Robert and Adelaide May Zimmerman
Robert and Adelaide May Zimmerman is a private foundation, based in Pasadena, CA. IRS filing data is available from 2019 through 2025. As of 2025, the organization holds $1.5M in total assets. In 2025, it awarded 3 grants totaling $74K. Net investment income was $50K.
Robert and Adelaide May Zimmerman at a glance
In short: Robert and Adelaide May Zimmerman gave $74K across 3 grants in 2025 (avg $25K), mostly in California. Source: 2025 IRS Form 990-PF.
- Annual giving (2025)
- $73,500
- -18.3% vs 2024
- Grants made (2025)
- 3
- +0.0% vs 2024
- Average grant
- $24,500
- -18.3% vs 2024
- Median grant
- $18,375
- Total assets
- $1,534,172
- -2.2% vs 2024
- Primary geography
- California (100% 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 Robert and Adelaide May Zimmerman funds
How this funder distributes its grants
Top Recipients
Top 3 recipients in 2025
The largest 2025 recipient was Huntington Library ($37K). Together the top 3 received $74K.
Grant Size Distribution
15 grants across all recorded years
The most common grant size was under $50K: 15 grants of 15 (100%).
Geographic Focus
Where this funder awards grants
Grant Distribution by State
Share of 2025 grant dollars across all 3 itemized grants.
States
Cities
How Robert and Adelaide May Zimmerman gives
- Giving held roughly steady from 2022 to 2025 (−18%). Method
- In 2025 it paid out 83% 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 2019 to 2025, annual grant giving ranged from $74K (2025) to $92K (2021). In 2025 it made 3 grants totaling $74K.
Grants by year
Grant recipients and amounts by year
| Recipient | Purpose | Amount |
|---|---|---|
| Huntington Library San Marino, CA | General | $36,750 |
| Pasadena Hospital Association Pasadena, CA | General | $18,375 |
| Learning Works Pasadena, CA | General | $18,375 |
Ready to take the next step with Robert and Adelaide May Zimmerman?
Financial History
Multi-year comparison from IRS filings
| Filing year | Total Assets | Revenue | Expenses | Grants paid | Grants | Qualifying Distributions | Net Investment Income | Distributable Amount |
|---|---|---|---|---|---|---|---|---|
| 2025 | $1,534,172 | $67,123 | $109,926 | $73,500 | 3 | $91,715 | $50,281 | $110,796 |
| 2024 | $1,568,371 | $197,737 | $126,282 | $90,000 | 3 | $108,140 | $179,595 | $101,675 |
| 2023 | $1,494,023 | $88,229 | $123,776 | $90,000 | 3 | $106,889 | $71,342 | $83,725 |
| 2022 | $1,523,247 | $87,624 | $126,118 | $90,000 | 3 | $108,015 | $69,611 | $99,658 |
| 2021 | $1,558,147 | $42,667 | $149,938 | $92,000 | 3 | — | $13,696 | $97,213 |
| 2020 | $1,671,195 | $63,722 | $120,667 | $86,625 | 3 | — | $46,151 | $102,397 |
| 2019 | $1,725,714 | $64,848 | $108,349 | $90,250 | 3 | — | $55,450 | $105,765 |
Under IRS private-foundation payout rules, Robert and Adelaide May Zimmerman reported a distributable amount of $111K for 2025 — the minimum it must pay out in qualifying distributions.
Leadership & Key People
Officers and directors from IRS filings
Robert and Adelaide May Zimmerman's 2025 filing lists 2 officers; all 2 officers listed in 2025 are compensated.
Officers on the 2025 filing
Peter Boyle
Trustee
Co-Trustee → Trustee, 2021
On filings since 2019
1 hr/week
$15K (2021) → $8K (2025)
Walter G. Franz Jr.
Trustee
Co-Trustee → Trustee, 2021
On filings since 2019
1 hr/week
$15K (2021) → $8K (2025)
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.
Compensation Overview
From 2025 IRS filing
The highest reported compensation on the 2025 filing was $8K, to Peter Boyle (Trustee). 2 officers or directors reported compensation on that filing.
Frequently asked questions about Robert and Adelaide May Zimmerman
How much does Robert and Adelaide May Zimmerman give each year?
Robert and Adelaide May Zimmerman gave $74K across 3 grants in 2025, according to its 2025 IRS Form 990-PF. In 2024 it gave $90K across 3 grants.
What is Robert and Adelaide May Zimmerman's typical grant size?
Robert and Adelaide May Zimmerman's median grant in 2025 was $18,375, and its average grant was $24,500, across 3 grants on its 2025 IRS Form 990-PF.
Where does Robert and Adelaide May Zimmerman give grants?
Robert and Adelaide May Zimmerman gives mostly in California: 100% of the grant dollars itemized on its 2025 IRS Form 990-PF went to recipients there. The most frequent recipient cities were Pasadena, CA (2 grants).
Does Robert and Adelaide May Zimmerman give general operating support?
Yes: 100% of Robert and Adelaide May Zimmerman's 2025 grants with a stated purpose (3 of 3) were for general or operating support, per its 2025 IRS Form 990-PF.
How large is Robert and Adelaide May Zimmerman?
Robert and Adelaide May Zimmerman reported $1.5M in total assets on its 2025 IRS Form 990-PF. It paid out $92K in qualifying distributions that year, against a required minimum of $111K (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.
What is Robert and Adelaide May Zimmerman's EIN?
Robert and Adelaide May Zimmerman's EIN (Employer Identification Number) is 95-6809322. 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.
Data update history
(8)
When this profile's IRS filing data changed on Grantable
- Updated Form 990-PF for fiscal year 2019 (received by the IRS December 12, 2019)
- Updated Form 990-PF for fiscal year 2020 (received by the IRS February 10, 2021)
- Updated Form 990-PF for fiscal year 2021 (received by the IRS November 23, 2021)
- Updated Form 990-PF for fiscal year 2022 (received by the IRS January 19, 2023)
- Updated Form 990-PF for fiscal year 2023 (received by the IRS January 8, 2024)
- Updated Form 990-PF for fiscal year 2024 (received by the IRS November 4, 2024)
- Updated Form 990-PF for fiscal year 2025 (received by the IRS March 14, 2026)
- IRS filings on file for fiscal years 2019–2025
Other open foundation grants in California
California Open opportunities, soonest deadline first.
Explore Open Grants
Browse active grant opportunities in Robert and Adelaide May Zimmerman's focus areas in our free grants database
Similar Funders
Funders with grantees in common, and similar funders in California
Collis P & Howard Huntington Memorial Hospital Trust
Pasadena, CA
The organization is a charitable trust and operates solely for the benefit of pasadena hospital association ltd (dba huntington health).
Assets
$391.4M
Grants
1
Total Given
$13.4M
The Tadashi Foundation
Vernon, CA
Assets
—
Grants
1
Total Given
$5K
The Mayor's Fund for Los Angeles
Los Angeles, CA
The Mayor’s Fund for Los Angeles supports homelessness prevention and housing stability, including tenant legal services, outreach and case management, and services for youth transitioning out of foster care. Its 2025 grants ranged from $25,000 to $935,000, with a median of $125,000, and supported organizations serving Angelenos. The profile does not state whether it accepts unsolicited requests.
Assets
$7.9M
Grants
9
Total Given
$2.6M
Hotchkis Foundation
Los Angeles, CA
The Hotchkis Foundation supports a varied mix of charitable organizations, including schools, arts and cultural groups, conservation, health, and youth organizations, primarily in California. Its 2025 grants ranged from $2,000 to $22,000, with a median of $5,000. It gives only to preselected organizations and does not accept unsolicited requests.
Assets
$2.1M
Grants
13
Total Given
$102K
The Randall Family Foundation
Westlake Village, CA
The Randall Family Foundation supports arts, education, healthcare, mental health, medical research, preventative care, and community organizations, primarily in California. Its 2025 grants ranged from $1,000 to $5 million, with a median of $25,000. It funds only preselected organizations and does not accept unsolicited requests.
Assets
$1.4M
Grants
15
Total Given
$5.7M
Grace and Li Yu Family Foundation
Los Angeles, CA
The foundation supports a varied range of charitable organizations, including cultural, health, humanitarian, educational, and religious causes, with nearly all 2025 funding going to California. Its 20 grants ranged from $100 to $187,500, with a median grant of $10,000. It does not accept unsolicited requests and gives only to preselected organizations.
Assets
$7.4M
Grants
20
Total Given
$619K
More similar funders
More Funders in California
The filing figures on this page are open data under CC BY 4.0. About GrantGraph Open
Figures come from Robert and Adelaide May Zimmerman's IRS filings (methodology). AI-written summaries, news items and logos are not covered by the open licence. Spot an error? Email hello@grantable.co.
Robert and Adelaide May Zimmerman down — hundreds of funders to go?