The SD Mayer Foundation
Foundation's purpose is to give away funds collected to charitable organizations and support nonprofit organizations in the local community.
The SD Mayer Foundation at a glance
In short: The SD Mayer Foundation gave $23K across 3 grants in 2024 (avg $8K), mostly in California. Source: 2024 IRS Form 990.
- Annual giving (2024)
- $23,435
- +941.6% vs 2023
- Grants made (2024)
- 3
- Average grant
- $7,812
- Median grant
- $10,242
- Total assets
- $27,094
- -46.4% vs 2023
- Primary geography
- California (100% of itemized 2024 grant dollars)
- Latest 990 filing
- Form 990, 2024 View filing
Data from IRS Form 990, 2024; updated September 2026.
Who The SD Mayer Foundation funds
How this funder distributes its grants
Top Recipients
Top 3 recipients in 2024
The largest 2024 recipient was Sabore's Well ($11K). Together the top 3 received $23K.
Grant Size Distribution
10 grants across all recorded years
The most common grant size was under $50K: 9 grants of 10 (90%).
Geographic Focus
Where this funder awards grants
Grant Distribution by State
Share of 2024 grant dollars across all 3 itemized grants.
States
Cities
How The SD Mayer Foundation gives
- Giving grew 193% from 2021 to 2024. Method
From the foundation's IRS Form 990 filings. Methodology.
Giving History
Giving Over Time
Total grant dollars and number of grants per year
From 2020 to 2024, annual grant giving ranged from $2K (2023) to $262K (2020). In 2024 it made 3 grants totaling $23K.
Hatched bars: grants paid as reported on the IRS filing, which lists no individual grants for that year.
Grants by year
Grant recipients and amounts by year
| Recipient | Purpose | Amount |
|---|---|---|
| Sabore's Well Redwood City, CA | For General Support | $11,193 |
| The Five Buckets Four Shovels Foundation San Francisco, CA | For General Support | $10,242 |
| San Francisco Giants Community Fund San Francisco, CA | For General Support | $2,000 |
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Financial History
Multi-year comparison from IRS filings
| Filing year | Total Assets | Revenue | Expenses | Grants paid | Grants |
|---|---|---|---|---|---|
| 2024 | $27,094 | $3,321 | $26,743 | $23,435 | 3 |
| 2023 | $50,516 | $21,335 | $8,525 | $2,250 | Total only |
| 2022 | $38,706 | $41,350 | $48,680 | $40,680 | 2 |
| 2021 | $46,036 | $35,056 | $15,775 | $8,000 | 1 |
| 2020 | $110,077 | $360,085 | $347,130 | $262,374 | 4 |
| 2019 | $12,800 | $37,510 | $66,175 | — | — |
"Total only": grants paid as reported on the IRS filing, which lists no individual grants for that year.
About The SD Mayer Foundation
Based on IRS filings
The SD Mayer Foundation is a public charity focused on public and societal benefit, based in San Francisco, CA. IRS filing data is available from 2019 through 2024. As of 2024, the organization holds $27K in total assets. In 2024, it awarded 3 grants totaling $23K.
Focus Areas
Leadership & Key People
Officers and directors from IRS filings
The SD Mayer Foundation is led by Stephen D. Mayer, President on every filing since 2019 — the only officer listed, and uncompensated.
Officers on the 2024 filing
Stephen D. Mayer
President
On filings since 2019
1 hr/week
No compensation reported
Data from IRS Form 990 filings, 2019–2024. "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 The SD Mayer Foundation
How much does The SD Mayer Foundation give each year?
The SD Mayer Foundation gave $23K across 3 grants in 2024, according to its 2024 IRS Form 990. In 2023 it reported $2K in grants paid.
What is The SD Mayer Foundation's typical grant size?
The SD Mayer Foundation's median grant in 2024 was $10,242, and its average grant was $7,812, across 3 grants on its 2024 IRS Form 990.
Where does The SD Mayer Foundation give grants?
The SD Mayer Foundation gives mostly in California: 100% of the grant dollars itemized on its 2024 IRS Form 990 went to recipients there. The most frequent recipient cities were San Francisco, CA (2 grants).
Does The SD Mayer Foundation give general operating support?
Yes: 100% of The SD Mayer Foundation's 2024 grants with a stated purpose (3 of 3) were for general or operating support, per its 2024 IRS Form 990.
How large is The SD Mayer Foundation?
The SD Mayer Foundation reported $27K in total assets on its 2024 IRS Form 990. Its revenue that year was $3K.
What is The SD Mayer Foundation?
The SD Mayer Foundation is a public charity focused on public and societal benefit, based in San Francisco, CA. It holds $27K in total assets as of 2024.
What is The SD Mayer Foundation's EIN?
The SD Mayer Foundation's EIN (Employer Identification Number) is 32-0477420. IRS Form 990 filing data is available on this page for 2019–2024.
Data last updated September 2026. Sourced from IRS Form 990 filings.
Data update history
(7)
When this profile's IRS filing data changed on Grantable
- Updated Form 990-EZ for fiscal year 2019 (received by the IRS August 27, 2020)
- Updated Form 990 for fiscal year 2020 (received by the IRS April 16, 2021)
- Updated Form 990 for fiscal year 2021 (received by the IRS November 15, 2022)
- Updated Form 990 for fiscal year 2022 (received by the IRS November 16, 2023)
- Updated Form 990 for fiscal year 2023 (received by the IRS November 15, 2024)
- Updated Form 990 for fiscal year 2024 (received by the IRS November 15, 2025)
- IRS filings on file for fiscal years 2019–2024
Live grants for the work The SD Mayer Foundation funds
Public, Societal Benefit Open opportunities, soonest deadline first.
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