Thesauri Foundation
Thesauri Foundation is a private foundation, based in Los Altos Hills, CA. IRS filing data is available from 2020 through 2025. As of 2025, the organization holds $64K in total assets. In 2025, it awarded 2 grants totaling $4K.
Thesauri Foundation at a glance
In short: Thesauri Foundation gave $4K across 2 grants in 2025 (avg $2K), mostly in California. Source: 2025 IRS Form 990-PF.
- Annual giving (2025)
- $3,500
- -9.1% vs 2024
- Grants made (2025)
- 2
- +100.0% vs 2024
- Average grant
- $1,750
- -54.5% vs 2024
- Median grant
- $1,750
- Total assets
- $64,487
- -5.1% vs 2024
- Primary geography
- California (100% of itemized 2025 grant dollars)
- Latest 990 filing
- Form 990-PF, 2025 View filing
Data from IRS Form 990-PF, 2025; updated September 2026.
Who Thesauri Foundation funds
How this funder distributes its grants
Grant Size Distribution
6 grants across all recorded years
The most common grant size was under $50K: 6 grants of 6 (100%).
Geographic Focus
Where this funder awards grants
Grant Distribution by State
Share of 2025 grant dollars across all 2 itemized grants.
States
Cities
Giving History
Giving Over Time
Total grant dollars and number of grants per year
From 2020 to 2025, annual grant giving ranged from $4K (2025) to $6K (2023). In 2025 it made 2 grants totaling $4K.
Grants by year
Grant recipients and amounts by year
| Recipient | Purpose | Amount |
|---|---|---|
| 2 grants to individuals Recipients not named | — | $3,500 |
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Financial History
Multi-year comparison from IRS filings
| Filing year | Total Assets | Expenses | Grants paid | Grants | Qualifying Distributions |
|---|---|---|---|---|---|
| 2025 | $64,487 | $3,500 | $3,500 | 2 | $3,500 |
| 2024 | $67,987 | $3,850 | $3,850 | 1 | $3,850 |
| 2023 | $71,837 | $6,000 | $6,000 | 2 | $6,000 |
| 2022 | $77,837 | — | — | — | — |
| 2020 | $80,837 | $5,000 | $5,000 | 1 | — |
Leadership & Key People
Officers and directors from IRS filings
Thesauri Foundation is led by Jackson Lee, President & CEO on every filing since 2020; none of the 2 officers listed in 2025 report compensation.
Officers on the 2025 filing
Jackson Lee
President & CEO
On filings since 2020
3 hrs/week
No compensation reported
Maggie Tan
Secretary
On filings since 2020
3 hrs/week
No compensation reported
Data from IRS Form 990 filings, 2020–2025. "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 Thesauri Foundation
How much does Thesauri Foundation give each year?
Thesauri Foundation gave $4K across 2 grants in 2025, according to its 2025 IRS Form 990-PF. In 2024 it gave $4K across 1 grant.
How large is Thesauri Foundation?
Thesauri Foundation reported $64K in total assets on its 2025 IRS Form 990-PF.
Where does Thesauri Foundation operate?
Thesauri Foundation has awarded grants in California.
What is Thesauri Foundation's EIN?
Thesauri Foundation's EIN (Employer Identification Number) is 82-2163004. IRS Form 990 filing data is available on this page for 2020–2025.
Data last updated September 2026. Sourced from IRS Form 990-PF filings.
Data update history
(5)
When this profile's IRS filing data changed on Grantable
- Updated Form 990-PF for fiscal year 2020 (received by the IRS August 15, 2020)
- Updated Form 990-PF for fiscal year 2023 (received by the IRS July 1, 2024)
- Updated Form 990-PF for fiscal year 2024 (received by the IRS July 10, 2024)
- Updated Form 990-PF for fiscal year 2025 (received by the IRS October 23, 2025)
- IRS filings on file for fiscal years 2020–2025
Explore Open Grants
Browse active grant opportunities in Thesauri Foundation's focus areas in our free grants database
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