Six Tree Foundation
Six Tree Foundation is a private foundation based in Atherton, California. Its 2025 filing reports 16 grants totaling $1,066,500, with listed recipients including educational institutions and organizations working in areas such as education, science, and U.S.–Japan relations.
Six Tree Foundation at a glance
In short: Six Tree Foundation gave $1.1M across 16 grants in 2025 (avg $67K), top state Arizona. Source: 2025 IRS Form 990-PF.
- Annual giving (2025)
- $1,066,500
- +50.7% vs 2024
- Grants made (2025)
- 16
- +14.3% vs 2024
- Average grant
- $66,656
- +31.9% vs 2024
- Median grant
- $25,000
- Total assets
- $1,686,720
- -19.3% vs 2024
- Primary geography
- Arizona (39% of itemized 2025 grant dollars)
- Latest 990 filing
- Form 990-PF, 2025 View filing
Data from IRS Form 990-PF, 2025; updated October 2026.
How to apply to Six Tree Foundation
- Accepts unsolicited proposals
- No
- How to Apply
-
The foundation does not accept unsolicited requests for funds and states that it makes contributions only to preselected charitable organizations.
- Contact
Mailing address: 57 Mulberry Lane, Atherton, CA 94027-5421
Phone: (614) 249-1948
Application details from Grantable's research on the foundation's public materials; confirm on its website before applying.
Who Six Tree Foundation funds
How this funder distributes its grants
Top Recipients
Top 10 recipients in 2025
The largest 2025 recipient was Arizona State University Fdn ($400K). Together the top 10 received $948K.
Grant Size Distribution
53 grants across all recorded years
The most common grant size was under $50K: 31 grants of 53 (58%).
Geographic Focus
Where this funder awards grants
In 2025, the reported shares of grant dollars by recipient state were Arizona 39%, California 27%, Hawaiʻi 21%, Washington, DC 5%, and Washington 3%.
Grant Distribution by State
Share of 2025 grant dollars across all 16 itemized grants.
Cities
How Six Tree Foundation gives
- 75% of 2025 grantees were also funded in 2024. Method
- Giving grew 122% from 2022 to 2025. Method
- In 2025 it paid out well above its IRS minimum distribution (the 5% rule). Method
Estimate from itemized grant lists in IRS Form 990-PF filings (2025). Recipient names are matched across years, so a renamed or misspelled grantee can look new; grants to individuals are left out. Methodology.
Giving History
Giving Over Time
Total grant dollars and number of grants per year
From 2021 to 2025, annual grant giving ranged from $225K (2021) to $1.1M (2025). In 2025 it made 16 grants totaling $1.1M.
Grants by year
Grant recipients and amounts by year
| Recipient | 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 Seattle, WA | Unrestricted Gift | $35,000 |
| Purple Maia Foundation Aiea, HI | Unrestricted Gift | $25,000 |
| Nishimachi Foundation Wilmington, DE | Unrestricted Gift | $25,000 |
| Risehi Foundation Kailua, HI | Unrestricted Gift | $25,000 |
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Financial History
Multi-year comparison from IRS filings
| Filing year | Total Assets | Revenue | Expenses | Grants paid | Grants | Qualifying Distributions | Net Investment Income | Distributable Amount |
|---|---|---|---|---|---|---|---|---|
| 2025 | $1,686,720 | $797,855 | $1,200,753 | $1,066,500 | 16 | $1,175,811 | $246,568 | $102,419 |
| 2024 | $2,089,246 | $915,165 | $766,008 | $707,500 | 14 | $728,632 | $448,340 | $111,276 |
| 2023 | $2,277,553 | $1,046,519 | $750,501 | $730,000 | 11 | $734,775 | $560,131 | $109,505 |
| 2022 | $2,229,517 | $-73,806 | $551,032 | $480,000 | 10 | $497,367 | $20,905 | $129,209 |
| 2021 | $2,854,825 | $3,080,036 | $225,211 | $225,000 | 2 | $225,000 | $3,079,825 | $28,403 |
Under IRS private-foundation payout rules, Six Tree Foundation reported a distributable amount of $102K for 2025 — the minimum it must pay out in qualifying distributions.
Research compiled by Grantable AI from public sources. Last updated September 2026.
Mission & Focus Areas
No mission statement for the foundation is provided. Its grants include organizations with varied missions. For example, Mid-Pacific Institute describes its mission as cultivating compassionate, world-ready learners rooted in its Christian heritage; RiseHI Foundation says it expands educational and career opportunities for youth in Hawaiʻi; and the U.S.-Japan Council describes its work as connecting leaders to strengthen the U.S.-Japan partnership. These are the grantees’ stated missions, not stated priorities of the foundation.
Grantmaking
In filing year 2025, the foundation reported 16 grants totaling $1,066,500. Grants ranged from $9,000 to $400,000, with a median grant of $25,000. The largest reported grants included:
The filing lists the purposes of these grants as unrestricted gifts. Other 2025 recipients included Foundation for International ($35,000), Purple Maia Foundation ($25,000), Nishimachi Foundation ($25,000), RiseHI Foundation ($25,000), Okinawa Institute of Science and ($25,000), and University of California Santa Barbara ($25,000). Pacific International Center for High also reported receiving $25,000 from the foundation in 2025.
Leadership & Key People
Leadership team and compensation from IRS filings
The 2025 filing lists Andrew Ogawa as president.
Six Tree Foundation is led by Andrew Ogawa, President on every filing since 2021 — the only officer listed, and uncompensated.
Officers on the 2025 filing
Andrew Ogawa
President
On filings since 2021
2 hrs/week
No compensation reported
Data from IRS Form 990 filings, 2021–2025. "On filings since" is the earliest filing we hold that lists the person; hours are average hours per week as reported.
Frequently asked questions about Six Tree Foundation
How much does Six Tree Foundation give each year?
Six Tree Foundation gave $1.1M across 16 grants in 2025, according to its 2025 IRS Form 990-PF. In 2024 it gave $708K across 14 grants.
What is Six Tree Foundation's typical grant size?
Six Tree Foundation's median grant in 2025 was $25,000, and its average grant was $66,656, across 16 grants on its 2025 IRS Form 990-PF.
Where does Six Tree Foundation give grants?
Six Tree Foundation's top state is Arizona, with 39% of the grant dollars itemized on its 2025 IRS Form 990-PF. The next largest states were California (27%) and Hawaii (21%). The most frequent recipient cities were Honolulu, HI (2 grants).
Does Six Tree Foundation give general operating support?
Yes: 100% of Six Tree Foundation's 2025 grants with a stated purpose (16 of 16) were for general or operating support, per its 2025 IRS Form 990-PF.
Who are Six Tree Foundation's largest grantees?
Six Tree Foundation's largest 2025 grantees include Arizona State University Fdn ($400,000), Mid-Pacific Institute ($150,000) and California Community Fund ($100,000), according to its 2025 IRS Form 990-PF. Together they received 61% of its itemized 2025 grant dollars.
How large is Six Tree Foundation?
Six Tree Foundation reported $1.7M in total assets on its 2025 IRS Form 990-PF. It paid out $1.2M in qualifying distributions that year, against a required minimum of $102K (roughly 5% of its investment assets).
What does Six Tree Foundation fund?
No mission statement for the foundation is provided. Its grants include organizations with varied missions. See mission & focus areas ↑
How do I apply for a grant from Six Tree Foundation?
The foundation does not accept unsolicited requests for funds and states that it makes contributions only to preselected charitable organizations. Eligibility and process details are in the grantmaking section of this profile. See how to apply ↑
What is Six Tree Foundation's EIN?
Six Tree Foundation's EIN (Employer Identification Number) is 87-2933644. IRS Form 990 filing data is available on this page for 2021–2025.
Does Six Tree Foundation accept unsolicited proposals?
No, according to Grantable's research on the foundation's published guidelines. See how to apply ↑
Data last updated October 2026. Sourced from IRS Form 990-PF filings. Research dossier generated September 2026.
Data update history
(6)
When this profile's IRS filing data changed on Grantable
- Updated Form 990-PF for fiscal year 2021 (received by the IRS November 14, 2022)
- Updated Form 990-PF for fiscal year 2022 (received by the IRS May 11, 2023)
- Updated Form 990-PF for fiscal year 2023 (received by the IRS November 8, 2024)
- Updated Form 990-PF for fiscal year 2024 (received by the IRS May 13, 2025)
- Added Form 990-PF for fiscal year 2025 (received by the IRS May 5, 2026)
- IRS filings on file for fiscal years 2021–2024
Explore Open Grants
Browse active grant opportunities in Six Tree Foundation's focus areas in our free grants database
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Cite this profile
Grantable. (2026). Six Tree Foundation funder profile. GrantGraph. Retrieved October 15, 2026, from https://grantable.co/funders/six-tree-foundation-morg_5c1d7136729d4241ac8f5e5088e1ea91
BibTeX
@misc{grantable_872933644_2026,
author = {{Grantable}},
title = {{Six Tree Foundation funder profile}},
howpublished = {GrantGraph},
year = {2026},
url = {https://grantable.co/funders/six-tree-foundation-morg_5c1d7136729d4241ac8f5e5088e1ea91},
note = {Accessed 2026-10-15. Data licensed CC BY 4.0}
}The figures on this page are open data under CC BY 4.0: reuse them with credit to Grantable and a link. Download the data.
Figures come from Six Tree Foundation's IRS filings (methodology). AI-written summaries, news items and logos are not covered by the open licence. Spot an error? Email hello@grantable.co.
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