Arrillaga Foundation
The Arrillaga Foundation is a private foundation established in 1978 by John Arrillaga, a prominent Silicon Valley real estate developer. Based in Palo Alto, California, the foundation operates as a family foundation with a deliberate low public profile and no formal website or published application guidelines.
Financial Overview
From 2024 IRS Form 990-PF · View filing
Total Assets
$50.9M
+59.8% YoY
Annual Giving
$9.5M
+12.3% YoY
Grant Count
53
+341.7% YoY
Avg Grant Size
$178K
-74.6% YoY
Mission & Focus Areas
The foundation supports higher education, health and human services through programs operating primarily in the greater Bay Area (Menlo Park, Palo Alto, San Francisco), with additional support in Los Angeles and Hawaii. Funding priorities include general operating support and capital construction at universities.
Grantmaking
Grant Range
$185,000
Review Cycle
- No published guidelines
How to Apply
**
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Geographic Focus
Where this funder awards grants
Primary focus on California, particularly the Bay Area (Palo Alto, Menlo Park, San Francisco). Limited grants also support organizations in Hawaii and New York/Rhode Island. Grantmaking prioritizes California, with approximately one-third of grants supporting smaller organizations.
Grant Distribution by State
Cities
Financial History
Multi-year comparison from IRS filings
As of 2024:
- Total Assets: $50.9 million
- Total Revenues: $28.7 million
- Total Expenses: $9.8 million
- Total Liabilities: $5 million
As of 2023:
- Total Assets: $31.8 million
- Revenue: $2.29 million
- Expenses: $3.46 million
The foundation maintains tax-exempt status as a 501(c)(3) organization (EIN: 94-2460896), with tax-exempt status granted in April 1978.
| Metric | 2024 | 2023 | 2022 |
|---|---|---|---|
| Total Assets | $50,859,228 | $31,817,642 | $38,007,483 |
| Revenue | $28,664,150 | $2,288,053 | $30,405,036 |
| Expenses | $9,787,126 | $3,457,392 | $25,683,707 |
| Qualifying Distributions | $9,451,000 | $8,415,503 | $15,528,071 |
| Net Investment Income | $3,291,706 | $1,053,163 | $1,594,282 |
| Distributable Amount | $1,423,369 | $1,584,853 | $1,607,697 |
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
97 grants across all recorded years
Giving History
Grant recipients and amounts by year
No grants recorded for .
Leadership & Key People
Leadership team and compensation from IRS filings
- Laura Arrillaga-Andreessen - Co-President (20 hours/week, no compensation)
- John Arrillaga Jr. - Co-President (no compensation)
- Marc Andreessen - Treasurer (no compensation)
- Justine Stamen Arrillaga - Secretary (no compensation)
The foundation is led by the children of founder John Arrillaga, who passed away in January 2022. Laura Arrillaga-Andreessen also founded the Institute on Generosity (formerly the Laura Arrillaga-Andreessen Foundation) to advance philanthropy education and giving circles.
Compensation Overview
From 2024 IRS filing
From 2024 filing
| Name | Title | Hours | Compensation |
|---|---|---|---|
| LAURA ARRILLAGA-ANDREESSEN | CO-PRESIDENT | 5 | — |
| JOHN ARRILLAGA JR | CO-PRESIDENT | 5 | — |
| MARC ANDREESSEN | TREASURER | — | — |
| JUSTINE STAMEN ARRILLAGA | SECRETARY | 5 | — |
Contact Information
Address: 2450 Watson Court, Palo Alto, CA 94303-3216
Phone: 650-618-7000
Website: None
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Data last updated April 2026. Sourced from IRS Form 990-PF filings. Research dossier generated April 2026.
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