Carol and Warren Sinsheimer
Carol and Warren Sinsheimer is a private foundation based in San Luis Obispo, California. Its 2025 filing reports 23 grants totaling $11,800, including support for charitable organizations working in public healthcare, senior nutrition, community arts, public welfare, and environmental conservation.
Carol and Warren Sinsheimer at a glance
In short: Carol and Warren Sinsheimer gave $12K across 23 grants in 2025 (avg $513.043), mostly in California. Source: 2025 IRS Form 990-PF.
- Annual giving (2025)
- $11,800
- -16.9% vs 2024
- Grants made (2025)
- 23
- +15.0% vs 2024
- Average grant
- $513
- -27.7% vs 2024
- Median grant
- $500
- Total assets
- $82,418
- -11.8% vs 2024
- Primary geography
- California (89% of itemized 2025 grant dollars)
- Latest 990 filing
- Form 990-PF, 2025 View filing
Data from IRS Form 990-PF, 2025; updated October 2026.
How to apply to Carol and Warren Sinsheimer
- Accepts unsolicited proposals
- No
- How to Apply
-
The foundation states that it makes contributions only to preselected charitable organizations and does not accept unsolicited requests for funds.
- Contact
Mailing address: 1745 Tiburon Way, San Luis Obispo, CA 93401
Phone: (805) 544-7195
Application details from Grantable's research on the foundation's public materials; confirm on its website before applying.
Who Carol and Warren Sinsheimer funds
How this funder distributes its grants
Top Recipients
Top 10 recipients in 2025
The largest 2025 recipient was SLO Noor Foundation ($3K). Together the top 10 received $9K.
Grant Size Distribution
98 grants across all recorded years
The most common grant size was under $50K: 98 grants of 98 (100%).
Geographic Focus
Where this funder awards grants
In 2025, 89% of grant dollars went to recipients in California. The remaining shares went to Utah (4%), Washington, D.C. (3%), Washington (2%), and New York (1%).
Grant Distribution by State
Share of 2025 grant dollars across all 23 itemized grants.
Cities
How Carol and Warren Sinsheimer gives
- 65% of 2025 grantees were also funded in 2024. Method
- Giving fell 47% from 2022 to 2025. Method
- In 2025 it paid out 72% of its IRS minimum distribution (the 5% rule). Foundations have until the end of the next year to meet it. Method
Estimate from itemized grant lists in IRS Form 990-PF filings (2025). Recipient names are matched across years, so a renamed or misspelled grantee can look new; grants to individuals are left out. Methodology.
Giving History
Giving Over Time
Total grant dollars and number of grants per year
From 2019 to 2025, annual grant giving ranged from $8K (2023) to $22K (2022). In 2025 it made 23 grants totaling $12K.
Grants by year
Grant recipients and amounts by year
| Recipient | Purpose | Amount |
|---|---|---|
| SLO Noor Foundation San Luis Obispo, CA | Public Healthcare | $2,500 |
| Meals That Connect San Luis Obispo, CA | Nutrition and Support for Seniors | $1,000 |
| SLO Repertory Theatre San Luis Obispo, CA | Support Arts in the Community | $1,000 |
| Transitions Mental Health Assoc San Luis Obispo, CA | Public Welfare | $1,000 |
| SLO International Film Festival San Luis Obispo, CA | Support Arts in the Community | $1,000 |
| Community Counseling Center San Luis Obispo, CA | General Fund Support | $500 |
| Hospice of SLO County San Luis Obispo, CA | General Fund Support | $500 |
| Lumina Alliance San Luis Obispo, CA | General Fund Support | $500 |
| Mono Lake Committee Lee Vining, CA | Environmental Conservation | $500 |
| Planned Parenthood San Luis Obispo, CA | Public Healthcare | $500 |
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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 |
|---|---|---|---|---|---|---|---|---|
| 2025 | $82,418 | $3,113 | $14,176 | $11,800 | 23 | $12,350 | $2,437 | $17,247 |
| 2024 | $93,481 | $2,796 | $16,547 | $14,200 | 20 | $14,744 | $2,126 | $14,428 |
| 2023 | $107,232 | $2,516 | $10,317 | $8,000 | 14 | $8,538 | $1,852 | $13,097 |
| 2022 | $115,033 | $2,269 | $24,688 | $22,425 | 19 | $22,950 | $1,618 | $16,425 |
| 2021 | $137,452 | $51,971 | $17,802 | $15,500 | 22 | — | $1,317 | $13,837 |
| 2019 | $87,130 | $26,458 | $9,007 | $8,750 | 4 | — | $1,333 | $8,506 |
Under IRS private-foundation payout rules, Carol and Warren Sinsheimer reported a distributable amount of $17K for 2025 — the minimum it must pay out in qualifying distributions.
Research compiled by Grantable AI from public sources. Last updated September 2026.
Mission & Focus Areas
No mission statement for the foundation is provided. Its 2025 grants include support for healthcare, senior services, arts, mental health, domestic violence and sexual assault services, and environmental conservation.
Among its grantees, Lumina Alliance describes its mission as assisting victims of domestic violence and sexual assault and their children. Friends of Alta says it works to protect Alta’s environment, watershed, and wildlife habitat, preserve the community’s character and heritage, and encourage stewardship and sustainability. The ACLU describes its mission as advancing civil liberties and rights throughout the United States and its jurisdictions. The Southern Poverty Law Center describes its mission as advancing racial justice and human rights, dismantling white supremacy, and strengthening intersectional movements.
Grantmaking
In 2025, the foundation made 23 grants totaling $11,800. Grants ranged from $100 to $2,500, with a median grant of $500.
The largest 2025 grant was $2,500 to SLO Noor Foundation for public healthcare. Other notable grants included $1,000 each to Meals That Connect for nutrition and support for seniors, SLO Repertory Theatre and SLO International Film Festival to support community arts, and Transitions Mental Health Association for public welfare. The foundation also gave $500 each to Lumina Alliance for general fund support, Mono Lake Committee for environmental conservation, and Friends of Alta for environmental conservation.
Leadership & Key People
Leadership team and compensation from IRS filings
The 2025 filing lists Warren A. Sinsheimer III as president, Carol Sinsheimer as secretary/vice president, and Warren Angus Sinsheimer and Amy E. Sinsheimer as directors.
Carol and Warren Sinsheimer is led by Warren A. Sinsheimer III, President on every filing since 2019; none of the 4 officers listed in 2025 report compensation.
Officers on the 2025 filing
Warren A. Sinsheimer III
President
On filings since 2019
0.5 hrs/week
No compensation reported
Amy E. Sinsheimer
Director
On filings since 2019
No compensation reported
Warren Angus Sinsheimer
Director
On filings since 2019
No compensation reported
Carol Sinsheimer
Secretary & Vice President
On filings since 2019
0.5 hrs/week
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 Carol and Warren Sinsheimer
How much does Carol and Warren Sinsheimer give each year?
Carol and Warren Sinsheimer gave $12K across 23 grants in 2025, according to its 2025 IRS Form 990-PF. In 2024 it gave $14K across 20 grants.
What is Carol and Warren Sinsheimer's typical grant size?
Carol and Warren Sinsheimer's median grant in 2025 was $500, and its average grant was $513, across 23 grants on its 2025 IRS Form 990-PF.
Where does Carol and Warren Sinsheimer give grants?
Carol and Warren Sinsheimer gives mostly in California: 89% of the grant dollars itemized on its 2025 IRS Form 990-PF went to recipients there. The most frequent recipient cities were San Luis Obispo, CA (15 grants) and Washington, DC (2 grants).
Does Carol and Warren Sinsheimer give general operating support?
Yes: 22% of Carol and Warren Sinsheimer's 2025 grants with a stated purpose (5 of 23) were for general or operating support, per its 2025 IRS Form 990-PF. Recurring purposes include "Environmental Conservation" (5 grants), "Public Welfare" (4 grants) and "Support Arts in the Community" (4 grants).
Who are Carol and Warren Sinsheimer's largest grantees?
Carol and Warren Sinsheimer's largest 2025 grantees include SLO Noor Foundation ($2,500), Meals That Connect ($1,000) and SLO Repertory Theatre ($1,000), according to its 2025 IRS Form 990-PF. Together they received 38% of its itemized 2025 grant dollars.
How large is Carol and Warren Sinsheimer?
Carol and Warren Sinsheimer reported $82K in total assets on its 2025 IRS Form 990-PF. It paid out $12K in qualifying distributions that year, against a required minimum of $17K (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 does Carol and Warren Sinsheimer fund?
No mission statement for the foundation is provided. Its 2025 grants include support for healthcare, senior services, arts, mental health, domestic violence and sexual assault services, and environmental conservation. See mission & focus areas ↑
How do I apply for a grant from Carol and Warren Sinsheimer?
The foundation states that it makes contributions only to preselected charitable organizations and does not accept unsolicited requests for funds. Eligibility and process details are in the grantmaking section of this profile. See how to apply ↑
What is Carol and Warren Sinsheimer's EIN?
Carol and Warren Sinsheimer's EIN (Employer Identification Number) is 77-0457296. IRS Form 990 filing data is available on this page for 2019–2025.
Does Carol and Warren Sinsheimer accept unsolicited proposals?
No, according to Grantable's research on the foundation's published guidelines. See how to apply ↑
Data last updated October 2026. Sourced from IRS Form 990-PF filings. Research dossier generated September 2026.
Data update history
(7)
When this profile's IRS filing data changed on Grantable
- Updated Form 990-PF for fiscal year 2019 (received by the IRS January 16, 2020)
- Updated Form 990-PF for fiscal year 2021 (received by the IRS December 17, 2021)
- Updated Form 990-PF for fiscal year 2022 (received by the IRS November 21, 2022)
- Updated Form 990-PF for fiscal year 2023 (received by the IRS February 13, 2024)
- Updated Form 990-PF for fiscal year 2024 (received by the IRS January 27, 2025)
- Updated Form 990-PF for fiscal year 2025 (received by the IRS February 12, 2026)
- IRS filings on file for fiscal years 2019–2025
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