The Robert & Lois Atherton Foundation
The Robert & Lois Atherton Foundation is a private foundation, based in San Juan Capistrano, CA. IRS filing data is available from 2020 through 2025. As of 2025, the organization holds $233K in total assets. In 2025, it awarded 1 grant totaling $20K. Net investment income was $13K.
The Robert & Lois Atherton Foundation at a glance
In short: The Robert & Lois Atherton Foundation gave $20K across 1 grant in 2025 (avg $20K), mostly in California. Source: 2025 IRS Form 990-PF.
- Annual giving (2025)
- $20,000
- +33.3% vs 2024
- Grants made (2025)
- 1
- +0.0% vs 2024
- Average grant
- $20,000
- +33.3% vs 2024
- Median grant
- $20,000
- Total assets
- $233,252
- -3.6% 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 The Robert & Lois Atherton Foundation funds
How this funder distributes its grants
Top Recipients
Top recipient in 2025
The largest 2025 recipient was Loyola Marymount University ($20K).
Grant Size Distribution
5 grants across all recorded years
The most common grant size was under $50K: 5 grants of 5 (100%).
Geographic Focus
Where this funder awards grants
Grant Distribution by State
Share of the 2025 grant dollars on its one itemized grant.
States
Cities
How The Robert & Lois Atherton Foundation gives
- Giving grew 33% from 2022 to 2025. Method
- In 2025 it paid out 170% of its IRS minimum distribution (the 5% rule). 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 2020 to 2025, annual grant giving ranged from $15K (2022) to $20K (2025). In 2025 it made 1 grant totaling $20K.
Grants by year
Grant recipients and amounts by year
| Recipient | Purpose | Amount |
|---|---|---|
| Loyola Marymount University Los Angeles, CA | To fund the education of a deserving student attending Loyola Marymount University. | $20,000 |
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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 | Distributable Amount |
|---|---|---|---|---|---|---|---|---|
| 2025 | $233,252 | $12,562 | $21,225 | $20,000 | 1 | $20,000 | $12,562 | $11,785 |
| 2024 | $241,915 | $7,205 | $17,759 | $15,000 | 1 | $15,000 | $7,205 | $12,406 |
| 2023 | $252,469 | $-13,333 | $16,954 | $15,000 | 1 | $15,000 | $1,755 | $13,102 |
| 2022 | $282,757 | $1,702 | $16,046 | $15,000 | 1 | $15,000 | $1,702 | $13,906 |
| 2021 | $297,100 | $1,489 | $16,297 | $15,300 | 1 | $15,300 | $1,489 | $14,646 |
| 2020 | $311,909 | $1,383 | $17,543 | $16,300 | 1 | — | $1,383 | $15,295 |
Under IRS private-foundation payout rules, The Robert & Lois Atherton Foundation reported a distributable amount of $12K for 2025 — the minimum it must pay out in qualifying distributions.
Leadership & Key People
Officers and directors from IRS filings
The Robert & Lois Atherton Foundation is led by Anthony Maus, President & CEO on every filing since 2020; none of the 3 officers listed in 2025 report compensation.
Officers on the 2025 filing
Anthony Maus
President & CEO
On filings since 2020
No compensation reported
Victoria F. Maus
Director
On filings since 2024
No compensation reported
Geoffrey B. Maus
Secretary
On filings since 2020
No compensation reported
Data from IRS Form 990 filings, 2020–2025. "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 The Robert & Lois Atherton Foundation
How much does The Robert & Lois Atherton Foundation give each year?
The Robert & Lois Atherton Foundation gave $20K across 1 grant in 2025, according to its 2025 IRS Form 990-PF. In 2024 it gave $15K across 1 grant.
How large is The Robert & Lois Atherton Foundation?
The Robert & Lois Atherton Foundation reported $233K in total assets on its 2025 IRS Form 990-PF. It paid out $20K in qualifying distributions that year, against a required minimum of $12K (roughly 5% of its investment assets).
Where does The Robert & Lois Atherton Foundation operate?
The Robert & Lois Atherton Foundation has awarded grants in California.
What is The Robert & Lois Atherton Foundation's EIN?
The Robert & Lois Atherton Foundation's EIN (Employer Identification Number) is 33-0853742. IRS Form 990 filing data is available on this page for 2020–2025.
Data last updated September 2026. Sourced from IRS Form 990-PF filings.
Data update history
(2)
When this profile's IRS filing data changed on Grantable
- Added Form 990-PF for fiscal year 2025 (received by the IRS May 6, 2026)
- IRS filings on file for fiscal years 2020–2024
Live grants for the work The Robert & Lois Atherton Foundation funds
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