The Riva Foundation
The Riva Foundation is a private foundation, based in Arcadia, CA. IRS filing data is available from 2021 through 2025. As of 2025, the organization holds $462K in total assets. In 2025, it made $337 in qualifying distributions. Net investment income was $20K.
The Riva Foundation at a glance
- Total assets
- $461,602
- +4.5% vs 2024
- Revenue (2025)
- $20,603
- -11.3% vs 2024
- Qualifying distributions (2025)
- $337
- -27.1% vs 2024
- Expenses (2025)
- $675
- -27.0% vs 2024
- Latest 990 filing
- Form 990-PF, 2025 View filing
Data from IRS Form 990-PF, 2025; updated September 2026.
Who The Riva Foundation funds
How this funder distributes its grants
Grant Size Distribution
2 grants across all recorded years
The most common grant size was in the $100–250K range: 2 grants of 2 (100%).
Geographic Focus
Where this funder awards grants
Grant Distribution by State
States
Cities
How The Riva Foundation gives
- In 2025 it paid out 2% of its IRS minimum distribution (the 5% rule). Foundations have until the end of the next year to meet it. 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 2021 to 2023, annual grant giving ranged from $111K (2021) to $222K (2023). In 2023 it made 1 grant totaling $222K.
Grants by year
Grant recipients and amounts by year
| Recipient | Purpose | Amount |
|---|---|---|
| California Institute of Technology Pasadena, CA | To support autoimmunity research. No more than 10% of the grant may be used to support indirect costs. The specific project and/or program to be funded by this grant will be decided upon after review by caltech and the foundation. | $222,000 |
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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 | $461,602 | $20,603 | $675 | — | — | $337 | $20,265 | $21,997 |
| 2024 | $441,674 | $23,217 | $925 | — | — | $462 | $21,995 | $20,900 |
| 2023 | $419,382 | $22,070 | $222,925 | $222,000 | 1 | $222,462 | $21,607 | $30,220 |
| 2022 | $620,237 | $62 | $31,711 | — | — | $437 | — | $31,326 |
| 2021 | $651,886 | $76 | $114,835 | $111,000 | 1 | — | — | $37,429 |
Under IRS private-foundation payout rules, The Riva Foundation reported a distributable amount of $22K for 2025 — the minimum it must pay out in qualifying distributions.
Leadership & Key People
Officers and directors from IRS filings
The Riva Foundation is led by Samuel Geisberg, President on every filing since 2021; none of the 2 officers listed in 2025 report compensation.
Officers on the 2025 filing
Samuel Geisberg
President
On filings since 2021
No compensation reported
Mark Geisberg
Vice President
On filings since 2021
No compensation reported
Data from IRS Form 990 filings, 2021–2025. "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 Riva Foundation
How large is The Riva Foundation?
The Riva Foundation reported $462K in total assets on its 2025 IRS Form 990-PF. It paid out $337 in qualifying distributions that year, against a required minimum of $22K (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.
Where does The Riva Foundation operate?
The Riva Foundation has awarded grants in California.
What is The Riva Foundation's EIN?
The Riva Foundation's EIN (Employer Identification Number) is 95-4453171. IRS Form 990 filing data is available on this page for 2021–2025.
Data last updated September 2026. Sourced from IRS Form 990-PF filings.
Data update history
(1)
When this profile's IRS filing data changed on Grantable
- IRS filings on file for fiscal years 2021–2025
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