Guestrin Family Foundation
Guestrin Family Foundation is a private foundation, based in Stanford, CA. IRS filing data is available from 2020 through 2025. As of 2025, the organization holds $4.3M in total assets. In 2025, it awarded 1 grant totaling $324K. Net investment income was $123K.
Guestrin Family Foundation at a glance
In short: Guestrin Family Foundation gave $324K across 1 grant in 2025 (avg $324K), mostly in New York. Source: 2025 IRS Form 990-PF.
- Annual giving (2025)
- $323,993
- +6.8% vs 2024
- Grants made (2025)
- 1
- +0.0% vs 2024
- Average grant
- $323,993
- +6.8% vs 2024
- Median grant
- $323,993
- Total assets
- $4,251,404
- +1.7% vs 2024
- Primary geography
- New York (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 Guestrin Family Foundation funds
How this funder distributes its grants
Top Recipients
Top recipient in 2025
The largest 2025 recipient was GS Donor Advised Philanthropy Fund ($324K).
Grant Size Distribution
5 grants across all recorded years
The most common grant size was in the $250–500K range: 3 grants of 5 (60%).
Geographic Focus
Where this funder awards grants
Grant Distribution by State
Share of the 2025 grant dollars on its one itemized grant.
States
Cities
How Guestrin Family Foundation gives
- Giving grew 198% from 2022 to 2025. Method
- In 2025 it paid out 93% of its IRS minimum distribution (the 5% rule). Foundations have until the end of the next year to meet it. 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 2020 to 2025, annual grant giving ranged from $109K (2022) to $324K (2025). In 2025 it made 1 grant totaling $324K.
Grants by year
Grant recipients and amounts by year
| Recipient | Purpose | Amount |
|---|---|---|
| GS Donor Advised Philanthropy Fund New York, NY | To Promote Philanthropy in the US | $323,993 |
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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 | $4,251,404 | $149,950 | $356,584 | $323,993 | 1 | $327,561 | $122,713 | $351,536 |
| 2024 | $4,179,818 | $131,812 | $333,127 | $303,313 | 1 | $312,355 | $112,605 | $323,830 |
| 2023 | $4,127,229 | $116,623 | $300,377 | $275,018 | 1 | $282,394 | $100,030 | $285,324 |
| 2022 | $4,091,622 | $93,092 | $132,707 | $108,819 | 1 | $114,619 | $76,061 | $280,807 |
| 2021 | $4,049,827 | $97,091 | $189,708 | $165,977 | 1 | $171,702 | $80,200 | $292,940 |
| 2020 | $4,014,408 | $1,806,909 | $188,384 | $168,766 | 1 | — | $61,478 | $180,737 |
Under IRS private-foundation payout rules, Guestrin Family Foundation reported a distributable amount of $352K for 2025 — the minimum it must pay out in qualifying distributions.
Leadership & Key People
Officers and directors from IRS filings
Guestrin Family Foundation is led by Carlos Guestrin, President & Treasurer since 2025 (on filings since 2020); none of the 2 officers listed in 2025 report compensation.
Officers on the 2025 filing
Carlos Guestrin
President & Treasurer
President & Treasurer → President, 2024
President → President & Treasurer, 2025
On filings since 2020
No compensation reported
Emily Fox
Vice President
President & Treasurer → Vice President & Secretary, 2021
Vice President & Secretary → Vice President, 2024
On filings since 2020
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 Guestrin Family Foundation
How much does Guestrin Family Foundation give each year?
Guestrin Family Foundation gave $324K across 1 grant in 2025, according to its 2025 IRS Form 990-PF. In 2024 it gave $303K across 1 grant.
How large is Guestrin Family Foundation?
Guestrin Family Foundation reported $4.3M in total assets on its 2025 IRS Form 990-PF. It paid out $328K in qualifying distributions that year, against a required minimum of $352K (roughly 5% of its investment assets). Falling short in one year is not a violation: foundations have until the end of the next year to meet the minimum.
Where does Guestrin Family Foundation operate?
Guestrin Family Foundation has awarded grants in New York.
What is Guestrin Family Foundation's EIN?
Guestrin Family Foundation's EIN (Employer Identification Number) is 82-3353232. 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
(2)
When this profile's IRS filing data changed on Grantable
- Added Form 990-PF for fiscal year 2025 (received by the IRS July 22, 2026)
- IRS filings on file for fiscal years 2020–2024
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Guestrin Family Foundation down — hundreds of funders to go?