William and Inez Mabie Family Foundation
The William and Inez Mabie Family Foundation is a private foundation based in Napa, California. Its 2021 filing reports 16 grants totaling $1,645,500 to organizations working in areas including legal education and assistance, scholarships, ALS services and research, conservation, food access, and education.
William and Inez Mabie Family Foundation at a glance
In short: William and Inez Mabie Family Foundation gave $1.6M across 16 grants in 2021 (avg $103K), mostly in California. Source: 2021 IRS Form 990-PF.
- Annual giving (2021)
- $1,645,500
- +113.4% vs 2020
- Grants made (2021)
- 16
- +220.0% vs 2020
- Average grant
- $102,844
- -33.3% vs 2020
- Median grant
- $10,000
- Total assets
- $3,090,254
- -23.0% vs 2020
- Primary geography
- California (96% of itemized 2021 grant dollars)
- Latest 990 filing
- Form 990-PF, 2021 View filing
Data from IRS Form 990-PF, 2021; updated October 2026.
How to apply to William and Inez Mabie Family Foundation
- How to Apply
-
The 2021 filing says the foundation did not restrict giving to preselected organizations. It lists no application form or materials, deadlines, or award restrictions, and names Yeoryios C Apallas as the person to contact. These filing instructions should not be treated as current because the most recent filing on record is from 2021 and the foundation appears to have stopped grantmaking.
- Contact
Application contact: Yeoryios C Apallas
Mailing address: 4054 Silverado Trail, Napa, CA 94558-1119
Phone: (707) 320-3806
Application details from Grantable's research on the foundation's public materials; confirm on its website before applying.
Who William and Inez Mabie Family Foundation funds
How this funder distributes its grants
Top Recipients
Top 10 recipients in 2021
The largest 2021 recipient was Santa Clara Law School ($750K). Together the top 10 received $1.6M.
Grant Size Distribution
21 grants across all recorded years
The most common grant size was under $50K: 15 grants of 21 (71%).
Geographic Focus
Where this funder awards grants
In 2021, 96% of grant dollars went to recipients in California, 3% to recipients in Arizona, and 1% to recipients in Virginia.
Grant Distribution by State
Share of 2021 grant dollars across all 16 itemized grants.
States
Cities
How William and Inez Mabie Family Foundation gives
- 6% of 2021 grantees were also funded in 2020. Method
Estimate from itemized grant lists in IRS Form 990-PF filings (2021). 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 2020 to 2021, annual grant giving ranged from $771K (2020) to $1.6M (2021). In 2021 it made 16 grants totaling $1.6M.
Grants by year
Grant recipients and amounts by year
| Recipient | Purpose | Amount |
|---|---|---|
| Santa Clara Law School Santa Clara, CA | Promote legal education | $750,000 |
| UC Davis Foundation Davis, CA | Scholarships | $500,000 |
| ALS Gold West Chapter Woodland Hills, CA | Services and research for ALS | $200,000 |
| Immigration Institute of the Bay Ar Napa, CA | Legal assistance for immigrants | $50,000 |
| Center for Biological Diversity Tuscon, AZ | Advocacy and education for conservation | $50,000 |
| Equal Justice America Midothian, VA | Legal assistance to the poor | $16,000 |
| Community Food Bank of San Benito C Hollister, CA | Feed needy | $15,000 |
| Save Napa Valley Foundation Angwin, CA | Education | $10,000 |
| Connolly Ranch Education Center Napa, CA | Education | $10,000 |
| Sunrise Horse Ranch St Helena, CA | Horse rescue and equine therapy | $10,000 |
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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 |
|---|---|---|---|---|---|---|---|
| 2021 | $3,090,254 | $791,197 | $1,714,085 | $1,645,500 | 16 | $1,645,500 | $733,046 |
| 2020 | $4,013,142 | $389,091 | $836,929 | $771,000 | 5 | — | $323,202 |
Research compiled by Grantable AI from public sources. Last updated October 2026.
Mission & Focus Areas
No mission statement for the foundation is provided. Its 2021 grants show support for organizations with varied purposes. For example, the Center for Biological Diversity describes its work as protecting species and the lands, waters, and climate they need to survive. Save Napa Valley Foundation says it advocates for Napa Valley’s long-term viability as an agricultural community and addresses climate and natural-resource issues. Connolly Ranch Education Center says it helps children develop respect for the environment and an understanding of sustainable agriculture.
Other 2021 recipients included organizations providing legal assistance, scholarships, ALS-related services and research, food assistance, horse rescue and equine therapy, and wildland-fire education.
Grantmaking
In 2021, the foundation made 16 grants totaling $1,645,500. Grant amounts ranged from $500 to $750,000, with a median grant of $10,000. Its largest grants were $750,000 to Santa Clara Law School for legal education, $500,000 to UC Davis Foundation for scholarships, and $200,000 to ALS Gold West Chapter for ALS services and research.
Other grants included $50,000 to the Immigration Institute of the Bay Area for legal assistance to immigrants and $50,000 to the Center for Biological Diversity for conservation advocacy and education. Equal Justice America received $16,000 for legal assistance to people with low incomes; Community Food Bank of San Benito County received $15,000 to feed people in need; and Save Napa Valley Foundation, Connolly Ranch Education Center, Sunrise Horse Ranch, Maldanado Foundation, and The Napa Communities Firewise Foundation each received $10,000.
Leadership & Key People
Leadership team and compensation from IRS filings
The 2021 filing lists Sara B Malone as Vice President and Yeoryios C Apallas as Trustee.
William and Inez Mabie Family Foundation's 2021 filing lists 2 officers; 1 of 2 officers listed in 2021 is compensated.
Officers on the 2021 filing
Yeoryios C Apallas
Trustee
On filings since 2020
2 hrs/week
$25K (2020) → $25K (2021)
Sara B Malone
Vice President
On filings since 2020
0.5 hrs/week
No compensation reported
Data from IRS Form 990 filings, 2020–2021. "On filings since" is the earliest filing we hold that lists the person; hours are average hours per week as reported.
Compensation Overview
From 2021 IRS filing
The highest reported compensation on the 2021 filing was $25K, to Yeoryios C Apallas (Trustee).
Frequently asked questions about William and Inez Mabie Family Foundation
How much does William and Inez Mabie Family Foundation give each year?
William and Inez Mabie Family Foundation gave $1.6M across 16 grants in 2021, according to its 2021 IRS Form 990-PF. In 2020 it gave $771K across 5 grants.
What is William and Inez Mabie Family Foundation's typical grant size?
William and Inez Mabie Family Foundation's median grant in 2021 was $10,000, and its average grant was $102,844, across 16 grants on its 2021 IRS Form 990-PF.
Where does William and Inez Mabie Family Foundation give grants?
William and Inez Mabie Family Foundation gives mostly in California: 96% of the grant dollars itemized on its 2021 IRS Form 990-PF went to recipients there. The most frequent recipient cities were Napa, CA (5 grants) and St Helena, CA (3 grants).
Does William and Inez Mabie Family Foundation give general operating support?
Not in 2021: none of the 16 grants with a stated purpose on William and Inez Mabie Family Foundation's 2021 IRS Form 990-PF were described as general or operating support.
Who are William and Inez Mabie Family Foundation's largest grantees?
William and Inez Mabie Family Foundation's largest 2021 grantees include Santa Clara Law School ($750,000), UC Davis Foundation ($500,000) and ALS Gold West Chapter ($200,000), according to its 2021 IRS Form 990-PF. Together they received 88% of its itemized 2021 grant dollars.
How large is William and Inez Mabie Family Foundation?
William and Inez Mabie Family Foundation reported $3.1M in total assets on its 2021 IRS Form 990-PF. Its revenue that year was $791K.
What does William and Inez Mabie Family Foundation fund?
No mission statement for the foundation is provided. Its 2021 grants show support for organizations with varied purposes. For example, the Center for Biological Diversity describes its work as protecting species and the lands, waters, and climate they need to survive. See mission & focus areas ↑
How do I apply for a grant from William and Inez Mabie Family Foundation?
The 2021 filing says the foundation did not restrict giving to preselected organizations. Eligibility and process details are in the grantmaking section of this profile. See how to apply ↑
What is William and Inez Mabie Family Foundation's EIN?
William and Inez Mabie Family Foundation's EIN (Employer Identification Number) is 94-3054756. IRS Form 990 filing data is available on this page for 2020–2021.
Data last updated October 2026. Sourced from IRS Form 990-PF filings. Research dossier generated October 2026.
Data update history
(1)
When this profile's IRS filing data changed on Grantable
- IRS filings on file for fiscal years 2020–2021
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Figures come from William and Inez Mabie Family Foundation'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.
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