Thousand Mather Foundation
Thousand Mather Foundation is a private foundation, based in Castro Valley, CA. IRS filing data is available from 2021 through 2025. As of 2025, the organization holds $32K in total assets. In 2025, it awarded 6 grants totaling $1K.
Thousand Mather Foundation at a glance
In short: Thousand Mather Foundation gave $1K across 6 grants in 2025 (avg $173.167), mostly in California. Source: 2025 IRS Form 990-PF.
- Annual giving (2025)
- $1,039
- -51.7% vs 2024
- Grants made (2025)
- 6
- +50.0% vs 2024
- Average grant
- $173
- -67.8% vs 2024
- Median grant
- $102
- Total assets
- $31,607
- +85.8% vs 2024
- Primary geography
- California (90% 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 Thousand Mather Foundation funds
How this funder distributes its grants
Top Recipients
Top 6 recipients in 2025
The largest 2025 recipient was Castro Valley High School ($329). Together the top 6 received $1K.
Grant Size Distribution
12 grants across all recorded years
The most common grant size was under $50K: 12 grants of 12 (100%).
Geographic Focus
Where this funder awards grants
Grant Distribution by State
Share of 2025 grant dollars across all 6 itemized grants.
Cities
How Thousand Mather Foundation gives
- In 2025 it paid out 134% of its IRS minimum distribution (the 5% rule). Method
From the foundation's IRS Form 990-PF filings. Methodology.
Giving History
Giving Over Time
Total grant dollars and number of grants per year
From 2023 to 2025, annual grant giving ranged from $320 (2023) to $2K (2024). In 2025 it made 6 grants totaling $1K.
Grants by year
Grant recipients and amounts by year
| Recipient | Purpose | Amount |
|---|---|---|
| Castro Valley High School Castro Valley, CA | Contribution to badminton team Instrumental Music Band and Orchestra and PTSA Teacher Staff Appreciation Lunch. | $329 |
| Troop 722 Scouts BSA Castro Valley, CA | Support Youth Scouting activities | $307 |
| Rise Against Hunger Raleigh, NC | funds for the Rise Against Hunger program | $103 |
| UCLA Los Angeles, CA | UCLA Blue & Golad Challenge: Support Social Sciences Students | $100 |
| California Fire Foundation Sacramento, CA | Support critical services and aids to victims of fire or other natural disasters. | $100 |
| Chung Shan Family Association Oakland, CA | Scholarship Funds | $100 |
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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 | $31,607 | — | $1,259 | $1,039 | 6 | $1,259 | — | $940 |
| 2024 | $17,008 | $391 | $2,356 | $2,152 | 4 | $2,356 | $391 | $1,329 |
| 2023 | $28,404 | $746 | $534 | $320 | 2 | $534 | $746 | $1,196 |
| 2022 | $21,388 | $808 | $835 | — | — | $835 | $808 | $1,487 |
| 2021 | $33,850 | $33,850 | $5,000 | — | — | — | $749 | $1,794 |
Under IRS private-foundation payout rules, Thousand Mather Foundation reported a distributable amount of $940 for 2025 — the minimum it must pay out in qualifying distributions.
Leadership & Key People
Officers and directors from IRS filings
Thousand Mather Foundation is led by Karina Leung, CEO since 2022 (on filings since 2021); none of the 2 officers listed in 2025 report compensation.
Officers on the 2025 filing
Karina Leung
CEO
CEO & CFO → CEO, 2022
On filings since 2021
2 hrs/week
No compensation reported
William Wong
CFO
On filings since 2022
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 Thousand Mather Foundation
How much does Thousand Mather Foundation give each year?
Thousand Mather Foundation gave $1K across 6 grants in 2025, according to its 2025 IRS Form 990-PF. In 2024 it gave $2K across 4 grants.
What is Thousand Mather Foundation's typical grant size?
Thousand Mather Foundation's median grant in 2025 was $102, and its average grant was $173, across 6 grants on its 2025 IRS Form 990-PF.
Where does Thousand Mather Foundation give grants?
Thousand Mather Foundation gives mostly in California: 90% of the grant dollars itemized on its 2025 IRS Form 990-PF went to recipients there. The next largest state was North Carolina (10%). The most frequent recipient cities were Castro Valley, CA (2 grants).
Does Thousand Mather Foundation give general operating support?
Not in 2025: none of the 6 grants with a stated purpose on Thousand Mather Foundation's 2025 IRS Form 990-PF were described as general or operating support.
Who are Thousand Mather Foundation's largest grantees?
Thousand Mather Foundation's largest 2025 grantees include Castro Valley High School ($329), Troop 722 Scouts BSA ($307) and Rise Against Hunger ($103), according to its 2025 IRS Form 990-PF. Together they received 71% of its itemized 2025 grant dollars.
How large is Thousand Mather Foundation?
Thousand Mather Foundation reported $32K in total assets on its 2025 IRS Form 990-PF. It paid out $1K in qualifying distributions that year, against a required minimum of $940 (roughly 5% of its investment assets).
What is Thousand Mather Foundation's EIN?
Thousand Mather Foundation's EIN (Employer Identification Number) is 85-4175314. IRS Form 990 filing data is available on this page for 2021–2025.
Data last updated September 2026. Sourced from IRS Form 990-PF filings.
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 February 9, 2022)
- Updated Form 990-PF for fiscal year 2022 (received by the IRS February 27, 2023)
- Updated Form 990-PF for fiscal year 2023 (received by the IRS March 15, 2024)
- Updated Form 990-PF for fiscal year 2024 (received by the IRS March 13, 2025)
- Updated Form 990-PF for fiscal year 2025 (received by the IRS March 12, 2026)
- IRS filings on file for fiscal years 2021–2025
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