Foster Foundation
Foster Foundation is a private foundation, based in San Diego, CA. IRS filing data is available from 2020 through 2023. As of 2023, the organization holds $2.5M in total assets. In 2023, it awarded 2 grants totaling $148K. Net investment income was $20K.
Foster Foundation at a glance
In short: Foster Foundation gave $148K across 2 grants in 2023 (avg $74K), mostly in California. Source: 2023 IRS Form 990-PF.
- Annual giving (2023)
- $147,503
- -32.0% vs 2022
- Grants made (2023)
- 2
- -33.3% vs 2022
- Average grant
- $73,752
- +1.9% vs 2022
- Median grant
- $73,752
- Total assets
- $2,524,097
- -3.0% vs 2022
- Primary geography
- California (100% of itemized 2023 grant dollars)
- Latest 990 filing
- Form 990-PF, 2023 View filing
Data from IRS Form 990-PF, 2023; updated September 2026.
How to apply to Foster Foundation
Open Grants
1 open opportunity from Foster Foundation
Who Foster Foundation funds
How this funder distributes its grants
Top Recipients
Top 2 recipients in 2023
The largest 2023 recipient was UCK Institute for Research on Aging ($98K). Together the top 2 received $148K.
Grant Size Distribution
15 grants across all recorded years
The most common grant size was under $50K: 8 grants of 15 (53%).
Geographic Focus
Where this funder awards grants
Grant Distribution by State
Share of 2023 grant dollars across all 2 itemized grants.
Cities
How Foster Foundation gives
- Giving fell 38% from 2020 to 2023. Method
- In 2023 it paid out 108% 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 2020 to 2023, annual grant giving ranged from $148K (2023) to $237K (2020). In 2023 it made 2 grants totaling $148K.
Grants by year
Grant recipients and amounts by year
| Recipient | Purpose | Amount |
|---|---|---|
| UCK Institute for Research on Aging Novato, CA | General Support | $97,503 |
| Carl I Bourhenne Medical Research Newport Beach, CA | General Support | $50,000 |
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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 |
|---|---|---|---|---|---|---|---|---|
| 2023 | $2,524,097 | $68,816 | $179,778 | $147,503 | 2 | $147,503 | $20,494 | $137,136 |
| 2022 | $2,603,041 | $290,232 | $268,290 | $217,068 | 3 | $217,068 | $219,841 | $132,950 |
| 2021 | $2,563,116 | $227,638 | $270,195 | $229,757 | 5 | — | $187,282 | $132,794 |
| 2020 | $2,605,148 | $-239,111 | $243,209 | $237,048 | 5 | — | $47,247 | $144,187 |
Under IRS private-foundation payout rules, Foster Foundation reported a distributable amount of $137K for 2023 — the minimum it must pay out in qualifying distributions.
Leadership & Key People
Officers and directors from IRS filings
Foster Foundation is led by Winslow J. Foster III, President on every filing since 2020; none of the 3 officers listed in 2023 report compensation.
Officers on the 2023 filing
Winslow J. Foster III
President
On filings since 2020
2 hrs/week
No compensation reported
Anna L. Foster
Chairman
On filings since 2020
0.5 hrs/week
No compensation reported
Tanya L. Foster
Director
On filings since 2020
0.5 hrs/week
No compensation reported
Data from IRS Form 990 filings, 2020–2023. "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 Foster Foundation
How much does Foster Foundation give each year?
Foster Foundation gave $148K across 2 grants in 2023, according to its 2023 IRS Form 990-PF. In 2022 it gave $217K across 3 grants.
How large is Foster Foundation?
Foster Foundation reported $2.5M in total assets on its 2023 IRS Form 990-PF. It paid out $148K in qualifying distributions that year, against a required minimum of $137K (roughly 5% of its investment assets).
Where does Foster Foundation operate?
Foster Foundation has awarded grants in California, District of Columbia, New York, Texas.
What is Foster Foundation's EIN?
Foster Foundation's EIN (Employer Identification Number) is 27-3200226. IRS Form 990 filing data is available on this page for 2020–2023.
Data last updated September 2026. Sourced from IRS Form 990-PF filings.
Data update history
(1)
When this profile's IRS filing data changed on Grantable
- IRS filings on file for fiscal years 2020–2023
Live grants for the work Foster Foundation funds
Philanthropy, Voluntarism & Grantmaking Open opportunities, soonest deadline first.
- Nixa Affiliate Grantmaking Program Up to US $10,000 · Due October 19, 2026
- Community and School Grants $28,000 total pool; 10-15 grants expected · Due October 19, 2026
- Mary Pinola/Crescenta Valley Chamber Education Fund $500 - $5,000 for ongoing programs; up to $15,000 for Strategic Initiative Grants · Due October 19, 2026
Explore Open Grants
Browse active grant opportunities in Foster Foundation's focus areas in our free grants database
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Foster Foundation down — hundreds of funders to go?