GrantAuthority

Unknown foundations

607 grantmaking foundations focused on unknown, ranked by recent giving reported to the IRS (about $420M combined).

Top foundations by giving

  1. Koret Foundation
    San Francisco, CA
    $59M (2025)
  2. Sid W Richardson Foundation
    Fort Worth, TX
    $24M (2024)
  3. Starbucks Foundation
    Seattle, WA
    $21M (2025)
  4. Avi Chai Foundation
    New York, NY
    $16M (2024)
  5. Lincoln Financial Foundation Inc
    Fort Wayne, IN
    $11M (2025)
  6. The Pierre and Tana Matisse Foundation
    New York, NY
    $10M (2024)
  7. Yum Brands Foundation Inc
    Louisville, KY
    $10M (2025)
  8. Donna and Marvin Schwartz Foundation
    New York, NY
    $9.4M (2025)
  9. The Riley Foundation
    Meridian, MS
    $9M (2025)
  10. Joseph and Terri Gugenheim Charitable Foundation
    Houston, TX
    $8.1M (2025)
  11. Lee H and Marion B Thompson Foundation
    Wilsonville, OR
    $8M (2024)
  12. Kleinheinz Family Foundation for the Arts and Education
    Fort Worth, TX
    $7.7M (2024)
  13. Deus Spes Mea Foundation Inc
    Miami, FL
    $7.5M (2025)
  14. Kolatch Family Foundation
    Englewood, NJ
    $6.9M (2025)
  15. Hardesty Family Foundation Inc
    Tulsa, OK
    $6.8M (2025)
  16. Alkek & Williams Foundation
    Houston, TX
    $6.2M (2024)
  17. Vista Hermosa
    Pasco, WA
    $6.1M (2024)
  18. Chs Foundation
    Inver Grove Heights, MN
    $6M (2025)
  19. Lynch Blades Foundation Inc
    Albany, NY
    $5.9M (2025)
  20. Zion Natural History Association
    Springdale, UT
    $4.7M (2025)
  21. Rubin Family Foundation Inc
    Brooklyn, NY
    $4.4M (2024)
  22. Onion Foundation
    Wayne, ME
    $4.4M (2024)
  23. Stephen Della Pietra and Pamela Hurst-Della Pietra Family Foundat
    Jericho, NY
    $4.1M (2024)
  24. Vadon Foundation
    Seattle, WA
    $3.5M (2024)
  25. Land O L Foundation
    St Paul, MN
    $3.4M (2025)

Showing the top 100 by giving. Search all 607 with a free account.

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Unknown foundations by state