The Jacob & Ruth Mazer Foundation
The Jacob & Ruth Mazer Foundation is a private foundation focused on Community and economic development, based in Denver, CO. IRS filing data is available from 2019 through 2025. As of 2025, the organization holds $347K in total assets. In 2025, it awarded 20 grants totaling $38K. Net investment income was $48K.
Key facts about The Jacob & Ruth Mazer Foundation
In short: The Jacob & Ruth Mazer Foundation gave $38K across 20 grants in 2025 (avg $2K), mostly in New York. 30% of 2025 grantees were new. Source: 2025 IRS Form 990-PF.
- EIN
- 13-6115875
- Latest 990 filing
- Form 990-PF, 2025
- Annual giving (2025)
- $37,550
- Grants made (2025)
- 20
- Average grant
- $1,878
- Median grant
- $1,000
- New grantees (estimate)
- 30% first-time grantees (6 of 20, 2025)
- Total assets
- $347,469
- Primary geography
- New York (51% of itemized 2025 grant dollars)
Data from IRS Form 990-PF, 2025; updated September 2026. New grantees are estimated by matching recipient names across years (methodology).
Financial Overview
From 2025 IRS Form 990-PF · View filing
Total Assets
$347K
+3.1% YoY
Annual Giving
$38K
+2.0% YoY
Grant Count
20
+81.8% YoY
Avg Grant Size
$2K
-43.9% YoY
Under IRS private-foundation payout rules, The Jacob & Ruth Mazer Foundation reported a distributable amount of $31K for 2025 — the minimum it must pay out in qualifying distributions.
Is The Jacob & Ruth Mazer Foundation open to new grantees?
30%
first-time grantees, 2025
In 2025, 6 of 20 grantees (30%) were first-time recipients. First grants averaged $867; repeat grants $2K. How we count
Medians: $850 first-time, $1K repeat.
- 40% of 2025 grantees were also funded in 2024. Method
- Giving held roughly steady from 2022 to 2025 (−4%). Method
- In 2025 it paid out 120% of its IRS minimum distribution (the 5% rule). Method
Estimate from itemized grant lists in IRS Form 990-PF filings (2019–2025). Recipient names are matched across years, so a renamed or misspelled grantee can look new; grants to individuals are left out. Methodology.
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Geographic Focus
Where this funder awards grants
Grant Distribution by State
Share of all 20 itemized 2025 grant dollars.
States
Cities
Giving Over Time
Total grant dollars and number of grants per year
Grant Insights
How this funder distributes its grants
Top Recipients
Top 10 recipients in 2025
Grant Size Distribution
62 grants across all recorded years
Giving History
Grant recipients and amounts by year
| Recipient | Purpose | Amount |
|---|---|---|
| PLANNED PARENTHOOD New York, NY | GENERAL GRANT | $8,500 |
| CIVIC CANOPY Denver, CO | GENERAL GRANT | $5,000 |
| ACLU FOUNDATION New York, NY | GENERAL GRANT | $5,000 |
| YALE ALUMNI New York, NY | GENERAL GRANT | $3,000 |
| OSBORNE ASSOCIATION Bronx, NY | GENERAL GRANT | $2,800 |
| JEWISH COLORADO Denver, CO | GENERAL GRANT | $2,750 |
| CAMP KESEM Covina, CA | GENERAL GRANT | $1,500 |
| GREENWICH HOSPITAL FOUNDATION Cos Cob, CT | GENERAL GRANT | $1,000 |
| DENVER MUSEUM OF NATURE SCIENCE Denver, CO | GENERAL GRANT | $1,000 |
| FRIENDS OF CASCO BAY Portland, ME | GENERAL GRANT | $1,000 |
Financial History
Multi-year comparison from IRS filings
| Metric | 2025 | 2024 | 2023 |
|---|---|---|---|
| Total Assets | $347,469 | $337,040 | $356,361 |
| Revenue | $54,150 | $23,732 | $19,929 |
| Expenses | $43,721 | $43,053 | $32,727 |
| Qualifying Distributions | $37,550 | $36,800 | $25,200 |
| Net Investment Income | $48,225 | $17,670 | $13,749 |
| Distributable Amount | $31,379 | $29,277 | $25,344 |
Data update history
When this profile's IRS filing data changed on Grantable
- Updated Form 990-PF for fiscal year 2019 (received by the IRS June 22, 2020)
- Updated Form 990-PF for fiscal year 2020 (received by the IRS July 20, 2021)
- Updated Form 990-PF for fiscal year 2021 (received by the IRS May 11, 2022)
- Updated Form 990-PF for fiscal year 2022 (received by the IRS May 10, 2023)
- Updated Form 990-PF for fiscal year 2023 (received by the IRS April 30, 2024)
- Updated Form 990-PF for fiscal year 2024 (received by the IRS May 7, 2025)
- Updated Form 990-PF for fiscal year 2025 (received by the IRS May 7, 2026)
- Added Form 990-PF for fiscal year 2019 (received by the IRS June 22, 2020)
- Updated Form 990-PF for fiscal year 2020 (received by the IRS July 20, 2021)
- Updated Form 990-PF for fiscal year 2021 (received by the IRS May 11, 2022)
- Updated Form 990-PF for fiscal year 2022 (received by the IRS May 10, 2023)
- Updated Form 990-PF for fiscal year 2023 (received by the IRS April 30, 2024)
Leadership & Key People
Officers and directors from IRS filings
The Jacob & Ruth Mazer Foundation is led by Michael Mazer, President on every filing since 2019; none of the 2 officers listed in 2025 report compensation.
Officers on the 2025 filing
Michael Mazer
President
On filings since 2019
No compensation reported
Harriet Mazer
Treasurer
On filings since 2019
No compensation reported
Data from IRS Form 990 filings, 2019–2025. "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 The Jacob & Ruth Mazer Foundation
How much does The Jacob & Ruth Mazer Foundation give each year?
The Jacob & Ruth Mazer Foundation gave $38K across 20 grants in 2025, according to its 2025 IRS Form 990-PF. In 2024 it gave $37K across 11 grants.
What is The Jacob & Ruth Mazer Foundation's typical grant size?
The Jacob & Ruth Mazer Foundation's median grant in 2025 was $1,000, and its average grant was $1,878, across 20 grants on its 2025 IRS Form 990-PF. Organizations receiving their first grant from The Jacob & Ruth Mazer Foundation that year got $867 on average.
Where does The Jacob & Ruth Mazer Foundation give grants?
The Jacob & Ruth Mazer Foundation gives mostly in New York: 51% of the grant dollars itemized on its 2025 IRS Form 990-PF went to recipients there. The next largest states were Colorado (23%) and Maine (12%). The most frequent recipient cities were New York, NY (3 grants), Denver, CO (3 grants), Portland, ME (3 grants) and Yarmouth, ME (2 grants).
Does The Jacob & Ruth Mazer Foundation give general operating support?
Yes: 100% of The Jacob & Ruth Mazer Foundation's 2025 grants with a stated purpose (20 of 20) were for general or operating support, per its 2025 IRS Form 990-PF.
Who are The Jacob & Ruth Mazer Foundation's largest grantees?
The Jacob & Ruth Mazer Foundation's largest 2025 grantees include Planned Parenthood ($8,500), Civic Canopy ($5,000) and Aclu Foundation ($5,000), according to its 2025 IRS Form 990-PF. Together they received 49% of its itemized 2025 grant dollars.
How large is The Jacob & Ruth Mazer Foundation?
The Jacob & Ruth Mazer Foundation reported $347K in total assets on its 2025 IRS Form 990-PF. It paid out $38K in qualifying distributions that year, against a required minimum of $31K (roughly 5% of its investment assets).
What is The Jacob & Ruth Mazer Foundation?
The Jacob & Ruth Mazer Foundation is a private foundation focused on Community and economic development, based in Denver, CO. It holds $347K in total assets as of 2025.
What is The Jacob & Ruth Mazer Foundation's EIN?
The Jacob & Ruth Mazer Foundation's EIN (Employer Identification Number) is 13-6115875. IRS Form 990 filing data is available on this page for 2019–2025.
Data last updated September 2026. Sourced from IRS Form 990-PF filings.
Here's the math on researching The Jacob & Ruth Mazer Foundation by hand.
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