Thornton Foundation is a private foundation focused on Philanthropy, Voluntarism & Grantmaking, based in SAN MARINO, CA. IRS filing data is available for 2020. In 2020, it awarded 1 grants totaling $3.1M. Net investment income was $6.7M.
Financial Overview
From 2020 IRS Form 990-PF · View filing
Total Assets
—
Annual Giving
$3.1M
Grant Count
1
Avg Grant Size
$3.1M
Under IRS private-foundation payout rules, Thornton Foundation reported a distributable amount of $2.6M for 2020 — the minimum it must pay out in qualifying distributions.
About Thornton Foundation
Based on IRS filings
Thornton Foundation is a private foundation focused on Philanthropy, Voluntarism & Grantmaking, based in SAN MARINO, CA. IRS filing data is available for 2020. In 2020, it awarded 1 grants totaling $3.1M. Net investment income was $6.7M.
Focus Areas
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Geographic Focus
Where this funder awards grants
Grant Distribution by State
States
Cities
Financial History
Multi-year comparison from IRS filings
| Metric | 2020 |
|---|---|
| Total Assets | — |
| Revenue | $6,719,225 |
| Expenses | $3,106,289 |
| Qualifying Distributions | — |
| Net Investment Income | $6,705,022 |
| Distributable Amount | $2,619,489 |
Giving Over Time
Total grant dollars and number of grants per year
Grant Insights
How this funder distributes its grants
Top Recipients
Top 1 recipients in 2020
Grant Size Distribution
1 grants across all recorded years
Giving History
Grant recipients and amounts by year
Among its reported 2020 grants, the largest include See Attachment ($3,065,500).
| Recipient | Purpose | Amount |
|---|---|---|
| SEE ATTACHMENT SAN MARINO, CA | PUBLIC CHARITIES | $3,065,500 |
Leadership & Key People
Officers and directors from IRS filings
Compensation Overview
From 2020 IRS filing
From 2020 filing
| Name | Title | Hours | Compensation |
|---|---|---|---|
| CHARLES B THORNTON | PRESIDENT | — | — |
| GENEVA H THORNTON | SECRETARY | — | — |
| ROBERT L ZUBER | CFO | — | — |
| BETTE P COOK | SECRETARY | — | — |
Subject Areas
Focus areas based on grantmaking activity
Frequently Asked Questions
What is Thornton Foundation?
Thornton Foundation is a nonprofit organization focused on Philanthropy, Voluntarism & Grantmaking, based in SAN MARINO, CA. It holds — in total assets as of 2020.
Where does Thornton Foundation operate?
Thornton Foundation has awarded grants in California.
What size grants does Thornton Foundation award?
In 2020, Thornton Foundation awarded 1 grants totaling $3.1M — an average of about $3.1M per grant, based on its IRS Form 990 filings.
How much is Thornton Foundation required to give away each year?
Private foundations must generally distribute about 5% of their assets annually. For 2020, Thornton Foundation reported a distributable amount of $2.6M on its IRS Form 990-PF — the minimum it must pay out in qualifying distributions.
What is Thornton Foundation's EIN?
Thornton Foundation's EIN (Employer Identification Number) is 20-1660366. IRS Form 990 filing data is available on this page for 2020.
Explore Open Grants
Browse active grant opportunities in Thornton Foundation's focus areas in our free grants database
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Data last updated April 2026. Sourced from IRS Form 990-PF filings.
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