Six Tree Foundation
Invitation OnlyAtherton, California · EIN 87-2933644 · Private foundation
Grants paid (2025)$1.1M
Organizations funded16
Typical grant$25,000
Total assets$1.9M
Half of its grants to organizations were between $25,000 and $50,000.
From the return
How to apply
On its return for tax year 2025 the foundation checked the box saying it only makes contributions to preselected charitable organizations and does not accept unsolicited requests for funds.
What it funds
Share of grant lines on the latest return, classified from the purpose each grant states.
Where it gives
62% of grants went outside California.
Grants paid in tax year 2025
| Recipient | Location | Purpose | Amount |
|---|---|---|---|
| Arizona State University Fdn | Tempe, AZ | Unrestricted gift | $400,000 |
| Mid-Pacific Institute | Honolulu, HI | Unrestricted gift | $150,000 |
| California Community Fund | Los Angeles, CA | Unrestricted gift | $100,000 |
| Gladstone Foundation | San Francisco, CA | Unrestricted gift | $87,500 |
| US Japan Council | Washington, DC | Unrestricted gift | $50,000 |
| Stanford University | Stanford, CA | Unrestricted gift | $50,000 |
| Foundation for International Understanding Through Students | Seattle, WA | Unrestricted gift | $35,000 |
| Purple Maia Foundation | Aiea, HI | Unrestricted gift | $25,000 |
| Nishimachi Foundation the Corp Trust Co | Wilmington, DE | Unrestricted gift | $25,000 |
| Risehi Foundation | Kailua, HI | Unrestricted gift | $25,000 |
| Okinawa Institute of Science and Technology Foundation | Irvington, NY | Unrestricted gift | $25,000 |
| University of California Santa Barbara | Santa Barbara, CA | Unrestricted gift | $25,000 |
| Pacific International Center for High Technology Research (Pichtr) | Honolulu, HI | Unrestricted gift | $25,000 |
| Japanese Friendship Gardens of Phoenix | Phoenix, AZ | Unrestricted gift | $20,000 |
| Menlo College | Atherton, CA | Unrestricted gift | $15,000 |
| Kristi Yamaguchis Always Dream | Danville, CA | Unrestricted gift | $9,000 |
Giving by year
| Tax year | Grants paid | Grant lines |
|---|---|---|
| 2025 | $1,066,500 | 16 |
| 2024 | $707,500 | 14 |
| 2023 | $730,000 | 11 |
Sources
- IRS Form 990-PF, tax year 2025, filed May 5, 2026 - IRS e-file batch, object ID 202621259349103077
- IRS Tax Exempt Organization Search for EIN 87-2933644
- Profile updated Nov 5, 2026
Facts on this page come from the foundation's own IRS Form 990-PF filings as published by the IRS. Grantvello does not know whether a foundation is accepting proposals right now: a past grant is not an open opportunity. Always confirm current guidelines with the funder before applying.