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Form 990-PFTax year 2025EIN 87-2933644

Six Tree Foundation

A private foundation in Atherton, CA. Its return for tax year 2025 lists 16 grants and $1.1 million paid in grants.

See which foundations fund work like yours Matching by cause, place and grant size

Tax year 2025 (period ending Dec 31, 2025), read from the IRS e-file on Nov 11, 2026. Returns reach the IRS 5 to 18 months after the year they describe.

How to apply

Preselected only

The return checks the box saying the foundation gives only to preselected organizations and does not accept unsolicited requests.

Assets and giving by year

5 returns on file
Grants paid by tax year. The latest year is in blue.

  • Tax year 2025

    $1,066,500

    Grants listed
    16
    Assets, end of year
    $1,686,720

  • Tax year 2024

    $707,500

    Grants listed
    14
    Assets, end of year
    $2,089,246

  • Tax year 2023

    $730,000

    Grants listed
    11
    Assets, end of year
    $2,277,553

  • Tax year 2022

    $480,000

    Grants listed
    10
    Assets, end of year
    $2,229,517

  • Tax year 2021

    $225,000

    Grants listed
    2
    Assets, end of year
    $2,854,825

Grants paid in 2025

16 grants, largest first

As listed on the return.

  1. Arizona State University FDNTempe, AZ

    Unrestricted gift

    $400,000
  2. Mid-Pacific InstituteHonolulu, HI

    Unrestricted gift

    $150,000
  3. California Community FundLos Angeles, CA

    Unrestricted gift

    $100,000
  4. Gladstone FoundationSan Francisco, CA

    Unrestricted gift

    $87,500
  5. US Japan CouncilWashington, DC

    Unrestricted gift

    $50,000
  6. Stanford UniversityStanford, CA

    Unrestricted gift

    $50,000
  7. Foundation for International Understanding Through StudentsSeattle, WA

    Unrestricted gift

    $35,000
  8. Purple Maia FoundationHonolulu, HI

    Unrestricted gift

    $25,000
  9. Nishimachi Foundation the Corp Trust CoWilmington, DE

    Unrestricted gift

    $25,000
  10. Risehi FoundationKailua, HI

    Unrestricted gift

    $25,000
  11. Okinawa Institute of Science and Technology FoundationLong Island City, NY

    Unrestricted gift

    $25,000
  12. University of California Santa BarbaraSanta Barbara, CA

    Unrestricted gift

    $25,000
  13. Pacific International Center for High Technology Research (pichtr)Honolulu, HI

    Unrestricted gift

    $25,000
  14. Japanese Friendship Gardens of PhoenixPhoenix, AZ

    Unrestricted gift

    $20,000
  15. Menlo CollegeAtherton, CA

    Unrestricted gift

    $15,000
  16. Kristi Yamaguchis Always DreamDanville, CA

    Unrestricted gift

    $9,000

Where the money goes

By cause: grants to organizations we matched to the IRS list of exempt organizations, by their category.

  1. Education2 grants $137,50045% of the total
  2. International aid4 grants $135,00044% of the total
  3. Arts and culture1 grant $25,0008% of the total
  4. Philanthropy and grantmaking1 grant $9,0003% of the total

By State

Grants to organizations with a US address, latest year.

  1. Arizona2 grants $420,000
  2. California6 grants $286,500
  3. Hawaii4 grants $225,000
  4. District of Columbia1 grant $50,000
  5. Washington1 grant $35,000
  6. Delaware1 grant $25,000
  7. New York1 grant $25,000

Officers, directors and trustees

2 people as filed

As filed on the return, with average hours per week and pay from the foundation.

  • Andrew OgawaPRESIDENT Hours 2Pay $0
  • Arden Trust CompanyAGENT FOR TRUSTEE Hours 2Pay $0

The return

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