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Private foundations Castro Valley, CAtax years 2024 to 2025

Private foundations in Castro Valley, CA

14 private foundations based in Castro Valley, CA filed a 990-PF in the last two years. In their latest returns they gave $857,519 in 132 grants, and 2 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 James and Barbara Knuppe Family FoundationCastro Valley, CA · tax year 2024 13 grants Preselected only $424,590 giving
  2. Pamela and Richard Rigg FoundationCastro Valley, CA · tax year 2025 1 grant Preselected only $100,000 giving
  3. The MBK FoundationCastro Valley, CA · tax year 2025 21 grants Preselected only $100,000 giving
  4. Mei De And Nai Kang FoundationCastro Valley, CA · tax year 2024 4 grants Preselected only $82,070 giving
  5. LGLP MinistriesCastro Valley, CA · tax year 2025 16 grants Preselected only $62,230 giving
  6. Karol Uryga-Nawarowski FoundationCastro Valley, CA · tax year 2024 17 grants Accepts applications $53,100 giving
  7. Duchen FoundationCastro Valley, CA · tax year 2025 20 grants Preselected only $13,000 giving
  8. Bhan S Pannu Charitable FoundationCastro Valley, CA · tax year 2025 7 grants Preselected only $12,525 giving
  9. Eliodoro E Marasigan Foundation IncCastro Valley, CA · tax year 2025 27 grants Accepts applications $8,965 giving
  10. Thousand Mather FoundationCastro Valley, CA · tax year 2024 6 grants Preselected only $1,039 giving

Foundations that accept applications

Largest first

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

  1. Karol Uryga-Nawarowski FoundationCastro Valley, CA · tax year 2024 17 grants Accepts applications $53,100 giving
  2. Eliodoro E Marasigan Foundation IncCastro Valley, CA · tax year 2025 27 grants Accepts applications $8,965 giving

Giving by cause

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

  1. Mental health1 foundation $40,12235% of the total
  2. Human services5 foundations $18,90316% of the total
  3. Medical research1 foundation $18,00016% of the total
  4. Education4 foundations $10,0549% of the total
  5. International aid3 foundations $5,1034% of the total
  6. Environment1 foundation $4,4004% of the total
  7. 8 other causes $18,94616% of the total

Most active small givers

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

  1. Eliodoro E Marasigan Foundation IncCastro Valley, CA · tax year 2025 27 grants Accepts applications $8,965 giving
  2. Duchen FoundationCastro Valley, CA · tax year 2025 20 grants Preselected only $13,000 giving
  3. LGLP MinistriesCastro Valley, CA · tax year 2025 16 grants Preselected only $62,230 giving
  4. The James and Barbara Knuppe Family FoundationCastro Valley, CA · tax year 2024 13 grants Preselected only $424,590 giving
  5. Bhan S Pannu Charitable FoundationCastro Valley, CA · tax year 2025 7 grants Preselected only $12,525 giving
  6. Thousand Mather FoundationCastro Valley, CA · tax year 2024 6 grants Preselected only $1,039 giving
  7. Mei De And Nai Kang FoundationCastro Valley, CA · tax year 2024 4 grants Preselected only $82,070 giving