Kalonymus Foundation
Kalonymus Foundation is a private foundation, based in San Francisco, CA. IRS filing data is available from 2020 through 2024. As of 2024, the organization holds $4.3M in total assets. In 2024, it awarded 1 grant totaling $163K. Net investment income was $376K.
Kalonymus Foundation at a glance
In short: Kalonymus Foundation gave $163K across 1 grant in 2024 (avg $163K), mostly in New York. Source: 2024 IRS Form 990-PF.
- Annual giving (2024)
- $163,276
- +9.5% vs 2023
- Grants made (2024)
- 1
- -50.0% vs 2023
- Average grant
- $163,276
- +119.0% vs 2023
- Median grant
- $163,276
- Total assets
- $4,302,845
- +23.0% vs 2023
- Primary geography
- New York (100% of itemized 2024 grant dollars)
- Latest 990 filing
- Form 990-PF, 2024 View filing
Data from IRS Form 990-PF, 2024; updated September 2026.
Who Kalonymus Foundation funds
How this funder distributes its grants
Grant Size Distribution
7 grants across all recorded years
The most common grant size was in the $100–250K range: 3 grants of 7 (43%).
Geographic Focus
Where this funder awards grants
Grant Distribution by State
Share of the 2024 grant dollars on its one itemized grant.
Cities
How Kalonymus Foundation gives
- Giving grew 81% from 2021 to 2024. Method
- In 2024 it paid out 66% 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 2024, annual grant giving ranged from $61K (2020) to $163K (2024). In 2024 it made 1 grant totaling $163K.
Grants by year
Grant recipients and amounts by year
| Recipient | Purpose | Amount |
|---|---|---|
| 1 individual scholarship Recipients not named | — | $163,276 |
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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 |
|---|---|---|---|---|---|---|---|---|
| 2024 | $4,302,845 | $1,067,251 | $267,370 | $163,276 | 1 | $163,276 | $375,785 | $247,503 |
| 2023 | $3,498,669 | $463,706 | $177,770 | $149,088 | 2 | $149,088 | $45,298 | $163,276 |
| 2022 | $3,212,733 | $370,756 | $163,495 | $138,198 | 1 | $138,198 | $46,420 | $149,088 |
| 2021 | $3,005,472 | $1,240,989 | $117,273 | $90,346 | 2 | $90,346 | $33,738 | $138,198 |
| 2020 | $1,942,267 | $347,945 | $101,399 | $61,454 | 1 | — | $222,708 | $90,346 |
Under IRS private-foundation payout rules, Kalonymus Foundation reported a distributable amount of $248K for 2024 — the minimum it must pay out in qualifying distributions.
Leadership & Key People
Officers and directors from IRS filings
Kalonymus Foundation is led by Ron D. Zeff, President, Treasurer & D on every filing since 2020; none of the 2 officers listed in 2024 report compensation.
Officers on the 2024 filing
Ron D. Zeff
President, Treasurer & D
On filings since 2020
1 hr/week
No compensation reported
Maximilian M. Zeff
Secretary
On filings since 2020
1 hr/week
No compensation reported
Data from IRS Form 990 filings, 2020–2024. "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 Kalonymus Foundation
How much does Kalonymus Foundation give each year?
Kalonymus Foundation gave $163K across 1 grant in 2024, according to its 2024 IRS Form 990-PF. In 2023 it gave $149K across 2 grants.
How large is Kalonymus Foundation?
Kalonymus Foundation reported $4.3M in total assets on its 2024 IRS Form 990-PF. It paid out $163K in qualifying distributions that year, against a required minimum of $248K (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 Kalonymus Foundation operate?
Kalonymus Foundation has awarded grants in California, Connecticut, Massachusetts, New York, Texas.
What is Kalonymus Foundation's EIN?
Kalonymus Foundation's EIN (Employer Identification Number) is 47-4622631. IRS Form 990 filing data is available on this page for 2020–2024.
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 2020–2024
Live grants for the work Kalonymus Foundation funds
Philanthropy, Voluntarism & Grantmaking Open opportunities, soonest deadline first.
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Browse active grant opportunities in Kalonymus Foundation's focus areas in our free grants database
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