Porter Family Foundation
Porter Family Foundation is a private foundation, based in San Mateo, CA. IRS filing data is available from 2020 through 2025. As of 2025, the organization holds $1K in total assets. In 2025, it awarded 5 grants totaling $23K. Net investment income was $1.
Porter Family Foundation at a glance
In short: Porter Family Foundation gave $23K across 5 grants in 2025 (avg $5K), mostly in California. Source: 2025 IRS Form 990-PF.
- Annual giving (2025)
- $22,500
- +32.4% vs 2024
- Grants made (2025)
- 5
- +25.0% vs 2024
- Average grant
- $4,500
- +5.9% vs 2024
- Median grant
- $2,500
- Total assets
- $1,215
- -87.8% vs 2024
- Primary geography
- California (96% 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 Porter Family Foundation funds
How this funder distributes its grants
Top Recipients
Top 3 recipients in 2025
The largest 2025 recipient was Town School for Boys ($10K). Together the top 3 received $13K.
Organizations only. It also paid 2 grants to individuals ($10,000), which are not listed by name.
Grant Size Distribution
24 grants across all recorded years
The most common grant size was under $50K: 24 grants of 24 (100%).
Geographic Focus
Where this funder awards grants
Grant Distribution by State
Share of 2025 grant dollars across all 5 itemized grants.
Cities
How Porter Family Foundation gives
- Giving grew 4028% from 2022 to 2025. 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 $545 (2022) to $26K (2023). In 2025 it made 5 grants totaling $23K.
Grants by year
Grant recipients and amounts by year
| Recipient | Purpose | Amount |
|---|---|---|
| Town School for Boys San Francisco, CA | For Cause | $10,000 |
| 2 grants to individuals Recipients not named | — | $10,000 |
| Bay Area Discovery Museum Sausalito, CA | For Cause | $1,500 |
| Minneapolis Public Schools Minneapolis, MN | For Cause | $1,000 |
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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 |
|---|---|---|---|---|---|---|---|
| 2025 | $1,215 | $15,001 | $23,777 | $22,500 | 5 | $22,500 | $1 |
| 2024 | $9,991 | $25,001 | $17,177 | $17,000 | 4 | $17,000 | $1 |
| 2023 | $2,167 | $1 | $26,996 | $26,202 | 9 | $26,202 | $1 |
| 2022 | $29,162 | $25,000 | $625 | $545 | 2 | $545 | — |
| 2021 | $4,787 | $1 | $8,590 | $8,500 | 4 | — | $1 |
| 2020 | $13,376 | $7 | $19,581 | $19,500 | 5 | — | $7 |
Leadership & Key People
Officers and directors from IRS filings
Porter Family Foundation is led by Stephen L. Porter, CEO on every filing since 2020; none of the 2 officers listed in 2025 report compensation.
Officers on the 2025 filing
Stephen L. Porter
CEO
On filings since 2020
No compensation reported
Patricia Porter
CFO
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 Porter Family Foundation
How much does Porter Family Foundation give each year?
Porter Family Foundation gave $23K across 5 grants in 2025, according to its 2025 IRS Form 990-PF. In 2024 it gave $17K across 4 grants.
What is Porter Family Foundation's typical grant size?
Porter Family Foundation's median grant in 2025 was $2,500, and its average grant was $4,500, across 5 grants on its 2025 IRS Form 990-PF.
Where does Porter Family Foundation give grants?
Porter Family Foundation gives mostly in California: 96% of the grant dollars itemized on its 2025 IRS Form 990-PF went to recipients there.
Does Porter Family Foundation give general operating support?
Not in 2025: none of the 5 grants with a stated purpose on Porter Family Foundation's 2025 IRS Form 990-PF were described as general or operating support. Recurring purposes include "For Cause" (5 grants).
Who are Porter Family Foundation's largest grantees?
Porter Family Foundation's largest 2025 grantees include Town School for Boys ($10,000), Bay Area Discovery Museum ($1,500) and Minneapolis Public Schools ($1,000), according to its 2025 IRS Form 990-PF. It also paid 2 grants to individuals ($10,000), which are not listed by name. Together they received 56% of its itemized 2025 grant dollars.
How large is Porter Family Foundation?
Porter Family Foundation reported $1K in total assets on its 2025 IRS Form 990-PF. Its revenue that year was $15K.
What is Porter Family Foundation's EIN?
Porter Family Foundation's EIN (Employer Identification Number) is 20-0128645. 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
(7)
When this profile's IRS filing data changed on Grantable
- Updated Form 990-PF for fiscal year 2020 (received by the IRS April 9, 2021)
- Updated Form 990-PF for fiscal year 2021 (received by the IRS December 9, 2021)
- Updated Form 990-PF for fiscal year 2022 (received by the IRS April 6, 2023)
- Updated Form 990-PF for fiscal year 2023 (received by the IRS December 11, 2023)
- Updated Form 990-PF for fiscal year 2024 (received by the IRS August 20, 2024)
- Updated Form 990-PF for fiscal year 2025 (received by the IRS September 15, 2025)
- IRS filings on file for fiscal years 2020–2025
Live grants for the work Porter Family Foundation funds
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