The Endurance Fund
The Endurance Fund is a private foundation based in Nicasio, California. The organization filed a final return in 2024, indicating it has concluded its grantmaking activities.
Financial Overview
From 2024 IRS Form 990-PF · View filing
Total Assets
—
-100.0% YoY
Annual Giving
$6.2M
+2298.4% YoY
Grant Count
49
+58.1% YoY
Avg Grant Size
$127K
+1417.4% YoY
Under IRS private-foundation payout rules, The Endurance Fund reported a distributable amount of $121K for 2024 — the minimum it must pay out in qualifying distributions.
Mission & Focus Areas
The foundation's grantmaking has focused on:
- Education
- Philanthropy, Voluntarism & Grantmaking
- Human Services
- Renewable Energy
- Land Conservation
- Marine and Water Conservation
- STEM Education
Grantmaking
The foundation does not have a formal application form. Applicants must provide:
Grant Range
$20 to $3,335,743
Review Cycle
and no restrictions or limitations on awards by geographical areas, charitable fields, kinds of institutions, or other factors.
How to Apply
**
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Geographic Focus
Where this funder awards grants
The foundation has supported organizations across multiple states, including:
- California
- Rhode Island
- Massachusetts
- New York
- Washington, D.C.
- And various other U.S. cities and states
Grant Distribution by State
States
Cities
Financial History
Multi-year comparison from IRS filings
Assets & Revenue (Most Recent Filing - 2024):
- Total assets: $0 (as reported on final return)
- Total giving: $6,242,328
- Total expenses: $283,192
- Total revenue: $238,510
Historical Assets:
- Previous year assets: $6,041,379 (representing a 2.6% increase from the prior year before the final return)
| Metric | 2024 | 2023 | 2022 |
|---|---|---|---|
| Total Assets | — | $6,041,379 | $5,582,028 |
| Revenue | $462,678 | $238,510 | $-247,387 |
| Expenses | $6,294,326 | $283,192 | $393,732 |
| Qualifying Distributions | $6,289,799 | $283,091 | $389,865 |
| Net Investment Income | $462,570 | $238,420 | $34,710 |
| Distributable Amount | $120,681 | $277,362 | $307,006 |
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 2024
Grant Size Distribution
168 grants across all recorded years
Giving History
Grant recipients and amounts by year
Among its reported 2024 grants, the largest include Marin Community Foundation ($3,335,743), Vanguard Charitable Program ($2,631,590), Vanguard Charitable Program ($50,000).
| Recipient | Purpose | Amount |
|---|---|---|
| KQED San Francisco, CA | General Suppport | $2,000 |
| Nicasio Volunteer Fire Dept Nicasio, CA | General Support | $500 |
| Redwood Empire Food Bank Santa Rosa, CA | General Support | $1,000 |
| Vanguard Charitable Program Southeastern, PA | The Granite Fund | $50,000 |
| West Marin Senior Services Point Reyes Station, CA | General Support | $1,000 |
| Vanguard Charitable Program Warwick, RI | The Meili Fund | $50,000 |
| Mountain Play Association San Rafael, CA | General Support | $1,000 |
| Nicasio Historical Society Nicasio, CA | General Support | $200 |
| Nicasio Land Preserve Nicasio, CA | General Support | $150 |
| LEAP Lagunitas School Savers San Geronimo, CA | General Support | $5,000 |
Leadership & Key People
Leadership team and compensation from IRS filings
The foundation is managed by two uncompensated trustees:
- Robert G Schiro (Trustee, 10 hours/week)
- Dorene C Schiro (Trustee, 20 hours/week)
Contact Information: Robert G Schiro 1749 Nicasio Valley Road Nicasio, CA 94946 (415) 488-4311
Compensation Overview
From 2024 IRS filing
From 2024 filing
| Name | Title | Hours | Compensation |
|---|---|---|---|
| Robert G Schiro | Trustee | 10 | — |
| Dorene C Schiro | Trustee | 20 | — |
Recent News & Activity
Recent developments and announcements
The foundation filed a final return for tax year 2024, indicating the conclusion of its grantmaking operations.
Frequently Asked Questions
What does The Endurance Fund fund?
The foundation's grantmaking has focused on: • Education • Philanthropy, Voluntarism & Grantmaking • Human Services • Renewable Energy • Land Conservation • Marine and Water Conservation • STEM Education
How do I apply for a grant from The Endurance Fund?
**Grant Activity:** • Total giving: $6,242,328 • Number of grants awarded: 49 grants (as of 2024) • Grant range: $20 to $3,335,743 • Median grant amount: $1,100 **Application Process:** The foundation does not have a formal application form. Applicants must provide: • Details of the purpose of the grant • Verification of the applicant's tax-exempt status There are no submission deadlines and no restrictions or limitations on awards by geographical areas, charitable fields, kinds of institutions…
Where does The Endurance Fund make grants?
The foundation has supported organizations across multiple states, including: • California • Rhode Island • Massachusetts • New York • Washington, D.C. • And various other U.S. cities and states
What size grants does The Endurance Fund award?
In 2024, The Endurance Fund awarded 49 grants totaling $6.2M — an average of about $127K per grant, based on its IRS Form 990 filings.
How much is The Endurance Fund required to give away each year?
Private foundations must generally distribute about 5% of their assets annually. For 2024, The Endurance Fund reported a distributable amount of $121K on its IRS Form 990-PF — the minimum it must pay out in qualifying distributions.
What is The Endurance Fund's EIN?
The Endurance Fund's EIN (Employer Identification Number) is 94-3170349. IRS Form 990 filing data is available on this page for 2020–2024.
Explore Open Grants
Browse active grant opportunities in The Endurance Fund's focus areas in our free grants database
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Data last updated June 2026. Sourced from IRS Form 990-PF filings. Research dossier generated April 2026.
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