private foundations Petaluma, CAtax years 2024 to 2025

Private foundations in Petaluma, CA

27 private foundations based in Petaluma, CA filed a 990-PF in the last two years. In their latest returns they gave $12.3 million in 395 grants, and 7 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. CS FundPetaluma, CA · tax year 2024 129 grants Preselected only $6,540,120 giving
  2. Warsh-Mott LegacyPetaluma, CA · tax year 2024 51 grants Preselected only $3,372,000 giving
  3. Arntz Family FoundationPetaluma, CA · tax year 2024 Grants listed in an attachment (not in the e-file) Preselected only $842,566 giving
  4. Headlands FoundationPetaluma, CA · tax year 2024 6 grants Preselected only $361,000 giving
  5. The Nicholson Family FoundationPetaluma, CA · tax year 2025 49 grants Accepts applications $313,000 giving
  6. Alvin James Hansen FoundationPetaluma, CA · tax year 2024 5 grants Preselected only $175,100 giving
  7. The Jay Chiat Foundation IncPetaluma, CA · tax year 2025 3 grants Preselected only $114,500 giving
  8. Lorne and Ilona Parker FoundationPetaluma, CA · tax year 2024 33 grants Preselected only $112,250 giving
  9. Weinreb Pilecki Segal FoundationPetaluma, CA · tax year 2025 69 grants Accepts applications $93,425 giving
  10. Peaceful World FoundationPetaluma, CA · tax year 2024 10 grants Accepts applications $92,000 giving
  11. Bellwether Farms FoundationPetaluma, CA · tax year 2024 2 grants Preselected only $75,000 giving
  12. The Minnie & August Cooke TrustPetaluma, CA · tax year 2025 13 grants Preselected only $70,500 giving
  13. Peter T Paul Foundation IncPetaluma, CA · tax year 2024 1 grant Accepts applications $50,000 giving
  14. Rotary Club of Petaluma FoundationPetaluma, CA · tax year 2024 1 grant Accepts applications $37,109 giving
  15. Sikora Family FoundationPetaluma, CA · tax year 2025 5 grants Preselected only $32,614 giving
  16. Harrison Mecham Relief Fund of PetalumaPetaluma, CA · tax year 2024 2 grants Accepts applications $29,000 giving
  17. Imagination Foundation For the Arts Education & the EnvironmentPetaluma, CA · tax year 2024 14 grants Preselected only $9,825 giving
  18. Kiwanis of Petaluma Foundation IncPetaluma, CA · tax year 2024 2 grants Preselected only $4,515 giving

Foundations that accept applications

Largest first

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

  1. The Nicholson Family FoundationPetaluma, CA · tax year 2025 49 grants Accepts applications $313,000 giving
  2. Weinreb Pilecki Segal FoundationPetaluma, CA · tax year 2025 69 grants Accepts applications $93,425 giving
  3. Peaceful World FoundationPetaluma, CA · tax year 2024 10 grants Accepts applications $92,000 giving
  4. Peter T Paul Foundation IncPetaluma, CA · tax year 2024 1 grant Accepts applications $50,000 giving
  5. Rotary Club of Petaluma FoundationPetaluma, CA · tax year 2024 1 grant Accepts applications $37,109 giving
  6. Harrison Mecham Relief Fund of PetalumaPetaluma, CA · tax year 2024 2 grants Accepts applications $29,000 giving
  7. Kelso Institute for the Study of Economic SystemsPetaluma, CA · tax year 2024 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. Philanthropy and grantmaking3 foundations $3,273,07036% of the total
  2. Environment5 foundations $848,0009% of the total
  3. Food and agriculture6 foundations $847,2009% of the total
  4. Civil rights4 foundations $770,5009% of the total
  5. International aid5 foundations $700,2758% of the total
  6. Education7 foundations $685,1488% of the total
  7. 14 other causes $1,936,71521% of the total

Most active small givers

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

  1. Weinreb Pilecki Segal FoundationPetaluma, CA · tax year 2025 69 grants Accepts applications $93,425 giving
  2. Sikora Family FoundationPetaluma, CA · tax year 2025 5 grants Preselected only $32,614 giving
  3. Bellwether Farms FoundationPetaluma, CA · tax year 2024 2 grants Preselected only $75,000 giving
  4. Harrison Mecham Relief Fund of PetalumaPetaluma, CA · tax year 2024 2 grants Accepts applications $29,000 giving
  5. Kiwanis of Petaluma Foundation IncPetaluma, CA · tax year 2024 2 grants Preselected only $4,515 giving
  6. Peter T Paul Foundation IncPetaluma, CA · tax year 2024 1 grant Accepts applications $50,000 giving
  7. Rotary Club of Petaluma FoundationPetaluma, CA · tax year 2024 1 grant Accepts applications $37,109 giving